Download 02-03 Honda Civic Si Service Manual
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Fueland Emissions Fueland EmissionsSystems SpecialTools 1't-2 General Troubleshooting Information I I-J DTCTroubleshooting lndex .... 11-7 SymptomTroubleshooting 1ndex............... 11 - 1 0 SystemDescriptions ................ 11-12 Howto SetReadiness Codes.. 11-46 PGM-FlSystem Component Location Index .... 11-49 D T CT r o u b l e s h o o t i n. .g. . . . . . . . .11-52 ... MILCircuitTroubleshooting ... 11-97 DLCCircuitTroubleshooting .. 1 1 - 1 0 9 InjectorReplacement ............... 11-111 A,/FSensorReplacement .........1 1 - 1 1 3 HO2S Secondary Replacement 11-113 ECTSensorReolacement.......1 1 - 1 1 4 CMPSensorB {TDCSensor) Replacement 11-114 I A TS e n s oR r e p l a c e m e.n. t. . . . . 1. .1 - 1 1 5 KnockSensorReplacement .... 1 1 - 1 1 5 CKPSensorReolacement .......1 1 - 1 1 6 VTEC/VTC LocationIndex .... 11-117 Comoonent D T CT r o u b l e s h o o t i n. .g. . . . . . . . .1.1. .- 11 8 VTCOil ControlSolenoid ValveRemoval/Test ............. 11-127 CMPSensorA Replacement ... 11-128 VTECSolenoid Valve R e m o v a l / l n s o e c t.i .o. n. . . . . . .11-128 ... ldle ControlSystem Location Index Component 11-129 . . . . . . . . . . .1. .I.- 1 3 0 D T CT r o u b l e s h o o t i n g A,/CSignalCircuit T r o u b l e s h o o t i n.S. . . . . . . . . . . . . .I .t.-. t.5 5 AlternatorFRSignalCircuit T r o u b l e s h o o t i n.S. . . . . . . . . . . . . .1. 1. .-. 1 3 4 EPSSignalCircuit T r o u b l e s h o o t i n.S. . . . . . . . . . . . . .1.1. .-1. 3 5 Brake PedalPosition SwitchSignal Troubleshooting ............. Circuit 11 - 1 3 7 ldle SpeedInspection 11 - 1 3 8 E C Ml d l el e a r nP r o c e d u r e. . . . . . .11 - 1 3 9 FuelSupplySystem ComponentLocationIndex 11 - 1 4 0 FuelPump Circuit Troubleshooting 1 1 - 1 4 1 F u e lP r e s s rue R e l i e v i n g. . . . . . . . .1. .1 - 1 4 4 F u eP l r e s s u r e T e s. .t. . . . . . . . . . . .1. 1. .-.1. 4 5 FueL l i n e sI n s p e c t i o.n. . . . . . . . . .1. .1. .- 1 4 6 FuelLine/Ouick-Connect FittingsPrecautions............. 11-148 FuelLine/Ou ick-Con nect F i t t i n gR s e m o v a l. . . . . . . . . . . . .1. 1. .-.1. 4 9 FuelLine/Ou ick-Con nect F i t t i n glsn s t a l l a t i o.n. . . . . . . . . .1. .1. .- 1 5 0 FuelPressure Regulator R e p l a c e m e .n.t. . . . . . . . . . . . . . . 1 . .1. .-.1. .5. 2 FuelFifterReplacement ........... 11-152 FuelPump/Fuel GaugeSending . .1. .-.1 5 3 U n i t R e D l a c e m e. .n. t. . . . . . . . . 1 F u eP l u l s a t i oDna m o e r R e p 1 a c e m e. n . .t. . . . . . . . . . . . . . 1 . .1. .-.1. .5. 4 F u eT l a n kR e o l a c e m e n . .t. . . . . . .1. 1. - 1 5 5 F u eGl a u g e S e n dUi n igt T e s. .t . . . .1. 1 - 1 5 6 11-158 LowFuellndicatorTest ................. IntakeAir System C o m o o n e nLt o c a t i o nI n d e x . . . . 1 1 - 1 5 9 T h r o t t l eB o d y T e s t . . . . . . . . . . . . . . 1 . .1. .-.1 6 0 IntakeAir BypassControl T h e r m aV l a l v eT e s t . . . . . . . . . . .1. .1. - 1 6 1 A i r C l e a n eR r e o l a c e m e n .t . . . . . .1. 1 - 1 6 2 A i r C l e a n eE r lement R e o l a c e m e n.t. . . . . . . . . . . . . . . . . 1 . .1. .-.1. .6 2 ThrottleCableAdjustment ...... 11-163 ThrottleCable Removal/lnstallation ............ 11-164 Th rottleBody Removal/ Installation .. 11-165 Th rottleBody Disassembly/ R e a s s e m b l v. . . . . . . . . . . . . . . . . . .1. .1. .- .1. 6. 6 CatalyticConverterSystem D T CT r o u b l e s h o o t i n. .g. . . . . . . . .1.1. .- 1 6 7 PCVSystem D T CT r o u b l e s h o o t i n g. . . . . . . . . . .1. .1.- 1 6 8 PCVValveInsDection a n dT e s t . . . . . .11 -1 6 9 P C VV a l v eR e o l a c e m e n.t. . . . . . . .1.1 - 1 6 9 EVAPSystem C o m p o n e nLt o c a t i o nI n d e x . . . . 1 1 - 1 7 0 D T C T r o u b l e s h o o t i n.g. . . . . . . . . .1. .1. - 1 7 1 EVAPTwo Way ValveTest ......11-186 FuelTank VaoorControl ValveTest ... 11-187 E V A PC a n i s t eR r e p l a c e m e n.t. . 1 1 - 1 8 9 FuelTank VaoorControl V a l v eR e o l a c e m e n.t. . . . . . . . . .1. .1.- 1 8 9 Fueland EmissionsSystems SpecialTools Rel. No. (L) @ o @ @ @ o @-t @-2 O-3 @-4 @ (iD Tool Number ffi W I o 1 1 1 /6\ l\r )l \-,/ \7 @ -'-,---=---1,-'. ut/t 'jt' o @ (i) I 2 /'r';-:'-;--' At-'' UtB o \- 1 1 --1 a=:t=' (F ( otv Description V a c u u mP u m p / G a u g e0, 3 0 i n . H g Vacuum/Pressure Gauge.0 4 in.Hg BackprobeSet Fuel PressureGaugeAdapter PressureGaugeAdapter FuelSenderWrench Hose,Oil Pressure A,/TPressureHose A,/TLow PressureGaugeW/Panel A,/TPressureHose,2,210 mm A,/TPressureHoseAdapter F u e lP r e s s u r eG a u g e FuelPressureGauoeSet A973X-041-XXXXX 07JAZ-0010008 07sAz-001000A 07vAJ-0040100 07NAJ-P07010A 07xAA-001010A 07zAJ-S5AA200 07406-0020201 07406-0070300 OTMAJ-PY4O11A 07MAJ-PY40120 07406-004000A 07zAJ-S5A0100 \, ) i-==.€ *==-.2'l -1,40-2, -3,@-4 \\h *.'l€) \\: \\d o @ \- 11-2 a GeneralTroubleshooting Information IntermittentFailures The term "intermittentfailure" means a svstem mav have had a failure.but it checksOK now. lf the MalfunctionIndicatorLamp (MlL)on the dash does not come on, checkfor Doorconnectionsor looseterminals at all connectorsrelatedto the circuitthat Vou are troubleshooting. 2. lf the MIL stayson, connectthe HondaPGM Tester (A) or an OBD ll scantool to the Data Link Connector{DLC)(B) locatedunderthe driver'sside o f t h ed a s h b o a r d . Opensand Shorts "Ooen" and "Short" are common electricalterms.An open is a breakin a wire or at a connection.A short is an accidentalconnectionof a wire to ground or to anotherwire. In simple electronics,this usuallymeans somethingwon't work at all. With complex electronics ( s u c ha s E C M s ) t h i sc a n s o m e t i m e sm e a ns o m e t h i n g works, but not the way it's supposedto. How to Usethe PGMTesteror a ScanTool 3 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . lf the MIL {Malfunction Indicator Lamp} has come on '1. S t a r tt h e e n g i n ea n d c h e c kt h e M I L { A ) . N O T E l: f t h e i g n i t i o ns w i t c hi s t u r n e dO N ( l l ) ,a n d the engine is not started,the MIL will stay on for 1 5 2 0 s e c o n d s( s e ep a g e1 1 - 4 6 ) . K->;"PN/.- -:::--d V-: ! w:ix&K# Checkthe DiagnosticTroubleCode (DTC)and note it. Also checkthe freezedata.Referto the DTC T r o u b l e s h o o t i nIgn d e x ,a n d b e g i nt h e a p p r o p r i a t e troubleshootingprocedure. 5 . lf you do not find any DTCS,go to MIL circuit t r o u b l e s h o o t i n(gs e ep a g e1 1 - 9 7 ) . NOTE: . Freezedata indicatesthe engineconditionswhen the first malfunction,misfire,or fuel trim malfunction was detected. . The scantool and the Honda PGM Testercan readthe DTC,freezedata,currentdata,and other Engine Controll\4odule{EClvl)data. . For specificoperations,referto the user's manual that came with the scantool or HondaPGl\4Tester. lf the MIL did not stay lf the MIL did not come on but there is a driveability problem,referto the Symptom TroubleshootingIndex i n t h i ss e c t i o n . lf you can't duplicate the DTC Some of the troubleshootingin this sectionrequires you to resetthe ECM and try to duplicatethe DTC.lf rhe problem is intermittentand you can't duplicatethe code, d o n o t c o n t i n u et h r o u g ht h e p r o c e d u r eT. o d o s o w i l l o n l y r e s u l ti n c o n f u s i o na n d ,p o s s i b l ya, n e e d l e s s l y r e p l a c e dE C M . (cont'd) 11-3 Fueland EmissionsSystems J GeneralTroubleshootingInformation(cont'dl How to Resetthe ECM You can resetthe ECM in eitherof two ways: . U s et h e O B Dl l s c a n t o o lo r H o n d aP G M T e s t e r t o resetthe ECM memory. Seethe OBD ll scantool or HondaPGI\4Testeruser's manualsfor specificinstructions. ' Turn the ignition switch OFF,and removethe No. 6 ECU{ECM}(15A)fuse (A)from the under-hoodfuse/ r e l a vb o x ( B l f o r 1 0 s e c o n d s . How to Removethe ECMfor Testing 1. Removethe passenger'sdashboardlower cover {seepage 20-63),the passenger'skick panel (see page 20-63),and the glove box (seepage 20-63). 2. Removethe ECM mounting bolts (B)and the ECM (c), 9.8 N.m {1.0kgf.m,7.2lbt.ft} 3 . R e m o v et h e E C M ( B ) . How to Enda TroubleshootingSession (requiredafterany troubleshootingl L 4. Installthe ECM in the reverseorder of removal. 1. Resetthe ECM as describedabove. 2 . D o t h e E C Mi d l e l e a r np r o c e d u r e( s e ep a g e1 1 - 1 3 9 ) 3. Turn the ignition switch OFF. 4. DisconnecttheOBD ll scantool or Honda PGM Testerfrom the DLC. NOTE:The ECM is part of the immobilizersystem. lf vou replacethe ECM,it will have a different immobilizercode. In order for the engineto start, you must rewritethe immobilizercode with the Honda PGM Tester. \- ta 11-4 How to TroubleshootCircuitsat the ECM Special Tools Required . DigitalMultimeterKS-AHM-32-003 (1) or a commerciallyavailabledigital multimeter . BackprobeSet 07SAZ-0010004 (2) 1. Connectthe backprobeadapters(A) to the stacking patchcords (B),and connectthe cords to a digital m u l t i m e t e (r C ) . 2 . U s i n gt h e w i r e i n s u l a t i o n a s a g u i d ef o r t h e contouredtip ofthe backprobeadapter,gently slide the tip into the connectorfrom the wire side until it touchesthe end of the wire terminal. 3. lf you cannot get to the wire side of the connector or the wire side is sealed(A),disconnectthe connectorand probe the terminals(B)from the terminal side. Do not force the Drobeinto the connector. Do not puncturethe insulationon a wire. Puncturescan causeDooror intermittent electricalconnections. 07sAz-001000A (cont'd) 11-5 Fueland EmissionsSystems Information(cont'd) GeneralTroubleshooting ECMUpdatingand Substitutionfor Testing Special Tools Bequired HondaInterfaceModule (HlM) EOS05435570 ( How to Substitute the ECM '1. Removethe ECMf rom the vehicle. 2. Installa known-goodECM in the vehicle. Usethis procedurewhen you haveto substitute a known-goodECM in a troubleshootingprocedure. does not alreadyhave U pdatethe ECMonly if the ECN4 the latestsoftwareloaded, NOTE; . lMakesure the batteryis fully chargedbeforeyou updatethe ECN4. . To preventECMdamageduring the update,do not turn the ignition switch OFF,and do not use any of the vehicle'selectricaldevices(light,horn, radio,etc. ). 3 . R e w r i t et h e i m m o b i l i z ecr o d ew i t h t h e E C M replacementprocedurefrom the Honda PGM Tester.lt allows you to startthe engine. 4. After completingyour tests,reinstallthe original E C Ma n d r e w r i t et h e i m m o b i l i z ecr o d ew i t h t h e E C Mr e p l a c e m e nptr o c e d u r e o n t h e H o n d aP G M T e s t e ra g a i n . How to Update the ECM 1. Turn the ignition switch ON (ll).Do not startthe e n gI n e . 2. Connectthe HondalnterfaceModule (HlM)to the Data Link Connector{DLC)(A) locatedunderthe d r i v e r ' ss i d eo f d a s h b o a r d . L EOS05A35570 Do the ECM updateprocedureas describedon the HlN4label and in the ECM updatesystem. \- 11-6 I DTCTroubleshootingIndex DTC Temporary DTC Detection ltem {MlLindication*) P 0 0 1 (05 6 ) VariableValveTiming Control{VTC)Oil Control P 0 0 1 (15 6 ) P0011 P 0 1 0 (73 ) P 0 1 0 (83 ) P 0 1 1 2( 1 0 ) (10) P01r3 P 0 1 1 6{ 8 6 ) P0116 S o l e n o i dV a l v eM a l f u n c t i o n VariableValveTiming Control(WC) System Malfunction Note { s e ep a g e11 ' 11 8 ) ( s e ep a g e1 1 -11 9 ) (MAP)SensorCircuit ManifoldAbsolutePressure LowVoltaqe (MAP)SensorCircuit ManifoldAbsolutePressure HiqhVoltaqe ( s e ep a g e1 ' l - 5 2 1 IntakeAir Temperature(lAT)SensorCircuitLow Voltaoe IntakeAir Temperature(lAT)SensorCircuitHigh Voltaoe EnglneCoolantTemperature(ECT)Sensor Range/ PerformanceProblem (seepage 11-55) ( s e ep a g e1 1 - 5 3 ) (seepage '11-56) { s e ep a g e1 1 - 5 7 ) P0117 {6) (ECT)SensorCircuit EngineCoolantTemperature LowVoltaqe ( s e ep a g e1 1 - 5 8 ) P 0 1 1{86 ) EngineCoolantTemperature(ECT)SensorCircuit Hiqh Voltaqe Throttle Position(TP)SensorCircuitLow Voltaqe Throttle Posltion(TP)SensorCircuitHiqh Voltaoe CoolinqSVStemMalfunction Air Fuel Ratio(Ay'F) Sensor(Sensor1) No Activity Detected SecondaryHeatedOxygen Sensor (SecondaryHO2S) (Sensor2) CircuitLow Voltaqe SecondaryHeatedOxygen Sensor (SecondaryHO2S) ( S e n s o2 r ) C i r c u i tH i q hV o l t a q e SecondaryHeatedOxygen Sensor (SecondaryH02S) ( S e n s o2 r )SlowResDonse SecondaryHeatedOxygen Sensor(SecondaryH02S) (Sensor2) HeaterCircuitMalfunction { s e ep a g e1 1 - 5 9 ) P 0 1 2 t27 \ P 0 1 2 {37 ) P 0 1 2 8( 8 7 ) P 0 1 3 4( 4 1 ) P0128 P 0 1 3 (76 3 ) P0137 P 0 1 3 8( 6 3 ) P0138 P 0 1 3 (96 3 ) P0139 P 0 1 4 1( 6 5 ) P 0 1 7 1( 4 5 ) PO112l'45) PO\11 PO\l2 P0300andany of P 0 3 0 (17 1 ) (721 PO302 P0303(73) P0304(74) P0301(7'1) P0300andany of P0301 P0302 P0303 P0304 P0301 No. 1 Cyl n d e rM i s f i r e P0302 No.2 Cvl n d e rM i s f i r e P0303 N o . 3 C v l nder Misfire FuelSvstemToo Lean FuelSystemToo Rich R a n d o mM i s f i r e ( s e eD a q e1 1 - 6 0 ) ( s e ep a q e1 1 - 6 2 ) ( s e eD a q e1 1 - 6 4 ) ( s e ep a g e1 1 - 6 5 ) ( s e ep a g e1 1 - 6 5 ) ( s e ep a g e1 1 - 6 6 ) ( s e ep a g e1 1 - 6 7 ) ( s e ep a g e1 1 - 6 8 ) ( s e ep a q e1 1 - 7 0 ) ( s e eo a o e1 1 - 7 0 ) ( s e ep a g e1 1 - 7 1 ) { s e ep a g e1 1 - 7 2 ) { s e ep a q e11 - 7 2 ) ( s e eo a q e1 1 - 7 2 ) P0303(73) P0304{74) P0304 N o . 4 C v l nder Misfire {seeDaqe11-72) " ; T h e s e D T C sa r e i n d i c a t e db y a b l i n k i n gm a l f u n c t i o ni n d i c a t o lra m p ( M l L ) w h e nt h e S C Ss e r v i c es i g n a l i n e i s jumped with the Honda PGM Tester. P0302(721 {cont'd) 11-7 Fueland EmissionsSystems DTCTroubleshootingIndex(cont'd) ( \ KnockSensorCircuitN4alfunction PO4i{ P 0 4 5 1( 9 1 ) TU45I P0452 CrankshaftPosition(CKP)SensorIntermittent ( s e ep a g e1 1 - 7 8 ) CamshaftPosition(CMP)SensorA No CamshaftPosition(CMP)SensorA Intermiftent ( s e eo a q e1 1 - 1 2 1 i s e ep a g e1 1 - 1 2 1 ) Phqse G Yetrgb-le VelyeTiTing_controlll/T!) s e eo a o e1 1 - 1 2 2 CqJalystSystemElficie-ncy Below Threshold s e eo a q e11 -1 6 7 ( F T PS ) e n s o rR a n g e / P e r f o r m a n c e( s e e p a g e l l 1 7 1 ) F u e lT a n kP r e s s u r e SensorCircuitLow V FuelTank Pressure(FTP)SensorCircuitHigh V V e h i c l eS D e e dS e n s o r C i r c u i tM a l fu n c t i o n E n g i n eC o n t r o M l o d u l e( E C N 4P)o w e rS o u r c eC i r c u i l 11-172 s e eD a q e1 1 - 1 3 0 ) ( s e ep a g e11 - 8 1 ) SeriaC l o m m u n i c a t i o Ln i n kM a l f u n c t i o n Referto the l\4ultiplex ControlSystem T r o u b l e s h o o t i n{gs e e P 1 1 0(61 3 ) (BARO) Barometric Pressure SensorRange/ PerformanP c er o b l e m ( s e ep a g e11 - 8 3 ) P 1 1 0(?1 3 ( B A R OS ) e n s o rC i r c u i tL o w BarometriP c ressure ( s e ep a S e11 ' 8 3 ) P 11 0 8( t s ' ( B A R OS ) e n s o rC i r c u i tH i g h BarometriP c ressure { s e ep a g e1 1 - 8 3 ) P112111) P't121 T h r o t t l eP o s i t i o n{ T P iS e n s o rS i g n a lL o w e rT h a n ( s e ep a g e1 1 - 6 3 ) P1122ll J Pl122 T h r o t t l eP o s i t i o n( T P )S e n s o rS i g n a lH i g h e rT h a n tsee page I r-oJ, i j 1 1 2 8( 5 ) P11f,.8 Pr 158 (48) (l\,4AP M a n i { o l dA b s o l u t eP r e s s u r e S }e n s o rS i g n a l G;tp"s" 1154) Loqer Than Expected ( * " p a S e11 5 4 ) ManifoldAbsolutePreisure (MAP)SeiiioiSgnul H i q h e rT h a nE x ( s e ep a g e1 1 - 8 4 ) A i r F u e lR a t i o( A V FS) e n s o r( S e n s o r1 ) R a n g e / R e r f o r m a n cP eroblem A i r F u e lR a t i o { A " FS) e n s o r{ S e n s o 1 r ) A F S T e r m i n a l ( s e ep a g e11 - 8 5 ) P 11 5 9( 4 8 ) 'l) A i r F u e lR a t i o1 A V FS)e n s o ri s e n s o r A F S+ T e r m i n a l ( s e ep a g e11 - 8 6 ) P 1 1 6 3( 6 1 P 1 1 6 4( 6 1 ) Air FuelRatio{A,/F)Sensor{SensorI ) Slow Response ( s e ep a g e 11 - 8 8 ) A i r F u e lR a t i o( A / F )S e n s o r( S e n s o r1 ) R a n g e / P 11 2 9( 5 ) P 1 1 5 7( 4 8 ) l\." - P 11 6 6( 4 1 ) ( s e ep a g e1 1 - 8 9 ) Air Fuel Ratio(4,/F)Sensor(Sensor1) HeaterCircuit Malfunction Air Fuel Ratio(A,/F)Sensor(Sensor1) HeaterSystem ( s e ep a g e1 1 - 9 1 ) P 11 6 7( 4 1 )' Malfunction " : T h e s eD T C Sa r e i n d i c a t e db y a b l i n k i n gM I L w h e n t h e S C Ss e r v l c es i g n a l i n e i s j u m p e dw i t h t h e H o n d aP G M Tester. * 1 r' 0 2 m o d e l \. 11-8 a DTC Temporary DTC Detectionltem {MlLindication*l P1259t22J VTECSystem l\4alfunction P1291t20\ ElectricalLoad Detector(ELD)CircuitLow Voltaqe P1298(20) ElectricalLoad Detector(ELD)CircuitHiqh Voltaqe P 1 3 6 1( 8 ) P 1 3 6 (28 ) P'r456(90) P1456 (90) P14s7 P1457 P 1 5 0 (51 0 9 ) P1505 (14) P1519 P 1 6 0 7( ) CamshaftPosition(CMP)SensorB (Top DeadCenter (TDC)Sensor)IntermittentSional InterruDtion CamshaftPosition(CMP)Sensor B (Top DeadCenter ( T D C )S e n s o r N ) o Siqnal EvaporativeEmissions(EVAP)ControlSystem Leakaqe(FuelTank Svstem) EvaporativeEmissions(EVAP)ControlSystem Leakaqe(EVAPCanisterSvstem) PositiveCrankcaseVentilation(PCV)Air Leakaqe ldle Air Control(lAC)ValveCircuitMalfunction EnginC e o n t r oM l o d u l e( E C MI)n t e r n aCl i r c u i t Malfunction Page ( s e eD a q e1 1 - 1 2 3 ) ( s e eD a q el 1 - 9 2 ) ( s e eo a o e1 1 - 9 3 ) ( s e ep a g e1 1 - 9 5 ) ( s e ep a g e1 1 - 9 5 ) ( s e ep a g e1 1 - 1 7 5 ) ( s e ep a g e1 ' l - 1 8 0 ) ( s e eo a q e1 1 - 1 6 8 1 { s e ep a q e1 1 - 1 3 1 ) ( s e ep a g e11 - 9 6 ) " : TheseDTCSare indicatedby a blinking MIL when the SCSservicesignal line is jumped with the Honda PGM Tester. 11-9 Fueland EmissionsSystems Symptom TroubleshootingIndex \ When the vehiclehas one of these symptoms,checkthe diagnostictrouble code (DTC)with the scantool. lf there is no DTC,do the diagnosticprocedurefor the symptom, in the sequencelisted,until you find the cause. Svmotom E n g i n ew i l l n o t s t ar t (MlL works OK, no DTCSset) Diaqnostic procedure 1. Testthe battery{seepage 22-50). 2. Testthe starter(seepage 4-8). 3. Troubleshootthe fuel pump circult(seepage 11 141). E n g i n ew i l l n o t s t a r t( M l L comes on and stayson, or n e v e rc o m e so n a t a l l ,n o DTCSset) Enginewill not start (immobilizerindicatorstays on or flashs) Troubleshootthe l\4lLcircuit(seepage 1 Hardstarting (MlLworksOK,no DTCS set) 1. Testthe battery(seepage22-50). 2 . C h e c k t h ef u e l p r e s s u r e( s e ep a g e1 1 - 1 4 5 ) . Coldfast idle too low (MlL works OK. no DTCSset) Coldfast idle too high (MlL works OK, no DTCSset) 1 . D o t h e E C Mi d l e l e a r np r o c e d u r e( s e ep a g e1 1 - 1 3 9 ) . 2 . C h e c k t h ei d l e s D e e d( s e ep a q e1 1 - 1 3 8 ) . ' ] D o t h e E C I \ 4i d l e l e a r np r o c e d u r e( s e ep a g e11 -1 3 9 ) . 2. C h e c k t h ei d l es p e e d{ s e ep a g e1 1 - 1 3 8 ) . '1-'163). the throttlecable (seepage 1 3 . Inspect/adjust Inspectand test the throttle body {seepage 11-160}. ( s e ep a g e1 1 - ' 1 3 9 ) .I n t a k ea i r l e a k s 1 . D o t h e E C Mi d l e l e a r np r o c e d u r e 2 . C h e c kt h e i d l es p e e d( s e ep a g e1 1 - 1 3 8 ) . 3, Inspecvadjustth e throttlecable (seepage 11''163). 4. Insoectand test the throttle bodv (seepaqe 11-160) 1 . D o t h e E C I Vi d I l e l e a r np r o c e d u r e( s e ep a g e11 -1 3 9 ) . Vacuum hose clogged/ cracked/poor 2. TroubleshootthealternatorFRsignalcircuit (see p a g e1 1 - ' 1 3 4 ) . connectron 3. InsDectand test the throttle bodv {seepaqe 11-160). 1 . D o t h e E C Mi d l e l e a r np r o c e d u r e { s e ep a g e1 ' j - 1 3 9 ) . t e a l t e r n a t oFr Rs i g n a lc i r c u i t ( s e e 2 . T r o u b l e s h o ot h p a g e1 1 - 1 3 4 ) . ldle speedfluctuates (MlL works OK, no DTCSset) After warming up, idle speed is below specificationswith no load {MlL works OK, no DTCSset) After warming up, idle speed is above specificationswith no toao (MlL works OK. no DTCSset) Low power (MlL works OK, no DTCSset) E n g i n es t a l l s (MlL works OK. no DTCSset) '1-97). Also check lor Low compressron N o i g n i t i o ns p a r k l n t a k ea i r l e a k s L o c k e du p e n g i n e B r o k e nt i m i n gc h a i n Contaminatedfuel Troubleshootthe immobilizersystem (seepage 22-165). 1 . C h e c kt h e f u e l p r e s s u r e ( s e e p a g e l l - 1 4 5 ) . 2. Inspectand test the th roftle body (seepage 11-160). 3 . I n s p e c v a d j u tsht e t h r o t t l ec a b l e( s e ep a g e1 1 - ' 1 6 3 ) . 1. 2. 3. 4. D o t h e E C Mi d l el e a r np r o c e d u r e( s e ep a g e1 ' l ' 1 3 9 ) . C h e c kt h e f u e l p r e s s u r e { s e e p a g e l l - 1 4 5 ) . C h e c kt h e i d l es p e e d( s e ep a g eI 1 - 1 3 8 ) . Troubleshootthebrakepedal positionswitch signal c i r c u i t( s e ep a q e1 1 - 1 3 7 ) . Low compression I n t a k ea i r l e a k s Contaminatedfuel \- Low compressron C a m s h a ftti m i n g problem E n g i n eo i l l e v e l prootem l n t a k ea i r l e a k s F a u l t yh a r n e s sa n d sensorconnections \- 11-10 Symptom Difficultto refuel (MlL works OK. no DTCSset) Fueloverflowsduring refueling (No DTCSset) Diagnosticprocedure 1 . T e s t t h e f u e lt a n kv a p o rc o n t r o lv a l v e { s e e p a g e1 ' l 2. 1471. I n s p e ctth e f u e lt a n kv a p o rc o n t r o ls i g n a lt u b e 3. betweenthe fuel pipe and the fuel tank vapor control valve. 4. Inspectthe fuel tank vapor vent tube betweenthe EVAPcanisterand the fuel tank vapor control valve. Checkthe EVAPcanister. Replacethe fuel tank vapor control valve (seepage '11 189). Also checktor M a l f u n c t i o n i ngga s s t a t i o nf i l l i n gn o z z l e . Malfunctioninggas stationfilling nozzle. 11-11 Fueland EmissionsSystems SystemDescriptions \ { ElectronicControl System The functionsof the fuel and emlssioncontrol systemsare managedby the enginecontrol module (ECM). Fail-safeFunction When an abnormalityoccursin the signalfrom a sensor,the ECI\4ignoresthat signaland assumesa pre-programmed value for that sensorthat allowsthe enqineto continueto run. Back-up Function When an abnormalityoccursin the ECM,the injectorsare controlledby a back-upcircuitindependentof the systemto p e r m i tm i n i m a ld r i v i n g . Self-diagnosis When an abnormalityoccursin the signalfrom a sensor,the ECM suppliesground for the malfunctionindicatorlamp {MlL) and storesthe diagnostictrouble code {DTC)in erasablememory.When the ignition is first turned on, the EClvl suppliesground to the l\4lLfor 15 to 20 secondsto checkthe M lL bulb condition. Two Driving Cycle Detection Method "two driving cycle detectionmethod" is usedfor some self-diagnostic functions. To preventfalse indications,the When an abnormalityoccurs,the ECM storesit in its memory. When the same abnormalityrecursafterthe ignition s w i t c hi s t u r n e dO F Fa n d O N ( l l )a g a i n ,t h e E C Mt u r n so n t h e M l L . \ \. 11-12 ECMData You can retrievedata from the ECI\4by connectingthe OBD ll scantool or the Honda PGM Testerto the data link connector(DLC).The items listedin the table below conform to SAE recommendedpractice.The HondaPGM Tester also readsdata beyondthat recommendedby SAEto help you find the causesof intermittentproblems. The "operatingvalues" listedare approximateand may vary dependingon the environmentand the individual vehicle. Unlessnoted otherwise,"at idle speed" means idling with the enginecompletelywarmed up in the neutralposition, and the A,/Cand all Diagnostic Trouble Code (DTC} lf the ECM delectsa problem, it will store it as a code consistingof one letterand four numbers.Dependingon the problem,an SAE-definedcode (Poxxx)or a Honda, definedcode {P1xxx)will be output to the tester. l f n o p r o b l e mi s detected,there is no ourpul. YES TheECI\4 computesenginespeedfromthe signalssent N e a r l yt h e s a m ea s position(CKP)sensor.Thisdatais fromthe crankshaft tachometerindication usedfor determining thetimeandamountof injectedfuel. At idle speed; Manifold Absolute Pressure (MAP) The ECMconvertspulsesignalsfrom the vehiclespeed sensor(VSS). N e a r l yt h e s a m ea s speedometer indication The absolutepressurecausedin the intakemanifold by e n g i n el o a da n d s p e e d . Withenginestopped: YES Nearlythe same as almospnencpressure. At idle speed:about 20 4'1kPa ( 1 5 0 3 1 0m m H g , 6 - 1 2 i n . H q ) . 0 . 71 . 3V The ECTsensorconvertscoolanttemperatureinto voltage W i t h c o l d e n g i n e : and signalsthe ECM.The sensor is a thermistorwhose S a m ea s a m b i e n t internalresistancechangeswith coolanttempetature.The temperatureand IAT ECM usesthe voltagesignalsfrom the ECTsensorto With enginewarmed determinethe amount of injectedfuel. u p ; a b o u t1 1 6 2 ' 1 2 " F 1 0 0 ' c ) . 0 . 5 - 0 .v8 Air Fuel Ratio ( A y ' FS)e n s o r . (Sensor1) Secondary Heated Oxygen Sensor (Secondary H02S, Sensor2) The A,/Fsensordetectsthe oxygen content in the exhaust 0.0- 1.25 V g a s a n d s e n d sv o l t a g es i g n a l st o t h e E c l v l ,B a s e d o n t h e s e 8 . 0 1 1 . 0 m A ( P G M signals,the ECMcontrolsthe airlfuel ratio.When the I Tester) oxygen contentis high (that is, when the ratio is leaner At idle speed: than the stoichiometricratio),the voltagesignal is Iower. about 0.1 0.9 V When the oxygencontent is low (that is, when the ralio is richerthan the stoichiometricratio).the voltagesignal is higher.The A'lFsensorsignalsare electricalcurrentthat are indicatedas voltaqe on the The HO2Sdetectsthe oxygen contentin the exhaustgas 0 . 0 1 . 2 5V a n d s e n d sv o l t a g es i g n a l st o t h e E C M .B a s e do n t h e s e At idle speed: signals,the ECMcontrolsthe airlfuel ratio.When the a b o u t0 . 1 0 . 9V oxygen contentis high (that is, when the ratio is leaner than the stoichiometricratio),the voltagesignal is lower. When the oxygen content is low (that is, when the ratio is r i c h e rt h a nt h e s t o i c h i o m e t r irca t i o ) t, h e v o l t a g es i g n a li s NO (cont'd) 11-13 Fueland EmissionsSystems r a SystemDescriptions(cont'd) ECMData(cont'd) Description "open" or "closed". Fuelsystem statusis indicatedas Closed:Basedon the A,/FSensoroutput,the ECM determinesthe airlfuel ratio and controlsthe amount of injectedfuel. Open: lgnoringAy'FSensoroutput,the ECM refersto signalsfrom the throttle position{TP),manifoldabsolute pressure(MAP),intakeair temperature(lAT),barometric pressure(BARO),and enginecoolanttemperature(ECT)) sensorsto controlthe amount of iniectedfuel. The airlfuel ratio correctioncoefficientfor correctingthe Short Term amount of injectedfuel when the fuel system status FuelTrim is "closed." When the ratio is leanerthan the sloichiometricratio,the ECM increasesshort term fuel trim gradually,and the amount of iniectedfuel increases. The airlfuel ratio graduallygets richer,causinga lower oxygen content in the exhaustgas. Consequently,the short term fuel trim is lowered,and the ECM reducesthe amount of injectedfuel. This cvcle keepsthe airlfuelratio closeto the stoichiometricratio when in closedloop status. Long term fuel trim is computedfrom short term fuel trim LongTerm and indicateschangesoccurringin the fuel supply system F u eT l rim over a long period. l f l o n gt e r m f u e lt r l m i s h i g h e rt h a n 1 . 0 0t,h e a m o u n lo f injectedfuel must be increased.lf it is lower than 1.00,the amount of injectedfuel must be reduced. The IAT sensorconvertsintakeair temperatureinto IntakeAir Temperature v o l t a g ea n d s i g n a l st h e E C M .W h e n i n t a k ea i r temperatureis low, the internalresistanceofthe sensor {IAT) increases,and the voltagesignal is higher. Basedon the acceleratorpedal position,the opening Throttle anole of the throttlevalve is indicated. Position lgnitiontiming is the ignition advanceangle set by the lgnition ECM.The ECM matchesignitiontiming to driving Timing conditions. Data FuelSystem Status Calculated L o a dV a l u e (cLV) cLV is the enoine load calculatedfrom IMAPdata. Opera'tingValue At idle speed:closed FreezeData YES o.7 1.5 YES 0.8 1.2 YES w W i t h c o l de n g i n e : S a m ea s a m b i e n t a n dE C T temperature YES At idle speed: a b o u t1 0% At idle speed:8" t 5" | ' t u L w n e nr n e > L ) s e r v i c es i g n a l i n e i s jumped with the Honda PGM Tester At idle speed: 12 34% At 2.500rpm with no toao: 't4- 34% YES NO YES \., 11-14 J/-\ -1\_/ BEIAY2 A/C CLUTCHRELAY I ) RAOIATOR T UNDER.HOOD FUSE/RELAY BOX: (8oA) ONo. 19BATTERY ONo.6 ECU(ECM)(15A1 (3)No.20lG {40A1 {Canada:50A} ONo.l4 OPTION {40A1 €)No.9 BACKuP (7.5A1 lo)No.7 HORN,STOP{15A} UNDER.DASH FUSE/RELAY BOX: ONo. 17FUELPUMP {15A} @No.,t ACG{10A) ONo.1 IGNCOIL(1sA) q)No.10METER (7.5A) 0)No.14A/C CLUTCH RELAY IlOA) @No.2+B LAF(A/F) (2OA) HEATER (cont'd) 11-15 Fueland EmissionsSystems SystemDescriptions(cont'dl a \ ECMElectricalConnections MAPSENSON No. INJECTOR No,2INJECTOR TPSENSOR No.3 INJEC]OB No./tINJECTOF IATSENSOR ECTSENSOB \' CMP SENSORB (TDCSENSOSJ CKPSENSOR F€VERSELOCK SOLENOIDVAIVE \- 11-16 A/FSENSOR EVAPCANISTE6 PURGEVAIVE EVAPCANISTER VENTSHUTVATVE A/FSENSOR (sENSOn 1) sotENotovAtvE CMP SENSOFA VIC OIL CONTROL SO!ENOIDVALVE No. 1 IGNITIONCOIL wEcorl N o . 2 l G N l l l O NC O I L No. 3 IGNITIONCOIL PRESSUSESWTICH VTEC SOLENOID No. a IGNITIONCOIL {cont'd) 11-17 Fueland EmissionsSystems SystemDescriptions(cont'd) \ ECMElectricalConnections ARAKEPEDAL POStTtONSWTTCH GAUGEASSEMBLY IMMOBILPENUN|T \ EPSCONTROTUNIT TERMINALLOCATIONS \- 11-18 ECMInputsand Outputsat ConnectorA (31P) 2 1 AFS]TC ]GP2 '10 SG2 t1 3 IGPl ^:^ I -:, 12 ACV 22 23 HTC+ LG2 6 AFS+ 15 T6 TPS AFS_ 26 25 CMPB CMPA(rDc) I KS 1 CKP 18 1 9 2A V S S IVAP vcc2 21 vccl 27 28 29 30 tGPts,lrcPts3tGPts2GPLS 1 Wire side ol femaleterminals NOTE:Standardbatteryvoltageis 12V. Terminal Who color numb€r ELKAVHT forminal name 2 YEUBLK AFSHTC(AIRFUELRATIO (4./F)SENSOR HEATER CONTROL} IGP2(POWEB SOURCE) 3 YEUBLK IGPl {POWER SOURCE) 4 5 6 1 9 10 12 18 PG2(POWER GROUND PG1(POWER GROUND AFS+ (AIRFUELRATIO (A,/F}SENSOR, SENSOR1 + stDE) 8LU CKP(CRANKSHAFT POSITION SENSOR) BED/BLU ) KS E N S O B ) YEL 2 {SENSOR; R O U N D ) G 1{ S E N S O R ;ROUND) BLIVRED IACV(IDLEAIRCONTROL (IAC)VALVE) RED/BLK TPS(THROTTLE POSITION SENSOR) REDI/EL AFS (AIRFUELRATIO (4,/F)SENSOR, SENSOB1 SIDE) WHT/GRN V S S ( V E H I C L ES P E E D BLK BLK RED SENSOR) Description Signal DrivesAy'Fsensorheater Withignit'onswitchON {ll):batteryvoltage Withfullywarmedup enginerunnang: 0V Powersourcefor the ECM circuit Powersourcefor the ECM Withthe ignitionswitchON 1ll):batteryvoltage Withthe ionitionswitchOFF:about0 V Withthe ignitionswatch ON {ll):batteryvoltage Withthe ionitionswitchOFF:about0 V Lessthan 1.0V at all times Lessthan 1.0V at all times Groundforthe ECMcircuit Groundforthe ECMcircuit DetectsAy'Fsensor {sensor1)signal Detects CKPsensorsignal Withenginerunning:pulses Detectsknocksensorsiqnal Sensorqrounr Sensorqroun( DrivesIACvalve pulses Withenqineknocking: Lessthan1.0Vat elltimes L e s s t h a 1n . 0 Va t a l l t i m e s Withenginerunningrdutycontrolled Detects TPsensorsignal Withthrottlefullyopen:about4.8V Withthronlefullvclosed:ahout0-5V Detects!y'Fsensor ( s e n s o1r) s i g n a l Detects VSSsignal WathignitionswitchON (lli andfrontwheels rotating: cyclesfrom about0 V to about5 V or (cont'd) 11-19 Fueland EmissionsSystems \. il SystemDescriptions{cont'd) ECMInputsand Outputsat ConnectorA (31P) 1 AFS]TC 2 GP2 3 IGPl 4 PG2 12 10 11 SG2 sG1 IACV 22 23 AFS LG2 HTC+ 5 6 PG.1 AFS+ '15 1 6 TPS AFS_ 26 25 CMPB Ct\.4PA (rDc) I KS 1 CKP 18 1 9 20 V S S IVAP vcc2 21 vccl 29 30 27 28 IGPLS,I IGPLS4 IGPLS3 IGPLS2 Wire side of femaleterminals NOTE:Standard batteryvoltageis 12V. [€rminal namo Description Jorminal Wirecolor number 19 DetectsMAPsensorsignal GRN/RED MAP(MANIFOLD PRESSURE ABSOLUTE SENSOR) YEUBLU VCC2(SENSOR VOLTAGE) P r o v i d e ss e n s o r v o l t a g e 20 21 YEURED VCC](SENSOB VOLTAGE) Provides sensorvoltage 22 AFSHTC- (AIRFUEL Detectsa,/Fsensorheater RATIO(A"iFiSENSOR voltage + SIDE) HEATER CONTROL BRN?ryE L LG2(LOGIC GROUND roundfor the ECMcircu 1(L roundfor the ECMcircu BRN?ryE L D e t e c t sC M P s e n s o r A BLU,^/VHT CMPA (CAMSHAFT A) stonal POSITION SENSOR Detects GRN CMPB CAMSHAFT CMPsensor8 (TDc (CMP)SENSOB sensor) POSITION B (TDC(TOPDEADCENTER SENSORi) I G P L S 4{ N o .4 I G N I T I O N DrivesNo, 4 ignitioncoi BRN 23 24 25 26 27 COILPULSE) I G P L S 3{ N o . 3 I G N I T I O N COILPULSE) 28 WHT/BLU 29 GNITION BLU/RED l G P L S 2 l N o .I 2 COILPTJLSE) YEUGRN IGPLSI(No.1 IGNITION co PlltsF) 30 Signal With ignitionswitchON (ll):about3 V A t i d l e : a b o u t 1 . 0V ( d e p e n d i n go n e n g i n e s p e e d ) With ignitionswitchON {ll):about5 V WithionitionswitchOFF:about0V WithignitionswitchON {ll):about5 V With ionitionswitchOFF:about0V W i t h i g n ; t i o ns w i t c h O N l l l ) : b a n e r y v o l t a g e \. Lessthan1.0V at alltimes L e s st h a n '1.0 V at alltimes Withenginerunning:pulses Withenginerunning:pulses WithignitionswitchON (ll)rabout0 v Withenginerunning:pulses O r i v e s N o . 3 r g n i t i o nc o i DrivesNo.2 ignitioncoil DrivesNo. I ignitioncoil \. 11-20 a a Wire side o{ femaleterminals NOTE:Standardbafteryvoltageis 12V. Terminal numo€t Wirecolor [erminal name Description BLUAvHT VTC+ lVTCOILCONTBOL DrivesVTCoilcontrol 2 3 4 5 6 7 8 9 10 '17 18 21 23 VALVE+SIDE) SOLENOID lNJa{No.4INJECTOR) Jo.3INJECTORI BL )TOR) R1 lNJl 1No.I INJECTOR) BRN FAN FANC(RAOIATOR GRN CONTROL) LOCK GRN/vVHT RVS(REVERSE VALVE) SOLENOID Drives o. 4 iniector Drives o.3 iniector Drives o . 2 i n i e c t o r DrivesNo. 1 iniector Drivesradiatorfan relay Signal WithignitionswitchON (ll):0 V At idle:dutycontrolled With radiatorfan running:about0 V With radiatorfan stopped:battervvoltaoe Drivesreverselocksolenoid Withvehiclespeedbelow9.4mph (15km/h): batteryvoltage Withvehiclespeedabove12.5mph (20km/h):0 V Withthe ignitionswitchON (ll):about0.1 4.8V DetectsECTsensorsignal COOLANT REDAVHT ECT(ENGINE ideoendino on enoinecoolanttemDerature) TFMPFRATURE SENSOR) VTEcoil pressure Withengineat low enginespeed:about0 . Detects BLU/BLK VTPSW(VTECOIL Wirhenoineat hiohenoinesoeed:battervvoltaqe PRFSSTIRF SWITCH) switch sional L signal With ignitionswit'chON (ll):about0 V L Detects alternator WHT/BLU ALTL(ALTEBNATOR Whh enoinerunnino:battervvoltaqe SIGNAII FBsignal Withenginerunning:about0 V- 5 V FR Deteclsalternator WHT/RED ALTF(ALTERNATOR load) on electrical S I GN A L I {deoendinq DrivesVIECsolenoidvalve A t i d l e : a b o u t 0 V GRN/YEL VTS {VTECSOLENOID With ignitionswitchON {ll):about0.1V 4.8v l.lcnen.iino on intakeairtemoerature) Withenginerunning:about0 V 5 V control Sendsalternator (.lcocn.lino on electrical ioad) purge Withenginerunning,enginecoolantbelow149'F DrivesEVAPcanister batteryvoltage valve 165'C): Withenginerunning,enginecoolantabove149'F 165"C): dutvcontrolled W i t h t h e i g n i t i o n s w i t c h O N ( l l ) :0 V BLK/Vr'HT VTC (VTCOILCONTROL DrivesVTCoilcontrol SOIFNOIDVALVE SIDE) IAT(INTAKE AIR TEMPERATURE SENSOR) WHT/GRN ALTC(ALTERNATOR CONTROL) YEUBLU PCS{EVAPORATIVE EMISSION CANISTER PURGE VALVE) REDI/EL DetectsIATsensorsignal (confd) 11-21 Fueland EmissionsSystems L SystemDescriptions(cont'dl ECMlnputsand Outputsat ConnectorE (31P} 1 iMo FPR 2 3 sr-{]zsLG3 22 23 24 BKSWK-LINESEFMJ 6 1 $1025 MRLY HTC 16 14 15 18 FTP ELD EPS ACC LD 21 26 rMo NEP CD 8 AFS HTCR 4 SG3 I 20 21 Z/VBS VSV 29 scs 30 31 WEN MIL Wire side of femaleterminals NOTE:Standardbatteryvoltageis '12V. Terminal Wire color number GRNI/EL 2 3 4 5 6 1 (SECONDARY Drivessecondary BLKATr'HT SO25HTC HO2S HEATED OXYGENSENSOR heater (SECONDARY H02S) HEATER CONTROL) REDA/EL MRLY(PGM.FI MAIN DrivesPGM-Flmain relay1 RELAY} Powersourceforthe DTC ORN I YEUBLK '18 Description IMOFPR(IMMOBILIZER D r i v e s P G M F l m a i n r e l a y 2 FLJEL PUMPRELAYI WHT/RED SHO2S(SECONDARY DetectssecondaryHO2S HEATED OXYGENSENSOR {sensor2) signal (SECONDARY HO2S), SENSOR 2r BRN/YEL LG3(LOGIC GROUND) cround forthe ECM/PCM controlcircuit PNK SG3{SENSOR GBOUND) Sensororound YEUELU VCC3{SENSOR VOLTAGE) Providessensorvoltage I 't4 ferminal name LT GRN 0Vfor2 secondsafterturningignitionswitchON {ll).then battervvoltaoe WiththrottleJullyopenedfrom idlewith fully warmedup engine:above0.6V Withthrottlequicklyclosed:below0.4V Lessthan1.0V at all times Lessthan 1.0V at all times With ignitionswitchON (ll):about5 V With ionitionswitchOFF:about0 V With ignitionswitch ON (ll):bafteryvoltage Wilh fullvwarmedup enginerunning:dul, controlled WithignitionswirchON {ll):0 V IGl (IGNITION SIGNAL) With ignition switch ON (ll): battery voltage With iqnition switch OFF: about 0 V D e t e c r si g n i t i o n s i g n a l u WithignitionswitchON (ll):about0 V With ignitionswitchOFF:batteryvoltage AFSHTCR {AIRFUELBATIO Drivesairfuel ratiosensor (Iy'F)SENSOR HEATER heaterrelay CONTROLRELAY) FIP lFUELTANK (FTP)SENSOR) PRESSURE GRN/RED ELD(ELECTRICAL LOAD DETECTOF) LTGRN/8LK EPSLD(ELECIRICAL POWEBSTEEBING LOAD DETECT) RED Signal WithignitionswitchON (ll)andfuelfill capopen: about2.5V DetectsELDsignal WithignitionswjtchON itt):aOoutO.t V l-gV (deDendino on electrical load) DetectsPowersteeringload At idlewith steeringwheelin straightahead srgnal position:about0 V At idlewith steeringwheelatfulllock:momentary DetectsFTPsensorsignal ACC(Ay'C CLUTCH RELAY) DrivesP,/Cclutch relay Withcompressor ON:about0 V With comoressorOFF:battervvoltaoe \- 11-22 ECMInputsand Outputsat ConnectorE (31P) l 2 t M o $.c2s FPR 14 FTP 22 23 24 BKSWK LINESEFMJ I AFS HTCR 6 1 SFIO2S IV RLY HTC i 15 ELD 16 EPS LD 26 NEP 21 20 2,4/BS VSV t8 21 lvo CD 9 tGl 29 scs 30 31 WEN MIL Wire side of femaleterminals NOTE:Standardbatteryvoltageis 12V. Terminal Wire color 20 21 22 23 21 29 Description BLU/RED 2WBS(EVAPORATIVE DrivesEVAPbypass (EVAP)BYPASSsolenoidvalve EMISSION SOLENOID VALVE) DrivesEVAPcanistervent LT GRN/RED VSV (EVAPORATIVE shutvalve EI\4ISSION iEVAP) VENTSHUT CANISTEB VALVE) Detects brake pedal WHT/BLK BKSWlBRAKEPEDAL POSITION SWITCH) o o s i t i o ns w i t c h s i o n a l scan LT BLU K-LIN E Sendsand receives YEL 26 Terminalname SEFMJ N E P( E N G I NSEP E E D PULSE) RED/BLU \40CDfl\4MOBTLTZER CODE) BRN S C S ( S E R V I C EC H E C K BLU ENABLE RED,A/VHT WEN(WRITE SIGNALi GRN/ORN MIL(MALFUNCTION LAMP) INDICATOR WithignitionswitchON (ll):bafteryvoltage W i t h i g n i l i o n s w i t c h O N ( l l ) :b a t t e r y v o l t a g e With brakepedalreleased: about0 V With hrake nedal nresse.l: batterv voltaoe With ignitionswitchON (li)rpulsesor battery With ignitionswitchON (ll):about5 V Withenoinerunninounderload:DUlses Outputsenginespeedpulse Withenginerunning:pulses C o m m u n i c a t e sw i t h mrltinleYeontrolunit D e t e c t si m r n o b i l i z e rs i g n a l checksignalshortedwith the PGM O e t e c t ss e r v i c ec h e c k s i g n a l Withthe service Tester:about0 V Wiih rheservicechecksionalooened:about5 V SIGNAL) 30 Signal D e t e c t sw r i t e e n a b l e s i g n a l W i t h i g n i t i o n s w i t c h O N ( l l ) :a b o u t 0 V DrivesN4lL WithMILturnedON:about0 V WithMILturnedOFF:battervvoltaqe (cont'd) 11-23 Fueland EmissionsSystems ! SystemDescriptions(cont'dl VacuumHoseRouting INTAKEAIR BYPASSCONTROL THERMALVALVE \* FRONTOF VEHICLE EVAPORATIVEEMISSION {EVAP}CANISTERPURGEVALVE \, 11-24 VacuumHoseRouting I 1} {SENSOR O AIRFUELRATIOIA/F)SENSOR HEATED OXYGENSENSOR O SECONDARY 2} HO2S}{SENSOR ISECONDARY (MAPISENSOR PRESSURE ABSOLUTE O MANIFOLD {ECT)SENSOR O ENGINECOOLANTTEMPERATURE (IAT)SENSOR O INTAKEAIRTEMPERATURE (CKP)SENSOR POSITION O CRANKSHAFT O KNOCKSENSOR (CMPISENSOR B POSITION O CAMSHAFT ITDC)SENSOR) ITOPDEADCENTER A POSITION O CAMSHAFT ICMPISENSOR (IACIVALVE @ IDLEAIRCONTROL O THRONLEBODY .OINJECTOR OAMPER @ FUELPULSATION [I FUELFILTER REGULATOR @ FUELPRESSURE @ FUELPUMP @ FUELTANK @ RESONATOR (9 AIRCLEANER VENTILATION{PCVIVALVE @ POSITIVECRANKCASE CONVERTER WAYCATALYTIC @ THREE EMISSION {EVAPICANISTER @ EVAPORATIVE EMISSION {EVAP)CANISTER @ EVAPORATIVE PURGE VALVE (EVAPICANISTER EMISSION {} EVAPORATIVE VENTSHUTVALVE EMISSION {EVAP)TWOWAYVALVE {' EVAPORATIVE EMISSION IEVAPIBYPASS @ EVAPORATIVE VALVE SOLENOID (FTP)SENSOR @ FUELTANKPRESSURE EMISSION IEVAP}VALVE @ EVAPORATIVE VALVE @ FUELTANKVAPORCONTROL VALVE 60)FUELTANKVAPORRECIRCULATION VALVE THERMAL CONTROL O INTAKEAIRBYPASS (cont'd) 11-25 Fueland EmissionsSystems SystemDescriptions(cont'd) PGM-FISystem The ProgrammedFuel Injection(PGM-Fl)system is a sequentialmultiport fuel injectionsystem. CamshaftPosition(CMPISensorB (TopDeadCenter (TDCISensor) TheCMPsensorB (TDCsensor)detectsthe positionof the No.1 cylinderasa reference for sequential fuel injectionto eachcylinder. Air Conditioning {A/C) Compressor Glutch Relay When the ECfMreceivesa demandfor coolingfrom the Ay'Csystem,it delaysthe compressorfrom being energized,and enrichesthe mixture to assuresmooth transitionto the AVCmode. Air Fuel Ratio lA/Fl Sensor The Ay'FSensoroperatesover a wide airlfuel range.The Ay'FSensoris installedupstreamof the TWC, and sends signalsto the ECMwhich variesthe durationof fuel injectionaccordingly. ztRcoNta ELEMENT HEATER MAGNET SENSOR TERMINALS Crankshaft Position (CKPISensor The CKPsensordetectscrankshaftsoeedand determinesignitiontiming and timing for fuel injection of each cylinderas well as detectingengine misfire. HEATER TERMINALS Barometric Pressure {BAROI Sensor The BAROsensoris insidethe ECM.lt convens atmosphericpressureinto a voltagesignalthat the ECM usesto modify the basicdurationof the fuel injection discharge. Engine Coolant Temperature (ECT)Sensor The ECTsensoris a temperaturedependentresistor (thermistor).The resistanceof the thermistordecreases as the enginecoolanttemperatureincreases. TERMINAL \, 11-26 lgnition Timing Control The ECMcontainsthe memory for basicignitiontiming at variousengine speedsand manifold absolute pressure.lt also adjuststhe timing accordingto engine coolanttemperature. Iniector Timing and Duration The ECM containsthe memory for basicdischarge d u r a t i o na t v a r i o u se n g i n es p e e d sa n d m a n i f o l d pressures.The basicdischargeduration,after being read out from the memory, is further modified by signalssent from varioussensorsto obtain the final d i s c h a r g ed u r a t i o n . By monitoring long term fuel trim, the ECMdetectslong term malfunctionsin the fuel systemand sets a DiagnosticTrouble Code{DTC). Intake Air Temperature (lAT) Sensor The IAT sensoris a temperaturedependentresistor {thermistor).The resistanceof the thermistor decreases as the intakeair temDeratureincreases. MalfunctionIndicatorLamp lMlLl Indication{ln relation to ReadinessCodes) "readinesscodes" that are part The vehiclehas certain of the on-boarddiagnosticsfor the emissionssystems. lf the vehicle'sbafteryhas been disconnectedor gone dead.if the DTCShave been cleared,or if the ECM has been reset.these codesare set to incomplete.In some states,part of the emissionstesting is to make sure these codes are set to comDlete.lf all of them are not set to complete,the vehiclemay fail the test and the test cannot be finished. To checkif the readinesscodes are set to complete, turn the ignition switch ON (ll). but do not startthe e n g i n e . T h e M I L w ci lol m e o n f o r l S 2 0 s e c o n d sl f. i t then goes off, the readinesscodesare set to complete, lf it blinksseveraltimes,one or more readinesscodes are not set to comolete.To set each code, drive the v e h i c l eo r r u n t h e e n g i n ea s d e s c r i b e di n t h e proceduresto set them in this section(seepage 11-46). Manifold Absolute Pressure {MAP) Senso] The MAP sensorconvertsmanifoldabsolutepressure i n t oe l e c t r i c asl i g n a l st o t h e E C M . SENSOR UNIT Knock Sensor The knockcontrol system adjuststhe ignitiontiming to minimizeknock. PIEZO CERAMIC (cont'd) 11-27 Fueland EmissionsSystems SystemDescriptions(cont'dl Secondary Heated Oxygen Sensor (Secondary HO2S) The secondaryHO2Sdetectsthe oxygen content in the exhaustgas downstreamof the three way catalytic converter(TWC)and sendssignalsto the ECMwhich checksthe efficiencyof the TWC.To stabilizeits output, the sensorhas an internalheater.The secondarvHO2S i s i n s t a l l e di n t h e T W C . ( Vehicle Speed Sensor (VSS) The VSS is driven by the differential.lt generatesa pulsedsignalfrom an input of 5 volts.The number of pulsesper minute increases/decreases with the speed of the vehicle. BEARING SENSOR TERMINALS ztRcoNta ELEMENT HEATER TERMINALS Starting Control When the engine is started,the ECM providesa rich mixture by increasinginjectorduration. ( Throttle Position ITP)Sensor The TP sensoris a potentiometerconnectedto the throttlevalve shaft.As the throttle positionchanges,the sensorvariesthe signalvoltageto the ECM.The TP sensoris not replaceableapart from the throftle body. ELEMENT BRUSHHOLDER gRUSH ( 11-28 wEc/wc The i-WEC has a VTC (VariableValveTiming Control)mechanismon the intakecamshaftin additionto the usual VTEC. This mechanismimprovesfuel efficiencyand reducesexhaustemissionsat all Ievelsof engine speed,vehiclespeed. a n d e n g i n el o a d . The VTECmechanismchangesthe valve lift and timing by using more than one cam profile. The VTCchangesthe phaseof the intakecamshaftvia oil pressure.lt changesthe intakevalve timing continuously. HIGH i LOW<- ENGINESPEED DrivinoCondition Qr Light-load VTC Control B a s eP o s i t i o n ?l M edium/high-load AdvanceControl €) High speed Advance-BasePosition DescriDtion Cam angle is retardedto reducethe entry of exhaust gas into the intakeport and to achievestablefuel c o n s u m D t i o dn u r i n ql e a nb ur n . Cam angle is advancedfor EGReffectand to reduce this pumping loss.The intakevalve is closedquickly to help reducethe entry of airlfuel mixture into the intakeport and improve the chargingeffect. C a m p h a s ea n g l ei s c o n t r o l l e df o r o p t i m u mv a l v e t i m i n qa n d m a x i m u me n o i n eo o w e r . {cont'd) 11-29 Fueland EmissionsSystems SystemDescriptions(cont'dl ( VTC system . The VTC system makescontinuousintakevalvetiming changesbasedon operatingconditions. . Intakevalve timing is optimizedto allow the engineto producemaximum power. 'CamangleisadvancedtoobtaintheEGReffectandreducethepumpingloss.Theintakevalveisclosedquicklyto reducethe entry of the airlfuel mixture into the intakeport and improvethe chargingeffect. . Cam angle is reducedat idle to stabilizecombustionand reducesenginespeed. ' l f a m a l f u n c t i o n o c c u r s , t h e V T C s y s t e m c o n t r iosl d i s a b l e da n dt h e v a l v et i m i n g i s f i x e da t t h e f u l l y r e t a r d e dp o s i t i o n . TDC MAXIMUM VTCADVANCE50' MAXIMUM VTC ADVANCE50' i l(-4 '+-|l sHoRToVERLAP LoNGoVERLAP VTEC system ' The VTECsystemchangesthe cam profileto correspondto enginespeed.lt maximizestorque at low enginespeed and output at high engine speed. . The low lift cam is used at low engine speeds,and the high lift cam is used at high enginespeeds. LOWSPEEDVALVETIMING 11-30 HIGHSPEEDVALVETIMING System Diagram CMPSENSORA From No. il ACC{10A)fuse INTAKE CAMSHAFT BRN/YEL -:- BLU/WHT BLU/WHT VARIOUS SENSORS BLK/WHT GRN/YEL BLU/BLK BLK It :5i.T,"" Camshaft Position {CMP}Sensor The CMP sensordetectscamshaftangle positionfor the VTC system. {cont'd} 11-31 Fueland EmissionsSystems ( SystemDescriptions(cont'd) ldle Control System FuelSupply System When the engine is cold, the Ay'Ccompressoris on, the transmissionis in gear,the brakepedal is pressed.the power steeringload is high, or the alternatoris charging,the ECIMcontrolscurrentto the ldle Air Control(lAC)valveto maintainthe correctidle speed. Referto the System Diagramto seethe functional layout of the system. Fuel Cut-off Control Duringdecelerationwith the throttle valve closed, currentto the injectorsis cut off to improve fuel economy at enginespeedsover 1,030rpm. Fuelcut-off actionalso occurswhen enginespeedexceeds 6,900rpm, regardlessof the positionof the throttle valve,to protectthe enginefrom over-rewing. When the vehicleis stopped.the ECMcuts the fuel at engine speedsover 6,500rpm. Brake Pedal Position Switch The brakepedal positionswitch signalsthe ECMwhen the brakepedal is oressed. Electrical Power Steering (EPS)Senser The EPSsensorsignalsthe ECMwhen the power s t e e r i n gl o a di s h i g h . ldle Air Control llACl Valve To maintainthe proper idle speed,the IACvalve changesthe amount of air bypassingthe throttle body in responseto an electricalsignalfrom the ECM. From AIR CLEANER IAC VALVE 11-32 To INTAKE MANIFOLD Fuel Pump Control When the ignition is turned on, the ECMgroundsthe PGM-Flmain relay which feeds currentto the fuel pump for 2 secondsto pressurizethe fuel system,With the e n g i n er u n n i n gt.h e E C Mg r o u n d st h e P G M - Fm l ain relay and feeds currentto the fuel pump. When the engine is not running and the ignition is on, the ECI\4 cuts ground to the PGM-Flmain relaywhich cuts currentto the fuel pump. PGM-FIMain Relay1 and 2 The PGM-Flmain relay consistsof two separaterelays. Relay1 is energizedwheneverthe ignition switch is ON (ll)to supply batteryvoltageto the ECM power to the injectors,and power for relay,Relay2 is energizedto supply power to the fuel pump for 2 secondswhen the i g n i t i o ns w i t c hi s t u r n e dO N ( l l ) ,a n d w h e n t h e e n g i n ei s runnrng. { IntakeAir System Referto the SystemDiagramto seethe functional layout of the system. Throttle Body The throttle body is a single-barrelside draft type. lt housesthe TP senserand the IACvalve.The lower portion of the IAC valve is heatedby enginecoolant f r o m t h e c y l i n d e rh e a d . Intake Air Bypass Control Thermal Valve W h e nt h e e n g i n ei s r u n n i n g t, h e i n t a k ea i r b y p a s s controlthermal valve sendsair to the iniectors, IACVALVE INJECTOR {cont'd) 11-33 Fueland EmissionsSystems SystemDescriptions(cont'dl { GatalyticConverterSystem PositiveCrankcaseVentilation (PCVISystem ThreeWay CatalyticConverter(TWC) (HC),carbon TheTWCconvertshydrocarbons monoxide{CO),andoxidesof nitrogen(NOx)in the exhaustgasto carbondioxide(C02),dinitrogen(N2), andwatervaDor. The PCVvalve preventsblow-by gassesfrom escaping into the atmosphereby ventingthem into the intake manifold. BREATHERPIPE THREEWAY CATALYST FRONTOF VEHICLE :: €: BLOW-BY VAPOR FRESH AIR \ 11-34 Evaporative Emission(EVAPIControl System Referto the SystemDiagramto see the functional layout of the system. EVAPCanister The EVAPcanistertemporarilystoresfuel vapor from the fuel tank until it can be purged back into the engine a n db u r n e d . EVAP Canister Purge Valve When the enginecoolanttemperature is below 149'F (65'C),the ECMturns off the EVAPcanisterpurge valve which cuts vacuum to the EVAPcanister. EVAP Two Way Valve and EVAP Eyp8s Solenoid Valve The EVAPtwo way valve is installedbetweenthe fuel tank and the EVAPcanisterline. The EVAPtwo way valve sendsfuel vapor to the EVAP canistercorrespondingto the pressureinsidethe tuel tank. lt also relievesexcessvacuum in the tank by allowingfresh air to be drawn into the tank through the EVAPcanister. The EVAPbypasssolenoidvalve opensto bypassthe two way valve during the EVAPleakcheck. EVAP BYPASS SOLENOID VALVE FuelTank Pressure (FTP)Sensor The FTPsensorconvertsfueltank absolutepressure into an electricalinputto the ECMduring the EVAPleak cnecK. VALVE SENSOR UNIT To FUELTANK (cont'd) 11-35 Fueland EmissionsSystems SystemDescriptions(cont'dl \ ldle Control System Diagram The idle speedof the engine is controlledby the ldle Air Control(lAC)varve: 'Aftertheenginestarts,theIACvalveopensforacertainamountoftime.Theamountofairisincreasedtoraisethe i d l es D e e d . . When the engine coolanttemperatureis low, the IACvalve is openedto obtain the properfast idle speed.The amount of bypassedair is controlledin relationto enginecoolanttemperature. INTAKE MANIFOLD IACVALVE AKEAIR DUCT CLEANER YEL/BLK ---< From PGM.FI MAIN RELAY BLK/ REO THROTTLEAODY VARIOUS SENSOnS BLK IntakeAir SystemDiagram This systemsuppliesair for engine needs.A resonatorin the intakeair pipe providesadditionalsilencingas air is drawn into the svstem. THROTTLEAODY VARIOUS SENSORS BLK I 11-36 { Evaporative Emission(EVAPIControlDiagram The EVAPcontrolsminimizethe amount of fuel vapor escapingto the atmosphere.Vapor from the fuel tanKrs temporarilystoredin the EVAPcanisteruntil it can be purgedfrom the canisterinto the engine and burneo. . The EVAPcanisteris purged by drawing fresh air through it and into a port on the intakemanifold. The purgingvacuum is controlledby the EVAPcanisterpurge valve,which operateswheneverengine cootant temperatureis above 149'F(65"C). 'WhenvaporpressureinthefueltankishigherthanthesetvalueoftheEVAPtwowayvalve,thevalveopensan regulatesthe flow of fuel vapor to the EVAPcanister. ' D u r i n g r e f u e l i n g , t h e f u e l t a n k v a p o r c o n t rvoal l v eo p e n sw i t h t h e p r e s s u r ei n t h e f u e lt a n k ,a n d f e e d st h e f u e lv a D o r to the EVAPcanister. FUELTANK VAPOR RECIRCULATION VALVE FUELTANK VAPOR SIGNAL TUBE BLU/RED BLK FUELFILLCAP FUELTANK VAPOR RECIRCULATION TUBE EVAP + CANISTER VENTSHUT VALVE From BLK/YEL --<No. 4 Acc FUELTANK { 1 0A } f u s e EVAP CANISTER EVAPTWOWAY VALVE (cont'd) 11-37 Fueland EmissionsSystems I SystemDescriptions(cont'd) ECM Circuit Diagram CONNECTOi mrrrrn a CMP SENSORB (TDCSENSOn) I-BRN/YEr- \, 11-38 a wEc solENorD _YEL/aLU -RED/aLK |-GFN/YEL I __f -----l _l F=-1 Hi I t_r I I?SCNSOn + L!l I I I Y croz ff:l_l *'*"_-ll-t -KnocK lSENSOn l I -l- Ll] wcoLcoNTnoL SoLENO|OVAIVE (cont'd) 11-39 Fueland EmissionsSystems SystemDescriptions(cont'dl \ ECMCircuitDiagram{cont'd) -{ffi] ---1t-| IATSENSOR -{El ------l ECTSENSOS T_""",,.. I-BFN/YEL CMPSENSOAA L- IJUNCTION I CONNECTOR - ft^--l , " , " . , J | t -' : I I I + t!j]] 11-40 REVERSE LocK soleloto vaLvE _1ffi1 -'----1 | |Fahdl G8N t '--r- I , '8r-K-L-| | T l -r l l HcoNNEcroR BLU/ -l J.L9l | .lurcrroru F EVAPCANISTEB ALK/YEL WHT/ALU WHT/NED WHI/GRN JUNCTION CONNECTOR rrrn tcM PLUG N o . 2 I G N I T I O NC O l t PLUG No.3IGNITION COIL (cont'd) 11-41 Fueland EmissionsSystems a SystemDescriptions(cont'd) ECMCircuitDiagramlcont'dl YEI/BLK IGP2 VET/BLK ---rF-rl -lF-forl --JliD\l --t-l a MAIN BETAV2 t_,", :t l-,r'l r, -,u- f-"'*'o"" I SENSOS tr IMMOAIL|zERUNIT a 11-42 SECONDAFY H02S (s€NsoR2l m tlil TPS€NSOR '--{=l -{r I CANISTERVEAIT SHUTVALVE t-_] --lti l EVAP EYPASS solENorD To€PS CONTROLUNIT CPU GAUGE ASSEMBTY (cont'd) 11-43 Fueland EmissionsSystems SystemDescriptions(cont'dl L ECMCircuitDiagram(cont'd) UNDER.HOOD FUSE/RELAY9OX ! CONN€CTOF CONNECTOi WHI/NED BLK/YET lalLREllY_ _l a 11-44 CONNECTOR E ""rr"a*J r''lHr/cnN 1 I CONNECTOiK IGNITIONSWITCH lG2 ' I CONNECTOFJ /GRN TEST TACHOMETER CONNECTO8 UNDER.HOOD UNDER.DASH FUSE/FELAYBOX UNDER.DASH FUSE/RELAY BOX: 4 ACG (1oAt 1 tGN CO|Lt15A) 2 A/F HEATER{2OA) 17 FUELPUMPI15A} 1OMETER{7.5AI 14 A/C CLUTCHRELAY{1OA} POStTtONSWTTCH ,or"-9J3{51 "_.rl re* _{F Brake pedal pressed: closed Brake pedal releasedropen 11-45 Fueland EmissionsSystems How to Set ReadinessCodes L MalfunctionlndicatorLamp(MlL)Indication (ln relationto Readiness Codesl CatalyticConverterMonitorand Readiness Code The vehiclehas certain"readinesscodes" that are part of the on-boarddiagnosticsfor the emissionssystems. lf the vehicle'sbatteryhas beendisconnectedor gone dead,if the DTCShave beencleared,or if the ECM has been reset,these codesare set to incomplete.In some states,part of the emissiontesting is to make sure these codesare set to complete.lf all of them are not set to complete,the vehiclemay fail the emissiontest, or the test cannot be finished. NOTE: . Do not turn the ignition switch off during the procedure. . All readinesscodes are clearedwhen the batteryis disconnectedor when the ECM is clearedwith the OBD ll scantool or HondaPGlvlTester. . Low ambienttemperaturesor excessiveslop-and-go traffic may increasethe drive time neededto switch the readinesscode from incompleteto complete. ' The readinesscode will not switchto com Dleteuntil a l l t h e e n a b l ec r i t e r i aa r e m e t . . lf a fault in the secondaryHO2Ssystemcausedthe MIL to come on. the readinesscode cannot be set to comDleteuntil vou correctthe fault. To checkifthe readinesscodesare complete,turn the ignitionswitch ON (ll), but do not startthe engine.The MIL will come on for 15 20 seconds.lf it then goes off, the readinesscodesare complete.lf it blinksseveral times, one or more readinesscodes are not complete. To set readlnesscodesfrom incompleteto complete. do the procedurefor the appropriatecode. EnableCriteria . E C Ta t 1 5 8 " F( 7 0 ' C )o r h i g h e r . . I n t a k ea i r t e m p e r a t u r e ( l A T )a t 2 0 " F( - 7 ' C ) o r h i g h e r . . Vehiclespeed is steady,and vehiclespeedsensor ( V S S )r e a d sm o r et h e n 2 5 m p h ( 1 3 k m / h ) . Procedure 1 . C o n n e ctth e s c a nt o o l t o t h e v e h i c l e ' sd a t al i n k c o n n e c t o(rD L C i a, n d b r i n gu p t h e t o o l ' sg e n e r i c O B Dl l m o d e . 2 . Startthe engine. 3 . Test-drivethe vehicleunder stop-and-goconditions with short periodsof steadycruise.After about 5 miles (3 km),the readinesscode should switch from incompleteto complete. lf the readinesscode is still set to incomplete,check for a temporary DTC.lf there is no DTC,one or more of the enablecrlteriawere probablynot met; 11-46 \ \" EvaporativeEmissions(EVAP)Control SystemMonitor and Readinesscode Air FuelRatio(A/FlSensorMonitorand Readiness Code NOTE: NOTE: . Do not turn the ignitionswitch off during the orocedure. . All readinesscodesare clearedwhen the bafteryis disconnectedor when the ECM is clearedwith the OBD ll scantool or Honda PGM Tester. All readinesscode are clearedwhen the batterVis disconnectedor when the ECM is clearedwith the OBD ll scantool or HondaPGM Tester. The enablecriteriamust be repeatedif the intakeair temperature(lAT)drops lower than 36'F (20"C)from i t s v a l u ea t e n g i n e$ a n u p . EnableCriteria At enginestart up, ECTand IAT are higherthan 32'F (0"C), but lower than 95'F (35"C). At enginestart up, the ECTand IAT are within 12'F (7'C)of each other. Procedure 1. Connectthe scantool to the vehicle'sdata link connector(DLC),and bring up the tool's generic O B Dl l m o d e . 2. Startthe engine. 3. Test-drivethe vehicleunder stop-and-goconditions with short periodsof steadycruise.After about 2 . 5m i l e s( 1 . 6k m ) ,t h e r e a d i n e scso d es h o u l d switchf rom incompleteto complete. 4. lf the readinesscodeisstill setto incomplete,check for a temporaryDTC.lf there is no DTC,one or more of the enablecriteriawere probably not met; repeatthe procedure. EnableCriteria ECTat 140'F(60"C)or higher. Procedure 1. Connectthe scantoolto the vehicle'sdata link connector(DLC),and bring up the tool's generic O B Dl l m o d e . 2. Start the engine. 3. Test-drivethe vehicle under stop-and-goconditions with short periodsof steadycruise.Duringthe drive, decelerate(wirh the throttlefully closed)for 5 seconds.After about 3.5 miles (2.2km).the readinesscode should switch from incomDleteto complete. 4 . l f t h e r e a d i n e s s c o d e i s s t isl le tt o i n c o m p l e t ec,h e c k for a temporary DTC.lfthere is no DTC,the enable criteriawas probablynot meU repeatthe procedure. Air/FuelRatio(A/FlSensorHeaterMonitor Readiness Code NOTE;All readinesscodes are clearedwhen the battery is disconnectedor when the ECM is clearedwith the OBD ll scantool or HondaPGM Tester, Procedure '1. Connectthe scantool to the vehicle'sdata link connector{DLC),and bring up the tool's generic O B Dl l m o d e . 2. Startthe engine,and let it idle for 1 minute.The readinesscode should switch from incompleteto comDlete. 3. lf the readinesscode is still set to incomplete,check for a temporary DTC.lf there is no DTC,repeatthe proceoure. (cont'd) 11-47 Fueland EmissionsSystems How to Set ReadinessCodes(cont'd) \- Code MisfireMonitorand Readiness . This readinesscode is alwaysset to available becausemisfiring is continuouslymonitored. . l\4onitoringpauses,and the misfirecounterresets,if the vehicleis driven over a rough road. . Monitoringalso pauses,and the misfire counter holds at its currentvalue.if the throttle position changesmore than a predeterminedvalue,or if driving conditionsfall outsidethe rangeof any relatedenablecriteria, Code FuelSystemMonitorand Readiness . This readinesscode is always setto available becausethe fuel system is continuouslymonitored during closedloop operation. . Monitoringpauseswhen the catalyticconverter, EVAPcontrol system,and Ay'Fsensor monitorsare active. . Monitoringalso pauseswhen any relatedenable criteriaare not being met. Monitoring resumeswhen lhe enablecriteriais again being met. ComponentMonitorand Comprehensive Readiness Code This readinesscode is always set to availablebecause the comprehensivecomponentmonitor is continuously r u n n i n gw h e n e v e tr h e e n g i n ei s c r a n k i n go r r u n n i n g . L a a 11-48 PGM-FISystem ComponentLocationIndex CAMSHAFTPOS]TION{CMP)SENSORB (TOPDEAD CENTER(TDC} SENSORI Troubleshootina. oaoe 11-95 p;ge 1-1.1 Replacement, 14 ii'- r'1 ELECTRICAL LOAD DETECTOR {ELDI Troubleshooting, page1'l-92 .I11---:,I ''.!,i(..,.?:fir-J- .....,..:--. INTAKEAIRTEMPERATURE {IATISENSOR Troubleshooting, page'l'l-55 page11-'l15 Replacement, f - r \ l ENGINECOOLANTTEMPERATURE (ECTISENSOR page11-57 Troubleshooting, R e p l a c e m epnat ,g e1 11 1 4 MANIFOLD ABSOLUTE PRESSURE (MAP)SENSOR page11-52 Troubleshooting, CRANKSHAFTPOSITION ICKPISENSOR page'l1-78 Troubleshooting, page 11-'l16 Beplacement, THROTTLE POSITION ITP}SENSOR page11-60 Troubleshooting, KNOCKSENSOR page11-77 Troubleshooting, B e p l a c e m epnat ,g e1 11 1 5 AIR FUELRATIO{A/F) SENSORISENSOR1} page 11-84 Trorrbleshooting, page 11-113 Replacement, {cont'd) 11-49 PGM-FlSystem ComponentLocationIndex(cont'd) \ \., v 11-50 '} DATALINKCONNECTOR IDLCI GeneralTroubleshooting Information,page 1l 3 PGM.FIMAINRELAY1 page11-97 Troubleshooting, ENGINECONTROLMODULE g Information, GeneralTroubleshootin p a g e1 1 3 page I 1-96 Troubleshooting, 11-51 PGM-FISystem DTCTroubleshooting \ DTCP0107: MAPSensorCircuitLowVoltage 1 . T u r nt h e i g n i t i o ns w i t c hO N ( l l i . ( ls there about 5 V? YES-Repair open in the wire betweenthe Eclvl ( A 2 1 ) a n dt h e M A P s e n s o r . l 2. Checkthe MAP with the scantool. ls about 101kPa (760 mmHg,30 in.Hg)or 2.9 V indicated? YES Intermittentfailure, system is OK at this time. Checkfor poor connectionsor looseterminalsat t h e M A P s e n s o ra n d a t t h e E C M . I NO Updatethe ECMif it does not havethe latest software,or substitulea known-goodECM,then recheck(seepage 'l1-6).lf the symptom/indication goes away with a known-goodECfvl,replacethe originaE l CM.I 8 . Checkthe MAP with the scantool. ls 2 kPa (15 mmHg,0.6 in.Hg) ot lessor 0 V indicated? N O - G o t o s t e p3 . 3. Turn the ignition switch OFF. YES-Go to step 9. 4. Disconnectthe MAP sensor3P connector. NO Replacethe lvlAPsensor.l 5 . T u r nt h e i g n i t i o ns w i t c hO N ( l l l . 9 . Turn the ignitionswitch OFF. 6. lvleasurevoltage betweenMAP sensor3P c o n n e c l o tre r m i n a l sN o . 1 a n d N o . 3 . '10.Disconnect ECMconnectorA (31P). 1 1 .Checkfor continuitybetweenMAP sensor MAP SENSOR3P CONNECTOF connectorterminal No. 2 and body ground. \ ( MAP SENSON3P CONNECTOA sGl {GRN/WHTI Wires de of femaleterminais ls there about 5 V? YES Go to step8. ls therc continuity? N O - G o t o s t e p7 . 1 . Measurevoltage betweenEClvlconnector t e r m i n a l s4 1 1 a n d 4 2 ' 1 . ECM CONNECTOR A 13'IP} vccr {YEL/BED) YES-Repair short in the wire betweenthe ECM ( A 1 9 )a n d t h e M A P s e n s o r . l NO Updatethe ECM if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe o r i g i n aE l CM.I sGr {GRN/WHT} Wire side of female terminals 11-52 ( DTCP0108:MAPSensorCircuitHighVoltage '1. Startthe engine.Holdthe engine at 3,000rpm with no load (in neutral)until the radiatorfan comes on, then let it idle. 2. Checkthe MAP with the scantool. le about 101kPa (780 nmHg, 30 in.Hg)ot highet, or about2.9 V or higher indicated? 9. Measure voltagebetweenMAPsensor3P connector terminalsNo.1 andNo.3. MAP SENSOR3PCONNECTOF vccl { Y E L / Rl E , lD o) cl l . l . r l I lsct d) l{GRN/wHrr Y I l l i YES Go to step 3. l W i r es i d eo f f e m a l el e r m i n a l s NO-lntermittent failure,system is OK at this time. Checkfor poor connectionsor looseterminalsat the MAP sensorand at the ECM.I ls there about 5 V? 3. Turn the ignitionswitch OFF. YES Go to step 10. 4. DisconnecttheMAP sensor3P connector. NO Repairopen in the wire betweenthe ECM (A11) and the MAP sensor.I 5, ConnectMAP sensor3P connectorterminalsNo. 2 and No. 3 with a jumper wire. MAP S€NSOR3P CONNECTOR 1 0 .Turn the ignitionswitch OFF. 1 1 .C o n n e c E t C Mc o n n e c t otre r m i n a l sA 1 1 a n d A 1 9 with a jumper wire. 1 2 3 MAP {GRN/REO} A {31PI ECMCONNECTOR SG1(GRN/WHTI JUMPER WIRE J U M P E RW I A E Wiresideof femaleterminals Wire side of fema e te.minals 6. Turn the ignition switch ON (ll). T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . 7. Checkthe MAP with the scantool. Checkthe MAP with the scantool. ls about 101kPa (760 mmHg,30 in.Hg) ot higher, or about2.9 V or higher indicated? ls about 101kPa (760 mmHg,30 in.Hg)or higher, or about2.9 V ot higher indicated? YES-Go to step 8. NO Replacethe MAP sensor.I 8 . R e m o v et h e j u m p e rw i r e . YES Updatethe ECM if it does not have the lalest software,or substitutea known-goodECM,lhen recheck(seepage 11-6).lf the symptom/indication goes away with a known good ECM,replacethe originaE l CM.I NO-Repair open in the wire betlveenthe ECI\il ( A 1 9 )a n dt h e M A P s e n s o r . I 11-53 PGM-FISystem DTCTroubleshooting(cont'dl DTCPl128:MAPSensorSignalLowerThan Expected 1. Turn the ignition switch ON (ll). 2. Checkthe MAP with the scantool. ls 54.1 kPa(406mmHg, 16.0in.Hg),1.6 V, or higher indicated? YES- Intermittentfailure.system is OK at this time.I NO Replacethe MAP sensor.l \ DTCPl129:MAPSensorSignalHigherThan Expected 1. Startthe engine.Hold the engineat 3,000rpm with no load (in neutral)until the radiatorfan comes on, then Iet it idle. 2. Checkthe MAP with the scantoot. ls 36.9 kPa (277 mmHg, 10.9 in.Hg),1.1 V , or less indicated? YES- lntermittentfailure,system is OK at this time.l NO Replacethe MAP sensor.l \ \ 11-54 a DTCP0112: IATSensorCircuitLowVoltage 1 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . 2. Checkthe IAT with the scantool. ls 302'F (150'C) or highet (or H-Limit in Honda node of PGM Tester),ot 0 V indicated? 8. Checkthe temperaturereadingon the scantool. Be aware that if the engine is warm, the reading w i l l b e h i g h e rt h a n a m b i e n t e m p e r a t u r el I. t h e engine is cold, the IAT and ECTwill have the same v al u e . ls the correct ambient temperatureindicated? YES lntermittentfailure,system is OK at this time Checkfor poor connectionsor looseterminalsat t h e I A Ts e n s o ra n d a t t h e E C M . I VES-Go to step 3. NO Go to step 8. NO Replacethe IAT sensor.l Disconnectthe IAT sensor2P connector. 4 . Checkthe IAT with the scantool. ls 302'F(150'C)or higher (or H-Limit in Honda mode of PGM Testet),ot 0 V indicated? YES-Go to step 5. NO- Replacethe IAT sensor.I 5 . Turn the ignition switch OFF. 6 . DisconnectECMconnectorB (24P). 7 . Checkfor continuitybetweenIAT sensor2P c o n n e c t otre r m i n a lN o . 2 a n d b o d y g r o u n d , IAT SENSOR2PCONNECTOR ,^\ , l r 2 l t -----Tr--- - l IAT _t{RED/YELI II W i r es i d eo f f e m a l et e r m i n a i s ls there continuity? YES Repairshon in the wire betweenthe ECM ( B ' 1 7a) n d t h e I A Ts e n s o r . l NO Updatethe ECM if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CM.I 11-55 PGM-FISystem DTCTroubleshooting(cont'dl DTCP0113: IATSensorCircuitHighVoltage 1. Turnthe ignitionswitchON (ll). \ I \" { 7. Checkthe IAT with the scantool. ls - 4"F ( 20'C) or less(or L-Limitin Honda mode ot PGM Tester) or 5 V indicated? 2. Checkthe IATwith the scantool. YES Go to step 8. ls 4'F (-20'C) or less(or L-Limitin Honda modeot PGM Tester)or 5 V indicated? NO - Replacethe IAT sensor.l YES-Go to step 3. 8. Turn the ignition switch OFF. NO Intermitentfailure,system is OK at this time. Checkfor poor connectionsor looseterminalsat the IAT sensorand at the ECM.I 9 . R e m o v et h e j u m p e rw i r e . 1 0 . C o n n e cE t C Mc o n n e c t otre r m i n a l sA 1 0 a n d 8 1 7 w i t h a j u m p e rw i r e . 3 . Turn the ignitionswitch OFF. ECM CONNECTORS 4. Disconnectthe IAT sensor2P connector. ConnectIAT sensor2P connectorterminalsNo. 1 a n d N o . 2 w i t h a j u m p e rw i r e . A (31 P) B {24 P) IATSENSOR 2PCONNECTOR rJ-- :--- JUMPERWIRE l ' l L l -'_-l--_----r--_ sG2 rAT I {GRN/YEL) IRED/YEL) I L ] WIRE JUMPER Wiresideof femaleterminals 1 1 .T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . 12. Checkthe IAT with the scantool. Wiresideof femaleterminals ls - 4"F ( 20"C) or less (or L-Limitin Honda mode of PGM Tester) or 5 V indicated? 6 . T u r nt h e i g n i t i o ns w i t c hO N { l l ) . YES Updatethe ECMif it does not have the latest software,or substitutea known-goodECI\4then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM.replacethe originaE l C M !. NO Repairopen in the wire betweenthe ECM ( A 1 0 ,8 1 7 )a n dt h e I A Ts e n s o r . I \ 11-56 ( DTCP0116:ECTSensorRange/Performance Problem NOTE:lf DTCP0117and/or P0118are storedat the same time as DTCP0116,troubleshootthose DTCSfirst, then recheckfor DTCP0116, 1. Stanthe engine.Hold the engineat 3,000rpm with no load {in neutral)until the radiatorfan comes on, then let it idle. 2. Checkthe ECTwith the scantool. ls 176- 212'F (80 indicated? 100"C)or0.5 0.8V YES Intermittentfailure.system is OK at this time. Checkthe thermostatand the cooling system.l NO-Checkthe thermostatand the cooling system. lf they are OK, replacethe ECTsensor.l 11-57 PGM-FISystem DTCTroubleshooting(cont'dl DTCP0117:ECTSensorCircuitLow Voltage 1 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . 2. Checkthe ECTwith the scantool. \ ( 7. Checkfor continuitybetweenthe ECTsensor2P connectorterminal No. 1 and bodv oround. ECTSENSOR2PCONNECTOR ls 150'C (302'F)or higher (ot H-Limit in Honda mode of PGM Tester) or 0 V indicated? YES Go to step 3. NO Intermittentfailure,system is OK at this time. Checkfor poor connectionsor looseterminalsat the ECTsensorand at the ECM.t Wire side of femaleterminals 3. Disconnectthe ECTsensor2P connector. 4. Checkthe ECTwith the scantool. ls there continuity? ls 150'C (302"F)or higher (ot H-Limit in Honda mode ot PGM Tester) or 0 V indicated? YES-Repair short in the wire betweenthe ECM ( B 8 )a n d t h e E C Ts e n s o r . l YES-Go to step 5. NO-Update the ECMif it does not havethe latest software,orsubstitutea known-goodECM,then recheck{seepage 11-6).lf the symptom/indication goes away with a known-goodEClvl,replacethe originaE l CM.I NO Replacethe ECTsensor.! 5. Turn the ignition switch OFF. ( 6. DisconnectECMconnectorB (24P). ( 11-58 DTCP0118: ECTSensorCircuitHighVoltage 1 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . 1 . Checkthe ECTwith the scantool. ls 20"C ( 4"F)or less (or L-Limitin Honda mode ot PGM Tester) or 5 V indicated? 2. Checkthe ECTwith the scantool. YES-Go to step 8. ls 20'C ( 4'F)or less(or L-Limitin Honda mode of PGM Tester) or 5 V indicated? ? NO Replace t h e E C Ts e n s o r . I YES Go to step 3. 8 . Turn the ignition switch OFF. NO lntermittentfailure,system is OK at this time. Checkfor poor connectionsor looseterminalsat the ECTsensorand at the ECM.I 9 . R e m o v et h e j u m p e rw i r e . Turn the ignitionswitch OFF. 1 0 . ConnectECMconnectorterminalsA10 and Bg with a j u m p e rw i r e . ECM CONNECTORS Disconnectthe ECTsensor2P connector. 5 . Connectthe ECTsensor2P connectorterminals N o . 1 a n d N o . 2 w i t h a j u m p e rw i r e . a {31P} B {24P) ECTSENSOR2P CONNECTOR JUMPERWIRE \ lt tt .l t l l -I-l*, Ecr (RED/WHT) Wiresideof femaleterminals {GRN/YEL) t l WIRE JUMPER 1 1 .T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . 1 2 . Checkthe ECTwith the scantool. wire sideoI Iemaleterminals ls 20"C ( 4"F) or less (or L-Limitin Honda mode of PGM Tester) ot 5 V indicated? 6 . T u r nt h e l g n i t i o ns w i t c hO N ( l l ) . YES- Updatethe ECM if it does not havethe latest then software,or substitutea known-goodECI\4, recheck(seepage 11-6).If the symptom/indication goes away with a known-goodECM,replacethe o r i g i n aE l CM.I NO Repairopen in the wire betweenthe ECM ( A 1 0 ,8 8 ) a n d t h e E C Ts e n s o r . l 11-59 PGM-FISystem DTCTroubleshooting(cont'dl DTCP0122:TP SensorCircuitLowVoltage 1 . T u r nt h e i g n i t i o ns w i t c ho N ( 1 1 1 . 2. Checkthe throttle positionwith the scantool. 8. At the sensorside, measureresistancebetweenthe TP sensor3P connectorterminalsNo. 1 and No. 2 with the throttlefully closed. TP SENSOR3P CONNECTOR ls there about 10./.or 0.5 V when the thrcttle is fully closed and about 90% or 4.5 V when the throttle is fully opened? YES Intermittentfailure,system is OK at this time. Checkfor poor connectionsor looseterminalsat the TP sensorand at the ECM.t NO Go to step 3. 3. Turn the ignition switch OFF, T e r m i n as li d eo f m a l et e r m i n a l s 4. Disconnectthe TP sensor3P connector. Is there about 0.5 0.9 kQ ? 5 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . YES Go to step 9. 6. Measurevoltagebetweenthe TP sensor3P connectorterminals No. 1 and No. 3. NO Replacethe throttle body (theTP sensoris not a v a i l a b l es e p a r a t e l yI) . TP SENSOR3P CONNECTOR 9 . Measureresistancebetweenthe TP sensor3P connectorterminalsNo. 2 and No. 3 with the throttlefully closed. TPSENSOR 3PCONNECTOB Wire side of femaleterminals ls thereabout5 V? Terminalsideof maleterminals YES-Go to step7. N O G ot o s t e p1 4 . 1 . Turnthe ignitionswitchOFF. ls there about 4.5k{l ? YES Go to step 10. NO Replacethe throttle body (theTP sensoris not a v a i l a b l es e p a r a t e l yI) . 1 0 . D i s c o n n e cEt C Mc o n n e c t oA r (31P). 11-60 \ 11. At thewire harnessside,checkfor continuity terminalNo,2 betweenTPsensor3Pconnector a n db o d yg r o u n d . TP SENSOR3P CONNECTOR 11 2 1 3 13. At thewire harnessside,checkfor continuity terminalNo.2 betweenTPsensor3Pconnector a n db o d yg r o u n d . TP SENSOR3PCONNECTOR 1 2 3 TPS (RED/BLX} 'PS REO/BLKI Wire sideof female terminals Wire side ot Iemaleterminals ls there continuity? ls thetecontinuity? YES-Repairshortin the wire betweenthe ECM { A 1 5a) n dt h eT Ps e n s o r . l l N O - G o t o s t e p1 2 . terminalA15to body 12. ConnectECMconnector groundwith a jumperwire. A 131P) ECMCONNECTOR 9 1 1 2 1 34 5 6 7 19 t c 6 10 1 1 1 1 2 8 t2021 23124 YES-Update the ECM if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CM.I NO- Repairopen in the wire betweenthe ECM ( A 1 5 )a n d t h e T P s e n s o r . l 14. lvleasurevoltage betweenECMconnector t e r m i n a l s4 1 0 a n d A 2 0 . A 131P} ECMCONNECTOB 28129130 wrne ,tf$,rr*, ];uueen vcc2 (YEL/8LU) Wire side oJ.femaleterminals Wire side of female terminals ls there about 5 V? YES Repairopen in the wire betlveenthe ECM ( A 2 0 )a n d t h e T P s e n s o r . I NO Updatethe ECM if it does nor have the latest software,or substilutea known-goodECM,then r e c h e c k( s e ep a g e11 - 6 ) l.f t h e s y m p l o m i n d i c a t i o n goes away with a known-goodECM.replacelhe originaE l CM.I 11-61 PGM-FISystem DTCTroubleshooting(cont'd) DTCP0123: TPSensorCircuitHighVoltage 1 . T u r nt h e i g n i t i o ns w i t c ho N ( l l ) 2. Checkthe throttle positionwith the scantool. ( 7. Measurevoltage betweenECMconnector terminalsA10 and A20. ECMCONNECTOR A 131PI ls there about 10%or 0.5 V when the throttle is fully closed and about 90% or 4.5 V when the throttle is f ully opened? YES lntermittentfailure.system is OK at this time. Checkfor poor connectionsor looseterminalsat t h e T P s e n s o ra n d a t t h e E C M I, NO Go to step 3. Wiresideof femaleterminals 3. Turn the ignition switch OFF. Is there about 5 V? 4. Disconnectthe TP sensor3P connector. 5 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . 6. At the wire harnessside, measurevoltage between the TP sensor3P connectorterminalsNo. 1 and No.3. TP SENSOR3P CONNECTOR W;resideof femaleterminals ls thete about 5 V? YES-Replace the throttle body (theTP sensor is not availableseparately). I NO Go to step 7. 11-62 YES- Repairopen in the wire betweenthe ECM (A10)and the TP sensor.t NO Updatethe ECMif it does not havethe latest soflware,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe o r i g i n aE l CM.I ( DTCPl121:TPSensorSignalLowerThan Expected DTCP1122:.fP SensorSignalHigherThan Expected 1 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . 1 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . 2. Checkthe throttle positionwith the scantool. 2. Checkthe throttle positionwith the scantool. ls 12.9'/.,0.6 V, or higher indicated when the throttle is tully opened? ls 12.9%,0.6 V, or lessindicated when the throttle is f ully closed? YES- Intermittentfailure,system is OK at this time.I YES Intermittentfailure,system is OK at this time.l NO-Replace the TP sensor(the TP sensor is not availableseparately). I NO Replacethe TP sensor(theTP sensoris not availableseparately). I 11-63 PGM-FISystem (cont'dl DTGTroubleshootang DTCP0128:CoolingSystemMalfunction \ 3. Checkthe radiatorfan. Does the tadiator fan keep running? NOTE;lf the DTCSlistedbelow are stored at the same time as DTCP0128.troubleshootthose DTCSfirst, then recheckfor P0128. P 0 1 0 7P, 0 1 0 8P, 1 1 2 8P , 1 1 2 9N : 4 a n i f o ladb s o l u t e pressure(MAP)sensor P] I06, P1107,P1108:Barometricpressure(BARO) sensor P1259:VTECsystem P0116,P0117, P0118:Enginecoolanttemperature(ECT) sensor P0112,P0113: Intakeair temperature(lAT)sensor P0500:Vehiclespeedsensor{VSS) P0335,P0336:Crankshaftposition(CKP)sensor P0300:Randommisfire P 0 3 0 1P , 0 3 0 2P, 0 3 0 3P , 0 3 0 4N : o . 1 ,N o .2 , N o . 3 o r N o . 4 cylinder misfire P0505:ldle control system malfunction P 1 5 1 9l:d l ea i r c o n t r o l( l A C ) v a l v e DTCP0128can occasionallyset when the hood is o p e n e dw h i l e t h e e n g i n ei s r u n n i n g . 1. Checkthe enginecoolant level Is the engine coolantlevel low? VES Refillthe enginecoolant.lf necessary,repair t h e c o o l a n tl e a k a g e . l NO Go to step 2. 2 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) ,a n d m a k es u r et h e A,/Cis off. 11-64 YES Checkthe radiator fan circuit(seepage 1014),the radiatorfan switch circuit(Short)(seepage 10-'16), and the radiatorfan switch (seepage 10-17). Also, inspectthe ECTand IAT circuitsand terminal connections.lf the circuits,the switch,and the connectionsare OK, updatethe ECI\4if it does not have the latestsoftware.or substitutea knowngood ECM,then recheck(seepage 11-6).lf the symptom/indicationgoes away with a known-good E C M ,r e p l a c et h e o r i g i n a E l CM.I NO Replacethe thermostat(seepage 10-8).1 a DTCP0134:Ay'FSensor(Sensor1) No Activity Detected 1. Checkthe attachmentstateof the A,/Fsensor ( S e n s o r1 ) . DTCP0137: Secondary HO2S(Sensor 2) CircuitLowVoltage 1 . R e s e t h e E C M( s e ep a g eI 1 - 4 ) ls it slacked f rom the exhaust pipe? 2. Start the engine.Holdthe engine at 3,000rpm wilh no load (in neutral)until the radiatorfan comes on. YES- Reinstallthe Ay'Fsensor(Seneor1) (seepage 11-113).t 3. Checkthe secondaryHO2S(Sensor2) output voltageat 3,000rpm with the scantool. NO-Go to step 2. ls there 0.3 V or less? 2 . R e s e t h e E C M( s e ep a g e11 - 4 ) . YES Go to step 4. 3 . S t a nt h e e n g i n e H . o l dt h e e n g i n es p e e da t 3,000rpmwith no load (in neutral)until the radiator fan comes on, then let it idle for 2 minute. NO-lntermittent failure,system is OK at this time. Checkfor poor connectionsor looseterminalsat the secondaryHO2S(Sensor2) and at the ECM.I ls DTC PO134 indicated? 4. T u r nt h e i g n i t i o ns w i t c hO F F . YES-Replacethe Ay'Fsensor{Seneor1) (seepage 11-113).t 5 . Disconnectthe secondaryHO2S(Sensor2) 4P NO - Intermittentfailure, sistem is OK at this time. Checkfor poor connectionsor looseterminalsat the Ay'Fsensor(Seneor1) and the ECM.I 6 . Turn the ignition switch ON (ll). connector. 7 . Checkthe secondaryHO2S(Sensor2) output voltagewith the scantool. ls there 0.3 V or less? YES Go to step 8. r ).1 NO Replace t h e s e c o n d a r yH O 2 S( S e n s o 2 8 . Turn the ignition switch OFF. r (31P). 9 . D i s c o n n e cEt C Mc o n n e c t oE icont'd) 11-65 PGM-FISystem a DTCTroubleshooting(cont'dl 10. Checkfor continuitybetweenthe secondaryHO2S (Sensor2) 4P connectorterminal No. 2 and body ground. SECONDARY H02S 2) 4PCONNECTOR ISENSOR DTCP0138: Secondary HO2S(Sensor 2) CircuitHighVoltage 1 . R e s e t t h eE C M{ s e ep a g e ' 1 1 - 4 ) . 2. Startthe engine.Hold the engineat 3,000rpm with no load (in neutral)until the radiatorfan comes on. 3. Checkthe secondaryHO2S(Sensor2) output voltageat 3,000rpm with the scantool. ls thete 1.0 V or morc? YES Go to step 4. Terminalside of male terminals NO-lntermittent failure,system is OK at this time. Checkfor poor connectionsor looseterminalsat the secondaryHO2S(Sensor2) and at the ECM.I ls there continuity? 4. Turn the ignition switch OFF. YES-Repair shon in the wire betweenthe ECM (E2)and the secondaryHO2S(Sensor2).t NO Updatethe ECM if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CM.I| 5. Disconnectthe secondaryHO2S(Sensor2) 4P connector. ConnectsecondaryH02S (Sensor2) 4P connector t e r m i n a l sN o . 1 a n d N o . 2 w i t h a j u m p e rw i r e . SECONDARY HO2S {SENSOR2) 4P CONNECTOR JUMPERWIRE SG3 (PNKI SHO25(WHT/RED) T e r m i n asl i d eo Jm a l et e r m i n a l s 7. Turn the ignitionswitch ON (ll). 11-66 8 . Checkthe secondaryH02S (Sensor2) output voltagewith the scantool, ls there 1.0 V ot mote? YES-Go to step 9. DTCP0139:SecondaryHO2S(Sensor2l Slow Response 1 . R e s e t t h eE C M( s e ep a g e1 1 - 4 ) . Start the engine.Holdthe engine at 3,000rpm with no load (in neutral)until the radiatorfan comes on. NO Replacethe secondaryHO2S(Sensor2).1 3 . Checkthe secondaryHO2S(Sensor2) output 9 . Turn the ignitionswitch OFF. 1 0 . ConnectECMconnectorterminalsE2 and E4 with a J U m p ew r rre. E 131PI ECMCONNECTOR JUMPERWIRE voltageat 3,000rpm with the scantool. ls thete 0.3- 0.8 V, fot 2 minutes? YES Replacethe secondaryHO2S(Sensor2).! NO- lntermittentfailure,system is OK at this time. Checkfor poor connectionsor looseterminaisat the secondaryHO2S(Sensor2) and at the ECM.I Wiresideof femaleterminals 1 1 .Turn the ignition switch ON (ll). 1 2 . Checkthe secondaryHO2S(Sensor2) output voltagewith the scantool. ls there 1.0 V or more? YES Updatethe ECM if it does not have the latest soflware,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM.replacethe originaE l CM.I NO Repairopen in the wire betweenthe ECM (E2, E4)and the secondaryHO2S{Sensor2).I 11-67 PGM-FISystem DTCTroubleshooting(cont'dl DTCP0141: Secondary HO2S(Sensor 2l HeaterCircuitMalfunction 1. Resetthe ECM(seepage 1 l-4) 6. Checkfor continuitybetweenbody ground and secondaryH02S (Sensor2) 4P connectorterminals N o . 3 a n d N o .4 i n d i v i d u a l l y . SECONDARY HO2S{SENSOR 214PCONNECTOR 2. Startthe engine. ls DTC P0141indicated? YES-Go to step 3. NO-lntermittent failure,system is OK at this time. Checkfor poor connectionsor looseterminalsat the secondaryHO2S(Sensor2) and at the ECM.I Wire side of femaleterminals 3 . Turn the ignitionswitch OFF. Disconnectthe secondaryH02S (Sensor2) 4P connecror. ls therecontinuity? YES- Replace the secondary HO2S(Sensor2).1 5 . At the secondaryHO2S(Sensor2) side, measure resistancebetweenH02S 4P connectorterminals N o . 3 a n d N o .4 . NO-Go to step7. 7 . Turnthe ignitionswitchON (ll). HO2S(SENSOR SECONDARY 214PCONNECTOR 8 . Measure voltagebetweensecondary H02S4P connector terminalsNo.3 andNo.4, SECONDARYHO2S (SENSOR2l ilP CONNECTOR s02sHTc {BLK/WHTI IG1(BLK/ORN} Wire side ol lemale terminals ls thereabout3.3 Q ? T e r m i n asli d eo f m a l et e r m i n a l s YES Goto step6. NO- Replace the secondary HO2S(Sensor 2).t ls there battery voltage? YES Go to step 9. NO Go to step 12. 9 . Turn the ignition switch OFF. 1 0 . DisconnectECMconnectorE {31P) 11-68 t 11. Checkfor continuitybetweenECMconnector terminalE6andbodyground. ECM CONNECTORE {31PI 1 3 .Turn the ignitionswitch OFF. 1 4 . Reconnectthe secondaryHO2S(Sensor2) 4P connector. t5. DisconnectECMconnectorE (31P). to. Turn the ignition switch ON (ll). 1 7 . Measurevoltage betweenECMconnectorterminal E 6a n d A 5 . ECMCONNECTORS Wire side o{fIemaleterminals A (31 P) ls therc continuity? YES-Repair short in the wire betweenthe ECM r ).1 ( E 6 )a n d t h e s e c o n d a r yH O 2 S( S e n s o 2 NO-Update the ECM if it does not have the latest soflware,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe o r i g i n aE l CM.I MeasurevoltagebetweensecondaryHO2S (Sensor2) 4P connectorterminal No. 4 and body g round. HO2S{SENSOR 2I 4PCONNECTOR SECONDARY tFff I E {31P} Wire side ot femaleterminals Is there 0-1 V or less? YES-Repair open in the wire betweenthe ECM (E6)and the secondaryHO2S(Sensor2).! NO Updatethe ECM if it does not havethe latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe . o r i g i n aE l CMa l[faJl--ro' 14 | IBLK/OFN) Y I Terminal sideof maleterminals ls there battety voltage? YES Go to step 13. N O - C h e c k t h e N o . 4 A C G ( 1 0 A )f u s ei n t h e u n d e r dash fuse/relaybox. lf the fuse is OK, repair open in the wire betweenthe secondaryHO2S(Sensor2) a n d N o . 4 A C G ( 1 0 A )f u s e . l 11-69 PGM-FISystem DTCTroubleshooting(cont'dl FuelSystemToo Lean DTCP0171: 3. Turn the ignition switch OFF. DTCP0172:FuelSystemToo Rich 4. With a vacuum pump, apply vacuum to the evaporativeemission(EVAP)canisterpurge valve (A) from the evaporativeemission(EVAP)canister side. NOTE:lf some of the DTCSlistedbelow are storedat the same time as DfC PO17'land/ot PO172, troubleshootthose DTCSfirst, then recheckfor P0171 andlot P0112. P 0 1 0 7P, 0 1 0 8P. 11 2 8 .P 11 2 9 :M a n i f o l da b s o l u t e p r e s s u r e( M A P )s e n s o r P1162.P1166,P 1167:4,,/Fsensor(Sensor1) heater r) P 0 1 3 7P, 0 1 3 8S: e c o n d a r yH O 2 S( S e n s o 2 P014'l:SecondaryHO2S(Sensor2) heater P1259:VTECsystem 1 . C h e c kt h e f u e l p r e s s u r e( s e ep a g e1 1 - ' 1 4 5 ) . ' ls luel pressure OK? A973AX-041-XXXXX YES Go to step 2. Does it hold vacuum? NO Checkthese items: . lf the pressureis too high, replacethe fuel p r e s s u r er e g u l a t o(rs e ep a g e1 1 - 1 5 2 ) . 1 . l f t h e p r e s s u r ei s t o o l o w . c h e c k t h e f u epl u m p , the fuel feed pipe,the fuel filter, and replacethe f u e l p r e s s u r er e g u l a t o (r s e ep a g e1 1 - 1 5 2 ) . I 2. Startthe engine.Hold the engineat 3,000rpm with no load (in neutral)until the radiatorfan comes on. 11-70 YES-Check the enginevalve clearancesand adjust if necessary,lf the valve clearancesare OK, replace t h e i n j e c t o r s( s e ep a g e11 - 111 ) . 1 NO-Replace the EVAPcanisterpurge valve.l DTCP0300: RandomMisfireandAny Combination of the Following: DTCP0301: No.1 CylinderMisfire DTCP0302:No.2 CvlinderMisfire DTCP0303: No,3 CvlinderMisfire DTCP0304:No. 4 CvlinderMisfire NOTE: . lfthe misfiring is frequentenoughto trigger detectionof increasedemissionsduring two consecutivedriving cycles. the MIL will come on, and DTCP0300(and some comlrinationof P0301through P0304)will be stored. . lf the misfiring is frequentenoughto damagethe catalyst,the MIL will blink wheneverthe misfiring occurs,and OTC P0300(and some combinationof P0301through P0304)will be stored.When the misfirlng stops,the MIL will remain on. 1. Troubleshootthe following DTCsfirst if any of them were stored along with the random misfire DTC(s): P 0 ' 1 0 7P,0 1 0 8P, 1 1 2 8P , 1 1 2 9N r 4 a n i f o ladb s o l u t ep r e s s u r e( M A P )s e n s o r P0111.P0'172t Fuelsvstem P0335.P0336:Crankshaftposition(CKP)sensor P0505:ldle control system sensor P1149,Pl 162,P1163,P1164,P 1165:Air fuel ratio (Ay'F) P1259:VTECsystem P1361,P1362:Camshaftposition(CMP)sensorB {Top dead center(TDC)sensor) P 1 5 1 9l:d l ea i r c o n t r o l( l A C )v a l v e 2. Test-drivethe vehicleto verify the symptom. 3. Findthesymptom inthechart below, and dothe relatedproceduresin the order listeduntil you find the cause. Symptom R a n d o mm i s f i r eo n l y at low RPMand under load R a n d o mm i s f i r eo n l y du ring acceleration Randommisfire at h i g h R P M ,u n d e r l o a d ,o r u n d e r random conditions Procedure(sl Also check foi: Checkfuel pressure(seepage 11-145). . Lowcompressron. . Lowqualityfuel. Checkfuel pressure(seepage 11-145). in the Malfunction VTECsystem(seepage 1' t-123). C h e c kf u e l p r e s s u r e( s e ep a g e1 1 - 1 4 5 ) . Correctenginevalve clearances(seepage 691. 11-71 PGM-FISystem I DTCTroubleshooting(cont'dl No.1 CylinderMisfire DTCP0301: 1 . Determinewhich cylinder(s)had the misfire. DTCP0302:No.2 CylinderMisfire Does the misf ire occur in the cylinder where the ignition coil was exchanged? DTCP0303:No.3 CylinderMisfire YES Replacethe faulty ignitioncoil.! DTCP0304:No. 4 CylinderMisfire NO-Go to step 8. 1. After checkingand recordingthe freezedata,reset the ECM (seepage 11-4).lf there is no freezedata of the misfire,just clearthe DTC. 2. Startthe engine,and listenfor a clickingsound from the injectorat the problemcylinder. 8 . Turn the ignition switch OFF. 9 . Exchangethe spark plug from the problemcylinder with one from anothercylinder. 1 0 .Test-drivethe vehiclefor severalminutes in the rangeof the freezedata or under various conditionsif there was no freezedata. Does the injector click? YES-Go to step 3. 1 1 .Checkfor a DTCor TemporaryDTCwith the scan Tool. ls DTC ot Tempotary DTC P0301, P0302, P0303 or P0304indicated? NO-Go to step 30. 3. Turn the ignition switch OFF. YES Go to step 12. 4. Exchangethe ignition coil from the problem cylinderwith one from anothercylinder, NO Intermittentmisfiredue to spark plug fouling, e t c .( n o m i s f i r ea t t h i st i m e ) . 1 5. Test-drivethe vehiclefor severalminutesin the range of the freezedata or under va rious conditionsif there was no freezedata. Determine w h i c h c y l i n d e r ( sh)a dt h e m i s f i r e . Does the misl ire occur in the cylinder where the spark plug was exchanged? 6. Checkfor a DTCor a TemporaryDTCwith the scan root. YES Replace t h e f a u l t ys p a r kp l u g . l ls DTC or Tempotaty DTC P0301, P0302, P0303 or P0304 ind icated? NO Go to step 13. YES Go to step7. Turn the ignition switch OFF. NO Intermittentmisfire due to poor contactat the i g n i t i o nc o i l c o n n e c t o r {sn o m i s f i r ea t t h i st i m e ) . Make sure the coil connectionsare secure.l 1 4 . Exchangethe lnjectorfrom the problemcylinder w i t h o n ef r o m a n o t h e rc y l i n d e r . t5. 11-72 L e tt h e e n g i n ei d l ef o r 2 m i n u t e s . 1 6 .Test-drivethe vehiclefor severalminutesin the rangeof the freezedata or under various conditionsif there was no freezedata. 't7. Checkfor a DTCor a TemporaryDTCwith the scan 22. Measurevoltage betweenignition coil 3P connectorterminal No. 3 and body ground. IGNITIONCOIL3P CONNECTOR Tool. ls DTC or TemporaryDTC P0301,P0302, P0303 or P0304 indicated? YES Go to step 18. NO lntermittentmisfire due to bad contactat the injectorconnector(no misfireat this time). Make surethe injectorconnectionis secure.Checkfor poor connectionsor looseterminalsat the injector.l Wire side ol femaleterminals ls there battery voltage? 1 8 .Determinewhich cylinder(s)had the misfire. YES-Go to step 23. Does the misf ire occur in the cylinder where the i njector w as exchanged ? NO Repairopen in the wire betweenthe No. 1 I G NC O I L( 1 5 A ) f u s ea n dt h e i g n i t i o nc o i l . I YES- Replacethe faulty injector.I 2 3 . Turn the ignitionswitch OFF. NO-Go to step19. 24. Checkfor continuitybetweenignitioncoil 3P 1 9 .Turn the ignitionswitch OFF. 20. Disconnectthe ignitioncoil 3P connectorfrom the connectorterminal No. 2 and body ground. IGNITIONCOIL3PCONNECTOR problemcylinder. Turn the ignition switch ON (ll). Wire side ot femaleterminals ls there continuity? YES Go to step 25. NO Repairopen in the wire betweenthe ignition c o i l a n dG 1 0 1 . 1 DisconnectECMconnectorA {31P) (cont'd) 11-73 PGM-FISystem a DTCTroubleshooting(cont'dl 26. Checkfor continuitybetweenbody ground and ECMconnectorterminal (seetable). 28. Checkfor continuitybetweenbody ground and ECMconnectorterminal (seetable). ECMCONNECTOR A {31PI PROBLEIVI CYLINDER DTC ECM WIRE TERMINAL COLOR N o .1 No.2 No.3 No,4 P0301 P0302 P0303 P0304 430 A.29 428 421 YEUGRN BLU/RED WHT/BLU BRN ECMCONNECTOR A {31P} PROBLEM CYLINDER No.1 N o .2 N o .3 N o .4 DTC P0301 P0302 P0303 P0304 ls there continuity? ls there continuity? YES Repairshon in the wire betweenthe EClvl a n dt h e i g n i t i o nc o i l . l YES-Go to step 29. ECM WIRE TERI\4INAL COLOR A30 YEL/GRN 429 BLU/RED A.28 WHT/BLU A.21 BRN NO Repairopen in the wire betweenthe ECMand t h e i g n i t i o nc o i l . l NO-Go to step 27. 2 7 . C o n n e c itg n i t i o nc o i l 3 P c o nn e c t o rt e r mi n a l N o . 1 t o body ground with a jumper wire (seetable). IGNITIONCOII 3PCONNECTOR 29. Checkthe engine compression ls the compression OK? YES-Update the ECM if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CI\4.I N O - R e p a i tr h e e n g i n e . l Wire s de of femaleterminals 3 0 . DisconnectECMconnectorB (24P). PROBLEM CYLINDER No.1 N o .2 N o .3 N o .4 11-74 DTC WIRECOLOR P0301 P0302 P0303 P0304 YEUGRN BLU/RED WHT/BLU T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . BRN 32. fvleasure voltagebetweenbodygroundandECM connector terminal(seetable). ECMCONNECTOR B (24P) 36. Exchangethe injectorfrom the problemcylinder w i t h o n e f r o m a n o t h e rc y l i n d e r . 3 7 . L e t t h ee n g i n ei d l ef o r 2 m i n u t e s . 3 8 . Test-drivethe vehiclefor severalminutes in the r a n g eo I t h e l r e e z ed a t ao r u n d e rv a r i o u s condilionsif there was no freezedata. 39. Checkfor a DTCor TemporaryDTCwith the scan tool. ls DTC or TemporaryDTC P0301,P0302, P0303, or P0304 indicated? W i r e s i d e o f f e m a l et e r m r n a l s YES Go to step 40. PROBLEM CYLINDER No. 1 No.2 No.3 No.4 DTC P0301 P0302 P0303 P0304 ECt\4 TERMINAL B5 B4 B3 WIRE COLOR BRN RED BLU YEL NO Intermittentmisfiredue to injector malfunction,etc. Make sure the injector connectionsare secure.Checkfor poor connections or looseterminalsat the injectorconnector.l D e t e r m i n ew h i c hc y l i n d e r { sh}a d t h e m i s f i r e . ls there battery voltage? YES-Go to step 33, Does the mislirc occur in the cylinder whete the i nj ector w as exchanged ? N O G o t o s t e p4 1 . YES Replacethe faulty injector.l 33. Turn the ignitionswitch OFF,and removethe engine cover. 34. Disconnectthe injector2P connectorfrom the p r o b l e mc y l i n d e r . 3 5 , Measurethe resistancebetweeninjector2P NO Updatethe ECM if it does not have the latest software,or substitutea known-goodECM.then recheck(seepage 1'l-6).lf the symptom/indication goes away with a known-goodEClvl,replacethe originaE l CM.I 4 1 .Turn the ignition switch OFF. c o n n e c t otre r m i n a l sN o . 1 a n d N o . 2 . 42. Removethe enginecover. INJECTOB2P CONNECTOR 43. Disconnectthe injector2P connectorfrom the p r o b l e mc y l i n d e r . 4 4 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) Terminal side of male terminals l s t h e r e 1 0Q 13A? YES-Go to step 36. NO Replace t h e i n j e c t o r( s e ep a g e11 -1 1I ) .t (cont'd) 11-75 PGM-FISystem DTCTroubleshooting(cont'dl 45. Measure voltagebetweeninjector2Pconnector t e r m i n aNl o .1 a n db o d yg r o u n d . 48. Connectinjector2PconnectorterminalNo.2to bodygroundwith a jumperwire {seetable). INJECTOR 2P CONNECTOR INJECTOR2P CONNECTOR tll-z] -lt,o,,"=rrrr*, oI tll-Z-l -]_r-l_rNJ IJUMPER IwrBE Wiresideof femaleterminals Wire side of {emaleterminals ls there battery voltage? YES-Go to step 46. NO-Repair open in the wire betweenthe injector l a i n r e l a yl . l a n d t h e P G M - Fm PROBLEM CYLINDER No.1 No.2 N o .3 N o .4 DTC WIRECOLOR P0301 P0302 P0303 P0304 BRN RED BLU YEL 46. Turn the ignitionswitch OFF. 4 7 .Checkfor continuitybetweenbody ground and 49. Checkfor continuitybetweenbody ground and ECMconnectorterminal (seetable). ECMconnectorterminal (seetable). ECM CONNECTORB I24P) a B {24P) ECMCONNECTOR Wire side oJtemaleterminals W i r es i d eo f f e m a l et e r m i n a l s PROBLEM CYLINDER N o .1 No.2 No.3 N o .4 ECM TERMINAL P030'1 B5 B4 P0302 P0303 B3 P0304 82 DTC WIRE COLOR BRN RED BLU YEL PROBLEM CYLINDER No.1 N o .2 N o .3 N o .4 DTC P0301 P0302 P0303 P0304 ECM TERMINAL B5 B4 B3 82 WIRE COLOR BRN RED BLU YEL ls therc continuity? ls there continuity? YES Replacethe injector,then recheck.l YES-Repair short in the wire betweenthe ECM a n dt h e ; n j e c t o r . I N O - G o t o s t e p4 8 . 11-76 NO Repairopen in the wire betweenthe ECM and the injector.I I DTGP0325:Malfunctionin KnockSensor Circuit 1 . R e s e t h e E C M( s e ep a g e1 1 - 4 ) . 7. Connectstanersubharness 6Pconnector terminal r ire. N o .5 t o b o d yg r o u n dw i t ha j u m p e w STARTER SUAHARNESS 6P CONNECTOR 2. Startthe engine.Hold the engineat 3,000rpm with no load (in neutral)until the radiatorfan comes on, then let it idle. 3. Holdthe engineat 3,000-4,000 rpm for at least 60 seconds. l1l213l l._, / l 5 l 6 l KS IJUMPER |RED/BLU) IW|RE I ls DTC P0325 indicated? Wiresideof femaleterminals YES-Go to step 4. NO Intermittentfailure,system is OK at this time. Checkfor poor connectionsor looseterminalsat the knocksensorand at the ECM.I 8 . Checkfor continuitybetweenbodygroundand ECMconnector terminalA9. ECMCONNECTOR A {31PI 4. Turn the ignition switch OFF. 5. Disconnectthe startersubharness6P connector. 6. Checkfor continuitybetweenECMconnector terminalAg and body ground. ECMCONNECTOR A 131P) Wire side of female terminals ls there continuity? YES-Go to step 9. NO Repairopen in the wire betweenthe ECM (A9) and the startersubharness6P connector.l Wire side of lemaleterminals 9 . Checkthe startersubharnessbetweenthe 6P ls therecontinuity? YES-Repairshortin thewire betweenthe ECM (A9)andthe startersubharness 6Pconnector.l NO Goto step7. connectorand the knocksensorfor an open or short. lf it's OK, substitutea known-goodknock sensorand recheck. ls DTC P0325 indicated? YES Updatethe ECM if it does not have the latest software.or substitutea known-goodECM,then recheck{seepage '11-6). lf the sym ptomlindication goes away with a known good ECM,replacethe originaE l CM.I NO Replace t h e o r i g i n a kl n o c ks e n s o ra n d / o r starter subharness.l 11-77 PGM-FISystem DTCTroubleshooting(cont'd) DTCP0335:CKPSensorNo Signal DTCP0336:CKPSensorIntermittent Interruption 7. Measurevoltage betweenCKPsensor3P connector t e r m i n a lN o , 1 a n d b o d y g r o u n d CKPSENSOR3P CONNECTOR '1-4). '1. Reset the ECM (seepage 1 2. Start the engine. ls DTC P0335 and/or P0336 indicated? YES Go to step 3. Wire side of female tefminals NO Intermittentfailure,system is OK at this time. Checkfor poor connectionsor looseterminalsat t h e C K Ps e n s o ra n d a t t h e E C M . I ls thereabout5 V? 3. Turn the ignition switch OFF. YES Goto stepL 4. Disconnectthe CKPsensor3P connector. N O G ot o s t e p1 0 . 5. Turn the ignitionswitch ON {ll). 6. Measurevoltage betweenCKPsensor3P connector t e r m i n a lN o . 3 a n d b o d y g r o u n d . voltagebetweenCKPsensor3Pconnector 8. Measure t e r m i n a lN s o . 2a n dN o .3 . CKPSENSOR3PCONNECTOR CKPSENSOR3PCONNECTOF ,llYtL IGP 1 2 3 (YEL/BLK} a L " l LGl {BRN/YELI ( W i r e s i d eo f f e m a l et e r m i n a l s Wiresadeof femaleterminals ls there battery voltage? YES Go to step 9. Is therebattery voltage? YES- Goto step7. NO Repairopenln thewire betweenPGM-Flmain r e l a y1 a n dt h eC K Ps e n s o r . ! NO Repairopen in the wire betweenthe CKP s e n s o ra n d G 1 0 1. I 9. Substitutea known-goodCKPsensorand recheck. ls DTC P0335 and/or P0336 indicated? YES Updatethe ECM if it does not have the latest software.or substitutea known good ECM,then recheck{seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CM.I t h e o r i g i n aC l K Ps e n s o r . l NO Replace 11-78 a '10.l\4easure voltagebetweenECMconnector terminal A7 andbodyground, ECMCONNECTOR A 13lPI Wiresideot femaleterminals ls there about 5 V? YES-Repair open in the wire betweenthe ECM (A7)and the CKPsensor.t N O - G o t o s t e p1 1 . 1 1 .Turn the ignitionswitch OFF. DisconnectECMconnectorA (31P) 1 3 . Checkfor continuitybetweenECMconnector terminal 47 and body ground. ECMCONNEfiORA (31P) Wiresideof femaleterminals ls there continuity? YES-Repair short in the wire betweenthe ECM (A7)and the CKPsensor.t NO Updatethe ECM if it does not have the latest software.or substitutea known-goodECI\4,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CM.t 11-79 PGM-FlSystem DTCTroubleshooting(cont'dl DTCP0500:VSSCircuitMalfunction 9. Turn the ignitionswitch OFF. 1. Test-drivethe vehicle. 10. DisconnectECMconnectorA (3'1P). 2. Checkthe vehiclespeedwith the scantool. 11 . T u r nt h e i g n i t i o ns w i t c hO N { l l } . ls the correct speed indicated? YES-lntermiftent failure,system is OK at this time. Checkfor poor connectionsor looseterminalsat t h e V S Sa n d a t t h e E C M . I NO Go to step 3. 12. Blockthe right front wheel. and slowly rotatethe left front wheel. '!3. lMeasurevoltage betweenECMconnector t e r m i n a l sA 1 8 a n d A 2 4 . A I31PI ECMCONNECTOR 3. Turn the ignition switch OFF. 4. Blockthe rearwheels,and set the parkingbrake. 5. Raisethe front ofthe vehicle,and make sure it is securelysupported, 6 . Turn the ignition switch ON (ll). 1 . Blockthe right front wheel, and slowly rotatethe left front wheel. 8. Measurevoltage betweenECMconnector t e r m i n a l sA 1 8 a n d A 2 4 . A {31P) ECMCONNECTOR Wiresideof femaleterminals Does the voltage pulse between 0 V and 5 V ol between0V and battety voltage? YES Updatethe ECM if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe origlnaE l CM.I NO Checkthese items: . A short or an open in the wire betweenthe ECM ( A 1 8 )a n d t h e V S S . I . l f t h e w i r e i s O K , t e s t t h e V S S( s e ep a g e2 2 7 1 ) . 1 Wiresideof femaleterminals Does the voltage pulse between 0 V and 5 V or between 0V and battery voltage? YES-Update the ECM if it does not havethe latest software,or substitutea known-goodECM.then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CN4.l NO Go to step 9. 11-80 DTCP0563:ECMPowerSourceCircuit Unexpected Voltage 9 . Removethe glove box (seepage20-63). 1 0 .Removethe PGM-FImain relay 1 (A7. 1 . R e s e t h e E C I \ {4s e ep a g el 1 - 4 } . 2. Turn the ignitionswitch OFF. 3. Wait 5 seconds. 4 . T u r nt h e i g n i t i o ns w i t c hO N { l l l . ls DTC P0563 indicated? YES Go to step 5. NO-lntermiltent failure,system is OK at this time. Checkfor poor connectionsor looseterminalsat t h e N o . 6 E C U( E C M ){ 1 5A ) f u s ei n t h e u n d e r - h o o d fuse/relaybox and at the ECM.I 1 1 .Checkfor continuitybetweenECMconnector terminal E7 and body ground. Turn the ignitionswitch OFF. ECMCONNECTOR E 131P) 6 . DisconnectECI\4connectorE {31P). MRLY {RED/YEL) 7 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . 8 . lvleasurevoltagebetweenECMconnectorterminal E7 and body ground. ECMCONNECTOR E {31P} MRLY Wiresideof {emaleterminals ls there continuity? YES-Repair short in the wire betweenthe ECM l a i n r e l a y1, I { E 7 )a n d t h e P G M - Fm Wiresideol remaleterminals NO Replace t h e P G M - Fm l a i n r e l a y1 . 1 tt. ls there battery voltage? Turn the ignition suitchOFF. '13.R e c o n n e cEt C M c o n n e c t oE r (31P). YES Go to step 12. NO Go to step 9. (conl'd) 11-81 PGM-FISystem DTCTroubleshooting(cont'dl 14. Measurevoltage betweenECMconnectorterminal E7 and body ground. 1 8 .Removethe glove box (seepage 20-63). 1 9 .Removethe PGM-FImain relay '1{A). ECMCONNECTORE 13lPI MRLY IBEO/YEL) W i r es i d eo f f e m a l et e r m i n a l s ls there battery voltage? YES Go to step 15. NO-Update the ECM if it does not have the latest software,or substitutea known-goodEClvl,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe o r i g i n aE l CM.I 1 5 . DisconnectECI\4connectorA (31P). to. 20. Measure voltage between body ground and ECM connector terminals A3 and A2 individually. ECMCONNECTOR A {31PI IGP2 (YEL/BLK) IGP1 (YEL/BLK) T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . 1 7 . Measurevoltage betweenbody ground and ECIM c o n n e c t otre r m i n a l s4 3 a n d4 2 i n d i v i d u a l l y . ECMCONNECTOR A {3.IP) IGP2 (YEI./BLX) IGP1 (YEL/BLKI Wiresideof femaleterminals I s there battery v oltage? YES Repairshortto power in the wire between ( A 2 . A 3a) n d t h e P G M - Fm the ECI\4 l a i n r e l a y1 . 1 W i r es i d eo f f e m a l el e r m i n a l s ls there battery voltage? YES-Go to step 18. NO Updatethe ECM if it does not havethe latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originalECM/PCl\4.1 11-82 N O R e p l a c e t h eP G M F l m a i n r e l a y1 . ! DTGPl106:BAROSensorRange/Perfomance Problem 1 . R e s e t h e E C M( s e ep a g e1 1 - 4 ) . 2. Startthe engine.Holdthe engineat 3,000rpm with no load (in neutral)until the radiatorfan comes on, then let it idle. DTCPl107:BAROSensorCircuitLowVoltage DTCPl108:BAROSensorCircuitHigh Voltage 1 . R e s e t h e E C M{ s e ep a g e11 - 4 ) . 2. Turn the ignition switch ON (ll). Test-drivewith the transmissionin 4th gear. l s D T C P 1 1 0 7o r P 1 1 0 8i n d i c a t e d ? Acceleratefor 5 secondsusingwide open throttle. YES-Update the ECM if it does not havethe iatest software,or substitutea known-goodECI\4, then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CI\4.I Checkfor a TemporaryDTCwith the scantool. Is TemporaryDTC Pl106 indicated? YES-Update the ECM if it does not have the latest software,or substitutea known-goodECM.then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe o r i g i n aE l C M !. NO- Intermittentfailure,system is OK at this trme.l NO Intermittentfailure,system is OK at this time.I 11-83 PGM-FISystem DTGTroubleshooting(cont'dl DTCPl157:Ay'F Sensor(Sensor1)Range/ Performance Problem 1 . R e s e t t h eE C I M( s e ep a g e1 1 - 4 ) . L 6. Checkfor continuitybetweenECMconnector t e r m i n a l4s6 a n dA 1 6 . ECMCONNECTOR A {3IP) 2. Startthe engine. ls DTC Pl157 indicated? YES-Go to step 3. NO Intermittentfailure,system is OK at this time. Checkfor poor connectionsor looseterminalsat the Ay'Fsensor(Sensor1) and at the ECN4.I Wire side of femaleterminals 3 . Turn the ignitionswitch OFF. Disconnectthe Ay'Fsensor(Sensor1) 4P connector a n d E C Mc o n n e c t oA r (31P). ConnectA,/Fsensor(Sensor1) 4P connector t e r m i n a l sN o . 1 a n d N o . 2 w i t h a j u m p e rw i r e . ls therecontinuity? YES Goto step9. NO Goto step7. (SENSOR A/F SENSOR 1) 4PCONNECTOR 7 . Connect A/Fsensor(Sensor1)4Pconnecror r ire. t e r m i n aNl o .1 t o b o d yg r o u n dw i t ha j u m p e w AFS+ {BLU) ( A/F SENSOR{SENSOR1I 4P CONNECTOR JUMPERWIRE Wire side of femaleterminals Wire side ot femaleterminals ( 11-84 8. Checkfor continuitybetweenECMconnector terminals46 andbodyground. A 131P} ECMCONNECTOR DTCPl158:Ay'F Sensor(Sensor1)AFSTerminalLowVoltage 1 . R e s e t t h eE C M( s e ep a g e1 1 - 4 ) . 2. Startthe engine. ls DTC P1158 indicated? YES Go to step 3. NO-lntermittent failure,system is OK at this time Checkfor poor connectionsor loosetermanalsat the Ay'Fsensor(Sensor1) and at the ECIMI Wire side ol lemaleterminals 3. Turn the ignition switch OFF. ls there continuity? YES-Repair open in the wire betweenthe Ay'F sensor(Sensor1) and the ECM(416).1 NO-Repair open in the wire betweenthe Ay'F sensor(Sensor1) and the ECM (46).1 4, DisconnecttheAy'Fsensor(Sensor1) 4P connector, r (31P). a n d E C Mc o n n e c t oA 5. Checkfor continuitybetweenECMconnector termina4 l 1 6 a n d b o d yg r o u n d . A (31P) ECMCONNECTOR 9 . Substitutea known-goodAy'Fsensor(Sensor1) and recheck. ls DTC P1157 indicated? YES- Updatethe ECM if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).if the symptom/indication goes away with a known-goodECM,replacethe original ECM.! Wire side oJfemaleterminals NO- Replacethe Ay'Fsensor{Sensor1).! ls thete continuity? YES-Repair shon in the wire betweenthe A,/F s e n s o r( S e n s o r1 ) a n dt h e E C M( A 1 6 ) . 1 NO Go to step 6. ' c o n td ) 11-85 PGM-FISystem DTCTroubleshooting(cont'd) 6. Substitutea known-goodAy'Fsensor(Sensor1)and recheck. ( DTCPl159:A,/FSensor(Sensor1)AFS + TerminalLowVoltage Is DTC P1158 indicated? 1 . R e s e t t h eE C M( s e ep a g e1 1 - 4 ) . YES Updatethe ECM if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).if the symptom/indication goes away with a known-goodECM,replacethe originaE l CM.I 2. Start the engine. NO- Replacethe Ay'Fsensor(Sensor1).t ls DTC P1159 indicated? YES-Go to step 3. NO-lntermiftent failure.system is OK at this time. Checkfor poor connectionsor looseterminaisat the A,/Fsensor(Sensor1) and at the ECM.I 3. Turn the ignition switch OFF. 4. Disconnectthe Ay'Fsensor(Sensor1) 4P connector a n d E c M c o n n e c t oA r (31P). 5. Checkfor continuitybetweenECMconnector terminal 46 and body ground. ECMCONNECTOR A {31PI Wire side of femaleterminals ls therecontinuity? YES-Repairshortin thewire between the Ay'F s e n s o(rS e n s o1r )a n dt h eE C M( A O ) . I NO Goto step6. 11-86 a 6. Substitutea known-goodAy'Fsensor(Sensor1i and recnecK. l s D T C P 1 1 5 9i n d i c a t e d ? YES-Update the ECM if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).if the symptom/indication goes away with a known-goodECN4, replacethe o r i g i n aE l CM.I NO Replace t h e A y ' Fs e n s o r( S e n s o r1 ) . 1 11-87 PGM-FISystem DTCTroubleshooting(cont'dl DTCPl163:Ay'FSensor(Sensor1) Slow Response NOTE:lf DTCP1162is storedat the same time as DTC P1163.troubleshootDTCP1162first, then recheckfor D T CP 1 1 6 3 . 1 . R e s e t h e E C M( s e ep a g e11 - 4 ) . 2. Startthe engine.Hold the engine at 3,000rpm with no load (in neutral)until the radiatorfan comes on. 3. Test-driveunderthe following conditions: . 55 mph (89 km/h) steadyspeed ' Transmissionin sth gear ' Until the Ay'Fsensorreadinesscode or TemporaryDTCPl163 comes on 4. Checkfor a TemporaryDTCwith the scantool. ls Temporary DTC P 1163indicated? YES Replacethe Ay'Fsensor(Sensor1).I NO Intermittentfailure, system is OK at this time. Checkfor poor connectionsor looseterminalsat the A'lFsensor (Sensor1) and at the ECM.t 11-88 DTCPl164:A,/FSensor(Sensor1)Circuit Range/Performance Problem ( s e ep a g e1 t - 4 ) . 1 . R e s e t t h eE C I \ 4 2 . S t a r tt h e e n g i n e .H o l d t h e e n g i n e a t 3 , 0 0r0p m w i t h no load (in neutral)until the radiatorfan comes on, 3. Test-drivein 3rd gear.Startingat 1,600rpm, accelerateusing wide open throttlefor at least 5 seconds.Then deceleratefor at least5 seconds with the throttle completelycloseduntil the A,/F sensorreadinesscode is set to completeor TemporaryDTCP1164comes on. 4. Checkfor a TemporaryDTCwith the scantool. ls TemporaryDTC P1164indicated? YES- Replacethe A,,/F sensor(Sensor1).I NO Intermittentfailure,system is OK at this time. Checkfor poor connectionsor looseterminalsat the Ay'Fsensor relay,at the Ay'Fsensor(Sensor1), a n da t t h e E c M . l Sensor(Sensor1)Heater DTCPl166:Ay'F CircuitMalfunction 1 . R e s e t t h eE C M( s e ep a g e1 1 - 4 ) . 2. Startthe engine. Is therc battery voltage? YES-Update the ECM if it does not have the latest soflware,or substitutea known-goodECM.then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe o r i g i n aE l CM.I ls DTC P1166indicated? NO-Go to step 5. YES-Go to step 3. NO-lntermittent failure,system is OK at this lime. Checkfor poor connectionsor looseterminalsat the Ay'Fsensorrelay,the A,/Fsensor(Sensor1),and t h e E c M .! 5. MeasurevoltagebetweenECMconnector terminalsA22 and A24. A {31P} ECMCONNECTOR 3. Checkthe following fuse: . No. 14 OPTION(30A)fusein under-hoodfuse/ rerayDox. . No. 2*B LAF (Ay'F) HEATER(20A)fuse in underdash fuse/relaybox. . No. 4 ACG (10A)in underdash fuse/relaybox. Are any of the fuses blown? Wire side of femaleterminals YES Repairshort in the wire betweenthe Ay'F sensorrelay and the fuses.I ls therebattery voltage? NO Go to step 4. YES Goto step6. 4. MeasurevoltagebetweenECMconnector terminalsA1 and A24. 30 secondsafter the ignition s w i t c hi s t u r n e dO N ( l l ) . A I31P) ECMCONNECTOR N O - G o t o s t e p1 0 . 6. Turnthe ignitionswitchOFF. E (31P). 7. Disconnect ECMconnector s w i t c hO N{ l l ) . 8 . T u r nt h ei g n i t i o n W i r es r d eo f l e m a l et e r m i n a l s (cont'd) 11-89 PGM-FISystem DTCTroubleshooting(cont'dl 9. ConnectECMconnectorterminal EStobody ground with a jumper wire, then measurevoltage betweenECMconnectorterminalsA1 and 424. ls there continuity? YES Repairshort in the wire betweenthe A|/F sensorrelay,A,/Fsensor{Sensor1) and ECM lA22J.a ECMCONNECTORS NO Go to step 13. t5. Turn the ignition switch ON (ll). 1 4 . Measurevoltage betweenECMconnector terminalsE8 and A24. ECM CONNECTORS Wire side of femaleterminals E {31P) ls there battery voltage? YES- Updatethe ECM if it does not have the latest soflware,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l C M t. a {31P) Wiresideof femaleterminals NO Repairopen in the wire betweenthe Ay'F r ) a n d E C M( A 1 ) t. s e n s o r( S e n s o 1 1 0 .Turn the ignitionswitch OFF. 1 1 .Disconneclthe ECfMconnectorA (31P)and the Ay'F sensor(Sensor1) 4P connector. 1 2 . Checkfor continuitybetweenthe Ay'Fsensor ( S e n s o r1 ) 4 Pc o n n e c t otre r m i n a lN o . 3 a n d b o d y ground. ls there battety voltage? YES-Repair open in the wire betweenthe ECM (A22)and the IVF sensor(Sensor1).I N O - G o t o s t e p1 5 . Checkfor continuityin the wires betweenthe Ay'F sensorand the fuses. ls there continuity? (SENSOR A/F SENSOR 1)4PCONNECTOR YES-The wires are OK. Replacethe A,/Fsensor relay.l NO Repairopen in the wire betweenthe Ay'F sensorrelay and the fuses.l Wire side ot Iemaleterminals 11-90 Sensor(Sensor1)Heater DTCPl167:Ay'F CircuitMalfunction NOTE:lf DTCP1162is storedat the same time as DTC P1167,troubleshootDTCP1162first, then troubleshoot D T CP 1 1 6 7 . 1 . R e s e t t h eE C I \ (4s e ep a g e1 1 - 4 ) 6. Checkfor continuitybetweenECMconnector t e r m i n a l s, 4 6a n d 4 1 6 . A {31P) ECMCONNECTOR AFS- {RED) trTzTil,ilsl l t t8 9 2C21 l?rlzsIels 2. Startthe engine.Wait for at least80 seconds. AFS ls DTC P01167 indicated? IRED/YEL) YES Go to step 3. Wire side of lemale terminals NO-lntermittent failure,system is OK at this time. Checkfor poor connectionsor looseterminalsat the Ay'Fsensorrelay,at the Ay'Fsensor(Sensor1), a n da t t h e E C M . I ? Turn the ignitionswitch OFF. Disconnectthe A,/Fsensor4P connectorand ECM connectorA (31P). ls thetecontinuity? h eA / Fs e n s o(rS e n s o1r ) . 1 Y E S - R e p l a ct e NO-Repairopenin thewire betweenthe Ay'F s e n s o(rS e n s o1r) a n dt h eE C M( 4 6o r A 1 6 ) . I 5 . Connectthe Ay'Fsensor(Sensor1) 4P connector t e r m i n a l sN o . 2 a n d N o . 1 w i t h a j u m p e rw i r e . A/F SENSOR(SENSOR1) 4P CONNECTOR JUMPERWIRE Wire side of f e m a l et e r m i n a l s 11-91 PGM-FISystem I DTCTroubleshooting(cont'dl DTCPl297:ELDCircuitLowVoltage 1 . R e s e t h e E C M{ s e ep a g e1 1 - 4 ) . 2. Startthe engine. 8. Turn the ignition switch OFF. 9. DisconnectECMconnectorE {31P). 10. Checkfor continuitybetweenbody ground and E C Mc o n n e c t otre r m i n a lE 1 5 . 3 . T u r no n t h e h e a d l i g h t s . ECMCONNECTOR E 131PI ls DTC P1297 indicated? I l 2 l 34 5 6 1 7 YES Go to step 4. to NO Intermittentfailure,system is OK at this time. Checkfor poor connectionsor looseterminalsat t h e E L Da n d a t t h e E C M . I ,2 2al2/ tA 7\' td 8 I / 12021 31 ELD (GRN/RED} 4. Turn the ignition switch and the headlightsOFF. 5. DisconnecttheELD3P connector. Wire side of femaleterminals 6. Turn the ignition switch ON {ll). ls there continuity? 7. Measurevoltage betweenbody ground and ELD3P connectorterminal No. 3. ELO3P CONNECTOB Z 3 ELD{GRN/REDI Wire side of femaleterminals ls thereabout5 V? YES Replace the ELD.t N O - G o t o s t e p8 . 11-92 YES-Repair short in the wire betweenthe ECM ( E1 5 )a n d t h e E L D r. NO- U pdatethe ECM if it does not havethe latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe o r i g i n aE l CM.I a DTCPl298:ELDCircuitHighVoltage 1 . R e s e t t h eE C M( s e ep a g e1 1 - 4 ) 8. T u r nt h e i g n i t i o ns w i t c hO F F . 9 . ConnectELD3P connectorterminal No. 3 to body g r o u n dw i t h a j u m p e rw i r e . 2. Stan the engine. ELD3P CONNECTOR 3. Turn on the headlights. ---F------- ls DTC P1298 indicated? l 1 l 2: r l ELD (GRN/RED) YES-Go to step 4. wrRE IJUMPER NO- Intermittentfailure.system is OK at this time. Checkfor poor connectionsor looseterminalsat t h e E L Da n d a t t h e E C M . I 4. Turn the ignition switch and headlightsOFF. 5. DisconnecttheELD3P connector. I I Wire side of temaleterminals 1 0 .DisconnectECMconnectorE (31P). 6. Turn the ignition switch ON (ll). 1 1 .Checkfor continuitybetweenbody ground and 7. Measurevoltagebetweenbody ground and ELD3P connectorterminal No. 1. ELD3PCONNECTOR ECMconnectorterminal E15. E 131PI ECMCONNECTOR 1 2 1 34 5 IG1IBLK/ORNI 14 L C 22123 24 I I 6 l / 1 8 2C 21 21./ 2Q 30 J o t / ELD i1' IGRN/RED) Wire side of femaleterminals Wire side ot {emaleterminals Is thetecontinuity? ls there battery voltage? Y E S - G ot o s t e p1 2 . YES-Go to step 8. N O - C h e c k t h e N o . 4 A C G ( 1 0 A ) f u s ei n t h e u n d e r dash fuse/relaybox. lf the fuse is OK, repairopen in the wire betweenthe No. 4 ACG (10A)fuse and the ELD.I NO Repairopenin thewire betweenthe ECM ( E 1 5a) n dt h eE L D . (cont'd) 11-93 PGM-FISystem DTCTroubleshooting(cont'dl 12, Checkfor continuitybetweenELD3P connector t e r m i n a lN o . 2 a n d b o d y g r o u n d . E L D 3 PC O N N E C T O R W i r e s i d eo f f e m a l et e r m i n a l s ls there continuity? YES Go to step 13. NO- Repairopen in the wire betweenthe ELDand G 2 0 1I. Reconnectthe ELD3P connectorand ECM connectorE (31P). 1 4 . Startthe engineand let it idle. t5_ While measuringvoltage betweenECMconnector t e r m i n a l s4 2 4 a n d E 1 5 ,t u r n t h e h e a d l i g h t os n t hi g h ) . ECM CONNECTORS W i . e s i d eo f f e m a l et e r m i n a l s Does the voltage drop? YES-Update the ECM if it does not have the latest software,or substitutea known-goodECM,then recheck{seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CM.I NO Replace the ELD.I 11-94 DTCPl361:CamshaftPosition(CMP)Sensor B (TDCSensor)Intermittent Interruption DTCPl362:CamshaftPosition(CMP)Sensor B (TDCSensor)No Signal 7. l\4easure voltage betweenCMP sensorB {TDC sensor)3P connectorterminal No. 1 and body ground. CMP S€NSOR 8 ITDCSENSOR)3P CONNECTOR 1 . R e s e t h e E C M( s e ep a g e1 1 - 4 ) . 2. Startthe engine. ls DTC P1361and/or P1362 indicated? YES Go to step 3. Wlres de ollemaleterminals NO- Intermittentfailure.system is OK at this time. Checkfor poor connectionsor looseterminalsat t h e C M Ps e n s o rB ( T D Cs e n s o r a ) n da tt h e E C M . I ls thereabout5 V? YES-Go to step8. 3 . Turn the ignitionswitch OFF. N O - G o t o s t e p1 0 . 4 . DisconnecttheCMP sensorB (TDCsensor)3P voltagebetweenCl\ilPsensorB (TDC 8. Measure s e n s o r3)Pc o n n e c t ot er r m i n a lN s o .2 a n dN o ,3 . connector. 5 . Turn the ignitionswitch ON (ll). CMPSENSON B llOC SENSOfi)3P CONNECTOF 6 . Measurevoltage betweenCMP sensorB (TDC sensor)3P connectorterminal No. 3 and body grouno. B {TDCSENSOR) CMPSENSOR 3PCONNECTOR IGP 1 2 3 {YEL/BLK} Wire s de olfema etefminals ls there battery voltage? Y E S - G o t o s t e p9 . NO Repairopen in the wire betweenthe CMP ) n dG 1 0 1 . 1 s e n s o rB ( T D Cs e n s o r a Wiresideol temaleterminals 9. Substitutea known-goodCMP sensorB (TDC sensor)and recheck. ls there battety voltage? ls DTC P1361and/or P1362 indicated? YES Go to step 7. YES Updatethe ECMif it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CM.I NO-Repair open in the wire betweenthe PGM-Fl m a i n r e l a y1 a n dt h e C M Ps e n s o rI ( T D Cs e n s o r ) . I NO Replace theoriginaC l MPsensorB(TDC sensor).1 (cont'd) 11-95 PGM-FISystem (cont'd) DTCTroubleshooting 10. MeasurevoltagebetweenECI\4 connectorterminal A26andbodyground. ECMCONNECTOR A (31P) 1 2 3 4 5 6 1 7 I 0 1 11 2 1 . / 61,/18 I 2C2l 2324 21m 30 TDC {GRN} Wire side oI temaleterminals ls thereabout5 V ? YES- Repairopenin thewire betweenthe ECM (426)and CMPsensorB (TDCsensor).1 DTCPl607:Malfunction in ECMInternal Circuit 1. ResettheEC|\illsee page 11-4). 2 , T u r nt h e i g n i t i o ns w i t c hO N ( l l ) ,a n d w a i t f o r 40 seconds. ls DTC P 1607 indicated? YES Updatethe ECM if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11 6). lf the symptom/indication goes away with a known-goodECM,replacethe o r i g i n aE l CM.I NO Intermittentfailure,system is OK at this time. A low batterycan causethis problem . Ask the customerif there has been any recenttrouble s t a r t i n gt h e e n g i n e . l N O - G o t o s t e p1 1 . 1 1 .Turnthe ignitionswitchOFF. 1 2 . Disconnect ECIM A (31P) connector Checkfor continuitybetweenECMconnector terminal426 andbodyground. ECMCONNECTOR A {31PI Wiresideof femaleterminals ls there continuity? YES Repairshort in the wire betweenthe ECM (426)and the CMP sensor B (TDCsensor).1 NO Updatethe ECM if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CM.I 11-96 \ MIL CircuitTroubleshooting 1. Connectan OBD ll scantool/HondaPGM Tester ( s e ep a g e1 1 - 3 ) . 2. Turn the ignition switch ON (ll) and readthe OBD ll scantool/HondaPGM Tester. Does the OBD ll scan tool/Honda PGM Tester communicatewith the ECM? YES Go to step 3. " NO Go to troubleshooting DLCCircuit T r o u b l e s h o o t i n g (" s e ep a g e1 1 - 1 0 9 ) . . A l o o s eN o . 1 7 F U E LP U M P( 1 5 A ) f u s ei n t h e under-dashfuse/relaybox. . A p o o rc o n n e c t i o n l 31. a t E C Mt e r m i n a E . An intermittentopen in the GRN/ORNwire ) n d t h e g a u g ea s s e m b l y . b e t w e e nt h e E C M( E 3 1 a . An intermittentshort in the wire betweenthe ECM(A21)and the manifold absolutepressure ( M A P )s e n s o r . . An intermittentshort in the wire betweenthe ECI\4(A20)and the throttle posilion (TPisensor. . An intermittentshort in the wire betweenthe ECM (E5)and the fuel tank pressure(FTP)sensor. 6. Turn the ignition switch OFF. 3. Checkthe OBD ll scantool/HondaPGM Testerfor DTCs. 7 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . Are any DTCs indicated? ls the low oil pressure light on? YES Go to the DTCTroubleshootingIndex. YES Go to step 10. NO-Go to step 4. N O - G o t o s t e p8 . 4. Turn the ignitionswitch OFF. 5 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) a n dw a t c ht h e l M a l f u n c t i oIn d i c a t oLr a m p( M l L ) . 8 . I n s p e c t t h eN o . 1 0 l \ 4 E T E(R7 . 5 A ) f u s ei n t h e u n d e r dash fuse/relaybox. ls the luse OK? Does the MIL come on and stay on for more than 20 secondsaftet turning the ignition switch YES Go to step L oN (tr)? N O R e p a i rs h o n i n t h e w i r e b e t w e e nN o . 1 0 M E T E R( 7 . 5 A ) f u s e a n d t h e g a u g ea s s e m b l yA. l s o r e p l a c e t h eN o . 1 0 M E T E R{ 7 . 5 A f) u s e . l YES lf the MIL alwayscomes on and stayson, go to step 76. But if the lMlLsometimesworks normally,first checkfor these problems. . An intermittentshort in the wire betweenthe ) n dt h e d a t al i n kc o n n e c t o(rD L C ) . E C I M( E 2 9 a . An intermittentshort in the wire betweenthe ) n dt h e g a u g ea s s e m b l y . E C M( E 3 1 a NO lf the MIL is alwaysoff, go to step 6. But if the lvllLsometimesworks normally,first checkfor these problems. . A l o o s eN o . 1 0 M E T E R( 7 . 5 A f)u s ei n t h e u n d e r dash fuse/relaybox. . A l o o s eN o . 2 0 l G ( 4 0 A )( C a n a d a5: 0 A ) I u s ei n t h e under-hoodfuse/relaybox. . A i o o s eN o . 6 E C U( E C M )( 1 5 A )f u s ei n t h e u n d e r hood fuse/relaybox. 9. Inspectthe No. 20 lG1 (40A)(Canada:50A)fuse in the under-hoodfuse/relaybox. ls the f use OK? YES Repairopen in the wire betweenthe No. 20 l G ( 4 0 A ){ C a n a d a5r0 A ) f u s ea n d t h e g a u g e assembly.lf the wire is OK, test the ignition switch {seepage 22 53). N O R e p a i rs h o r ti n t h e w i r e b e t w e e nN o . 2 0 l G ( 4 0 A )l C a n a d a5: 0 A ) f u s ea n d t h e u n d e r ' d a s h fusel r e l a yb o x .A l s o r e p l a c et h e N o . 2 0 l G ( 4 0 A i ( C a n a d a5: 0 A )f u s e . I (conr'd) 11-97 PGM-FISystem MIL CircuitTroubleshooting(cont'dl 1 0 .Tryto startthe engine. to. Removethe blown No. 6 ECU{ECfU)(154)fuse from the under-hoodfuse/relaybox. Doesthe enginestart? 1 7 . Removethe glove box (seepage 20-63)and the P G M ' F Im a i n r e l a y1 . Y E S - G ot o s t e p1 1 . N O - G o t o s t e p1 4 . 1 1 .Turnthe ignitionswitchOFF. 12. ConnectECMconnector terminalE31to body groundwith a jumperwire. ECMCONNECTOR E 13lPI l l 2 l 34 5 6 1 7 l1 8I 4 1 5161,/118 2( 2t 2' 23 24 z7l/ 129 31 JUMPER MIL (GRN/ORN} WIRE 1 8 . Checkfor continuitybetweenbody ground and P G M - Fm l a i n r e l a y1 4 P c o n n e c t otre r m i n a l sN o . 2 a n d N o .4 i n d i v i d u a l l v . PGM-FIMAIN RELAY1 4P CONNECTOR Wire side of femaleterminals Turn the ignition switch ON (ll). ls the M lL on? YES Updatethe ECM if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECIM,replacethe o r i g i n aE l CM.I NO-Check for an open in the wire betweenthe ) n d t h e g a u g ea s s e m b l yA. l s o c h e c kf o r E C M( E 3 1 a a b l o w nM I L b u l b .l f t h e w i r e sa n d t h e b u l ba r e O K , replacethe gauge assembly.l 't4. Turn the ignltion switch OFF, f V (wHr/ B v) BLK)( IA W r r es r d eo l l e m a l et e r m r n a l s ls there continuity? Y E S - R e p a i rs h o r ti n t h e w i r e b e t w e e nt h e N o . 6 ) 5 A )f u s ea n d t h e P G M - Fm E C U( E C l \ 4( 1 l a i n r e l a y1 . A l s o r e p l a c et h e N o . 6 E C U( E C M )( 1 5 A )f u s e . l N O - G o t o s t e p1 9 . (15A)fuse in the 1 5 . Inspectthe No. 6 ECU (ECIM) under-hoodfuse/relaybox. ls the f use OK? YES-Go to step 22. N O - G o t o s t e p1 6 . 11-98 19. Disconnecteach of the componentsor the connectorsbelow, one at a time, and checkfor continuitybetweenPGM-FImain relay 1 4P connectorterminal No. 1 and body ground. 21. Checkfor continuitybetweenPGM-FImain relay 1 4P connectortermlnal No. 1 and body ground. PGM-FIMAIN RELAY1 4P CONNECTOR . . . . . PGfvl-Flmain relay 2 ECMconnectorA (31P) Eachinjector2P connector ldle air control (lAC)valve3P connector CamshaftPosition(CMP)sensorB (Topdead center(TDC)sensor)3P connector . Crankshaftposition(CKP)sensor3P connector PGM-FIMAIN RELAY1 4PCONNECTOR Wire side of femaleterminals ls there continuity? YES Repairshort in the wire betweenthe PGM-Fl main relay 1 and each item. Also replacethe No. 6 E C U{ E C M )( 1 5 A )f u s e . l l a i n r e l a y1 .A l s o r e p l a c e N O - R e p l a c et h e P G M - Fm t h e N o 6 E C U{ E C I M()1 5 A )f u s e .I Wire side of femaleterminals ( 1 5 A ) f u s ei n t h e 22. I n s p e c t t h eN o . 1 7 F U E LP U I \ 4 P ls thete continuity? under-dashf use/relaybox. YES Go to step 20. ls the tuse OK? NO- Replacethe componentthat made continuity to body ground go away when disconnected.lf the item is the ECM,updatethe ECM if it does not have the latestsoftware.or substitutea known-good ECM,then recheck(seepage 11-6).lf the symptom/ indicationgoes away with a known'good ECM, r e p l a c et h e o r i g i n a E l CM. Also replacethe No. 6 ECU(ECM)(15 A) fuse, YES Go to step 34. NO Go to step 23. 23. R e m o v et h e b l o w nN o , 1 7 F UE LP U M P( 1 5 A )f u s e from the under-dashfuse/relaybox. 2 4 . DisconnectECfvlconnectorE (31P). 20. Disconnectthe connectorsof all these components. . . . . . P G M - Fm l a i n r e l a y2 E C Mc o n n e c t oA r (31P) lnjectors l d l ea i r c o n t r o l( l A C ) v a l v e CamshaftPosition{CMP)sensorB (Top dead center(TDC)sensor) . Crankshaftposition(CKP)sensor (conr'd) 11-99 PGM-FISystem MIL CircuitTroubleshooting(cont'dl 25. Checkfor continuitybetweenECMconnector terminal E9 and body ground. 27. Checkfor continuitybetweenECIVI connector terminalEgandbodyground. ECMCONNECTOR E (31P) ECMCONNECTOR E 131P) Wire side o{ {emaleterminals Wire side oI Jemaleterminals ls therc continuity? ls there continuity? YES-Go to step 26. YES Repairshort in the wire betweenthe No. 17 ,r F UE LP U M P( 1 5 A ) f u s ea n d t h e E C M( E 9 ) o betweenthe No. 17 FUELPUMP (15A) fuse and the P G M - Fm I a i n r e l a y2 . A l s o r e p l a c et h e N o . 1 7 F U E L P U M P( 1 5 A ) f u s e . l N O R e p l a cteh e N o . l T F U E L P U M P ( 1 5 A ) f u s e , and updatethe ECM if it does not have the latest software.or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM.replacethe originaE l CM.I NO Go to step 28. 28. Removethe rear seatcushion (seepage 20-80). 26. Removethe PGM-Flmain relay 2 (A). 29. Removethe accesspanelfrom the floor. 30. Disconnectthe fuel pump 5P connector. 11-100 \ 31. Checkfor continuitybetweenfuel pump5P connector terminalNo.5 andbodyground. FUELPUMP5PCONNECTOR 33. Checkfor continuitybetweenfuel pump5P connector terminalNo.5 andbodyground. FUELPUMP5P CONNECTOR = Wire side ol lemal€ rerminals Wire side of temaleterminals ls there continuity? ls therc continuity? YES Repairshortin thewire betweenthefuel p u m pa n dt h eP G M - Fml a i nr e l a y2 .A l s or e p l a c e t h EN O .1 7F U E LP U M P( 1 5 Af)U S E . T YES Replacethe PGM-Flmain relay 2. Also r e p l a c et h e N o . 1 7 F U E LP U M P( 1 5 A )f u s e . l NO Checkthe iuel pump, and replaceil if necessary.Also replacethe No. 17 FUELPUMP ( 1 5 A )f u s e . ! NO-Go to step32. 32. Reinstallthe PGM-Flmainrelay2 (A). 34. DisconnectECMconnectorE (31P). 3 5 . T u r nt h e i g n i t i o ns w i r c hO N { 1 1 1 . 36. Measurevoltage betweenECMconnectorterminal E9 and body ground. ECfl CON|{CCIORE (3rPt Wire side ol female lerminals ls there battery voltage? YES Go to step 37. NO Repairopen in the wire betweenthe No. 17 F U E LP U M P( 1 5 A ) f u s ea n d t h e E C M( E 9 ) . 1 (cont'd) 11-101 PGM-FISystem (cont'dl MIL CircuitTroubleshooting 37. lvleasure voltagebetweenECM/PCM connector t e r m i n aEl 7a n db o d yg r o u n d . 40. lvleasurevoltage betweenPGN4-Fl main relay 1 4P c o n n e c t otre r m i n a lN o . 4 a n d b o d vq r o u n d . PGM-FIMAIN RELAY1 ilP CONNECTOR ECM CONNECTORE {31PI MRLY Wire side of femaleterminals Wire side ot lemale terminals ls there battery voltage? ls there battery voltage? YES Go to step 42. Y E S - G o t o s t e p4 1 . NO Go to step38. NO Repairopen in the wire betweenthe No. 6 E C U( E C M )( 1 5 A )f u s ea n d t h e P G f M - Fml a i n r e l a y1 . I 38. Turn the ignitionswitch OFF. 3 9 . Removethe PGM-FImain relay 1 {A} -A 4 1 . Checkfor continuitybetweenPGM-FImain relay 1 4P connectorterminal No. 3 and ECMconnector t e r m i n a lE 7 . PGM.FIMAIN RELAY1 4P CONNECTOR MRLY(RED/YEL) ECMCONNECTOR E 131PI MRLY(RED/YEL) Wire side of femaleterminals ls there continuity? YES-Testthe PGM-Flmain relay 1 (seepage2251). lf the relay is OK, updatethe ECM if it does not have the latestsoftware,or substitutea knowngood ECM,then recheck{seepage 11'6).lf the symptom/indicationgoes away with a known-good E C M ,r e p l a c et h e o r i g i n a E l CM.I NO*Repair open in the wire betweenthe PGM-FI m a i n r e l a y1 a n d t h e E C M( E 7 ) . 1 11-102 \ 42. ReconnectECI\4connectorE {31P). 48. MeasurevoltagebetweenPGM-FI mainrelay1 4P connector terminalNo.2 andbodyground. 4 3 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . PGM.FIMAIN RELAY1 4PCONNECTOR 44. Measurevoltage betweenbody ground and ECM connectorterminals42 and 43 individually. ECMCONNECTOR A {31PI Wire side of temaleterminals ls there battery voltage? Wire side of femaleterminals YES Go to step 49. ls there battery voltage? N O R e p a i ro p e ni n t h e w i r e b e t w e e nt h e N o . 6 E C U{ E C M )( 1 5 A } f u s ea n d t h e P G M - Fm l ain r e l a y1. ! YES Go to step 51. NO Go to step 45. 4 9 . T u r nt h e i g n i t i o ns w i t c hO F F . 4 5 . T u r nt h e i g n i t i o ns w i t c hO F F . 46. R e m o v et h e P G M ' F m l a i n r e l a y1 {A) 5 0 . Checkfor continuitybetweenPGM-Flmain relay 1 4P connectorterminal No. 1 and ECMconnector t e r m i n a l s4 2 a n d 4 3 i n d i v i d u a l l y . ,A PGM.FI MAIN RELAYI ilP CONNECTOR IGPl (YEL/BLK) W i r es i d eo f f e m a l et e r m i n a l s 4 7 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . ls there continuity? YES Replace t h e P G M - Fm l a i n r e l a y1 . 1 NO Repairopen in the wire betweenthe PGM-FI '1 m a i n r e l a y a n d t h e E C M( A 2 ,A 3 ) . 1 {cont'd} 11-103 PGM-FISystem MIL CircuitTroubleshooting(cont'dl 51. MeasurevoltagebetweenbodygroundandECM connector terminals44, A5,423,and424 individuallv. ECMCONNECTOR A 131P) PG2(BLK) PG1IBLKI 53. Turn the ignitionswitch OFF. 54. Disconnectthe manifoldabsolutepressure(MAP) sensor3P connector. 55. T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . 56. Measurevoltage betweenbody ground and ECM c o n n e c t otre r m i n a A l 21. ECMCONNECTOR A {31P) W i r es i d eo f f e m a l et e r m i n a l s ls there morc than 1.0 V ? YES Go to step 52. N O - R e p a i r o p e ni n t h e w i r e ( s )t h a t h a d m o r et h a n 1.0V betweenG 10'l and the ECM (A4,A5, A23, A24l.a Measurevoltagebetweenbody ground and ECM c o n n e c t otre r m i n a 4 l 21. ECMCONNECTOR A 131P) Wiresideof femaleterminals ls there about 5 V? YES Replacethe MAP sensor.l NO Go to step 57. 5 7 . Turn the ignition switch OFF. 5 8 . D i s c o n n e cEt C Mc o n n e c t oA r (31P). Wiresideof femaleterminals ls there about 5 V? YES-Go to step 60. N O - G o t o s t e p5 3 . 11-104 \ 59. Checkfor continuitvbetweenECIM connector t e r m i n a4l 2 1a n db o d yg r o u n d . t t, Turn the ignition switch OFF. o z , Disconnectthe throttle position(TP)sensor3P connector. ECM CONNECTORA {3,IPI 6 3 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . 64. Measurevoltage betweenbody ground and ECM connectorterminal 420, ECMCONNECTOR A 131P) Wire side of femaleterminals ls there continuity? YES*Repair short in the wire betweenthe ECM ( 4 2 1 )a n d t h e M A P s e n s o r . l NO Updatethe ECM it it does not have the latest soflware,or substitutea known-goodECM,then recheck(seepage 1'l-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CM.I Wiresideof femaleterminals ls there about 5 V? YES Replacethe thronle body (theTP sensoris not availableseparately). I 6 0 . Measurevoltagebetweenbody ground and ECM connectorterminal 420. NO Go to step 65. ECMCONNECTOR A {3TP} 65. Turn the ignition switch oFF. 66. DisconnectECMconnectorA (31P). 1 1 2 1 43 5 o t / I 1 0 11112 5 6 / 1189 2t 21 2' 231?4 ? q Tln 29 vcc2 IYEL/ BLU) W i r es i d eo t f e m a l tee r m i n a l s ls there about 5 V? YES-Go to step 68. N O - G o t o s t e p6 1 . conlo 11-105 PGM-FISystem MIL CircuitTroubleshooting(cont'd) 6 7 . Checkfor continuitybetweenECIM connector t e r m i n aAl 2 0a n db o d yg r o u n d . 68. Measurevoltage betweenbody ground and ECM c o n n e c t otre r m i n a lE 5 . ECMCONNECTOR A (31P) r l 2 l 3 1 54 9 o t / 10 t1 121,/1,/ 1516 22 '3 241 12526 ECMCONNECTOR E (31PI ta, n 9 2A21 vcc2 o {YEL/ BLU} Wire side of femaleterminals Wire side of femaleterminals ls there continuity? Is there about 5 V? YES Repairshon in the wire betweenthe ECN4 {A20)and the TP sensor,or repairshort in the wire betweenthe ECM (A8) and the knocksensor.t YES U pdatethe ECM if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodEClvl,replacethe o r i g i n aE l CM.t NO Updatethe ECM if it does not have the latest software.or substitutea known-goodECM,then recheck(seepage l1-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CM.t NO-Go to step 69. 6 9 . Turn the ignition switchOFF. 7 0 . Disconnectthe fuel tank pressure(FTP)sensor3P connector. 1 1 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . 11-106 72. MeasurevoltagebetweenbodygroundandECM connector terminalE5. 7 6 . T u r nt h e i g n i t i o ns w i t c hO F F . 7 7 .T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . ECMCONNECTOR E 131P} 7 8 . Measurevoltage betweenECMconnectorterminal E 2 9a n d b o d y g r o u n d . ECMCONNECTOR E (31P) r l 2 l 3 1 4 5 6 1 15 6 ,/1,/114 22 23 241 l,/ 8 9 2A21 2930 scstBRN) Wire side of femaleterminals ls there about 5 V? Wiresideof femaleterminals YES Replacethe FTPsensor.t NO Go to step 73. ls there about 5 V (or battery voltage)? 1 3 . Turn the ignitionswitch OFF. YES-Go to step 82. 7 4 . DisconnectECMconnectorE (3'lP). NO Go to step 79. 7 5 .Checkfor continuitybetweenECMconnector 7 9 . Turn the ignitionswitch OFF. t e r m i n a lE 5 a n d b o d y g r o u n d . 8 0 . DisconnectECMconnectorE (31P). ECMCONNECTOR E {31PI Wire side of femaleterminals Is there continuity? YES Repairshort in the wire betweenthe ECM ( E 5 )a n dt h e F T Ps e n s o r . l NO Updatethe ECM if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CM.I (cont'd) 11-107 PGM-FISystem MIL GircuitTroubleshooting(cont'd) 81. Checkfor continuitybetweenECMconnector t e r m i n a lE 2 9a n d b o d y g r o u n d . ECMCONNECTOR E 131P} r l 2 l 34 5 14 t c 22123124 8 I 61,/118 2A21 271./ 3031 scs(BRN) o Wire side of femaleterminals ls there continuity? YES-Repair short in the wire betweenthe data link connector(DLC)and the ECM(E29).1 NO Updatethe ECM if it does not havethe latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe o r i g i n aE l CI\4,I Turn the ignition switch OFF. DisconnectECMconnectorE (31P). T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . Does the MIL stay on? YES-Repair short in the wire betweenthe gauge a s s e m b l ya n dt h e E C M( E 3 1) . l f t h e w i r e i s O K , r e p l a c et h e g a u g ea s s e m b l y . l NO Updatethe ECM if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CM.I 11-108 DLCCircuitTroubleshooting lf the ECMdoes not communicatewith the OBD ll scan tool, HondaPGfMTester,or l/M test equipment,do this troubleshootingprocedure. 1. Measurevoltage betweenDLCterminal No. 16 and body ground. 3. Measurevoltage betweenDLCterminalsNo. 5 and No. 16. DATALINKCONNECTOR {DLC) DATALINKCONNECTOR {DLCI (WHT/RED) Terminalside of femaleterminals ls there battery voltage? Terminal sideof lemaleterminals YES Go to step 4. ls therc battery voltage? NO- Repairopen in the wire betweenDLCterminal N o . 5 a n dt h e E C M( E 3 )t. YES-Go to step 2. 4 . T u r nt h e i g n i t i o ns w i t c hO N { l l ) . NO-Repair open in the wire betweenDLCterminal N o . 1 6 a n d t h e N o . 9 B A C KU P ( 7 . 5A ) f u s ei n t h e under-hoodf use/relaybox.I Measurevoltage betweenDLCterminalsNo. 4 and No.16. 5 . M e a s u r ev o l t a g eb e t w e e nD L Ct e r m i n a l sN o . 5 a n d No.7. DATA LINKCONNECTOR {DLCI DATA LINK CONNECTOR(DLCI T e r m i n asli d eo f l e m a l et e r m i n a l s Terminalsideof Jemale terminals ls there 8.5 V or more? YES Go to step 10. Is there battery voltage? NO Go to step 6. YES Go to step 3. 6. Turn the ignition switch OFF. NO Repairopen in the wire betweenDLCterminal N o . 4 a n d b o d yg r o u n d . l (cont'd) 11-109 PGM-FISystem DLCCircuitTroubleshooting {cont'dl 7. DisconnectEClvlconnectorE (31P).Make sure the O B Dl l s c a nt o o l o r H o n d aP G MT e s t e ri s disconnectedfrom the DLC. ls there continuity? YES U pdatethe ECMif it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CI\4.I 8. Checkfor continuitybetweenDLCterminal No. 7 a n d b o d yg r o u n d . DATALINKCONNECTOR IDLC) NO Repairopen in the wire betweenDLCterminal N o . 7 a n dt h e E C M{ E 2 3 )A. f t e rr e p a i r i n gt h e w i r e , checkthe DTCwith the OBD ll scantool/Honda PGl\4Tester,and go to the DTCTroubleshooting Index.l 1 0 .T u r nt h e i g n i t i o ns w i t c hO F F . 1 ' I. Ierminal side of femaleterminals DisconnectECI\4connectorE (31P).l\4akesure the O B Dl l s c a nt o o l o r H o n d aP G MT e s t e ri s disconnectedfrom the DLC. T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . ls there continuity? tJ. YES-Repair short to ground in the wire between DLCterminal No. 7 and the ECM {E23).After r e p a i r i n gt h e w i r e ,c h e c kt h e D T Cw i t h t h e O B Dl l scantool/HondaPGM Tester,and go to the DTC Troubleshootingindex.I Measurevoltage betweenDLCterminalsNo. 5 and No.7. DATALINKCONNECTOR {DLC} NO Go to step 9. 9 . Checkfor continuitybetweenDLCterminal No. 7 a n d E C Mt e r m i n a lE 2 3 , ECMCONNECTOR E {31PI Terminalside of femaleterminals K-LINE{LTBLU) DATA LINK CONNECTOR Is there 0 V? YES Updatethe ECMif it does not havethe latest then software,or substitutea known-goodECI\4, recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CM.I Terminalside of femaleterminals NO Repairshort to power in the wire betweenthe D L Ct e r m i n a lN o . 7 a n d t h e E C M( E 2 3 )A. f t e r repairingthe wire, checkthe DTCwith the OBD ll scantool/HondaPGMTester,and go to the DTC T r o u b l e s h o o t i ni g n d e x I. 11-110 t InjectorReplacement (seepage1l-144). 1 . Relieve fuel pressure 2 . Disconnect the connectors fromthe injectors(A),disconnect the groundcable(B),andremovethe bracket(C). (2.2 kgf.m, l6 lbf.ftl ffi\t\ *\ o 3. Disconnectthe quick-connectfittings (D). 4 . R e m o v e t h e f u erl a i lm o u n t i n g n u t s ( Ef)r o m t h e f u e l r a i l( F ) t h e nr e m o v e t h e f u e rl a i la n d i n j e c t o r sa s a n a s s e m b l y . 5. Removethe injectorclip (G)from the injector. 6. Removethe injectorfrom the fuel rail. (cont'd) 11-111 PGM-FISystem InjectorReplacement(cont'd) 7 . C o a t t h e n e w o - r i n g s ( A ) w i t h c l e a n e n g i n e o l l , a n d i n s e r t t h e i n j e c t o risn(tBo)t h e f u e lr a i l( C ) . \ 8 , l n s t a ltl h e i n j e c t o cr l i p { D ) . 9. Coatthe injectoro-rings(E)with cleanengine oil. 1 0 . I n s t a l l t h ei n j e c t o r si n t o t h e f u e lr a i l ,t h e n i n s t a l tl h e f u e l r a i li n t o t h e i n t a k e m a n i f o l d ( G ) . 1'1. Installthe fuel rail mounting nuts,ground cable.and bracket. 12. Connectthe connectorsto the injectors. 13. Connectthe quick-connectfittings. 1 4 . T u r n t h ei g n i t i o ns w i t c hO N ( l l ) ,b u t d o n o t o p e r a t e t h es t a r t e rA. f t e r t h e f u e lp u m p r u n sf o r a b o u t2 s e c o n d st,h e fuel pressurein the fuel line rises.Repeatthis two or three times. then checkfor fuel leakage. 11-112 A/F SensorReplacement SecondaryHO2SReplacement Special Tools Required O2 sensorwrench,Snap-onYA8875.SPTools 93750, o r e q u i v a l e n ct ,o m m e r c i a l l a yvailabre Special Tools Fequired 02 sensorwrench,Snap-onYA8875,SP Tools 93750, o r e q u i v a l e n tc,o m m e r c i a l l a Vv a i l a b l e 1. Disconnectthe A,/Fsensor4P connector(A),then removethe A,/Fsensor{B). \I ffi 1. Disconnectthe secondaryHO2S4P connector(A), then removethe secondaryH02S (B). B 44N.m InstalltheIVF sensorin the reverseorder of removal. 2 . InstallthesecondaryHO2Sin the reverseorder of removal. 11-113 PGM-FlSystem ECTSensorReplacement '1. CMPSensorB (TDCSensorl Replacement R e m o v et h e a i r c l e a n e r{ s e ep a g e1 1 - 1 6 2 ) . 2. Disconnectthe ECTsensor2P connector. ' t . R e m o v et h e a i r c l e a n e r( s e ep a g e1 1 - 1 6 2 ) . 3. Removethe ECTsensor(A). 2. Disconnectthe CN4PsensorB (TDCsensor)3P conneclor. Removethe CMP sensorB (TDCsensor)(A). {1.2kgt m.8.7 lbt.ft} l n s t a l l t h es e n s o ri n t h e reverse order of removal with a new o-ring {B). 11-114 ---r, ".- ,',',.,*nr... 8.7tbf.ftl 4 . lnstallthe sensorin the reverseorder of removal with a new o-ring {B). IAT SensorReplacement 1, Dlsconnectthe IAT sensor2P connector. KnockSensorReplacement 1. Removethe intakemanifold bracket(A). 2. Removethe clip (A) and the IAT sensor(B). 3. lnstallthe sensorin the reverseorder of removal. 24Nm (2.4kgt.m,17lbt.ftl 2. Disconnectthe knocksensor 1Pconnector. 3 . R e m o v et h e k n o c ks e n s o r( B ) . 4 . Installthesensorin the reverseorder of removal. 11-115 PGM-FISystem GKPSensorReplacement 1. Disconnect the CKPsensor3Pconnector. 2. RemovetheCKPsensor{A). 12 N.m (1.2kgt m. 8.7 tbf.ftl 3. lnstallthe sensorin the reverseorder of removal with a new o-ring (B). 11-116 VTEC/VTC ComponentLocationIndex -gl :1 i- ia r-: @'-;' --tl ;'l--i - lt i..,, €) ',.. . VTCOILCONTROL VALVE SOLENOID page11-118 Troubleshooting, 11-'l27 Test,page -' tt '--'- / CAMSHAFTPOSITION ICMPISENSORA Troubleshooting,page 11-121 Replacement, Pagel'!-128 VALVE VTCSOLENOID page11-123 Troubleshooting, page11-128 Removal/lnspection, 11-117 VTEC/VTC DTGTroubleshooting DTCP0010:WC Oil ControlSolenoidValve Malfunction 8. MeasureresistancebetweenVTCoil control s o l e n o i dv a l v e2 Pt e r m i n a l sN o . 1 a n d N o . 2 . 1 . R e s e t t h eE C M( s e ep a g e1 1 - 4 ) . VTC OIL CONTAOLSOLENOID VAI"VE2P CONNECTOB 2. Start the engine.Hold the engineat 3,000rpm with no load (in neutral)until the radiatorfan comes on, t h e nl e t i t i d l e . 3. Test-driveat a steadyspeed between20-40mph (30-60km/h)for 10 minutes. ls DTC P0010indicated? T e r m i n a s i d 6 o t m a t e t e r m i n as YES Go to step 4. ls there 6.75 8.25 Q ? NO- Intermittentfailure,system is OK at this time. Checkfor poor connectionsor looseterminalsat the VTC oil control solenoidvalve and at the ECM.I YES-Go to step L 4. Turn the ignition switch OFF. 5. Disconnectthe ECMconnectorB {24P). 6. MeasureresistancebetweenECrUconnector t e r m i n a l sB 1 a n d 8 2 3 . NO-Replace the VTC oil control solenoidvalve (seepage 11-1271.a 9 . C o n n e cV t T Co i l c o n t r o ls o l e n o i d v a l v e 2 P connectorterminalsNo. 1 and No. 2 to body g r o u n dw i t h a j u m p e r w i r ei n d i v i d u a l l y . wc otl coNTBoL sotENoto VALVE 2P CONNECTOR -4t 1 t ECMCONNECTOR B I24P) wc I 2 l lwc* tBr-K/wHT) | liELU/WHT) JUMPER WTREI IJUMPEnW|RE W i r e s i d eo f 1 6 m a l et e . m i n a t s 10. Checkfor continuitybetweenECMconnector t e r m i n a l sB 1 a n d 8 2 3 a n d b o d y g r o u n di n d i v i d u a l l y . Wiresideof femaleterminals ls there 6.75 8.25 Q ? YES Go to step 11. NO Go to step7. 7. Disconnectthe VTC oil control solenoidvalve2P connector. ls there continuity? Y E S G o t o s t e p1 1 . NO- Repairopen in the wire betweenthe ECM (B1, B23)and the VTCoil control solenoidvalve.I 11-118 \ 11. Checkfor continuitybetweenECMconnector t e r m i n a l sB 1 a n d B 2 3a n d b o d y g r o u n di n d i v i d u a l l y . DTCP0011:VTCSystemMalfunction 1. Resetthe EClvl(seepage 11-4). 2 . S t a r tt h e e n g i n e .H o l dt h e e n g i n ea t 3 , 0 0 0r p m w i t h n o l o a d ( i n n e u t r a l u) n t i lt h e r a d i a t o fra n c o m e so n . VTC (BtK/WHT) 3. Test-driveat a steadyspeed between20 40 mph (30 60 km/h)for 10 minutes. 4 . Checkfor TemporaryDTCP0011with the scantool ls Tempotaty DTC P0011indicated? ls there continuity? YES-Go to step 5. YES Go to step 12. NO- Intermittentfailure, system is OK at this time. Checkfor poor connectionsor loosewires at the V T Co i l c o n t r o ls o l e n o i dv a l v ea n d a t t h e E C M . I NO Updatethe ECM if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe original EClvl.! Watch the low oil pressurelight with the engine r un n i n g . ls the low oil pressute light on? 12. Disconnectthe VTC oil control solenoidvalve 2P connector. YES- Checkthe oil pressure(seepage 8-4).I 1 3 .Checkfor continuitybetweenECMconnector N O - G o t o s t e p6 . t e r m i n a l sB 1 a n d 8 2 3 a n d b o d y g r o u n di n d i v i d u a l l y . 6 . Turn the ignition switch OFF. 7 . Removethe auto-tensioner(seepage 4-28). vfc (8LK/WHT) W i r e s i d eo f f e m a l er e r m i n as ls there continuity? Y E S - R e p a i rs h o r ti n t h e w i r e b e t w e e nt h e E C M( B 1 , B23)and the VTCoil control solenoidvalve.l NO Replacethe VTC oil control solenoidvalve (seepage 11-1211.a (cont'd) 11-119 VTEC/VTC DTCTroubleshooting(cont'dl Removethe VTC strainer(A).Checkthe WC s t r a i n e fro r c l o g g i n g . 13. ConnectECM connectorterminalsA3 and 81 witha j u m p e rw i r e m o m e n t a r i l y . NOTE:Do not jump for more than 1 minute, ECM CONNECTORS ls the strainet OK? Wire side of femaleterminals YES Go to step g. NO-Clean the VTC strainer,then replacethe e n g i n eo i l f i l t e ra n d t h e e n g i n eo i l . l 9. Checkthe VTCoil control solenoidvalve{seepage 11-127 ). ls the VTC oilcontrol solenoid valve OK? YES Go to step 10. NO Cleanthe ports of the WC oil control solenoid valve,or replacethe VTCoil control solenoidvalve {seepage 11-127).a 1 0 .InstalltheVTCoil control solenoidvalve. 1 1 .Startthe engine.Hold the engine at 700 1,000rpm. 1 2 . C o n n e cE t C Mc o n n e c t otre r m i n a lB 2 3 t o b o d v g r o u n dw i t h a j u m p e rw i r e . ECMCONNECTOR B {24PI 213415 8 1 e l1a,/1,/ 6 7 15 181./l l./ 21 23 vTc JUMPER (BLK/WHT} WIRE Wire side of temaleterminals 11-120 Did the engine stall or run rough? YES Test-driveat a steadyspeedbetween 20 40 mph (30 60 km/h)for 10 minutes. lf temporaryDTCP00'l1 is indicated,updatethe ECIVIif it does not have the latestsoftware,or substitutea known-goodECM,then recheck(see page 11-6).lf the symptom/indicationgoes away with a known-goodECM,replacethe original E C M !. NO Go to step 14. 1 4 . Checkthe VTC actuator(seepage6,8). ls the VTC actuatot OK? YES Removethe auto-tensioner(see page 4-281, and clean or replacethe VTC oil strainer.Update the ECI\4if it does not have the latestsoftware,or substitutea known-goodECM,then recheck(see page 11-6).lf the symptom/indicationgoes away with a known-goodECM,replacethe original ECM. T NO Replacethe VTC actuator.t \ DTCP0340: CMPSensorA No Signal DTGP0344:CMPSensorA Intermittent Interruption 7. MeasurevoltagebetweenCMPsensorA 3P terminalNo. 1 andbodyground. connector CMP SENSORA 3P CONNECTOR '11-4). 1 . R e s e t h e E C M( s e ep a g e 2. Startthe engine. ls DTC P0340and/or P0344indicated? YES-Go to step 3. W i r e s i d eo l f e m a l e t e r m i n as NO Intermittentfailure,system is OK at this time. Checkfor poor connectionsor looseterminalsat t h e C M Ps e n s o rA a n d a t t h e E C M . I ls thercabout5 V? YES-Go to step8. 3. Turn the ignition switch OFF. NO-Go to step10. 4. Disconnectthe CMPsensorA 3P connector. 5 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . 6. Measurevoltage betweenCMPsensorA 3P connectorterminal No. 3 and body ground. CMPSENSORA 3P CONNECTOR tG1 1 2 3 voltagebetweenCMPsensorA 3P 8. Measure s o .2 a n dN o .3 . c o n n e c t ot er r m i n a lN CMP SENSORA 3P CONNECTOF ;f-;-1 J ,o,,r.*,"r., I l1 l-t ,-or---T--I {8RN/YEL) ni- (BLK/YEL} ls there battety voltage? YES Go to step 9. Wiresideof femaleterminals NO-Repair open in the wire betweenthe Cl\4P s e n s oA r a n dG 1 0 1 . 1 ls there battety voltage? YES Go to step 7. N O C h e c kt h e N o . 4 A C G { 1 0 A )f u s ei n t h e u n d e r dash fuse/relaybox. lf the fuse is OK, repairopen in the wire betweenthe CN4PsensorA and No. 4 ACG ( 1 0 A )f u s e . I 9. Substitutea known-goodCMPsensorA and recheck. ls DTC P0340and/ot P0344indicated? YES Updatethe ECM if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe o r i g i n aE l CM.I t h e o r i g i n aC l M Ps e n s o rA { s e ep a g e NO Replace 11-128).t (cont'd) 11-121 VTEC/VTC DTCTroubleshooting(cont'd) 1 0 .Measurevoltage betweenECMconnectorterminal A25 and body ground. ECMCONNECTORA 131P) DTCP0341:WC PhaseGap 1 . R e s e t t h eE C M{ s e ep a g e1 1 - 4 ) . 2. Startthe engine. ls DTC P0341indicated? YES Go to step 3. NO Intermittentfailure,system is OK at this time. Checkfor poor connectionsor looseterminalsat t h e C M Ps e n s o rA a n d a t t h e E C M . I Wiresideof femalete.minals 3. Checkthe VTC oil control solenoidvalve (seepage 11_127]-. ls there about 5 V? YES-Repair open in the wire betweenthe ECM ( A 2 5 )a n d C M Ps e n s o rA . I N O - G o t o s t e p1 1 . Isthe VTC oil control solenoid valve OK? YES-Go to step 4. NO-CIean the VTCoil control solenoidvalve,or r e p l a c ei t ( s e ep a g e1 1 - ' l 2 7 l . a 1 1 .Turn the ignition switch OFF. 't2. DisconnectECMconnectorA (31P) Checkfor continuitybetweenECMconnecror terminal A25 and body ground. ECMCONNECTONA 131P} 4. Removethe head cover,and checkthe cam chain {seepage 6-12). ls the cam chain OK? YES Go to slep 5. NO Replace t h e c a m c h a i n( s e ep a g e6 - 1 2 ) . 1 5. Checkthe VTC actuator(seepage 6-8). ls the VTC actuator OK? Wiresideof femaleterminals ls tnere continuity? YES-Repair short in the wire betweenthe ECM (A25)and the CMP sensorA. t NO Updatethe ECt\4if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CM.I 11-122 YES- U pdatethe ECM if it does not have the tatest soflware,or substitutea known-goodECI\4, then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CM.I NO- Replacethe VTC actuator.l DTCPl259:WEC SystemMalfunction SpecialToolsRequired . Pressuregaugeadapter07NAJ P07010A . A/T low pressuregaugew/panel 07406-0070300 . A/T pressurehose 07406-0020201 . Av/Tpressurehose,2,210mm 07IMAJ-PY4o11A . l"/T pressureadapter07MAJ-PY40120 . Oil pressurehose 07ZAJ-S54,4200 6. Disconnectthe VTECoil pressureswitch2P connector. 7. Checkfor continuitybetweenVTECoil pressure switch 2P connectorterminals No. 1 and No. 2 SWITCH VTECOILPRESSURE 2PCONNECTOR 1 . R e s e t h e E C M( s e ep a g e1 1 - 4 ) . 2 . C h e c kt h e e n g i n eo i l l e v e l ,a n d r e f i l li f n e c e s s a r y . 3. Startthe engine.Hold the engineat 3,000rpm with no load {in neutral)until the radiatorfan comes on. 4. Roadtestthe vehicle: Acceleratein the 1stgear to an engine speedover 4.000rpm. Holdthe speedfor at least2 seconds.lf DTCP1259is not repeatedduring the first road test, repeatthe test two more times. ls DTC P1259 indicated? YES Go to step 5. NO-lntermittent failure,system is OK at this time Checkthe oil consumptionif oil was added in step 2. Checkfor poor connectionsor looseterminalsat the VTECsolenoidvalve,the VTECoil pressure I switch,and at the ECI\4. 5, Turn the ignitjon switch OFF. T e r m i n asl i d eo f m a l et e r m i n a l s Is therecontinuity? YES-Go to step8. switch.l theVTECoil pressure NO Replace s w i t c hO N( l l ) . 8 . T u r nt h ei g n i t i o n switch voltagebetweenVTECoil pressure 9. Measure terminalNo.1 andbodyground 2Pconnector SWITCH VTECOILPRESSURE 2PCONNECTOR VTPSW /T\ {BLU/BLK} {.--rr-l'--.l \rJ II oI W i r es i d eo f f e m a l et e r m i n a l s ls there battety voltage? Y E S G o t o s t e P1 4 . NO-Go to step 10. (cont'd) 11-123 VTEC/VTC DTCTroubleshooting(cont'd) 10. Measurevoltage betweenECMconnectorterminal 89 and body ground. 14. fMeasure voltagebetweenVTECoil pressure switch 2 Pc o n n e c t ot er r m i n a lN s o .1 a n dN o .2 , ECMCONNECTOR B (24P) VTECOILPRESSURE SWITCH 2P CONNECTOR VTPSW (BLU/BLK) 213415 o 1 8 I a t / t / n 3 15 (BRN/YELI WPSW {BLU/BLK} WiresideofIemale terminals Wire side of Iemaleterminals ls there battery voltage? ls there battery voltage? YES Repairopen in the wire betweenthe VTECoil pressureswitch and the ECM(89).t Y E S - G o t o s t e p1 5 . N O - G o t o s t e p1 1 . NO Repairopen in the wire betweenthe VTECoil p r e s s u r es w i t c ha n d G 1 0 1 . 1 1 1 .Turn the ignition switch OFF. Turn the ignition switch OFF. DisconnectECMconnectorB {24P). to. Checkfor continuitybetweenECMconnector t e r m i n a lB g a n d b o d y g r o u n d . ECMCONNECTOR B {24P) 2 3 415 I 9 ol./ ./ 13 6 7 15 Disconnectthe VTECsolenoidvalve 2P connector. 1 7 . Checkfor resistancebetweenVTECsolenoidvalve 2 Pc o n n e c t otre r m i n a l sN o , 1 a n d N o . 2 . VTECSOLENOIDVALVE 2PCONNECTOR VTPSW{BLU/BLK} Wrre side of femaleterminals T e r m i n as li d eo f m a l et e r m i n a l s ls there continuity? YES Repairshort in the wire betweenthe VTECoil pressureswitch and the ECM (89).I ls there 14- 30 Sl ? YES Go to step 18. NO Updatethe ECM if it does not have the latest software.or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l C N 4! . 11-124 NO Replacethe VTECsolenoidvalve (seepage 11-128).t 1 8 . Removethe VTECoil pressureswitch (A) and i n s t a l l t h es p e c i a l t o o l a s s s h o w n ,t h e n r e i n s t a ltlh e VTECoil pressureswitch. 07406-0070300 07406-0020201 ot 07MAJ-PY,lo11A and 07MAJ-PY40120 \lsl 24. Disconnectthe VTECsolenoidvalve 2P connector. 25. Aftachthe batterypositiveterminalto VTEC s o l e n o i dv a l v e2 P c o n n e c t otre r m i n a lN o . 2 . 26. Startthe engine,then connectthe batterynegative t:={ R 23. Turn the ignitionswitch OFF. A 22 N.m l2.2kgt.m, 16rbf.ft) 07NAJ-P07010A t e r m i n a l t oV T E Cs o l e n o i dv a l v e2 P c o n n e c t o r t e r m i n a lN o . 1 , a n d c h e c kt h e o i l p r e s s u r ea t a n engine speedof 3,000rpm. ls the oil pressure above 390 kPa (4.0 kgt/crtf , 57 psi)? YES Go to step 27. NO InspecttheVTECsolenoidvalve (seepage I112Al.a 1 9 .Reconnectthe VTECsolenoidvalve 2P connector and VTECoil pressureswitch 2P connector. 20. Connecta tachometeror OBD ll scantool/Honda PGM Testerto the DLC. 2 1 . Startthe engine.Holdthe engine at 3,000rpm with 27. With the batteryterminalsstill connectedtothe VTECsolenoidvalve connector,measurevoltage betweenECMconnectorterminal 89 and bodv oround. B {24P) ECMCONNECTOR no load (in neutral)until the radiatorfan comes on. 22. Checktheoil pressureat enginespeedsof 1,000 and 2.000rpm. Keepthe measuringtime as shon a s p o s s i b l e{ l e s st h a n 1 m i n u t e )b e c a u s et h e e n g i n e i s r u n n i n gw i t h n o l o a d . ls the oil ptessure below 49 kPa (0.5 kgf/cnf, 7 psi)? YES Go to step 23. NO Inspectthe VTECsolenoidvalve (seepage 11't28l.a Wire side of femaleterminals ls there battery voltageabove 4,000 tpm? YES Go to step 28. NO-Replace the VTECoil pressureswitch (see p a g e1 1 ' 1 2 8 ) . 1 28. Turn the ignitionswitch OFF. 29. Disconnectthe batteryterminalsfrom the VTEC solenoidvalve terminal connector. (cont'd) 11-125 WEC/VTC DTCTroubleshooting(cont'd) 30. DisconnectECMconnector B (24P) Checkfor continuitybetweenECMconnector t e r m i n a l8 1 5 a n d b o d y g r o u n d . ECM CONNECTORB {24P) 32. ConnectVTECsolenoidvalve 2P connector terminal No. 2 to body ground with a jumper wire. VTEC SOLENOIDVALVL 2P CONNECTOR r-.'-r.---.1 t 1 t 2 l + JUMPERI VtS WIRE I IGRN/YEL) I Wiresideof femaleterminals Wire side of femaleterminals Checkfor continuitybetweenECMconnector t e r m i n a l8 1 5 a n d b o d y g r o u n d . ls therecontinuity? ECM CONNECTORB {24PI YES-Repairshortin thewire betweentheVTEC s o l e n o ivda l v ea n dt h eE C M( 8 1 5 ) . 1 NO Goto step32. Wiresideof femaleterminals ls thete continuity? YES Updatethe ECM if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CM.I NO Repairopen in the wire betweenthe VTEC s o l e n o i dv a l v ea n dt h e E C M( 8 1 5 ) . I 11-126 WC OilControlSolenoidValveRemoval/Test 1 . R e m o v et h e W C o i l c o n t r o ls o l e n o i dv a l v e( A ) . NOTE:lnstallthe valve in the reverseorder of removalwith a new o-ring (B),then checkthese tlems: Connectthe batterypositiveterminal to VTC oil control solenoidvalve 2P connectorterminal No. 2. VTCOILCONTROLSOLENOID VALVE2PCONNECTOR Cleanand dry the VTCoil control solenoidvalve mating surface. Coatthe O-ringwith engineoil. Do not installthe VTC oilcontrol solenoidvalve while wearingfibrous gloves, Be carefulnot to contaminatethe cylinder head openrng. Terminalside oJ m a l et e r m i n a l s BATTERY Connectthe batterynegativeterminalto VTC oil c o n t r o ls o l e n o i dv a l v e2 Pc o n n e c t otre r m i n a lN o . 1 , t h e n m a k es u r et h e v a l v e( A )o p e n sf u l l y . Checkthe VTC oil control solenoidvalve filter for clogging.lf it is clogged,replacethe VTC oil control solenoidvalve. Checkthe clearancebetweenthe port (advance side)and the valve.The clearance(A) should be at l e a s t2 . 8m m ( 1 / 8i n . ) . 11-127 VTEC/WC CMPSensorA Replacement WEC SolenoidValveRemoval/ Inspection 1 . R e m o v et h e a i r c l e a n e r( s e ep a g e11 - 1 6 2 ) . Disconnectthe CMP sensorA 3P connector. 1 . Disconnectthe VTECsolenoidvalve 2P connector. Removethe CMPsensorA (A). MeasureresistancebetweenVTECsolenoidvalve c o n n e c t otre r m i n a l sN o . 1 a n d N o . 2 . Resistance:14-30 Q B-'-----'-l:,",14* Installthe sensorin the reverseorder of removal with a new o-ring (B). 3. lf the resistanceis within specifications,removethe VTECsolenoidvalve assemblv(A)from the cylinder head,and checkthe VTECsolenoidvalve f i l t e r( B ) f o rc l o g g i n g l.f i t i s c l o g g e d r, e p l a c et h e solenoidvalve filter,the engine oilfilter, and the e n g i n eo i l . 6x1.0mm 9.8 N.m (1.0kgf.m, 7,2 lbf.ftl 11-128 L ldleGontrolSystem ComponentLocationIndex TE' IDLEAIRCONTROL{IAC)VALVE page11-'131 Troubleshooting, 11-129 ldle ControlSystem ( DTCTroubleshooting DTCP0505:ldle ControlSystemMalfunction 7 . P u ty o u r f i n g e r so n t h e l o w e rp o n ( A )i n t h e t h r o t t l e oooy. NOTE:lf DTCP1519is storedatthe same time as DTC P0505,troubleshootDTCP1519first, then recheckfor DTCP0505. 1. Startthe engine.Hold the engineat 3,000rpm with no load (in neutral)until the radiatorfan comes on, then let it idle, 2. Checktheengine speedat idle with no,load conditions:headlights,blower fan, rear defogger, radiatorfan, and air conditioneroff. Is the engine running at 750t50 rpm? YES- Intermittentfailure,system is OK at this trme.I Does the enginestall? NO lf the idle speed is lessthan 700 rpm, go to step 3; if it's 800 rpm or higher,go to step 4. Y E S C h e c k t h ei d l es p e e d( s e ep a g e1 1 - 1 3 8 )l f. i t ' s out of specification,replacethe IACvalve.l 3 . D i s c o n n e ct h t e i d l e a i r c o n t r o l{ l A C )v a l v e 3 P connector. Does the engine speed increase or fluctuate? YES- Checkthe idle speed{seepage 1 1-138).lf the idle will not adjust properly,cleanthe passagein the throttle body, and then adjustthe idle.I NO- Replace t h e I A Cv a l v e . I 4. Turn the ignition switch OFF. 5. Removethe intakeair duct from the throttle body. 6. Startthe engine,and let it idle. 11-130 NO With the throttlevalve completelyclosed, c h e c kf o r v a c u u ml e a k sa, n d r e p a i ra s n e c e s s a r y . l DTCPl519:IACValveCircuitMalfunction 1 . R e s e t t h eE C M( s e ep a g e1 1 - 4 ) . 8, Checkfor continuitybetweenbody ground and IAC v a l v e3 Pc o n n e c t otre r m i n a lN o . 1 . IACVALVE3PCONNECTOR 2. Turn the ignition switch ON (ll) ls DTC P 1519indicated? 2 1 YES Go to step 3. 3 PG1{BLK} NO-lntermittent failure,system is OK at this time. Checkfor poor connectionsor looseterminalsat the IACvalve and at the ECM.I 3. Turn the ignition switch OFF. a. Wire side of lemaleterminals 4. Disconnectthe IACvalve 3P connector. Is there continuity? 5. Turn the ignitionswitch ON (ll). Y E S - G o t o s t e p9 . 6. Measurevoltage betlveenIACvalve 3P connector terminal No. 2 and body ground. IACVALVE3PCONNECTOR NO Repairopen in the wire betweenthe IACvalve a n dG ' 1 0 1 . 1 9 . DisconnectECMconnectorA (31P) 1 2 3 IGP{YEL/BLK) 1 0 . Checkfor continuitybetweenbody ground and l 12. E C Mc o n n e c t otre r m i n a A ECM CONNECTORA 131P) s r l 2 l 3 l 45 6 1 7 / 115 6 ./118192C21 da 25126 l27ln2930 r0 1l 12./ Wire side of femaleterminals ls therebattery voltage? IACV{BLK/RED} 1,) YES Goto step7. NO-Repairopenin thewire betweenthe IACvalve a n dt h eP G M - Fml a i nr e l a y1 . 1 terminals WiresideoJJemale ls there continuity? 7 . Turnthe ignitionswitchOFF. YES-Repair short in the wire betweenthe IAC v a l v ea n dt h e E C M( A 1 2 ) . 1 N O G o t o s t e p 11 . LCOnIOl 11-131 ldle ControlSystem ( DTCTroubleshooting(cont'd) 11. ConnectIACvalve3Pconnector terminalNo.3to bodygroundwith a jumperwire. 15. Measurevoltagebetweenbody ground and ECM c o n n e c t otre r m i n a A l 12. IACVALVE3PCONN€CTOR ECMCONNECTOR A 131P} r l 2 l 3 1 54 6 1 7 IACVIBLK/REO} JUMPERWIRE t 0 1tl12l,/l/ 22 tc 231?4l| 12. 9 6 ,/ 118 2C21 zil28 30 IACVIBLK/RED) Wire side of femaleterminals Wire side ol femaleterminals Checkfor continuitybetweenECMconnector t e r m i n a l A l 2 a n d b o d yg r o u n d . ECMCONNECTOR A 131P) I s there battery voltage? YES-Update the ECI\4if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe o r i g i n aE l CI\4.1 N O - R e p l a c et h e I A Cv a l v e . I Wire side of femaleterminals ls therecontinuity? YES Goto step13. NO-Repairopenin thewire betweenthe IACvalve a n dr h eE c M( A 1 2 ) . r 1 3 .Reconnect the IACvalve3Pconnector. 1 4 .Turnthe ignitionswitchON (ll). 11-132 ! A/G SignalCircuitTroubleshooting 1 . Turn the ignitionswitch ON (ll). 2 . MomentarilyconnectECMconnectorterminals424 and E18with a jumper wire severaltimes. 6. Momentarilyconnectunder-hoodtuse/relaybox 14Pconnectorterminal No. 10 to body ground with a jumper wire severaltimes. UNDER.HOOD FUSE/RELAY BOX I4P CONNECTOR 1 2 3 1 8 9 10 11 5 6 I J 14 ACC (RED) JUMPERWIRE Wiresideof femaleterminals Wire side of femaleterminals ls there a clicking noise I rom the NC compressor clutch? ls there a clicking noise f rom the NC compressor clutch? YES Go to step 3. YES- Repairopen in the wire betweenthe ECM (E'18)and the Ay'Cclutch relay.l NO-Go to step 6. NO- Checkthe A/C systemfor other symptoms.l Start the engine. Turn the blower switch ON. 5. Turn the Ay'Cswitch ON. Does the NC operate? Y E S - T h e a i r c o n d i t i o n i n sg i g n a li s O K . I NO Updatethe ECM if it does not have the latest software,or substitutea known-goodECM.then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe o r i g i n a€ l CM.l 11-133 ldle GontrolSystem AlternatorFRSignalCircuitTroubleshooting ' t . Disconnectthe alternator4P connectorfrom the alternalor. 2. T u r nt h e i g n i t i o ns w i t c hO N { l l ) . '11. Connectalternator4P connector term inal No.4 to body ground with a jumper wire. ALTERNATOR4P CONNECTOR 3 . Measurevoltage betweenECMconnector t e r m i n a l s4 2 4 a n d 8 1 3 . ECM CONNECTORS A l31Pl 1 2 3 4 ALTFIWHT/RED) 1 2 1 3 4 5 6 1 1| 1 . , 'I 10 1 1 1 1 2 , / 5 6 , / r8119l2C21 23124 28129130 L JUMPERWIRE (BRN/Y EL) ALTF (WHT/REDI 213 4t5 8 9ltal,/l/ 6 1 15 Wiresideof femaleterminals 1 2 .Checkfor continuitybetweenbody ground and EClvlconnectorterminal 813. Wire side of femaleterminals ECMCONNECTOB B (24PI ls there about 5 V? YES Go to step 4. \ N O - G o t o s t e p1 3 . 4. Turn the ignition switch OFF. 5. Reconnectthe alternator4P connector. 6. Slan the engine.Hold the engineat 3,000rpm with no load (in neutral)until the radiatorfan comes on, then let it idle. 7. lvleasurevoltagebetweenECMconnector t e r m i n a l sA 2 4 a n d B 1 3 . Does the voltage decrease when the headlights and rear window defogger arc tutned on? Wire side of femaleterminals ls there continuity? YES-Testthe alternator(seepage 4-22).1 NO Repairopen in the wire betweenthe ECM ( B1 3 )a n dt h e a l t e r n a t o r . l 1 3 .Turn the ignitionswitch OFF. Y E S T h e a l t e r n a t oFr Rs i g n a li s O K . l N O - G o t o s t e p8 . 8. Turn the ignition switch OFF. 9. DisconnectECMconnectorB (24P). 10. Disconnectthe alternator4P connector. 11-134 't4. DisconnectECMconnectorB (24P). ElectricalPowerSteering(EPSI SignalCircuitTroubleshooting 15. Checkfor continuitybetweenbody ground and ECIMconnectorterminal 813. ECM CONNECTORB I24P} 1 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . 2 . l\4easure voltage betweenECMconnector t e r m i n a l s4 2 4 a n d E 1 6 . Wire side of femaleterminals ls there continuity? Wire side of femaleterminals YES Repairshort in the wire betweenthe ECM ( 8 1 3 )a n dt h e a l t e r n a t o r . l NO Updatethe ECM if it does not have the latest software,or substitutea known-goodECM,then rechecklsee page 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe o r i g i n aE l CM.I ls there battery voltage? YES Go to step 6. NO Go to step 3. 3 . Startthe engine. 4 . Turn the steeringwheel lo the full lock position. 5 . l\4easurevoltage betweenECMconnector t e r m i n a l sA 2 4 a n d E 1 6 . ls there momentatybattery voltage? Y E S T h e E P Ss i g n a li s O K . t N O G o t o s t e p1 0 . 6 . T u r nt h e i g n i t i o ns w i t c hO F F . 7. Disconnectthe EPScontrol unit 20Pconnector. 8 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . (cont'd) 11-135 ldle ControlSystem ElectricalPowerSteering(EPSISignalCircuitTroubleshooting(cont'd) 9. Measure voltagebetweenEPScontrolunitterminal N o . l 7a n db o d yg r o u n d . '13. l\4easure voltagebetweenEPScontrol unitterminal N o . 1 7a n d t h e b o d y g r o u n d . EPSCONTROLUNIT2OPCONNECTOR EPSCONTROLUNIT2OPCONNECTOR Wire side of femaleterminals Wire side of femaleterminals ls there battery voltage? ls there battety voltage? YES Substitutea known-goodEPScontrol unit andrecheck.l YES-Substitute a known-goodEPScontrol unit a n dr e c h e c k . I NO- Repairopen in the wire betweenthe ECM ( E1 6 )a n d t h e E P Sc o n t r o lu n i t . l N O - G o t o s t e p1 4 , 1 4 . Turn the ignition switch OFF. t5_ 1 0 .Turn the ignitionswitch OFF. I ' I. Disconnectthe EPScontrol unit 20Pconnector. D i s c o n n e c t t hE e C Mc o n n e c t oE r {31P). 1 6 .Checkfor continuitybetweenbody ground and E C I \ c4o n n e c t otre r m i n a E l 16. ECMCONNECTOR E {31PI 12. Turn the ignitionswitch ON (ll). 1 2 3 4 5 6 1 7 l1 89 5 6 . / 1 8 2A21 22 23 zi ./ 2930 o l EPSLD {LTGRN/BLK) a, Wiresideot Iemaleterminals lsthere continuity? YES Repairshort in the wire betweenthe ECN4 ( E1 6 )a n d t h e E P Sc o n t r o lu n i t . l NO Updatethe ECM if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CM.I 11-136 BrakePedalPositionSwitch SignalCircuitTroubleshooting 1. Checkthe brakelights. Are the brake lights on without pressing the brake pedal? YES Inspectthebrakepedal positionswitch ( s e ep a g e1 9 - 6 ) . I NO Go to step 2. 2. Pressthe brakepedal. Do the brake lights come on? 4 . I n s p e ctth e N o . 7 H O R N S , T O P( 1 5 A )f u s el n t h e under-hoodfuse/relaybox. ls the tuse OK? YES- Repairopen in the wire betweenthe brake pedal positionswitch and the No.7 HORN,STOP ( l5A) fuse, Inspectthe brakepedal positionswitch ( s e ep a g e1 9 - 1 0 ) . 1 NO Repairshort in the wire betweenthe ECM ( E 2 2 )a n dt h e N o . 7 H O R N ,S T O P( 1 5 A ) f u s e . Replace the No.7 HORNS , T O P( 1 5 A ) f u s e . t YES-Go to step 3. NO Go to step 4. 3. MeasurevoltagebetweenECMconnector terminalsA24 and E22with the brakepedal presseo. Wire side of lemaleterminals ls there battery voltage? YES-The brakepedal positionswitch signal is oK,I NO Repairopen in the wire betweenthe Eclvl (E22)and the brakepedal positionswitch.l 11-137 ldle ControlSystem ldle Speedlnspection NOTE: ' Leavethe idle air control (lAC)valve connecled. . Beforecheckingthe idle speed,checkthese items: - T h em a l f u n c t i o n i n d i c a t o lra m p ( M l L )h a s n o t b e e n reportedon. - l g n i t i o nt i m i n g - S p a r kp l u g s - Aircleaner - PCVsystem . P u l l t h ep a r k i n gb r a k el e v e ru p . S t a r tt h e e n g i n e a , nd make sure the headlightsare off. 1. Disconnectthe evaporativeemission(EVAP) canisterpurge valve 2P connector. 3 . Startthe engine.Holdthe engineat 3,000rpm with n o l o a d ( i n n e u t r a l u) n t i lt h e r a d i a t ofra n c o m e so n , t h e nl e t i t i d l e . 4 . Checkthe idle speedwith no-loadconditions; headlights,blower fan, radiatorfan, and air conditioneroff. ldle speedshould be: 750 t 50 rpm 5 . Let the engine idle for 1 minute with the heaterfan switch on Hl and air conditioneron, then checkthe i d l es p e e d . ldle speedshould be: 750 t 50 rpm 2. Connecta tachometer(A)to the test tachometer connector(B),or connectthe HondaPGM Tester(C) or an OBD ll scantool to the data link connector (DLC)(D) locatedunder the driver'sside of the dashboard. 11-138 NOTE:lf the idle speed is not wilhin specification, go to the Symptom TroubleshootingIndex, 6 . Reconnectthe EVAPcanisterpurgevalve 2P connector. ECMldle LearnProcedure The idle learn proceduremust be done so the ECMcan learnthe engine idle characteristics. Do the idle learn procedurewheneveryou do any of these actions: . Disconnectthe battery. Replacethe ECMor disconnectits connector. Resetthe ECM. NOTE:ErasingDTCSwith the HondaPGM Tester does not requireyou to do the idle learn procedure. Removethe No.6 ECU{ECM)( 15A)fuse from the under-hoodfuse/relaybox. Removethe No.19baftery(80A)fuse from the underhood fuse/relaybox. R e m o v eP G M - Fm I a i n r e l a y1 . Removeany of the wires from the under-hoodfuse/ retayDox. Disconnectany of the connectorsfrom the under hood fuse/relaybox. Disconnectthe connectorbetweenthe engine compartmentwire harnessand ECMwire harness. Disconnectthe G2 terminal from the transmission h ous r n g . DisconnecttheG'l terminal from the body. D i s c o n n e c t t hG e 1 0 1t e r m i n a fl r o m t h e c y l i n d e rh e a d cover. Procedure: To completethe idle learn procedure,do this: 1. Make sure all electricalitems (Ay'C, audio, rear defogger,l:ghts,etc.,)are off. 2. Startthe engine,and hold it at 3,000rpm with no l o a d{ i n n e u t r a l u) n t i lt h e r a d i a t o fra n c o m e so n , o r u n t i lt h e e n g i n ec o o l a n t t e m p e r a t u r e a c h e s1 9 4 " F (90'c). 3. Let the engine idle for about 5 minuteswith the throttlefully closed. NOTE:lf the radiatorfan comes on, do not includeits r u n n i n gt i m e i n t h e 5 m i n u t e s . 11-139 FuelSupplySystem ComponentLocationIndex { PUMP T e s t ,p a g e1 1 - 1 4 1 page 11'153 Fleplacement, FUELFILTER page 11-152 Replacement, FUELGAUGESENDINGUNIT T e s t ,p a g e1 1 - 1 5 6 page 11-153 Replacement, FUELPRESSUN REGULATOR page'11-'152 Replacement, FUELFILLCAP FUELTANK R e p l a c e m epnat ,g e '1l - 1 5 5 FUELTUBE/OUICK.CONNECT FITTINGS page 11-148 Precautions, p a g e Removal, 11-'149 Installation,page 11-'l50 FUELFEEDLINE FUELVAPORLINE a FUELPULSATIONDAMPER page11'154 Replacement, i . . / PGM.FIMAIN RELAY1 PGM.FIMAINRELAY2 T r o u b l e s h o o t ipnagg, e ' l ' l - 1 4 1 11-140 FuelPumpCircuitTroubleshooting lf you suspecta problemwith the fuel pump, checkthat the fuel pump actuallyruns;when it is on, you will hear some noise if you listento the fuel fill port with the fuel fill cap removed.The fuel pump should run for 2 secondswhen the ignition switch is first turned on. lf the fuel pump does not make noise,checkas follows: 5. N4easure voltage betweenPGM-Flmain relay 2 5P connectorterminal No. 1 and body ground. PGM.FI MAIN RELAY2 5P CONNECTOR 1. Turn the ignition switch OFF. 2. Removethe glove box {seepage 20-63),then removethe PGM-FImain relay 2 (A). Wire side oJfemaleterminals ls there battery voltage? YES Go to step 6. NO Repairopen in the wire betweenthe underd a s hf u s e / r e l a yb o x a n d P G M - Fm l a i n r e l a y2 . 1 6. Turn the ignition switch OFF. 3 . Turn the ignitionswitch ON {ll). Measurevoltage betweenPGM-Flmain relay 2 5P connectorlerminal No. 5 and body ground. PGM.FIMAIN RELAY2 5P CONNECTOR 7. DisconnectECMconnectorE (31P). 8. Checkfor continuitybetweenPGM-FImainrelay2 5P connectorterminal No. 3 and ECMconnector t e r m i n a lE 1 . PGM-FIMAIN RELAY2 5PCONNECTOB E t 2 l Ftxm IGPl (YEL/BLK} 7 - z IMOFPR (GBN/ YEL) ECMCONNECTOR E 131P} Wiresideof femaleterminals Wire side of femaleterminals ls there battery voltage? ls therecontinuity? YES-Go to step 5. YES-Go to step9. NO Repairopen in the wire betweenthe PGM'Fl m a i n r e l a y1 a n dt h e P G M - Fm l a i n r e l a y2 . t NO-Repairopenin thewire betweenthe PGMFl m a i nr e l a y2 a n dt h eE C M( E 1 ) . 1 (cont'd) 11-141 FuelSupplySystem FuelPumpCircuitTroubleshooting(cont'dl l a i n r e l a y2 . L R e i n s t a l l t hP e G M - Fm ( ls there battery voltage? 1 0 .T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . YES U pdatethe ECM if it does not havethe latest so{1ware,or substitutea known-goodECM.then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe o r i g i n aE l CM.I 1 ' ] .Measurevoltage betweenECI\4/PCM connector t e r m i n a lE 1a n d b o d y g r o u n d . ECMCONNECTOB E {31P) NO Go to step 15. t5. Turn the ignition switch OFF. to. Removethe rear seat cushion (seepage 20-80). 1 1 . Removethe accesspanelfrom the floor. Wiresideof femaleterminals ls there battety voltage? 1 8 . Measurevoltage betweenfuel pump 5P connector terminal No. 5 and body ground within the first 2 secondsafter the ignition switchwas turned ON (ll). FUELPUMP5P CONNECTOR YES Go to step 12. l a i n r e l a y2 . 1 N O - R e p l a c et h e P G M - Fm ( Turn the ignition switch OFF. 1 3 .ReconneclECMconnectorE (31P). 1 4 .Turn the ignitionswitch ON (ll),and measure voltagebetweenECMconnectorterminal E1 and body ground within the first 2 secondsafterthe i g n i t i o ns w i t c hw a s t u r n e dO N ( l l ) . wire sideoI femaleterminals ls there battery voltage? E (31PI ECMCONNECTOR YES Go to step 24. N O - G o t o s t e p1 9 . 1 9 . Turn the ignition switch OFF. 20. R e m o v et h e P G M - Fm l a i n r e l a y2 . Wiresideof femaleterminals 11-142 21. ConnectPGM-Flmain relay 2 5P connector terminalsNo. 1 and No. 2 with a iumDerwire. PGM.FIMAIN RELAY2 5P CONNECTOR FUEL PUMP (YEL/ GRN) JUMPER WIRE FNI tri rcr fv {YEL/BLK) A 25. Checkfor continuitybetweenfuel pump 5P connectorterminal No. 4 and body ground. FUELPUMP5P CONNECTOR E dffi Wiresideof {emaleterminals Wire side of femaleterminals 22. Turn the ignitionswitch ON (ll). ls therecontinuity? 23. Measurevoltagebetweenfuel pump 5P connector Y E S R e p l a cteh ef u e lp u m p . l terminal No. 5 and body ground. FUELPUMP5PCONNECTOR NO-Repairopenin thewire betweenthefuel p u m p5 Pc o n n e c t oarn dG 5 5 1 . 1 Wiresideol femaleterminals ls there battery voltage? Y E S R e p l a c e t h eP G M - Fm l a i nr e l a y 2 . t NO-Repair open in the wire betweenthe PGM-Fl main relay 2 and the fuel pump 5P connector.l 24. Turn the ignitionswitch OFF. 11-143 FuelSupplySystem FuelPressureRelieving Beforedisconnectingfuel lines or hoses,relieve pressurefrom the system by disconnectingthe fuel tube/quickconnectfitting in the enginecompartment. 9. Placea rag or shop towel over the quick-connect fitting (A). 1 . T u r nt h e i g n i t i o ns w i t c hO F F , 2 . R e m o v et h e P G M - Fm l a i n r e l a y2 ( A ) . 1 0 .Disconnectthe quick-connectfifting (A):Hold the connector(B)with one hand and squeezethe retainertabs (C)with the other handto release them from the lockingpawls {D).Pullthe connector off. 3 . S t a r t t h ee n g i n e a, n d l e t i t i d l e u n t i li t i s s t a l l s . NOTE:The DTCSor TemporaryDTCSP0301.P0302, P0303,P0304may come on during this procedure. lf any DTCSare stored,ignorethem. 4 . Turn the ignitionswitch OFF. Removethe fuel fill cap, and relievefuel pressure inthefueltank. 6 . Removethe enginecover. NOTE: . P r e v e ntth e r e m a i n i n gf u e l i n t h e f u e lf e e d l i n e o r hosefrom flowing out with a rag or shop towel. . Be carefulnotto damagethe line (E)or other parts. . Do not use tools. . l f t h e c o n n e c t o r d o e ns o t m o v e ,k e e p t h er e t a i n e r tabs presseddown, and alternatelypull and push the connectoruntil it comes off easily. . Do not removethe retainerfrom the line; once removed,the retainermust be replacedwith a new one. 7 . Disconnectthe negativecablefrom the battery. 8 . Checkthe fuel quick-connectfitting for dirt, and cleanit if necessary. 1 1 After disconnectingthe quick-connectfifting, check i t f o r d i r t o r d a m a g e( s e ep a g e11 - 1 4 9 ) . 11-144 FuelPressureTest Special Tools Required . Fuel pressuregauge 07406-0040004 . Fuel pressuregaugesel 07ZAJ-S5A0100 1 . R e l i e v et h e f u e l p r e s s u r e( s e ep a g e1 ' 1 - 1 4 4 ) . 2. Disconnectthe quick-connectfitting (A).Aftachthe fuel pressuregaugeset and fuel pressuregauge. Startthe engineand let it idle. . lf the enginestarts,goto step 5. . lf the enginedoes not start,goto step 4. Checkto see if the fuel pump is running:listento the fuel fill port with the fuel fill cap removed.The fuel pump should run for 2 secondswhen the ignitionswitch is first turned on. . lf the pump runs,go to step 5. . l f t h e p u m p d o e sn o t r u n ,d o t h e f u e l p u m pc i r c u i t t r o u b l e s h o o t i n(gs e ep a g e11 - 14 1) . 5 . Readthe pressuregauge.The pressureshould be 320-370 kpa (3.3-3.8 kgf/cm',a7-52 psi) . lf the pressureis OK, the test is complete. . lf the pressureis out of specification,replacethe fuel pressureregulatorand the fuel filter (see p a g e1 1 - 1 5 2 t) h, e n r e c h e c kt h e f u e l p r e s s u r e . 11-145 FuelSupply System FuelLineInspection Checkthe fuel system lines,hoses,and fuel filter for damage,leaks,and deterioration.Replaceany damagedparts. \ Makesurethe connectionis secureand the quick-connect fitting cover is firmly lockedinto place. 11-146 Checkall clampsandretightenif necessary. A: Do notdisconnect the hosefromthe lineat theseioints. Settheboltflange T h e r es h o u l d b e n o W.W C l a m pi n t h e m i d d l e . Setthispart C l a m pi n t h e m i d d l e . t h e f u e l { i l lt u b e , a l i g nt h e m a r k s on the tubeand t h el i n e . 11-147 FuelSupply System FuelLine/Ouick-Connect FittingsPrecaution The fuel tube/quick-connect fittings connectthe fuel rail (A)to fuel feed hose (B),the fuel feed hose (B)to the f u e l l i n e( C ) ,a n dt h e f u e l t u b e( D )t o t h e f u e l p u m p a s s e m b l y( E ) .W h e n r e m o v i n go r i n s t a l l i n g t h ef u e l f e e d hose,fuel pump assembly,or fuel tank, it is necessary to disconnector connectthe quick-connectfittings. Pay attentionto the following: . T h e f u e lf e e dh o s e( B ) ,f u e lt u b e ( D ) ,a n d q u i c k connectfittings (F)are not heat-resistanU be careful not to damagethem during welding or other heatgeneralrngproceoures. . T h ef u e l f e e dh o s e( B ) ,f u e l t u b e( D )a n d q u i c k connectfittings (F)are not acid-proof;do not touch them with a shop towel which was used for wiping batteryelectrolyte.Replacethem if they came into contactwith electrolyteor somethingsimilar. . When connectingor disconnectingthe fuel feed hose (B),fuel tube (D),and quick'connectfittings (F).be carefulnot to bend or twist them excessivelv.ReDlace them it they are damaged. A disconnectedquick-connectfitting can be reconnected,but the retaineron the mating line cannot be reusedonce it has been removedfrom the line. Replacethe retainerwhen . . . . . . . replacingthe fuel rail. replacing t h ef u e ll i n e . replacingthe fuel pump. replacingthe fuel filter, replacingthe fuel gaugesendingunit. it has been removedfrom the line. it isdamaged. PART I\4ANUFACTUREB RETAINER COLOR EN GI N E TOKAI GREEN COI\4PARTMENT ( F U EF LEED H O S EF; UE L L I N ES I D E ) E NGI N E TOKAI BLU COIVIPARTMENT ( F U EF LEED H O S EF: U E L R A I LS I D E ) FUELTANK WHITE SANOH UNIT 11-148 I FittingsRemoval FuelLine/Ouick-Gonnect 1 . R e l i e v ef u e l p r e s s u r e( s e ep a g e1 ' l - 1 4 4 ) . 2 . Checkthe fuel quick-connectfiftingsfor din, and clean if necessary. Hold the connector(A) with one hand and squeeze the retainertabs(B)with the other hand to release them from the lockingpaws (C).Pullthe connector off. NOTE: . B e c a r e f u ln o t t o d a m a g et h e l i n ei D ) o r o t h e r parts.Do not usetools. . lf the connectordoesnot move, keepthe retainer tabs presseddown, and alternatelypull and push the connectoruntil it comes off easily. . Do not removethe retainerfrom the line; once removed,the retainermust be replacedwith a new one. 4. Checkthe contactarea (A) of the line (B)for dirt and d am a g e . . lf the surfaceis dirty, clean it. . if the surfaceis rusty or damaged,replacethe f u e l p u m p ,f u e l f i l t e r f, u e l f e e dl i n e . =k To preventdamagedand keepforeign matter out, cover the disconnectedconnectorand line end with plasticbags (A). NOTE: . The retainercannot be reusedonce it has been r e m o v e df r o m t h e l i n e . Replacedthe retainerwhen - replacing t h e f u e lr a i l . - r e p l a c i n gt h e f u e lf e e dI i n e . - r e p l a c i n gt h e f u e l p u m P . - replacingthe fuel filter. - replacing t h e f u e l g a u g es e n d i n gu n i t - it has been removedfrom the line. - it is damaged. 11-149 FuelSupply System FuelLine/Ouick-Connect Fittingslnstallation 1. Checkthe contacta rea (A) of the line (B)for dirt and damage,and clean if necessary. Inserta new retainer(A) into the connector(B) if the retaineris damaged,or after . r e p l a c i n gt h e f u e l r a i l . . replacingthe fuelfeed line. . replacingthe fuel pump. . replacingthe fuel filter. . r e p l a c i n gt h e f u e l g a u g es e n d i n gu n i t . removingthe retainerfrom the line. 11-150 3. Beforeconnectinga new fueltube/quick-connect fitting assembly(A),removethe old retainerfrom t h e m a t i n ol i n e , 4. Align the quick-connectfittingswith the line (A). a n d a l i g nt h e r e t a i n e (r B )l o c k i n gp a w l sw i t h t h e connector{C)grooves.Then pressthe quickconnectfittings onto the line until both retainer p a w l sl o c kw i t h a c l i c k i n gs o u n d . 5. lvlakesure the connectionis secureand that the p a w l sa r ef i r m l y l o c k e di n t o p l a c e c; h e c kv i s u a l l y and by pullingthe connector. N O T E ;l f i t i s h a r dt o c o n n e c tp, u t a s m a l la m o u n to f n e w e n g i n eo i l o n t h e l i n ee n d . Connectionwith new retainer: 6. Reconnectthenegativecableto the battery,and t u r n t h e i g n i t i o ns w i t c hO N ( l l ) .T h e f u e l p u m p w i l l run for about 2 seconds,and fuel pressurewill rise Repeat2 or 3 times, and checkthat there are no fuel leaks. Reconnectionto existing retainer: 11-151 FuelSupply System FuelPressureRegulator Replacement 1 . R e m o v et h e f u e l p u m p ( s e ep a g e11 - 1 5 3 ) . 2 . Removethe fuel pressureregulator(A). FuelFilterReplacement The fuel filter should be replacedwheneverthe fuel pressuredrops belowthe specifiedvalue {270 320 kpa, 2.8 3.3 kgflcm', 40 47 psi),after makingsure that the fuel pump and the fuel pressureregulatorare OK. 1 . R e m o v et h e f u e l p u m p ( s e e p a g e l l - ' 1 5 3 ) . 2. Removethe fuel filter (A). @-to Re IJ e"^ ^e g s AR ...\ @n-) s g Installthe part in the reverseorder of removalwith a n e w o - r i n g( B ) . Installin the reverseorder of removalwith a new basegasket(B)and a new o-ring (C),then check these items: ' When connectingthe wire harness,make sure the connectionis secureand the terminal (D) is firmly lockedinto place. . W h e ni n s t a l l i n g t h e f u e l g a u g es e n d i n gu n i ti E ) , make sure the connectionis secureand the connectoris firmly lockedinto place.Be careful not to bend or twist it excessively. 11-152 \ { FuelPump/FuelGaugeSendingUnit Replacement SpecialToolsRequired F u e ls e n d e rw r e n c h0 7 X A A - 0 0 1 0 1 0 A 8 . R e m o v et h e l o c k n u (t A )a n d t h e f u e lt a n k u n i t . 1 . R e l i e v et h e f u e l p r e s s u r e( s e ep a g e1 1 - 1 4 4 ) . Removethe fuel fill cap. Removethe seat cushion(seepage 20-80). Removethe accesspanel (A)from the floor. 5 . D i s c o n n e ct h t e f u e l p u m p 5 Pc o n n e c t o(rB ) . Disconnectthe quick-connectfitting {C)from the f u e lt a n ku n i t . 7 . U s i n gt h e s p e c i atlo o l ,l o o s e nt h e f u e lt a n ku n i t locknut(A). t h e h o o k ( P )a n d 9 . R e m o v et h e s t o p p e r{ O ) .R e l e a s e r e m o v et h e f u e lf i l t e r( B ) ,t h e f u e l g a u g es e n d i n g u n i t ( C ) .t h e c a s e( D ) ,t h e w i r e h a r n e s s( E ) ,a n d t h e fuel pressureregulator(F). t h e f u e lt a n k u n i t ,m a k es u r et h e 1 0 . W h e nc o n n e c t i n g i s s e c u r ea n d t h e s u c t i o nf i l t e r( G )i s connection t o t h e f u e lp u m p ( H ) . f i r m l yc o n n e c t e d 1 1 . I n s t a ltl h e f u e lt a n ku n i t i n t h e r e v e r s eo r d e ro f r e m o v aw l i t h a n e w b a s eg a s k e t( l ) a n dn e w o - r i n g s ( J ) ,t h e nc h e c kt h e s ei t e m s : 93 N.m 19.5kgf.m,69 lbf.ftl . W h e nc o n n e c t i n tgh e w i r e h a r n e s sm , a k es u r e t h e c o n n e c t i o ni s s e c u r ea n d t h e c o n n e c t o(rK )i s f i r m l y l o c k e di n t ot h e p l a c e . . W h e n i n s t a l l i n gt h e f u e l g a u g es e n d i n gu n i t , make sure the connectionis secureand the c o n n e c t oirs f i r m l y l o c k e di n t o p l a c e .B e c a r e f u l not to bend or twist the connectorexcessively. . W h e ni n s t a l l i n g t h e f u e l t a n ku n i t ,a l i g nt h e m a r k s ( L )o n t h e f u e lt a n k( M ) a n d t h e f u e lt a n k u n i t( N i 11-153 FuelSupply System FuelPulsationDamperReplacement 1 . R e l i e v et h e f u e l p r e s s u r e ( s e e p a g e l l - 1 4 4 ) . 2. Removethe enginecover. 3. Removethe fuel rail mounting nuts from the fuel rail. 4 . R e m o v et h e g r o u n dc a b l e( G1 0 1 . 5 . R a i s et h e f u e l r a i l . 6 . P l a c ea w r e n c h( A )o n t h e f u e l r a i l( B ) . 7 . P l a c ea w r e n c h( C )o n t h e f u e l p u l s a t i o nd a m p e r( D ) . 8. Removethe pulsationdamper. 9. Installthefuel pulsationdamper in lhe reverse order of removalwith new washers. NOTE: . Replaceall washerswhenever the fuel pulsation damper is loosenedor removed, . l f t h e d r a i nh o l e( A )o f t h e f u e l p u l s a t i o n d a m p e r cover does not face bottom, reinstallit as shown. 11-154 FuelTank Replacement 1 . R e l i e v e t h e f u epl r e s s u r e( s e ep a g e1 1 - 1 4 4 ) . 2 . D r a i nt h e f u e lt a n k :R e m o v et h e f u e l p u m p ( s e ep a g e11 - 1 5 3 )U. s i n ga h a n dp u m p ,h o s e ,a n d c o n t a i n esr u i t a b l ef o r gasoline.draw the fuel from the fuel tank. 3 . Jack up the vehicle,and suppon it with safetystands. Removethe fuel pipe cover (A).Disconnectthe fuel vapor hose and quick-connectfittings. Disconnectthe hoses.Slide backthe clamps (B),then twist the hosesas you pull to avoid damagingthem. (} A \ 38N.m (3.9ksf.m,28lbfft) 5. Placea jack or other supportunder the tank. 6 . R e m o v e t h es t r a pb o l t s ,a n d l e t t h e s t r a p( C )h a n g f r e e . 7 . R e m o v et h e f u e lt a n k ( D ) .l f i t s t i c k s t o t h eu n d e r c o a t o ni t s m o u n t ,c a r e f u l l yp r y i t o f f t h e m o u n t 8. Installthe parts in the reverseorder of removal. 11-155 FuelSupply System FuelGaugeSendingUnit Test Special Tools Required Fuelsenderwrench 07XAA-001010A NOTE;For the fuel gauge system circuitdiagram,refer to the GaugesCircuitDiagram(see page 22-58||. 1 . C h e c k t h eN o . 1 0 f U E T E R { 7 . 5 A ) f u s ei n t h e u n d e r dash fuse/relaybox beforetesting. 7. Measurevoltage betweenfuel pump 5P connector terminalsNo. 1 and No. 2 with the ignition switch ON (ll).There should be batteryvoltage. . lf the voltage is as specified,go to step 8. . l f t h e v o l t a g ei s n o t a s s p e c i f i e d , c h e c k f o r : - a n o p e n i n t h e Y E U B L Ko r B L Kw i r e . - p o o r g r o u n d( G 5 5 1 ) . 2. Do the gauge drive circuitcheck(see page 22-56|l. ' lf the fuel gauge needlesweepsfrom minimuni to maximum positionand then returnsto the m i n i m u mp o s i t i o nt.h e g a u g ei s O K .G o t o s t e p3 . . lf the fuel gauge needle does not sweep from m i n i m u mt o m a x i m u mp o s i t i o np o s i t i o na n d then returnto the minimum position,replacethe gauge assemblyand retest. FUELPUMP5PCONNECTOR 3 . T u r nt h e i g n i t i o ns w i t c hO F F . 4. Removethe rear seat cushion{seepage 20-80). Wiresideof femaleterminals 5. Removethe accesspanel (A)from the floor. -ztr Turn the ignition switch OFF.Removethe No. 9 BACKUP (7.5A)fusefrom the under-hoodfuse/ relay box for at least 10 seconds,lhen reinstallit. Installa 2 Q resistorbetweenfuel pump 5P connectorlerminals No. 1 and No. 2, then turn the i g n i t i o ns w i t c hO N ( l l ) . FUELPUMP5P CONNECTOR -VVV{Y {YEL/BLK) 2 9 RESISTOR, =-a \ (elrt \ \ 4 //, 5 / Wire side of femaleterminals 6. Disconnectthe fuel pump 5P connector{B). 11-156 1 0 . C h e c k t h a t t h ep o i n t e r o ft h e f u e lg a u g ei n d i c a t e s "F". . lf the pointerdoes not indicate"F", replacethe g au g e . . lf the pointerindicates"F", inspectthe fuel gauge sendingunit. NOTE:The pointerof the fuel gauge returns to the bottom of the gaugedial when the ignition switch is OFF,regardlessof the fuel level.11. Relievethe fuel pressure(seepage 11-144\. 1 2 . R e m o v et h e f u e l f i l l c a p . 1 5 . M e a s u r er e s i s t a n cbee t w e e nt h e N o . 1 a n d N o . 2 'l12 terminalswith the float at E (EN4PTY), \HALF F U L L )a, n d F { F U L L p ) ositions. lf you do not get the following readings,replacethe f u e l g a u g es e n d i n gu n i t{ s e ep a g e1 ' 1 - 1 6 3 ) . F Float Position Resistance 1 1 {0) to 13 'U2 68,5 to 74.5 LOW E 114.4 130 to 126.6 to 132 NOTE:Removethe No. 9 BACKUP (7.5A)fuse from the under-hoodfuse/relaybox for at least 10 secondsafter completingtroubleshooting, otherwiseit may take up to 20 minutesfor the fuel gaugeto indicatethe correctfuel level. 13. Disconnectthe quick-connectfittingsfrom the fuel pump. 1 4 . U s i n gt h e s p e c i atlo o l ,l o o s e nt h e f u e lt a n ku n i t locknut(A). A 93Nm {9.5ksf.m,69 lbf.ft} 11-157 FuelSupply System Low FuelIndicatorTest 1 . Do the fuel gauge sendingunit test (seepage 11, rcol. . lf the system is OK, go to step 2. . lf the system has any malfunction,repair it. Turn the ignition switch OFF.Removethe No. 9 BACKUP (10A)fuse from the under-hoodfuse/ relay box for at least30 seconds,then reinstallit. Turn the ignition switch ON (ll)with the float at the E (EMPry) position. . lf the low fuel indicatoris on, go to step 4. . lf the low fuel indicatoris not on, referto the low fuel indicatorCircuitDiagram(seepage 22-58) and checkthe circuit. 4, Turn the ignition switch OFF.Removethe No. 9 BACKUP (10A)fuse from the under-hoodfuse/ relay box for at least30 seconds,then reinstallit. Lift the float above the LOW position. . l f t h e l o w f u e li n d i c a t o r g o eo s f f , t h es y s t e mi s O K . . lf the low fuel indicatoris still on, referto the low fuel indicatorCircuitDiagram{seepage 22-58), and checkthe circuit. 11-158 \, IntakeAir System ComponentLocationIndex i INTAKE AIR BYPASSCONTROL THERMALVALVE Test,page 1'1-161 THROTTLEBODY Test,page l'l-160 page 11-165 Removal/lnstallation, page 11 166 Disassembly/Reassembly, l . AIR CLEANER R e p l a c e m e npt a, g e11 ' 1 6 2 AIR CLEANERELEMENT R e p l a c e m e npta, g e11 - 1 6 2 THROTTLE CABLE page11-163 Adjustment, R e m o v a l / l n s t a l l apt a i ogne1, 1 - 1 6 4 11-159 IntakeAir System Throttle BodyTest NOTE: . Do not adjustthe throttlestop screw. lt is presetat the factory. . lfthe malfunction i n d i c a t o lra m p ( M l L )h a sb e e n reportedon, checkfor diagnostictrouble codes ( D L C S()s e ep a g e1 1 3 ) . 1. With the engine off, checkthe throttle cable movement.The cableshould move without binding or sticking. . lf lhe cable moves OK, goto step 2. . lf the cable binds or sticks,checkit and its routing. . l f t h e c a b l ei s f a u l t y ,r e r o u t ei t o r r e p l a c ei t a n d a d j u s ti t ( s e ep a g e1 1 - 1 6 3 )t h , e ng o t o s t e p2 . 2. l\4ovethe throttle lever by hand to see if the throftle valve and/or shaft are too looseor too tight. . lf there is excessiveplay in the throttlevalve shaft,or any binding in the throttlevalve at the fully closedposition,replacethe throttle body. . l f t h e t h r o t t l e v a l v ea n d s h a f ta r e O K ,g o t o s t e p 3 . 3. Connectthe scantoolto the DLC. T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . 5 . Checkthe throttle positionwith the scantool. The readingshould be about 10%when the throttle is fully closedand about 90% when the throttle is fully openeo. . lf the throttle positionis correct,the throttle body is OK. . lf thethrottle positionis notcorrect,replacethe throttle body. 11-160 ! Test IntakeAir BypassGontrolThermalValve Special Tools Required Vacuum Pump/Gauge,0 30 in. Hg A973X-041-XXXXX , n d m a k es u r e 5 . R a i s ea n d l o w e rt h e e n g i n es p e e d a the vacuum gauge readingdoes not changeas the rpm cnanges. 1 . S t a nt h e e n g i n e T . h e nl e t i t i d l € . NOTE:The enginecoolanttemperaturemust be b e l o w1 4 9 ' F ( 6 5 ' C ) . 2 . R e m o v et h e v a c u u mh o s e( A ) f r o mt h e i n t a k ea i r duct, and connecta vacuum pump/gaugeto the nose. lf the vacuum readingchanges,checkfor these proorems: . l\4isrouted, leaking,broken,or cloggedintakeair bypasscontrol systemvacuum lines. . A crackedor damagedintakeair bypasscontrol t h e r m a lv a l v e . . n d m a k es u r e 3 . R a i s ea n d l o w e r t h ee n g i n es p e e d a t h e v a c u u mg a u g er e a d i n gc h a n g e sa s t h e e n g i n e speeocnanges. lf the vacuum readingdoes not change,checkfor these problems: . M i s r o u t e dl,e a k i n gb, r o k e n o, r c l o g g e di n t a k ea i r bypasscontrol system vacuum lines. . A crackedor damagedintakeair bypasscontrol t h e r m a lv a l v e . 4 . H o l dt h e e n g i n ea t 3 , 0 0 0r p m w i t h n o l o a d( i n neutral)until the radiatorfan comes on, then let it i dl e . 11-161 IntakeAir System Air CleanerReplacement 1. Removethe nuts (A) and the stud (B). Air CleanerElementReplacement 1 . D i s c o n n e ct h t e P C Vh o s e1 A ) . {0.3kgf m,2lbf.ft) 2. Removethe air cleaner(C). 2 . O p e nt h e a i r c l e a n e rh o u s i n gc o v e r( B ) . 3 . Installin the reverseorder of removal. 3 . R e m o v et h e a i r c l e a n e r( C )f r o m t h e a i r c l e a n e r h o u s i n g( D ) . 4 . Installin the reverseorder of removal. 11-162 \, Throttle CableAdjustment 1 . Checkcablefree play at the throttle linkage.Cable f r e e p fa v ( A )s h o u l db e 1 0 1 2 m m ( 3 / 8 1 / 2i n . ) . lf the free play is not within spec (10- 12 mm, 3 1 8 - 1 1 2 l n . l , l o o s etnh e l o c k n u (t B ) ,t u r n t h e adjustingnut (C)untilthe free play is as specified, then retightenthe locknut. With the cable properlyadjusted,checkthe throttle valve to be sure it opens fully when you push the acceleratorpedalto the floor. Also checkthe throttlevalve to be sure it returnsto the idle positionwheneveryou releasethe accelerator peoar. 11-163 IntakeAir System Throttle CableRemoval/lnstallation 1. Fully open the throttlevalve,then removethe throttle cable (A)from the throttle link (B). Installin the reverseorder of removal. 5 . After installing,startthe engine.Holdthe engine at 3,000rpm with no load (in neutral)untilthe radiator fan comes on, then let it idle. H o l dt h e c a b l e ,r e m o v i n ga l l s l a c kf r o m i t . 7 . Set the locknuton the cable bracket{A). Turn the adjustingnut (B)so that its free play is 0 mm. T h e s h o u l db e no crearance. (P/N08?98-9002) 2 . R e m o v et h e c a b l eh o u s i n g( C ) f r o mt h e c a b l e bracket(D). ('1.0kgf.m, 7.2 tbf.ftl ! 3 . Removethe throttlecable (A)from the accelerator p e d a l( B ) . 8 . Removethe cablefrom the cable bracket(A).Set the adjustingnut on the other side of the throttle bracket,then tightenthe locknut{C}. 9 . With the cable properlyadjusted,checkthe throttle valve to be sure it opensfully when you push the acceleratorpedalto the floor. Also checkthe throttlevalveto be sure it returnsto the idle positionwheneveryou releasethe accelerator Deoat. SILICONE GREASE B (P/N08798-9002) 11-164 Throttle Body Removal/lnstallation NOTE: ' Do not adjustthe throttle stop screw. . A f t e r r e a s s e m b l y , a d j u s t t h e t h r o t t l e c a b l e { s e e p a g e l l - 1a6n3d)t h e c r u i s ec o n t r o lc a b l e( s e ep a g e4 - 4 5 ) . . The throttle position(TP)sensoris not removable. THROTTLE LEVER Thereshould be noclearance THROTTLECABLE MANIFOLD ABSOLUTEPRESSURE {MAP}SENSOR 22Nm (2.2 kgt.m, 16 lbf.ft) EVAPORATIVEEMISSION{EVAPI CANISTERPURGEVALVE IDLEAIR CONTROL {IACI VALVE 11-165 IntakeAir System Throttle Body Disassembly/Reassembly 2 N.m {0.2 kgt m, 1 lbf.ft) A V MAPSENSOR EMISSION EVAPORATIVE {EVAP) PURGE VALVE CANISTER L TPSENSOR THROTTLEBODY 3.5 N.m (0.35kgf m.2.5lbf ft) 11-166 CatalyticConverterSystem DTCTroubleshooting DTCP0420:CatalyticSystemEfficiency BelowThreshold NOTE:lf some of the DTCSlistedbelow are storedat the same time as DTCP0420,troubleshootthose DTCS first, then recheckfor DTCP0420. P 0 1 3 7P, 0 1 3 8S: e c o n d a r yH e a t e dO x y g e nS e n s o r (secondaryHO2S)(Sensor2) r )heater P 0 1 4 1S: e c o n d a r yH O 2 S( S e n s o 2 1 . R e s e t h e E C M{ s e ep a g e1 ' l - 4 }t,h e nc o n t i n u et o step 2 through 5 to resetthe readinesscode. 2. Startthe engine.Hold the engineat 3,000rpm with n o l o a d( i n n e u t r a lu) n t i l t h er a d i a t o fr a n c o m e so n . D r i v ef o r a b o u t l 0 m i n u t e sw i t h o u ts t o p p i n gY. o u r speeocan vary. 4 . With the transmissionin 4th gear,drive at a steady speed between50 62 mph (80-'100 km/h)for 30 seconds. Repeatstep 4 three times. Betweeneach repetition, closethe throttlecompletelyfor 1 2 seconds.lf the engine is stoppedduring this part of the procedure,repeatsteps3, 4 and 5. Checkfor a TemporaryDTCwith the scantool. Does the scan tool indicate Temporaty DTC P0420? YES Checkthe TWC. lf necessary,replacethe TWC.I N O C h e c kf o r r e a d i n e s cs o d ec o m p l e t i o nl.f t h e readinessis complete,it was a interminentfailure, and the system is OK at this time. lf the readiness code is incomplete,repeatsteps2 through 5.1 11-167 PCVSystem DTCTroubleshooting DTCP1505:PCVAir Leakage 1 . R e s e t h e E C M( s e ep a g e1 1 - 4 ) . 2. Startthe engine.Hold the engineat 3,000rpm with n o l o a d( i n n e u t r a l u) n t i lt h e r a d i a t o fra n c o m e so n 3. Letthe engineidle tor al least40 secondswith the throttlefully closed. 4. Checkfor a DTCP1505with the scantool ls DTC P1505 indicated? YES-Check these partsfor vacuum leaks l . . . . . PCVvalve PCVhose EVAPcanisterpurge valve Throttlebody Brakeboosterhose NO - Intermittentfailure,system is OK at this time.l 11-168 PCVValve Inspectionand Test 1. Checkthe PCVvalve (A),hoses{B),and connectionsfor leaksor restrictions. PCVValve Replacement 'L Disconnectthe PCVhose. Removethe PCVvalve (A). 2 . At idle, make sure there is a clickingsound from the PCVvalve when the hose betweenthe PCVvalve a n d i n t a k em a n i f o l di s l i g h t l yp i n c h e d{ A ) w i t hy o u r f i n g e r so r p l i e r s . lf there is no clickingsound,checkthe PCVvalve grommet for cracksor damage.lf the grommet is OK. reDlacethe PCVvalve and recheck. (4.5kgf.m,33lbf.ft) l parts in the reverseorder of removal 3 . I n s t a lthe with a n e w g a s k e t( B ) . 11-169 EVAPSystem ComponentLocationIndex EVAPORATIVEEMISSIONIEVAPI CANISTERPURGEVALVE Troubleshooting, 'l1-175, step 3 on page s t e p1 o n p a g e1 1 - 1 8 0 FUELTANK VAPORCONTROLVALVE Test,page 11'187 R e p l a c e m e npt a, g e1 1 1 8 9 EVAPORATIVEEMISSION{EVAPI CANISTER Troubleshooting, step 28 on page 11'183 page 11-189 Replacement, SENSOR FUELTANKPRESSURE T r o u b l e s h o o t ipnagg, e11 - 1 7 1 EVAPORATIVEEMISSION{EVAP} BYPASSSOLENOIDVALVE Troubleshooting, p a g e' 1 1 ' 1 7 6 , s t e p1 ' 120o n s t e p o n p a g e1 1 1 8 1 EVAPORATIVEEMISSION{EVAP) CANISTERVENT SHUT VALVE Troubleshooting, step 23 on page 1'l 178, s t e p1 go n p a g el 1 - 1 8 2 11-170 EVAPOBATIVEEMISSON{EVAP) VALVE TWO WAY 'l1-'186 Test,page DTCTroubleshooting DTCP0451:FTPSensorRange/Performa nce Problem 6. Connecta vacuum pump to the open end of the hose. SpecialTools Required Vacuum Pump/Gauge,0-30 in. Hg A973X-041-XXXXX 1 . R e m o v et h e f u e lf i l l c a p . 2. Turn the ignition switch ON (ll) 3. l\4onitorfuel tank pressure(FTP)sensorvoltage with the HondaPGM Tester,or medsurevoltage betweenECMconnectorterminalsE4 and E14. ECMCONNECTOR E 131P) 7 . Turn the ignition switch ON {ll). 8 . l\4onitorFTPsensorvoltagewith the Honds PGM Tester,or measurevoltage betweenECM c o n n e c t otre r m i n a l sE 4 a n d E 1 4 ,a n d c a r e f u l l y s q u e e z et h e v a c u u mp u m p a l i t t l e . ECMCONNECTOR E 13lPI W i r es i d eo f f e m a l tee r m i n a l s ls there about 2.5V? YES-Go to step 4. NO Replacethe FTPsensor.I 4 . Turn the ignitionswitch OFF. Wiresideof lemaleterminals 5 . Disconnectthe hose betweenthe EVAPtwo way valve and the FTPsensorat the EVAPtwo way valve end. 9 . The voltageshould smoothly drop from about 2.5 V t o a b o u t1 . 5V . S t o pa p p l y i n gv a c u u mw h e n t h e voltagedrops to about 1.5V or damageto the FTP sensormay occur. Does the voltage drop to about 1.5 V and hold? YES Checkfor misrouted,leaking,or brokenFTP s e n s o rv a c u u ml i n e s .l f t h e v a c u u ml i n e sa r e O K , updatethe ECM if it does not havethe latest software.or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CM.I NO Replacethe FTPsensor.! 11-171 EVAPSystem DTCTroubleshooting(cont'd) DTCP0452:FTPSensorCircuitLow Voltage 1. Checkthe vacuum lines at the FTPsensorfor misrouting,leakage.breakage,or clogging. 6. Turn the ignition switch OFF. 7 . R e i n s t a l l t h feu e lf i l l c a p . 8. Disconnectthe FTPsensor3P connector. Are the vacuumlines OK? 9. Turn the ignition switch ON (ll) YES Go to step 2. NO Repairor replacevacuum lines as necessary.I 10. Measurevoltage betweenFTPsensor3P connector t e r m i n a l sN o . 1 a n d N o . 2 . 3PCONNECTOR FUELTANKPRESSURE SENSOR 2 . R e s e t h e E C M( s e ep a g e1 1 - 4 ) . 3 . R e m o v et h e f u e l f i l lc a p . VCgl {YEL/BLU} 4. Turn the ignition switch ON (ll) 5. Monitor FTPsensorvoltagewith the HondaPGM Tester,or measurevoltage betweenbody ground and ECMconnectorterminal E14. E 131PI ECMCONNECTOR 1 2 t 3 t 45 ././114 22123241 t tc 26 o / Wiresideof femaleterminals 8 9 61./18 2C 21 271/ 29 31 TP (LTGRN) ls there about 5 V? '1. YES Go to step 1 NO-Repair open in the wire betweenthe FTP s e n s o ra n dt h e E C M{ E 5 ) . 1 Wire side of femaleterminals ls thete about2.5 V? YES- Intermittentfailure,system is OK at this time. Checkfor poor connectionsor looseterminalsat the FTPsensorand at the ECrM.l NO Go to step 6. 11-172 11. MeasurevoltagebetweenFTPsensor3P connector t e r m i n a l sN o . 2 a n d N o . 3 . FUELTANKPRESSUBE SENSOR3P CONNECTOR FTP(LT GBN) DTCP0453:FTPSensorCircuitHighVoltage 1. Checkthe vacuum lines at the FTPsensorfor misrouting,leakage,breakage,or clogging. Are the vacuumlines OK? Y E S - G o t o s t e p2 . N O R e p a i ro r r e p l a c ev a c u u ml i n e sa s necessary.I W i r e s i d eo f f e m a l e t e r m i n a l s 2 . R e s e t h e E C M{ s e ep a g e1 1 ' 4 ) . 3. Removethe fuel fill cap. ls there about 5 V? YES- Replacethe FTPsensor.t N O - G o t o s t e p1 2 . ' t 2 .Turn 4 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . 5. lvlonitorFTPsensorvoltagewith the Honda PGM Tester,or measurevoltage betweenbody ground a n d E C Mc o n n e c t otre r m i n a lE ' 1 4 . the ignitionswitch OFF. 1 3 .DisconnectECMconnectorE (31P), 1 4 .Checkfor continuitybetweenFTPsensor3P connectorterminal No. 3 and body ground. ECMCONNECTOR E 131PI 1 1 2 1 34 5 6 7 I 9 5 6 / t18 2C 21 24 2il./ 29 30 31 TP {LTGRN} FTPSENSOR3P CONNECTOB Wire side of femaleterminals FTP (LT GRNI Is there about 2.5 V? W i r es i d eo f f e m a l e l e r m i n a t s ls there continuity? YES Intermittentfailure,system is OK at this time. Checkfor poor connectionsor looseterminalsat t h e F T Ps e n s o ra n d a t t h e E C M . I NO Go to step 6. YES Repairshort in the wire betweenthe FTP s e n s o ra n d t h e E C I \ {4E 1 4 ) . I NO-Update the ECM if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodEClvl,replacethe originaE l CM.I {cont'd) 11-173 EVAPSystem DTCTroubleshooting(cont'dl 6. Turn the ignitionswitch OFF. 7 . R e i n s t al h l e f u e lf i l l c a p . 11, Measurevoltage betweenFTPsensor3P connector t e r m i n a lN s o . 2 a n dN o . 3 . FTPSENSOR3P CONNECTOR 8. Disconnectthe FTPsensor3P connector. 9 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . FTPILT GRN} '10. l\4easure voltage betweenFTPsensor3P connector t e r m i n a l sN o . 1 a n d N o . 2 . FTPSENSOR3P CONNECTOR VCC3(YEL/BLU) Wiresideof femaleterminals ls there about 5 V? YES Replacethe FTPsensor.l NO Go to step 12. Wire side of femaleterminals l\4easure voltage betweenECMconnector t e r m i n a l sE 4 a n d E1 4 , ls there about 5 V? Y E S G o t o s t e p1 1 . ECMCONNECTOR E (31P) NO-Repair open in the wire betweenthe FTP sensorand the ECM (E4).! W i r es i d eo f f e m a l tee r m i n a l s ls there about 5 V? YES Repairopen in the wire betweenthe FTP s e n s o ra n d t h e E C M( E 1 4 ) . I NO Updatethe ECM if it does not have the latest then software,or substitutea known-goodECN4. recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CM.I 11-174 \ DTCPl456:EVAPControlSystemLeakage (FuelTankSvstem) The fuel system is designedto allow specified maximum vacuum and pressureconditions.Do not deviatefrom the vacuum and pressuretests as indicatedin these procedures.Excessivepressure/ vacuum would damagethe EVAPcomponentsor cause eventualfuel tank failure. EVAP Canister Purge Valve Test 3. Disconnectthe vacuum hose from the EVAP canisterpurge valve (A),and connecta vacuum oumo to the hose. Special Tools Required Vacuum Pump/Gauge,0-30 in. Hg A973X-041-XXXXX This is a two-trip code. Oncecleared,it cannot be reproducedin one trip. Also, cenain specificdriving and ambientconditionsmust occur beforethe ECMwill completethe systemchecks.Additionaltest drives may still not meet the specificconditionsneededto reproducethe code. A973X-041-XXXXX T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . Follow thesetroubleshootingprocedurescarefullyto ensurethe integrityof the system and to confirm the causeof the problemor code. 5 . Apply vacuum to the hose. Does the valve hold vacuum? NOTE:Freshfuel has a highervolatilitythat creates greaterpressure/vacuum. The optimum condltlonfor testing is fresh fuel, and must be lessthan a full tank. lf possible,to assistin leakdetection,add 1 gallon of fresh fuel to the tank (as long as it will not fill the tank). just beforestartingthese procedures. YES-The EVAPcanisterpurge valve is OK. Go to s t e p1 1 . NO-Go to step 6. Turn the ignition switch OFF. Fuel Fill Cap Check 1. Checkthe fuel fill cap (the cap must say "lf not tightened3 clickscheckengine light may come o n ") . 7 . Disconnectthe EVAPcanisterpurge valve 2P connecror. ls the proper luel till cap installed and properly tightened? YES Go to step 2. NO- Replaceor tightenthe cap.I 2. Checkthe fuel fill cap seal. ls the tuel fill cap seal missing or damaged? YES- Replace t h e f u e lf i l l c a p . I N O T h e f u e l f i l lc a p i s O K .G o t o s t e p3 . {cont'd) 11-175 EVAPSystem DTCTroubleshooting(cont'd) 8. Checkfor continuitybetweenEVAPcanisterpurge valve2Pconnenctor terminalNo.2 andbody grouno. EVAP CANISTERPURGE VALVE 2P CONNECTOR EVAP Bypass Solenoid Valve Test 11, Disconnectboth vacuum hosesfrom the EVAPtwo way valve (A),and connecta vacuum pump to the canisterport on the EVAPtwo way valve. F- A973X-041-XXXXX Wire side of femaleterminals ls therecontinuity? YES Goto step9. NO Replace the EVAPcanisterpurgevalve.l B (24P). ECMconnector 9 . Disconnect 1 0 . Checkfor continuitybetweenEVAPcanisterpurge terminalNo.2 andbodyground. valve2Pconnector EVAPCANISTERPURGE VALVE2PCONNECTOR Turn the EVAPbypasssolenoidvalve on with the Honda PGM Tester,or connectECMconnecter terminal E20to body ground with a jumper wire. E 131P) ECMCONNECTOR 1 2 3 4 5 6 1 7 l1 8 9 4 5 6 / 118 2C21 2 2 t 2 ? 24 z7l./29 2WBS (BLU/RED} JUMPER WIRE 1 2 PCS {YEL/BLU) Wiresideof femaleterminals '.\' 1 3 .Turn the ignitionswitch ON (ll). Wire side of femaleterminals 1 4 .Apply vacuum to the hose. Does the valve hold vacuum? ls there continuity? Y E S - G o t o s t e p1 5 , YES Repairshort in the wire betweenthe EVAP canistep r u r g ev a l v ea n dt h e E C I \ {48 2 1 ) . 1 NO Updatethe ECM if it does not have the latest software,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe originaE l CM.I 11-176 NO Go to step 20. v 1 5 . Turn the ignition switch OFF. to. Disconnectthe EVAPbypasssolenoidvalve 2P connecror. '19. Measurevoltage betweenEVAPbypasssolenoid valve 2P connectorterminal No. 1 and body ground. EVAPBYPASSSOLENOID VALVE2PCONNECTOR 1 7 . Checkfor continuitybetweenEVAPbypass solenoidvalve 2P connectorterminal No. 2 and body ground. EVAP BYPASSSOLENOID VALVE 2P CONNECTOR 2 tG'l {BLK/ORN) Wire side ol lemale terminals Wire side oI Iemaleterminals ls there continuity? YES Go to step 18. NO-Repair open in the wire bet\iveen the EVAP bypasssolenoidvalve and the ECM (E20).1 '18.T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . ls there battery voltage? YES Replacethe EVAPtwo way/bypasssolenoid v a l v e( A ) . 1 NO-Repair open in the wire betweenthe EVAP bypasssolenoidvalve and the No. 4 ACG (10A) fuse.l {cont'd) 11-177 EVAPSystem (cont'dl DTCTroubleshooting 2 0 . P l u gt h e f u e l t a n kp o r t ( A )o f t h e E V A P t w o w a y valve, EVAP Canister Vent Shut Valve Test 22. Disconnectthe vacuum hosefrom the EVAP canistervent filter (A),and connecta vacuum pump to the hose. While monitoring FTPsensorvoltagewith the HondaPGM Tester,or measuringthe voltage b e t w e e nE C Mc o n n e c t otre r m i n a l sE 4a n d E1 4 , slowly pump the vacuum pump until the voitage droDSto about 1.5volts. ECMCONNECTOR E {31PI T u r nt h e i g n i t l o ns w i t c hO N ( l l ) . Apply vacuum to the hosewith five strokesof the pump. Does the valve hold vacuum? \ YES Go to step 25. NO The EVAPcanistervent shut valve is OK. Go to step 30. 25. T u r nt h e i g n i t i o ns w i t c hO F F . 26. Disconnectthe EVAPcanistervent shut valve 2P Wiresideof femaleterminals Does the voltagedtop to 1.5 V and hold fot at Ieast 20 seconds? YES-The EVAPbypasssolenoidvalve/EVAPtwo way valve is OK. Go to step 22. conneclor. 2 1 . Checkfor continuitybetweenEVAPcanistervent s h u tv a l v e2 Pc o n n e c t otre r m i n a lN o . 2 a n d b o d y ground. EVAPCANISTEBVENTSHUT VALVE2PCONNECTOR N O R e p a i rt h e l e a kf r o m t h e E V A Pb y p a s s solenoidvalve, EVAPtwo way valve.or F T Ps e n s o r . l {LTGRN/REOI W i r es i d eo f f e m a l et e r m i n a l s 11-178 VacuumHosesand ConnectionsTest 3 0 . Do the fuel tank vapor control valve test (seepage 11 - 1 8 7 ) . ls the fuel tank vapot control valve OK? Y E S - G o t o s t e p3 1 . NO Replace t h e f u e l t a n kv a p o rc o n t r o lv a l v e . l 5 t . Tightenthe fuel cap 3 "clicks", then monitorthe FTPsensor readingswith the Honda PGM Tester. Startthe engine.and let it idle for 5 minutes. ls thete continuity? Checkthe FTPsensor readings. YES-Go to step 28. NO-Replace the EVAPcanistervent shut valve (A) a n d o - r i n g( B ) . 1 28. DisconnectECMconnectorE (31P). 29. Checkfor continuitybetweenEVAPcanistervent s o l e n o i dv a l v e2 P c o n n e c t otre r m i n a lN o . 2 a n d body ground. EVAPCANISTERVENTSHUT VALVE2PCONNECTOR ls the reading above 0.5 kpa (4 mm Hg, 0.16 in. Hg) pressure, or about 3 V? Wire side o{ femaleterminals YES Updatethe ECM if it does not have the latest software,or substitutea known-goodECM,then recheck{seepage 11-6).lf the symptom/indication goes away with a known-goodECfvl,replacethe originaE l CM.t NO Checkthe following partsfor leaks:l ls there continuity? YES-Repair short in the wire betweenthe EVAP c a n i s t e vr e n ts h u tv a l v ea n dt h e E C M( E 2 1 ) . 1 NO Updatethe ECM if it does not have the latest soflware,or substitutea known-goodECM,then recheck(seepage 11-6).lf the symptom/indication goes away with a known-goodECM,replacethe o r i g i n aE l CM.I . . . . . . . . . F u e l t a n k( A ) F u e lf i l l c a p ( B ) F u e lf i l l p i p e ( C ) F u e l t a n kv a p o rc o n t r o lv a l v e ( D ) F u e l t a n kv a p o rr e c i r c u l a t i ovna l v e( E ) F u e l t a n kv a p o rr e c i r c u l a t i otnu b e ( F ) F u e l t a n kv a p o rs i g n a l t u b e( G ) F u e l t a n kv a p o rc o n t r o lv e n t t u b e ( H ) FTPsensor(J) - R e p a i ro r r e p l a c ea n y l e a k i n gp a r t s . 11-179 EVAPSystem DTCTroubleshooting(cont'd) DTCPl457:EVAPControlSystemLeakage (EVAPCanisterSystem) 2. Turn the EVAPcanisterpurge valve on with the HondaPGM Tester,or connectECMconnector terminal 821 to body ground with a jumper wire. The fuel system is designedto allow specified maximum vacuum and pressureconditions.Do not deviatefrom the vacuum and pressuretests as indicatedin these procedures.Excessivepressure/ vacuum would damagethe EVAPcomponentsor causeeventualfuel tank systemfailure. ECMCONNECTOR A I24P' SpecialToolsRequired Vacuum pump/gauge,0-30 in.HgA973X-041-XXXXX W i r e s i d eo f l e m a l et e r m i n a l s This is a two-trip code.Once cleared,it cannot be reproducedin one trip. Also, certainspecificdriving and ambientconditionsmust occur beforethe ECfMwill completethe system checks,Additionaltest drives may still not meet the specificconditionsneededto 16^r^.1' '^6 rh6 Turn the ignition switch ON (ll). 4 . Apply vacuum to the hose. ^^.16 Does the valve hold vacuum? Followthesetroubleshootingprocedurescarefullyto ensurethe integrityof the system and to confirm the causeof the problem or code. NOTE:Freshfuel has a highervolatilitylhat creates greaterpressure/vacuum. The optimum conditionfor testing is fresh fuel, and there must be lessthan a full tank. lf possible,to assistin leakdetection,add I gallon of fresh fuel to the tank (as long as it will not fill the tank),just beforestartingthese procedures. YES-Go to step 5. NO-The EVAPcanisterpurge valve is OK. Go to step 10. Turn the ignition switch OFF. b. Disconnectthe EVAPcanisterpurge valve 2P conneclor, 7 . Checkfor continuitybetweenEVAPcanisterpurge valve 2P connectorterminal No. 2 and body ground. EVAPCanister Purge Valve Test 1. Disconnectthe vacuum hose from the EVAP canisterpurge valve (A),and connecta vacuum pump to the hose. EVAPCANISTEN PURG€ VALVE2PCONNECTOR -4l-fircs ll2l IYEL/8Lu) (f]) I W i r e s i d eo f f e m a l e l e r m i n a l s ls therecontinuity? YES-Goto step8. 4973X-041-XXXXX NO Repairopenin thewire betweenthe EVAP 821).I c a n i s t epru r g ev a l v ea n dt h eE C M / P C(M 8 . T u r nt h ei g n i t i o n s w i t c hO N( l l ) . 11-180 t voltagebetweenEVAPcanisterpurge 9. Measure terminalNo. 1 andbodyground. valve2Pconnector EVAPCANISTERPURGE VALVE2PCONNECTOR EVAP Bypass Solenoid Valve Test 10. Disconnectboth vacuum hosesfrom the EVAPtwo way valve {A),and connecta vacuum pump to the canisterport on the two way valve. Wire side oI lemaleterminals ls thetebatteryvoltage? the EVAPcanisterpurgevalve.l YES- Replace NO Repairopenin thewire betweenthe EVAP canisterpurgevalveandthe No.4 ACG(10A) fuse.I 1 1 .T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . 'It Apply vacuum to the hose. Does the valve hold vacuum? YES The EVAPtwo way/bypasssolenoid valveis O K . G o t o s t e p1 8 . N O - G o t o s t e p1 3 . Turn the ignition switch OFF. 1 4 . Disconnectthe EVAPbypasssolenoidvalve 2P connector. Checkfor continuitybetweenEVAPbypass s o l e n o i dv a l v e2 P c o n n e c t otre r m i n a lN o . 2 a n d b o d yg r o u n d . EVAPBYPASSSOLENOID VALVE2P CONNECTOR Wire sideof female terminals (cont'd) 11-181 EVAPSystem DTCTroubleshooting(cont'd) EVAP Canisler Vent Shut Valve Test 18. Disconnectthe vacuum hosefrom the EVAP canistervent filter (A),and connecta vacuum pump to the hose. ls there continuity? YES Go to step 16. NO- Replacethe EVAPtwo waylbypasssolenoid valve (A).1 DisconnectECMconnectorE {31P). to. 't7. Checkfor continuitybetweenEVAPbypass solenoidvalve 2P connectorterminal No. 2 and body ground. EVAPBYPASSSOLENOID VALVE2P CONNECTOR \ , lI l tl - 2l l 19. Turn the EVAPcanistervent shut valve on with the HondaPGM Tester,or connectECMconnector terminal E21to body ground with a jumper wire. ECMCONNECTOR E (3TP) 1 1 2 1 34 5 1/ 1 5tal/la z3lz4 zil./ 2WBS JUMPER WIRE -[BLU/REo) ()) I 8 9 vsv( {LTGBN/RED) 2A21 m 31 Wiresideol lemaleterminals Wire side of femaleterminals 20. Turn the ignitionswitch ON (ll) ls there continuity? 2 1 .Apply vacuum to the hose. YES Repairthe short in the wire betweenthe EVAPbypasssolenoidvalve and the ECM{E20).f NO Updatethe ECI\4if it does not havethe latest software.or substitutea known-goodEClvl,then recheck(seepage 11-6).lf the symptom/indlcation goes away with a known-goodECM,replacethe o r i g i n aE l CM.I Does the valve hold vacuum? YES-The EVAPcanistervent shut valve is OK. Go to step 27. NO Go to step 22. 2 2 . Turn the ignitionswitch OFF. 2 3 . Disconnectthe EVAPcanistervent shut valve 2P connector. 11-182 24. Checkfor continuitybetweenEVAPcanistervent Nlo . 2 a n d b o d y s h u t v a l v e2 P c o n n e c t o r t e r m i n a ground. VATVE2P CONNECTOR -4l-T_*u r 2l Canister System Leak Test 27. Turn the ignition switch oFF. 2 8 , C o n n e c t t w ot,h r e e - w a yT - f i t t i n g s( A )i n t o t h e h o s e from the EVAPcanisterto the EVAPtwo way valve. Connectthe FTPsensorto one of the T-fittingsand t h e v a c u u mp u m p t o t h e o t h e l ILTGFN/REDI @ wn€ s de ol l€ma1e terminals ls therc continuity? YES Go to step 25. NO Repairopen in the wire betweenthe EVAP c a n i s t e vr e n ts h u tv a l v ea n dt h e E C I V(IE 2 1 ) . 1 25. T u r nt h e i g n i t i o ns w i t c ho N ( l l ) . 26. Measurevoltage betweenEVAPcanistervent shut v a l v e2 P c o n n e c t otre r m i n a lN o . 1 a n d b o d yg r o u n d . VENTSHUT EVAPCANISTER VALVE2PCONNECTOR 29. Removethe vent hosefrom the EVAPcanistervent shut valve (A),and cap the port (B)to sealthe fresh air vent of the EVAPcanister. Wlreside oflem. € rerm na s 3 0 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . ls there battery voltage? YES Replacethe EVAPcanistervent shut valve ( A )a n d t h e o - r i n g( B ) . I NO Repairopen in the wire betweenthe EVAP c a n i s t e vr e n ts h u tv a l v ea n dt h e N o . 4 A C G ( 1 0 A ) fuse.I (cont'd) 11-183 EVAPSystem I DTCTroubleshooting(cont'dl 31. While monitoring FTPsensorvoltagewith the Honda PGM Tester,or measuringvoltage between ECMconnectorterminalsE4 and E14,slowly pump the vacuum oumD. ECMCONNECTOR E 13lPI Wire side ot femaleterminals 37. While monitoringFTPsensorvoltagewith the Honda PGM Tester,or measuringvoltage between E C Mc o n n e c t otre r m i n a l sE 4a n d E1 4 ,s l o w l yp u m p t h e v a c u u mp u m p . ECMCONNECTOR E {31PI Wiresideof lemaleterminals 32. Continueto pump vacuum until the voltagedrops to about 1.5V. Make sure the enginecoolant temperatureis still above 95'F 135.C)and your v a c u u mp u m p h a s n o l e a k . 38. Continueto pump vacuum until the voltagedrops 33. Monitor the voltagefor 20 seconds. 39. Monitor the voltagefor 20 seconds Does the voltage drop 1.5V and hold for at least 20 seconds? YES Inspectthe EVAPcanistervent shut valve l i n ea n d c o n n e c t i o n s . l to about 1.5V.Make sure the enginecoolant temperatureis still above95"F (35"C)and your vacuum pump has no leak. Does the voltage hold for at least 20 seconds? YES Inspeclthe fuel tank vapor control lineand connections.I NO Go to step 40. NO-Go to step 34. 40. T u r nt h e i g n i t i o ns w i t c hO F F . 34. Turn the ignition switch OFF. 35. Disconnectthe quick-connectfitting (A) fromthe EVAPcanister,and plug the canisterport {B). 3 6 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . 11-184 4 1 .Disconnectthe purge line hose {A) from the c a n i s t e ar t t h e m e t a ll i n e a n d p l u gt h e h o s e( B ) . 4 2 . T u r nt h e i g n i t i o ns w i t c hO N ( l l ) . 43. While monitoringFTPsensorvoltagewith the Honda PGM Tester,or measuringvoltage between ECMconnectorterminalsE4 and E14,slowly pump t h e v a c u u mp u m p . E {31P) ECMCONNECTOR Wiresideof femaleterminals 4 4 . Continueto pump vacuum until the voltagedrops to about 1.5V.Make sure the enginecoolant temperatureis still above 95'F (35'C)and your v a c u u mp u m p h a sn o l e a k . 45. Monitor the voltagecontinuouslyfor 20 seconds. Does the voltage drop to 1.5 V and hold f or at least 20 seconds? YES Inspectthe EVAPcanisterpurge valve line and connections.lf they are OK, perform the EVAP two way valvetest (seepage 11-186)and the fuel tank vapor controlvalve test (seepage 1'l-187)l NO-Replace the EVAP canister ( s e ep a g e1 1 - 1 8 9 ) . 1 11-185 EVAPSystem EVAPTwo Way ValveTest Special Tools Required . V a c u u mp u m p / G a u g e , 0 - 3 0i n . H g A973X-041-XXXXX . Vacuum/Pressure cauge.0-4 in. Hg 07JAZ-0010008 4. Move the vacuum pump hosefrom the vacuum fitting to the pressurefitting,and move the vacuum gauge hosefrom the vacuum side to the pressure side (A) as shown. 1 . R e m o v et h e f u e l f i l l c a p . 2. Disconnectthe vapor line from the EVAPtwo way valve (A).Connectit to a T-fitting(B)from the v a c u u mg a u g ea n d t h e v a c u u mp u m p a s s h o w n , 07JAZ-0010008 Slowly pressurizethe vapor line while watchingthe gauge.The pressureshould stabilizemomentarilV a b o v e1 . 0k P a( 8 m m H g ,0 . 3i n . H g ) . Apply vacuum slowly and continuouslywhile watchingthe gauge.The vacuum should stabilize m o m e n t a r i l ya t 0 . 8 2 . 1 k P a( 6 1 6 m m H g , 0 , 2 0 . 6i n . H g ) . lf the vacuum stabilizes{valveopens)below 0.8 kpa ( 6 m m H g , 0 . 2i n . H g )o r a b o v e2 . 1k P a( 1 6m m H g , 0.6 in.Hg),installa new valve and retest. 11-186 . lfthe pressuremomentarilystabilizes(valve o p e n s )a b o v e1 . 0k P a( 8 m m H g , 0 . 3i n . H g )t,h e v a l v ei s O K . . lf the pressurestabilizesbelow 1.0 kPa(8 mmHg, 0.3 in.Hg),installa new valve and retest. FuelTankVaporControlValveTest SpecialToolsRequired 0-30 in. HgA973X-041-XXXXX VacuumPump/Gauge, FloatTest 1 . M a k es u r et h e f u e lt a n ki s l e s st h a n h a l ff u l l . ValveTest 1 . N 4 a kseu r et h e f u e lt a n ki s l e s st h a n h a l ff u l l 2 . R e m o v et h e f u e l f i l l c a p . 3. Disconnectthe fuel tank vapor signaltube (A). 2. Removethe fuel fill cap to relievefuel tank pressure,then reinstallthe cap. 3. Disconnectthe fuel tank vapor recirculationtube t v a c u u mP u m Pt o i t . { A ) ,a n d c o n n e c a 4 . Disconnectthe vacuum hoses(A) from the EVAP canister(B),then plug the ports with plugs (C) A973X-041-XXXXX P l u gt h e l i n e( B ) . 5 . Apply vacuum to the fuel tank vapor recirculation tuDe. lf the vacuum holds, replacethe fuel tank vapor c o n t r o lv a l v e( s e ep a g e1 1 - 1 8 9 ) . lf the vacuum does not hold, the float is OK. Do the valve test. A973X-O41-XXXXX 5. Disconnectthe vacuum hose (D)from the EVAP canistervent shut valve (E),and connecta vacuum pump to the vacuum hose. 6 . P u m pt h e v a c u u mp u m p 8 0 t i m e s . . l f t h e v a c u u mh o l d s ,g o t o s t e P7 . . l f t h e v a c u u md o e sn o 1h o l d ,g o t o s t e p 1 0 . (cont'd) 11-187 EVAPSystem FuelTankVaporControlValveTest (cont'd) 7. Connecta secondvacuum pump to the fuel tank v a p o rs i g n a l t u b e( A ) . Fill the fuel tank with fuel, then checkfor fuel in the EVAPtwo way valve (A),and fuel tank vapor recirculationhose (B). NOTE:At either location,tiny dropletsof fuel are normal. . lf fuel runs out of th e hosesat either location, replacethe fuel tank vapor control valve. . l f t h e f u e l d o e sn o t r u n o u t o f t h e h o s e s t, h e f u e l tank vapor systemfunction is normal. 8. Apply vacuum (1 pump) to the fuel tank vapor signaltube (A).then checkthe vacuum on the pump in step 6. . lf the vacuum holds,replacethe fueltank vapor c o n t r o lv a l v e{ s e ep a g e1 1 - 1 8 9 ) . . If the vacuum is released,goto step 9. Checkfor fuel rirnningout. Checkfor fuel runningout. 1 0 .Disconnectthe fuel tank vapor quickdisconnect from the EVAPcanister,then plug lhe port on the canister.Reapplyvacuum (80 pumps). . lf the vacuum holds,replacethe fuel tank control v a l v e( s e ep a g e11 - 1 8 9 ) . . lf the vacuum does not hold, insDectthe EVAP canistervent shut valve o-ring.lf the o-ring is OK, replacethe EVAPcanister,and repeatstep 4. 11-188 EVAPCanisterReplacement FuelTankVapor ControlValve Replacement l. Removethe vacuum hoses(A). 1 . R e m o v et h e f u e lt a n k ( s e e p a g e l l - 1 5 5 ) . 2 . R e m o v et h e f u e l t a n kv a p o rc o n t r o lv a l v e ( A )f r o m t h e f u e lt a n k( B ) . 2. Removethe boit (B). 3. Removethe EVAPcanister(C). 3 . Installthe fuel tank vapor control valve. 4. Installin the reverseorder of removal. 'l 4 , Installthe fuel tank (seepage 1 -155). 11-189