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Download Service Manual Emission Control System 1972 models revised
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I EMISSION CONTROL SYSTEM FOR 1972 YEAR MODELS REVISED EDITION I NISSAN I NISSAN MOTOR CO TOKYO LTD EMISSION QUICK REFERENCE INDEX CONTROL SYSTEMS A 12 ENGINE A 12 l16 E N GIN E l16 l24 ENGINE l24 SERVICE EQUIPMENT SE SERVICE MANUAL i I NISSAN I i J NISSAN MOTOR CO TOKYO JAPAN LTD FOREWORD r I ThIS of our vehIcle servIce manual has been dIstnbutors and dealers s prepared for the purpose of provldmg m assistmg the service personnel effective service and maintenance of all Datsun Emission Control Systems Since proper mamtenance and AIr Pollution CalIforma serVIce are most essentIal Control Standards by condItIOn tlus manual should be carefully to satisfy the Federal and keeping vehicles m the best possIble followmg matters should be noted studIed The for effectIve utihzation of thIS manual I Also refer to the followmg SERVICE MANUALS for complete detaIls of the engmes because thIs manual gIves mformatIOn concernmg the EmISsIOn Control System only AIO and AI2 ENGINE Ll3 Ll6 and L20 ENGINE L20A and L24 ENGINE 2 All part names the genume 3 All mformatIOn the latest 4 m lISted in thIS PARTS CATALOG must be used for m this manual mformatlon available at the time of pubhcatlon only replacement are based on approval emphasIZed accordmg CATIONS parts IllustratIons and specIficatIons contamed product It should be contents this manual conform to PARTS CATALOG of each vehIcle and servIce ISSUed that those who use thIS manual are responsIble for revISmg the to the SERVICE JOURNAL and SERVICE DATA AND SPECIFI by the factory WhICh carry the latest factory approved servIcmg methods 5 Rights for alteration of specifIcations and methods at any time are reserved I NISSAN MOTOR TOKYO CO LTD JAPAN J @ 1971 NlSSAN MOTOR CO LTD Pnnted m Jolpdn SERVICE MA NUA l t SECTION A 12 i tj it EMISSION CONTROL A12 ENGINE SYSTEM If GENERAL DESCRIPTION EC CRANKCASE EMISSION CONTROL SYSTEM EC 3 EXHAUST EMISSION CONTROL SYSTEM EC EVAPORATIVE EMISSION CONTROL SYSTEM EC 11 MAINTENANCE AND TESTING EC 12 I ADJUSTING IGNITION TIMING ENGINE IDLING SPEED AND GAS MIXTURE TROUBLE DIAGNOSES AND CORRECTIONS NISSAN I NISSAN MOTOR CO TOKYO LTD JAPAN 3 4 EC 21 Ie 22 EMISSION CONTROL SYSTEM A12 ENGINE f EC l F FrontsuJe external VieW 4 view f EC 2 Rear suJe external F EC 2 EMISSION CONTROL SYSTEM GENERAL DESCRIPTION There are system These three types of control control emIssIon system 2 Exhaust EvaporatIve mtervals to reduce harmful control emISSIon to system are Crankcase 3 emISSIon control system Periodic mspectlon and emISSIOns a mlmmum requued serviCIng of these systems should be the recommended carned out at CRANKCASE EMISSION CONTROL SYSTEM DESCRIPTION ThiS system returns blow both the mtake retor by gas to mal1lfold and carbu cleaner aIr The venttlatlon control valve vIded to gas to partIal engme blow by IS pro conduct crankcase blow by the mtake throttle mal1lfold operation DUring of the the mtake mamfold sucks the gas through the valve Nor mally the capacIty of valve the suffiCIent to handle any blow by small amount of au ventllatmg au IS ventllatmg mal1lfold vacuum IS a draw blow flow The valve and IS then drawn from the retor aIr and ItS tlon the tube connectmg carbu cleaner to rocker cover mto carburetor the msufficlent flow goes m through through to the the the reverse dlrec In vehicles With mgh blow by through the the crankcase Under full throttle condItion by tube connectIon clean SIde of the carburetor au cleaner through the an excessIVely of the flow wtll go tube connectIOn to the some aIr cleaner under all opera tmg condItIOns If 0 Fresh aIr Blow 1m by AIr used gas In fIltering 011 ECOOl I EC 3 FI EC 3 Crankcase emISSIOn control system at parltally throttle open u EMISSION CONTROL SYSTEM J Fresh aIr Blow by gas AIr used In flltenng 011 EC002 FIlJ EC 4 Crankcase emission control system at full throttle open EXHAUST EMISSION CONTROL SYSTEM CONTENTS DESCRIPTION ECA TRANSM 1551 ON CONTROLLED VACUUM ADVANCE Operation CLEANER ELECTRIC AUTOMATIC CHOKE 3 DESCRIPTION au The 1972 model Al2 engIne em EngIne ModIficatIOn Sys tem consisting essentIally of the fol lowmg umts ploys I the Combustion chambers ModIfIed configuration 2 TransmIssIOn controlled advance model only for Manual vacuum TransmiSSion 4 EC 9 EC 9 Fast Idle earn ECA Fast Idle adjusting EC 5 Un loader EC 9 Vacuum EC 9 AUTOMATIC TEMPERATURE CONTROL AIR BI metal and heater EC 9 screw diaphragm EC 6 BI metal Index mark EC 9 EC 8 THROTTLE OPENER EC 9 Automatic temperature control cleaner advance 4th Leaner carburetor with an electnc top tlmmg other 5 bustIOn This system provides 4 EC the vacuum no posItIons This TRANSMISSION CONTROLLED VACUUM ADVANCE when the gear posItion wIth automatIc choke Throttle opener only vacuum system IS m and retarded vacuum for however advance dunng spark advance complete the at com allows the warmlng penod of engmL In cold weather and provIdes satisfactory dnvmg pe formance Immediately after startmg up the engme EMISSION CONTROL SYSTEM Note Gear Vacuum advance ImmedzateIy engme advance R No 1st No 2nd No 3rd No 4th YES m IS after startmg the cold weather allowed for vacuum all gear posltJons Operation 19m1Jon sWItch Allerna lor Auto choke relay T I I Temperature 1 sensmg sWitch 500F Above ON SolenOid valve Carburetor vacuum Dtstnbutor vacuum t Au cleaner advance umt SolenOid valve EC003 Fig When electnc current flows the Vacuum OFF Vacuum emitted mto atmosphere dctuated EC 5 SchematIc drawmg of control system for A 12 engme through needle the solenOid valve ON valve au opens and Introduces air from the cleaner mto the vacuum advance urut of the dlstnbutor the vacuum through hose and the vacuum advance nated the deenergzzed and the retor vacuum provide The needle created umt elnru IS closes valve the carbu by mto the vacuum mtroduced IS advance IS solenoId valve the When of the wstnbutor to usual vacuum advance gear transmISSIOn sWItch case located operates on so as the to mterrupt the flow of electnc current when the gear IS placed Into Top but allows It to flow In other gear Fig EC 6 Gear sWItch mstallatlOn posItIons EC 5 EMISSION CONTROL SYSTEM A VIew EC004 Fill EC 7 Temperature sensmg sWitch mstallatlon The temperature sensmg swItch IS on the dash sIde panel RH screwed The bl metal located ture sensmg sWItch m the prevents ECOO5 I Flow gUide valve tempera 2 Onfice the flow 3 To dlstnbulor SolenOid valve assembly of electnc current when the tempera ture IS below SOoF and thus ensures a runnIng proper mediately after startmg the engme um and hose tee passmg freely hose IS employed m the vacu connectmg the carburetor to the restnct the au flow carburetor when mtroduced through the EC 8 Vacuum tube diagram m cold weather An onfice Fill un performance by au AUTOMATIC TEMPERATURE CONTROL AIR CLEANER aIr cleaner eqUIpped and vacuum vacuum valve IS IS sensor of IS With a a specIal temperature operated actmg on the the controlled by See EC 9 FIgure valve au type sensor The control temperature vacuum The automatic temperature control o o I I V I Au mlet pipe 2 Vacuum molor assembly 3 Temperature 4 Hot sensor assembly au pIpe S Au control valve E C006 Fill EC 6 EC 9 AutomatIC temperature control air cleaner EMISSION CONTROL SYSTEM If the temperature of suction low when the engme IS runnmg au IS the valve closes the underhood and mtroduces hot alf mlet 31r through cover the wluch IllstalIed IS mamfold See FIgure on the exhaust EC 10 3 To manifold I Air mlet pipe 2 Air 3 Diaphragm Diaphragm 4 5 f t Hol 6 7 7 EC007 S all control valve spnng Vacuum hoses Air bleed valve closed Hot air pipe Temperature assembly sensor FlEC I0 Hot a1rdellUery mode DUring cold engme operation When au or the the temperature of suctiOn around the sensor reaches llOoF above the valve actuates to open the temperature of sensor When suctiOn aIr around the nses and valve completely sensor reaches above opens to further entrance of hot l200F the hood prevent the the carburetor alf and allows under alf alone to be mtroduced mto See FIgure EC II I I IJ 1 Underhood 2 alr 3 4 FlEC 11 EC 7 Underhood alr EC008 dellUery Diaphragm spnng Diaphragm 6 Vacuum hoses Air bleed valve fully 7 open Hot air pIpe 5 7 Air mlet pipe Air control valve 8 Temperalure assembly senSOr mode DurIng hot engme operation EMISSION CONTROL SYSTEM The acts valve descnbed au suctIon always kept Figure EC 12 sensor manner the and prevIOusly perature of the m See tem IS at about 1100 F the around I I Underhood alr I Air mlet pIpe 2 Air control valve 3 4 DIaphragm DIaphragm 5 Vacuum hoses 6 Air spnng bleed valve partIally open tt the under heavy opens obtam the underhood full power tempelatule around This the control duced operatmg IS engme load valve fully mIet au regardless of the carburetor and than also conventIonal elumnates An electnc heater mterconnected metal wanns to the J TQ r 1 Ll 1 f V a 011 the posItIOn throttle the elapse valve of m of hme up condItIon of engme are as I t I l 1 t ts br f 1 C dellUery mode constructIon and functIon of 1 I C i krJi air sensor choke t l ifj I warm pIpe I 1ritf GJ air each part of thiS carburetor follows See Figure EC 14 bI a the The li t and accordance wIth or au Regulatmg valve choke ELECTRIC AUTOMATIC CHOKE temperatures allows leaner carburetor cahbrallon With accompanymg re Temperature assembly and controls valve car buretor Icmg to sensor of Fig EC 12 effilSSlOns controls Hot 8 E C009 alr Hot When 7 v i A rl X 7 J BIIO eqUIpped WIth AfT BIIO eqUipped WIth MfT Fig EC 13 EC S EMISSION CONTROL SYSTEM 1 Bl metal 2 Heater 3 BI metal cover 4 Fast Idle earn 5 BI metal 6 BI metal mdex mark 7 Choke shaft lever 8 Choke valve 9 Unloader tongue 10 Vacuum dlaphrdgm EC010 11 Throttle valve 12 Fast Idle adJustmg screw f EC 14 ConstructIOn of electrIC automatIc choke Fl Electnc current flows See bl metal Figure deflectIon of bi metal to the choke valve extent the through heater as the engme starts and warms EC 5 The is the choke The t earn fast Idle cam of throttle opemng certaIn a an adequate Vacuum diaphragm to start by crankmg tlus ready diaphragm valve so as to obtam proper amount of mIXture cor respondmg to the opemng of the choke valve wluch depends upon the warmed up condItIon of the engme settmg the moment the IS of the bl metal controls reqUIred for startmg the engme mlXlllg ratIo operatIOn the mamfold upon ThIS screw adJusts the opemng of the throttle valve offast Idle cam IS The functIon ofthe throttle opener to open the throttle valve of carbu sltghtly m vehicle coastmg con ditIon Dunng deceleratIon manIfold ber When dunng before the acceleratmg the wann up penod the suffiCiently choke open ture m quantIty of mIX the engIne IS not suffiCIent so that normal vacuum valve vehIcle that does is not thiS unloader makes a contInue nses and burned HC IS and a combustIOn a great can amount of not un emItted The carburetor EC 9 vacuum throttle schematIc Increases deceleratIon to the the and carburetor servo as oc the control opens speed diaphragm throttle valve slIghtly cham of the As the decreases the mamfold lowers to the value The control valve predetermmed begms to close gradually keepmg the mamfold vacu um at the predetermIned constant value As retor Unloader A opens to transfer the mamfold vacuum vehIcle THROTTLE OPENER screw the of follows as draWIng of the system IS shown ill FIgure EC 15 At the moment when vacuum Fast idle adjusting IS opener valve used for whIch The curs Bi metal index mark The bl metal Index mark emISSIOn IS necessary amount of au fuel mIxture determmes the eqUIpped WIth the throttle opener supplIes the engme WIth an adequate charge ofcombustIble mIXture to keep proper combustIOn dunng decelera tIon resultmg m remarkable reductIOn of HC The moment when engIne forces open choke valve to the pre determmed extent so as to proVide valve lever Fast idle obtaIn to as so to open fuel mIXture aIr transmItted through choke valve the Bi metal and heater a result both low HC emISSIon and normal engIne brake celeratIon are obtamed dunng de The altItude corrector WIth the IS proVIded to preload compensate slIght vanatIon of the atmosphenc pres a sure 1 EMISSION CONTROL SYSTEM 1 Valve 2 DllIphragm 3 4 AltItude corrector Vacuum adJustmg screw 5 Filter 6 Mamfo1d 7 AdJustmg screw Primary throttle valve 8 vacuum tube ECOll FW EC 15 Throttle opener control system DISTRIBUTOR ADVANCE CHARACTERISTICS 20 Sl 20 Sl 15 2100 x 13 5 15 Former models e u 10 0412 80 M n I 1 63 0412 5 o 0 NT 5 0 10 15 Destrlbutor rpm 20 x 25 4 6 102 8 10 12 Vacuum 20 14 16 18 20 mHg 20 Sl 15 u u I 15 New 10 I models From December 1971 productIOn 0 5 0 Model No unchanged 5 0 15 DIstribUtor rpm 20 x 25 4 102 6 18 Vacuum mHg 20 EC012 FW EC 16 D stnbutor advance characterIStics EC10 EMISSION CONTROL SYSTEM EVAPORATIVE EMISSION CONTROL SYSTEM CONTENTS preventmg OESCRI PTION escapmg ThIS system consIsts of four basIc elements IndIcated below Fuel tank wIth posItive sealIng filler cap 2 Vapor hquld separator 3 Vapor vent lme Flow gUide valve 4 Flow flow gUide by valve prevents valve gUide gas and and operates gasohne vapor flow as 2 valve sucked bustion When the engme IS not runnmg the vapor vent lme vapor hquld separator becomes tank filled WIth the gas pressure The gas IS gasohne the sealed type fuel produced A flow gUide In valve opens when above 0 4 passed through Into When crankcase mamfold for the pressure of tank vapor hquld Ime vent vapor negative by decreasmg the flow gUide au IS com the fuel to send fresh air the m the type and separator fuel the m Once the engIne starts the evaporatIng follows are accumulated IS crankcase gas and fuel tank blow by gas from flOWIng mto the fuel tank and gUides fresh aJT Into It the I11to from vapor carburetor aIr sealed vapor The gasohne EC 12 VALVE cleaner blow I FLOW GUIDE EC 11 DESCRIPTION valve from I the opens the carburetor cleaner to the fuel tank l11h the flow Hg gUide POSItIve scaling fIller Cdp Flow gUide valve The valve opens when the pressure IS over 0 4 Inch Hg Crankcase ventilatIOn valve EC013 Po Ee EC 7 Eoopom m o m EMISSION CONTROL SYSTEM FLOW GUIDE VALVE This valve IS engraved the In mounted Marks A compartment body 1t the engme m F and Care of the valve to FRO I IndIcate the wnnectlon of the vapor vent lIne RBURETOR f TO CRANKCASE I I FIlf EC IB Flow guide ualue MAINTENANCE AND TESTING CONTENTS GENERAL MAINTENANCE EC 12 Throttle opener Carburetor EC 12 Transmission Dlstnbutor EC 12 controlled vacuum advance Spark plug High tension Battery EC 12 Automatic temperature control EC 13 air Carburetor cable air CRAN KCASE cleaner element EMISSION EMISSION EC 13 BI metal settmg EVAPORATIVE EC 13 To sIons make sure a emis low level It recommended that Inspection must be conducted every 12 months or IS 12 000 every miles and operatJon obtamed penodlcal mspectJons commended Best mlmmum wtll be emiSSIOns servlcmg engme m are through pomts should and from re at these m dlstnbutor breaker alIgnment for full pomt dwell and Clean and correct grease apply be replaced Justment Breaker at maxmlUm P J ImperatJve for best exhaust yI Refer to the article given Justmg IgmtJon tImIng I re m engme Ad IdlIng 1 EC 20 EC 21 Remove and clean plugs m a sand Inspect spark plug Make sure that they are of the speclfi ed heat range Inspect msulator for cracks and chips Check both center and ground electrodes If they are worn excessIvely replace WIth new Ftle center electrode flat spark plugs blast cleaner o plug u iC each should be adJustmg tool Spark replaced every 2 000 miles lI fl i i control d i r CZJ line valve usmg the proper C adJust gUide vent llquld Set the gap to 00315 to 00355 mch mtervals of 12 000 miles carburetor Idle mIxture ad IS con gap are dlstnbutor to the cam and WICk L Check the choke settIng and to the speclficatJons as reqUIred P correct tact and that CONTROL Spar k plug pomts for abnormal plllmg and wear Replace If necessary Make sure they Carburetor emISSIOn the exhaust tervals Proper flow Distributor that exhaust mamtamed at are fuel tank vapor separator and vapor Checkmg Check EC 20 EMISSION EC20 Checkmg GENERAL MAl NTENANCE EC 19 SYSTEM CONTROL SYSTEM EC 16 Electnc automatic choke EC 13 EXHAUST EC 16 cleaner EC 13 CONTROL SYSTEM EC 13 rA i V 0 OJ Thickness gauge I I c J Dlstnbutor FIlf EC 19 Checkmg dlstrlbutor breaker pomt gap EC12 Fig EC 20 Checkmg spark plug pomt gap 1 EMISSION CONTROL SYSTEM High tension cable Use ohmmeter an resistance on secondary connect cables from remove dlstnbutor cap butor together cables Do not the the between spark plug from with the secondary the ohmmeter tenmnal sIde and the the cap check the cable cable If the resistance only than 30 000 ohms Check hoses resIs IS replace stlll the 2 DISconnect them out wIth hose con CONTROL SYSTEM Throttle opener Before hoses all compressed and blow 3 Test the followmg crankcase observe the air a hlssmg remove when mlet a WIll be heard the valve dnd a finger IS placed If the valve over Test should be vacuum valve solenoid nusslOn controlled AutomatIc model replacement every 30 000 miles adJustmg mg a transmlSSlon with a tachometer vacuum gauge tachometer engIne tester Intake mamfold tensIOn cables 1 Install vacuum and Battery EC014 gauge specIfic graVIty ofelec an accurate hydrometer required to at least flUId up to proper level control m ItS vacant place air auto cleaner connect a tube securely Tube connector attached to mtake mamfold FIg EC 22 Cross sectIOnal vIew of crankcase uenhlahon control ualve 4 Add dlstdled water as bnng the tube of the temperature vacuum IS Measure the be IS screw DIsconnect should advance dash pot does not operate by loosen mattc more trans the and or on IS and 1 220 used vacuum Adjustment trolyte wIth SpecIfic graVIty after conducted Test should be conducted after the Normal control valve CheckIng high Carefully deenerglzed necessary EC 21 open mstructtons Manual transmlSSion model plugged replace WIth a new valve Check for deposIt pluggIng In the hose Clean If Fig automatic vent datIOn should be felt unmedl vacuum valve nOise through passes IS IS IS the method ately penod throttle that the engme fully followmg choke blade the ventilator hose from the crankcase ventilatIOn control valve Ifthe valve IS strong sure accordance wIth the m With engme runmng at Idle as the adJustmg opener make warmed up and that air If any hose can not be free of obstructIOns replace WIth a new one workmg assembly and EXHAUST EMISSION nections for leaks than more the cable from remove more 1 control valve 30 000 ohms tance the on correspondmg electrode mSlde the cap If the resIstance IS and and dlstn cables from remove cable DIs spark plugs Connect cap check to cables CRANKCASE EMISSION CONTROL SYSTEM Crankcase steel net If clogged WIth WIth solvent and dry od WIth slush clean compressed air battery posts and cable ter mmals After tlghtemng the clamps coat the battery posts and clamps wIth hght grease to prevent corrosIOn Clean 1 2 Carburetor element ly aIr cleaner no should be cleanmg replaced IS requued But It manifold f EC 24 Fl The paper element has been special treated VISCOUS type and there fore nLike Fig EC 23 Crankcase steel net m every 24 000 mdes cylmder block EC 13 3 Vacuum g uge Connet tor Vacuum gauge mstallatlOn 2 Connect the uum tube servo directly fold connector WIthout the control valve diaphragm vac to the mtake mam laymg through EMISSION CONTROL SYSTEM 3 WIth negatIve phragm operates the servo the erates the servo dIa and throttle valve mary vacuum pressure the mtake mamfold m thus the pn opened When IS statlOnanly and make sure that speed IS m the prescnbed range correctly nut 4 the engIne vacuum dIaphragm normally op engme speed nses reachmg tube the servo dtaphragm the mtake from mam to the control fold and connect valve Connect the vacuum tube of the It control valve to the mtake mamfold normal plpmg 700 to 1 800 rpm When the engme speed does not reach tlus range turn See adJustmg screw properly Figure EC 25 When the engIne speed IS lower 1 than the presCrIbed range turn the adJustmg screw clockwIse 2 When the engme speed IS lugher than the prescnbed range turn the adJustIng screw counterclockwIse Upon com pie lion of the ad Justment set the adJustmg screw lock DIsconnect The 5 opened by the throttle pnmary valve hnk connected the When the engIne speed IS to It mcreased to IS approXImately 3 000 rpm and lower ed naturally from tlus speed changes m servo dIaphragm hnk stroke mtake marufold vacuum and engIne speed are as AdjustIng shown III FIgure EC 26 2 Lock nut screw Fig EC 25 Seroo diaphragm ad ustlTlg screw g Servo diaphragm hnk stroke E Full gf l o o E l u u E g Intake mamfold vacuum Servo dIaphragm stroke E e 3000 biJ Engme speed w 2000 1000 TIme Fig EC 26 Changes As tIve the engIne pressure speed generated lowers nega the Intake In mamfold also lowers However pIng of negative pressure mamfold IS suspended seconds by operatmg phragm and graph shown control III FIgure III the Intake for the drop a servo valve EC 26 In few dIa the curve IS In servo comparatIvely emItted flat under diaphragm link stroke Intake manifold Thus HC these emISsIOn condItIons IS controlled by these deVices The comparatIvely flat portIOn of the curve shown In FIgure EC 26 IS called EC015 second d presslOn Operatlllg 6 OperdtIng depreSSIOn changes dependIng on altItude and thus servo EC 14 and dIaphragm atlOns are vacuum and engine control adjusted III valve speed oper cOIncIdence wIth the altitude at wluch the vehIcle dnven automatIcally The graph FIgure EC 27 Illdlcates change operatmg depreSSIOn for changes In atmosphenc IS shown pressure and altItude m III EMISSION CONTROL SYSTEM 2 Install a WIth the and 3 29 m m to 3 000 rpm lever the engme speed lowers Figure EC 26 The as reqUIred for lowenng speed from 3 000 rpm to rpm IS normally 4 0 I 0 5 lime the engme A 1 000 seconds 23 speed release the throttle valve Normally shown 2 unloaded engme the engme crease 30 tachometer m of manual transmISSion case 28 3 0 I0 5 seconds or m of auto case matIc transmIssion 22 Ol 27 1 Ol I I 5 g adJustmg 2 0 25 adJustmg 0 Cl 3 19 Upon 2 0 make sure valve the lock adJust screw and agam that the throttle valve closmg tImmg 23 of the completIOn lighten ment 18 of the control screw m turn the counterclockwise 5 0 time than thIS range longer 0 20 of the control valve screw When the engme speed lowers e Ol III turn the clockwIse 26 e 0 lowers speed engme shorter lIme than thIS range e 21 When IS correct 17 Notes 16 When turmng the a 0 23 Allltude 5 6 WIth 103 ft x ECOl6 b do not screw mg a In operating depreSSIOn for changes In pressure atmospherlc and altitude screw read to Determmmg and adJustment I When known altItude When the pressure the arrow lme known IS A IS found i the J F When j operatmg depres by followmg k 1 be1 Turn the control valve adJust the control valve tIve pressure suspended m for so 2 screw 3 Lock Conlrol valve screw FIg EC 28 Control value that nega few seconds at the decreases from 3 000 rpm to Adjustment WIth a tachometer If a use the vacuum the followmg steps EC 15 turn the clockWise diaphragm draws Idhng speed or operatmg servo turn the counter lock stattonartly adJust screw the above described atmg depression IS correct and that the engme rated speed settles Idhng speed down at the Removal When gauge IS not available operatIng vacuum screw does ment and make sure that the oper the mtake mamfold IS a value of operatmg depreSSIOn found as descnbed m I above whIle the engme 1 000 rpm Vacuum adJuslmg or clockWise repeat adJustmg screw of the See Figure EC 28 and diaphragm depresSion IS low vacuum vacuum adJustmg screw Set arrow B 2 speed 7 o to hnk depresSIOn IS high vacuum adJusttng the hnk at atmosphenc found IS lme IS rd ofcontrol valve operatmg depreSSIOn by followmg sIon EC 27 FIgure operatmg depreSSIOn 0 How j o servo the draw not sure speed slow tIghten the of the control valve first When the c operatmg measunng and engme down time be lock adJust the screw screwdnver When depresSIOn FlfJ EC 27 Changes vacuum depress replacmg the diaphragm mstructlOns apply and servo control valve the followmg EMISSION CONTROL SYSTEM Control valve I If DIsconnect the tube from vacuum Remove two set And by screws I r It pOSItIons 3 It 6 I vacuum IS low at IS I Note pull the dlstnbutor the hose WIth felt at the top not felt at other IS IS 6 SOOF rear Installallon bolt 2 Control valve ClIp 7 Gasket 7 warmed up Lock the front and Hose 5 Tab FlIJ EC 32 Removal of sensor wheels by fully puIhng parkmg brake lever before conductlllg thIS test InstallatIon of sensor I sensor Install sembly I Catch adheSive always felt below the f PIpe 2 4 correct If vacuum IS temperatures 1 3 FIxed WIth satIsfactory before the engllle n off the and IS gear posItIon and c i from checkmg If fmgers 4 hose low are temperatures up the engllle vacuum the control valve 2 ambient warm the and gasket as the proper posItIOns m 3 Vacuum tube FIg EC 29 Remoumg control ualve Servo I the 2 servo 4 the servo the EC020 dIaphragm Fig EC 33 InstallIng to cotter pm and FIg EC 31 re Checkmg for operatIng of uacuum advance system the lInk Loosen the servo tube from vacuum wIth the carburetor WIthdraw move the dIaphragm Remove gether 3 DllIphragm DIsconnect dIaphragm lock nut and If any malfunctIon remove from the carburetor IS found check mentIoned above any by the and fuse 2 AIr Insert sensor Press whtle Note leakage resultlllg clIp Be sure to hold the A at the EC 33 to of the followlllg defects may be the cause I Poor connectIon or broken har ness 2 portIon avoId damage clIps mto stralghtemng the tabs fit Use the care not to sensor m Figure the pIpe damage the sensor from poor of gear connectIon of vacuum tube 3 Incorred operatIOn sWItch 4 of solenOId DefectIve operatIon Incorrect operatIon of temper valve 5 ature sensmg sWItch EC017 Servo dIaphragm 2 Lock nut 3 Lmk 4 Bracket 5 Stopper 6 C lTburetor FIg EC 30 Seroo dIaphragm Automatic temperature FIg EC 34 Insertmg clIp control air cleaner 3 Removal of posItIons I Flatten sensor tabs the of clIp Connect the hoses to the If proper WIth plIers Pull off the hoses 2 Transmission controlled vacuum engme at normal ambIent temperature respective posItIons of which they were removed 3 the clutch and race the Note the the hoses from advance InspectJon Dtsengage Note Pry the tab of clIp WIth a dnver 4 crew EC022 Take off the sensor EC 16 and clIp FlIJ EC 35 ConnectIng hoses EMISSION CONTROL SYSTEM stall Inspection When such rlllsed by the Among devIce the possIble troubles of tills the most hable IS permanent opemng of valve This trouble IS not noticed weather as poor tardy but m devIce before the Another m warm cold weather appears performance of engme such acceleratlOn hesItation or the valve m aIr regardless au excessIve decrease m fuel consumptlOn power The mspectlon of t1us deVIce should be proceeded as follows trouble willch mIght be that the underhood ThIS trouble appears engme or the carburetor the temperture of suctIon the sensor willie the engme as extremely first mspect tills checkmg expected kept closed by IS claIm has been a user IS of Appearance around IS runlllng the form of 1 FIrSt Illspect whether the vacuum are connected to the correct hoses posItIons FIl EC 36 Correct posItion of hoses 2 Inspect dIstortion Checkmg I or the hoses for cracks pluggmg of vacuum motor With the engme the posItIon of valve at the end ofmlet pIpe for mspectlon The correct condItIon of valve IS that It keeps open stopped mspect placmg a nurror and the mIet of underhood that of hot OtherwIse mspect the closed aIr lInkage aIr of valve 2 DIsconnect the hose at the um motor vacuum mlet and dIrectly apply of mamfold to by connectmg by the mouth vacuum another hose otherwIse found ill vacuum Inspect hnkage mspect lmkage j EC023 EC 7 suckmg no au mlet IS m IS good If found defect trouble IS m IS the motor If the valve FW EC 37 Inspecting ualue positIOn lmkage And when the motor may be substituted for tills process If underhood closed by the valve valve condItion vacu does not close then EMISSION CONTROL SYSTEM EC024 CheckIng 3 If It The valve shows correct condItIOn keeps underhood when the passage In au InJet closed the hose IS stop ped by tWlstmg 01 clamplllg It while applymg vacuum If otherWISe It IS an mdlcatIon of leakage In the vacuum When check defect replace IS the found au by cleaner tills as CheckIng that the engme test IS conducted Before runmng the engme make 2 certam that the valve SIde an IS by keep temperature around the sensor low takes conSIderable It of time for the valve to begm open or m some case It hardly opens Tills should not however be on underhood au regarded as If the fully opened Start the engllle and operate Idling speed 300F as length motor to The valve condItIOn If underhood au IS In SIde It at good fully ImmedIately after startmg 4 Carefully watch the valve ascertam that It gradually begms of sensor Perform the engme test 109 the cooled sure before the down up open as the engme when the ambIent temperature warms IS conduct put to ter as WIth thermlster not operate condItion the cleaner au or close to the adheSIve a IS folloWlllg senIOr cover and small thermome sensor as tape cleaner cover agaIn 1 EC 39 CheckIng FI EC 18 does If ItS or Remove the a as valve test to But trouble satlsfactonly questionable 5 closes sembly I IS 3 motor 4 below 850F Make uacuum Install pOSSIble the au EMISSION CONTROL SYSTEM 6 the Start Idling I 2 and engme descnbed under as 3 and above contmue paragraphs Faslldle sleps cam When several have passed and the valve IS partIally opened read the thermlster mdlcatIon It IS correct If the readmg mmutes falls between 1000 and 1300p readmg abnormal IS If the the replace c 7 0 l On the engme Idle compensator as follows before replacmg l with an eqUIpped as service J O M r sensor optIOn do the sensor the hose on Idle compensator by tWlstmg or clampmg It and check the temperature as gIven m Clog SIde paragraphs and 5 ture the 6 shows thermometer If the above correct the Idle compensator replace readmg IS abnormal Throllle chamber EC025 tempera replace If the J EC 40 Fast ulle adjustment Fl sensor Vacuum break I Completely 4 close the choke valve 2 Hold the choke valve mg the by stretch rubber band between choke shaft lever and the stationary part of carburetor Electric automatic choke 3 the Gnp pl1ers and pull Adjustment Past Idle adJustment vacuum out shown by between tlOn carburetor manual B m adJust the the tllustra the choke valve and body to transnusslOn 0 038 mch for and verucle 0042 mch for automatic transmISSIon vehIcle by bendmg vacuum break rod fully B adJustment break stem with Under thIS condItIon gap Choke valve Remove the bl metal cover Place the fast 2 Idle arm on the I second step of the fast Idle cam Then adJust the fast Idle adJustmg screw m way that the clearance of the A throttle valve shown at m the such a IllustratIon manual will be 0033 verucle transmiSSIon VaCllum mch for break rod Vacuum break stem and 0044 mch for automatIc transmISSIon vehIcle Notes If engme speed suffiCIently and IS startmg adJust the a there eXISts mch a WIder does not unstable nse after clearance unttl clearance of 0 004 than the specIfIed value b If engme mg adjust o 004 mch over unttl IS speeds after start the clearance of obtamed Vacuum break adjustment J EC 41 Fl Choke unloader adJustment close the choke valve I Completely 2 Hold the choke valve by stretch fully opens 4 Under thIS condItIon rubber nng between the choke Ing shaft lever and the statIonary part of clearance the carburetor tor 3 unloader tongue a Open the throttle lenr untIl It EC 19 Cn m adJust the the IllustratIon be tween the choke valve and the carbure body to 0 079 mch by bendmg EMISSION CONTROL SYSTEM Make Note valve fully buretor IS the that sure opens mounted when on throttle the car the velucle If the throttle valve fads to open the fully becomes m III ac unloader operatIVe resultmg celeratIon after the poor engllle Bi metal setting of bl metal heater Measurement IS resIstance started Install the bl metal C on Choke valve resIstance body IS 9 2 to 9 6 ohms tance place that the the range from III resIs flow of electnc the through current m Measure the the wIthout sure the termmal and the across carburetor o cover the carburetor Make heater and at about 700F Note Use an accurate strument such as measurmg Ill wheatstone a bndge 2 BI metal cover settIng PosItion the bl metal mdex mark IS pomt EC027 Note cover at until the the mIddle of the scale When somewhat set bl metal Fig EC 42 Choke unloader adjustment alIgned cover over choked after turmng it clockwIse the scale Dash pot adjustment Automatic transmission vehIcles I It speed IS necessary that the only IdlIng of engme and mIXture have been well tuned up and engme IS sufficIent ly warm 2 Turn throttle valve read engme speed by hand and when the dash pot by about one dIVISIOn graduations of Just touches the stopper lever 3 AdJust the posItIon of the dash pot by turmng the nut until the engme speed IS m 2 000 rpm 4 Make the range from sure 1 900 to that the engme smootWy reduced 1 000 rpm m from speed 3 000 IS to about five seconds Fig EC 44 BI metal couer setting EVAPORATIVE EMISSION CONTROL SYSTEM Checking fuel tank vapor liquid separator and vapor vent line I Check hoses all and fuel tank filler cap 2 Disconnect the vapor vent lme connectmg flow gUIde valve lIqUId separator 3 Connect a 3 way manometer and a cock alent 3 way Fig EC 43 Dash pot adjustment EC 20 change the vent Ime to vapor connector or an a eqUIv cock to the end of EMISSION CONTROL SYSTEM 4 vent Supply fresh line through Into the vapor au zero In a lIttle until the pressure becomes 14 5 Inch Aq 5 Shut the cock completely If the 9 the cock lIttle by IS heIght does not drop to short tIme when the filler cap removed It IS the of the cause stuffy hose After 2 5 8 the measure zero In a heIght should drop au the vent lIne case the breathing In made thoroughly IS fuel tank stuffy IS to repaued short tune or gUIde cleaner replaced blown from crank or Tlus valve 4 thus causmg In replaced pressure IS au IS pressed Into the valve from the carburetor SIde It flows to the fuel tank SIde and not suffiCIent delIvery of fuel to engme be or vapor lock It must therefore When the filler cap does not close the In Note of the completely WhIle the flow minutes IS It should never flow to the SIde case 3 lIqUId In the manometer 7 VarIatIOn of heIght should remain wltlun I 0 Inch Aq heIght But when the au other two vent lInes and leave It that way 6 not flow the valve should be 0 4 crankcase SIde opens when the mner mch Hg In case of unproper operatIOns or breakage re It place From 3 Way connector carburetor au cleaner Cock Alf Vapor lIqUid Manometer From sep nator fuel tank Flow gUide valve To crankcase EC029 g EC 45 CheckIng euaporatwe F emISSIOn controt system EC030 g EC 46 Flow guuie value F 2 Checking flow guide mto valve I the flow gUIde aIr IS valve pressed from the ends of vent lme of fuel tank SIde the DIsconnect all hoses connected to the flow Wlule lower pressure gUIde au should go through the valve and flow to crankcase Side If the valve au does ADJUSTING IGNITION TIMING ENGINE IDLING SPEED AND GAS MIXTURE CONTENTS ADJUSTING IGNITION TIMING ADJUSTING IDLING SPEED EC 21 GAS MIXTURE Check the spark plugs Thoroughly off dut wIpe the tIming mark dust from crank pulley Figure EC47 on 3 Warm up the engme 4 Install a tIming cylInder spark plug and dIstrI butor breaker pomts for condItIon 2 With tachometer EC 22 CO meter and tachometer EC 22 a EC 22 ADJUSTING IGNITION TIMING I Adjusting only Adjusting With AND the the No I and mstall a Loosen the set screw to such an extent moved 6 that by the distrIbutor can be BTDC 8 rpm the IgmtlOn tIming to 50 Top Dead Center by Before and Lock make correct hand Set the mately 700 7 AdJust the use of tImmg tachometer 5 and lIght wue suffiCIently on IdlIng speed EC 21 to approxl the lIght distrIbutor set sure that the screw tuning IS EMISSION CONTROL SYSTEM rectly IS that best engme so obtamed IdlIng speed 750 rpm for vehIcle wIth 5 vehIcle wIth automatIc transmissIon scnbed 4 percentage percentage Turn the clockwise for Idle adJustIng leaner mIXture a speed screw and to 700 rpm 750 rpm for the vehicle WIth auto EC 47 Tlmmg marks on crank of an 6 m model make speed approximately IS set to IS that sure IdlIng 600 rpm when D 2 0 at case so 700 rpm In when the IS de as that CO CO the case model of an automatIc trans make model sure approXllllately slnft lever that the 600 rpm D set to IS range range UH r ADJUSTING IDLING SPEED AND GAS adJustments automatIc transmISSIon In the screw so 2 0 and 4 above IS Idlmg speed mISSIOn adJustIng IS 2 0 at 750 rpm mISSIOn of an automatIc trans case the 3 5 In the the Idle Repeat matIc transmIssIOn the shIft lever pulley AdJust that CO percentage manual transmiSSIOn and 780 rpm for reduce the engme Fig 4 i 0y I r II 1 L Adjusting with CO MIXTURE t L l i j meter and tachometer Adj osting only a 1 2 one 3 1 with 2 tachometer one Warm up the engIne Contmue engme 3 suffiCiently operatIon for AdJust screw and the Idle Ie mInute under Idlmg speed throttle adJusting engme speed IS 700 rpm the AdJust screw mmute under t Warm up the engIne suffiCiently Contmue engIne operatIon for so that sIon 750 for the velucle wIth rpm e I Throttle adjustIng 2 Idle adjustIng for the vehicle wIth manual transmIs IdlIng speed throttle adJustIng adJustmg screw cor irj8rl Fig EC 48 Throttle adJus mg and idle adJus mg automatIc transmIssIOn TROUBLE DIAGNOSES AND CORRECTIONS CondItIon Rough engine Idle Probable or speed Idle seUmg adjustment control au Defect or cleaner 19l1ltton coLi spark plug too fast Trouble m breaker miXture and tumng Adjust control malfunctton of tgru system tenSIon cable Adjust Idle speed action tUJUng automatIc temperature tIon Engine Idle choke mIXture Incorrect baSIC IgmtIon Incorrect Correchve cause Incorrect carburetor Idle engme stop ugh Adjust automatic au temperature cleaner or replace tgfiltlon system polOt etc tluottle I1nk and Check throttle hnk and cable cable Incorrect throttle opener ad Adjust throttle opener Justment Trouble In control valve Replace Trouble Adjust automattc choke Defect In automattc malfunctIon of IgnJ or tlon system tenSIon cable 19mtton cod Car knock when Incorrect coastmg Justment Trouble Defect non plug high breaker opener ad replace tgmtIon system spark plug cable breaker etc EC22 Adjust throttle opener Replace control valve malfunction of IgI11 Igruhon cod or trol valve pOint control valve or Adjust con etc system tenSIon spark throttle In choke high pomt Adjust system screw screw or replace IgJUtlon screw screw SECTION EMISSION CONTROL L1 6 L 16 ENGINE SYSTEM GENERAL DESCRIPTION EC 24 CRANKCASE EMISSION CONTROL SYSTEM EC 25 EXHAUST EMISSION CONTROL SYSTEM EVAPORATIVE EMISSION CONTROL SYSTEM TROUBLE DIAGNOSES AND CORRECTIONS I NISSAN I NISSAN MOTOR CO TOKYO LTD JAPAN EC 26 EC 37 EC 39 MAINTENANCE AND TESTING EC 39 TESTING IGNITION TIMING ADJUSTING IDLE SPEED AND MIXTURE EC 49 EMISSION CONTROL SYSTEM L16 ENGINE 49 Ec Fill Left hand side externallJlew Fig Ee 50 Rear external u ew GENERAL DESCRIPTION There are three types of emiSSIon that must be controlled These Crankcase emISSion system 2 Exhaust are control emISSion Engme 3 Evaporative control S stem mtervals emISSIon control and reqUired Penodlc mspectlOn EC 24 out to performance and the system Closed system sefVIcmg of these carned modIficatIOns aIr most pollutIOn at systems should be the assure a recommended cleaner better longer lastmg engme complete ehmmatlOn of EMISSION CONTROL SYSTEM CRANKCASE EMISSION CONTROL SYSTEM CLOSED SYSTEM ThIS system turn of blow mamfold by for provIdes and carburetor A varIable orIfice valve to conduct crankcase blow the mtake the capacity re mtake gases to both mamfold au cleaner blow provIded by gases to gases mamfold through sucks the valve the plus carburetor part tube small a The air suffIcient draw handle any valve IS to of amount ventllatmg au IS air cleaner the through Into the crankcase connectIOn Under full throttle condItions the blow by Normally valve then drawn from the clean SIde of the throttle operatIOn of the engme the mtake by ventllatmg IS DUrIng of the under these conditions mamfold the vacuum IS msufficlent the blow flow by the through and ItS flow goes through the sealed system m the reverse duectlon In wIth cars blow by through some the carburetor an excessIvely illgh of the flow will go tube connectIOn air cleaner to the under all con dItions to 1 Crankcase ventIla tIon control valve 2 flame arrester 3 Sealed filler cap 4 Baffle plate S all level gauge 6 0 Rmg 7 all separator 8 Baffle plate EC031 Frg EC 51 Crankcase emiSSIOn control system closed type PERIODIC SERVICE 2 Disconnect them out with Once a year or every 12 000 nules If any obstructIOns I 3 Check hoses and hose connectors for leaks hoses compressed hose the Crankcase EmiSSIon Control Sys tem should be servIced as follows all cannot replace with and blow be valve WIth air free a new of one IS a found new be Check the function of the crank ventilation control valve EC 25 If the replace It assembly The control valve replaced 24 000 mdes case defective wIth a assembly new one should every EMISSION CONTROL SYSTEM EXHAUST EMISSION CONTROL SYSTEM CONTENTS EC 32 DESCRIPTION EC 26 CAMSHAFT EC 26 Dual pOint dIstributor AUTOMATIC TEMPERATURE CONTROL EC 26 AIR EC 26 LEAN SPARK DUAL MODIFICATION TIMING Throttle switch CONTROL SYSTEM POINT DISTRIBUTOR PL510 WPL 510 and PL521 PL510 and WPL510 with EC 31 DEVICE EC 31 DeSCriptIon EC 36 sensing switch EC 32 Performance EC 37 and EC 32 with speed detector 4 the 1972 model velucles and later Automatic products the for InJection System was cancelled and the new EMS Engme ModifIcation System was employed The new system consIsts essentially of the followrng components combustion chamber tern perature control ed when serves dnvrng rn urban dlstnct and prevent pollution while tillllng IS proVIded to the reqUIrement when dnvrng rn to au 5 Lean carburetlon the 6 Electnc automatic choke meet 7 Boost controlled deceleratIOn de the suburbs Advanced VIce CAMSHAFT MODIFICATION configuratIOn 2 Camshaft modIfication 3 Spark tlmrng ReductIon of NOx has been ob control system Dual pomt dJstnbutor tamed by Intake open the rncreasrng of area PL510 WPL510 and PL521 with manual overlap 1972 model deg BTDC transmission 1971 model 12 Tlus 12 deg ABDC 48 Exhaust open deg BBDC 54 50 Exhaust close deg ATOC 14 10 Over deg 26 22 48 SWItch a In tlus system two spark tumngs namely Advanced and Retarded prOVIded rndependently are and they Between these two dIfference phase 10 degrees The be used can means tilllmgs there of 7 IS a degrees crank for 1971 model velucles Retarded tmung IS for the operatrng condItion EC 26 rntended as reqUlr tem a SWItch throttle tlurd gear SWItch followmg condItions when dnvrng See Fig electncal by a sensIng compnses a a relay and dual pomt dlstnbutor and the Retarded tllTIlng IS used when the satISfied are 52 The temperature mSlde the pas I SPARK TIMING CONTROL SYSTEM DUAL POINT DISTRIBUTOR system perature Intake close lap EC 36 B C D D cleaner Au ModIfied EC 36 only au 1 EC 36 sWItch PL521 third gear DESCRIPTION AI S EC 34 CARBURETION BOOST CONTROLLED DECELERATION Transmission mer EC 34 CLEANER EC 29 Accelerator swItch Effective AIR ELECTRIC AUTOMATIC CHOKE transm Isslon Temperature Speed swItch A T C DeSCription with manual transmISSion automatIc CLEANER EC 33 senger compartment IS above 500F 2 The throttle valve IS opened at angle of from 3 to 30 and WPL510 deg an for PLSIO and 3 to 40 deg for PL52l 3 The sluft lever IS gear posItion placed at 3rd EMISSION CONTROL SYSTEM SCHEMATIC DRAWING OF CONTROL SYSTEM FOR L16 ENGINE WITH MANUAL TRANSMISSION MODELS PL510 and WPL510 Igmtlon key To dlstnbutor Battery 1 Temp sensmg sWItch Advanced Retarded breaker porn t breaker pomt Carburetor SWitch for detectmg wIde open throttle pOSltlon SWItch for detectmg close throttle pOSltIon f EC 52 A Schematic draWing of control system for L16 FI engine with manual transmISSIon SCHEMATIC DRAWING OF CONTROL SYSTEM FOR L16 ENGINE WITH MANUAL TRANSMISSION MODEL PL521 19mtlon key To dlStnbutor Battery 1 Temp sensmg sWitch Advanced breaker pomt Retarded breaker pomt TransmiSSIOn Accel Carburetor L16 f EC 52 B Schematu draWing of control system for FI manual wIth transmISSIOn engine EC 27 o ff i ll n0 O z 0 o 0l o cs 0 Ii 0 sSr 0q p o O 0 0 t Q g t 08 Q gg g ec ast o f f i S Q er ft g0 s So r o 0 m th dYLS transmiS on L5 1510 Datsunl of 15IO Manua case MI1 1n YS UlOL of CO 0 oW Tll l 1 RRj to Sl 0 Of T10ERjNS high roll lowers 2 Ol 1 BLETj peratteurme when 0 340f at 2i EMISSION CONTROL SYSTEM PL510 and WPL510 with automatic sWitch transmission tlmmg throttle sWitch and dual pomt the Retarded and dlstnbutor used IS condItIons See This perature system consIsts sensmg SWItch of a a tem speed I FIg are when the followmg fulfilled dUrIng drIve 53 temperature mSlde the pas compartment IS above 500p The senger 2 The velucle speed above IS 13 mph 3 The throttle valve IS angle of from 3 to 35 opened at an deg Table 2 shows the operatIOn of each control sWitch under a normal operatmg condItIon of the velucle SCHEMATIC DRAWING OF CONTROL SYSTEM FOR L 16 ENGINE WITH AUTOMATIC TRANSMISSION IgmtIon key Battery Temp 1 sensmg SWltLh Advanced Retarded breaker breaker pomt pomt SwItch for deteetmg close throttle ltIon pO f EC 53 SchematIc draWIng of control system F for L16 engme wIth automatIc transmISSIOn EC 29 fJt i Do r fJ z o o Zt o fJ fJ i retarde prOVIde 0 TIMNG Retarde SPARK 34OF SOOF Advanced the NT SPE D Ih OFF OFF OFF the 13 car 13 the ltSraSInS11On speed mph ON under SWtheitch the b e l o W b e l o w a b o v e above OFF And over SWItch Wh e n mph s p eed ON OFF ON OFF IS 13 IS OFF ON IS IS mph mph13 mph mph13 13 tmung emIS on When spark lower obtamed 0 0 0 0 0 o SW can IS beloW above 0 be Automatlc the wpL5l0 detcmgthrotle ton o I for PLS SW SY TEM THROTLE CONTROL open pOSI ON ON ON ON ON OFF throtle more degre s OFF ON the When valve than SWItch valve the detcng pOSitIon throtle throtle dosed OFF opened ON the nearly when the OFF OFF ON ON OFF ON ON IS When valve sWtheitch And sltghtly SWItch tempratue comparten 34OF SOOF SW OPERATIONS TEMPRAUE SENSING the OFF WIde WIth over throt le under throt le 13 up warm g start and hot start start start Engme cold Engme Idltng or or m WIth mph wo when below OFF And IS IS from above ON IS low IS erature SWItch SWitch rises loW to seni g hIgh temprwhatueen lowers from tempratue S20F at CrUlsmg Crulsmg CruIsing open Coastlng Remarks With mph to of acelrtmg partialY acelrtmg partaly acelrtmg throtle or high the open open the 340 ON 13 temp SOoF F of It IS the When pas eng r below above closes hystersIS the SWItch 2 CONDITON OPERATING of IS OF TABLE the IS IS SWitch close TIMNG AIT IS IS SWItchwIde for open 3S tempratue opens when Operation metal 340P It Note bl at EMISSION CONTROL SYSTEM Accelerator switch PL521 only Tlus sWItch IS and the operated by the accelerator pedal ThIS show set at the dashboard when the ON of movement pedal depressed otherwIse shOWing OFF IS Accelerator sWItch Accelerator pedal E C032 sWItch rnstallatron 1 EC 54 Accelerator FI PL51O Transmission third gear switch Tlus switch IS apphcable to and WPLSIO PLS2l wIth manual transmISSIon The the switch operated by stnkmg rod and IS movement of the fork rod gear In the transmIssIon The thud ON sWItch shows the posItion the OFF IS m when gear thlld otherwISe showmg Third gear SWitch 2 Reverse gear sWitch I rnstallatlon Frg EC 55 Gear sWItch EC 31 EMISSION CONTROL SYSTEM Temperature sensing operates 2 senslOg sWitch I 2 Fllf EC 56 PosItion of temperature sensmg sWItch Speed switch accelerator 7 Temperature lever With pedal switch Hood lock control together 3 Speedometer Speedometer Speed detector Fllf cable EC 58 Speed detector EC063 and EC 60 Throttle sWItch speed detector These and are applIcable to the PLSIO WPLSIO wIth automatic trans nusslOn The speed nuddle dashboard of vehIcle speed to speedometer speed speed set IS In JH the The followmg table operatIonal condItIon of U cable at to IS 0 speed sWitch OFF to when It exceeds mterconnectlllg them The when the 13 13 shows mph mph and FIg EC 59 Speed sWItch Throttle switch EC034 On WPLSlO Fllf EC 57 SectIOnal VIew of speed detector the Datsun PLS 10 this sWitch IS set crank of the accelerator on and the bell lInkage and Electnc current Carburetor throttle valve Throttle sWitch SWItch I SWItch I 1 1 SWITCH I I SettIng 21 EC035 EC32 at Idle OFF ON the the throttle switch and the current of transmlt the varIation sWItch shows vehicle ON detector of the 2 electnclty EMISSION CONTROL SYSTEM Throttle Electnc current Carburetor sWItch throttle valve I SWItch SWItch 2 I I I SWITCH WITC I I 2 I 11 Open ON ON W de open ON OFF I I I EC036 I I I SWITCH I I 12 I EC037 Flf EC 61 Operation of throttle SWitch In the Datsun PL52 set the to body thIs swItch IS of carburetor and IS operated by the cam plate to the throttle valve shaft connected of The range SWItch umt Setting place TurnIng dlIectJOn ON at and IS of the throttle OFF as Illustrated below Idle 400 ThroWe valve opemng angle E C038 Fig EC 62 OperatIOn of throttle SWitch PL521 Dual point distributor The dlstnbutor for Ll6 engine has pomts located opposite two breaker each other with shown The m a phase dIfference as FIgure EC 63 dIfference m adJusted by the adjusting screw phase dIfference of 7 crank angles adopted Those phase can be two placed parallel breaker ill A ClCCUlt IS works when the and are works the pnmary Igrutlon OFF EC33 pomts The the retarded relay advanced when the breaker pomt turned ON IS breaker relay IS pomt turned EMISSION CONTROL SYSTEM 20 20 IS 15 Former 0 Model 0412 81 c From Oclober 10 10 u u 1971 producllOn I I Model D412 84 t Cl Cl 5 5 Os 25 15 10 20 DIStributor rpm 25 xI02 20 IS Vacuum remams l 10 advance unchanged I e t Cl 5 E C039 1 Condenser 2 Phase difference 3 7 crank degrees Advanced breaker 4 Retarled breaker o 8 10 sensor dlld 16 18 20 24 22 mHg FIg EC 64 Drstrrbutor aduance characterlshcs an all operated by 14 Vacuum f EC 63 Dual pomt dlstrrbutor FI AUTOMAT I C TEM PERATURE CONTROL AI R 12 control valve willch mtake mamfold IS vacuum The vacuum regulated at the valve IS by the temperature of the sensor CLEANER A T C AIR CLEANER Description au The automahc temperature control cleaner always automatically keeps mlet au temperatures constant and thus makes leaner carburetor calIbra possIble consIstent wIth good dnveablhty ThIs therefore reduces the exhaust emISSIons as compared WIth tIOn Au mlet pIpe 2 Vacuum motor ass y normal carburetor cahbratton It also prevents Icmg m provrng operatmg Tills cleaner cold weather 4 Hol performance a specIal system employs equIpped 3 Tempelature un wIth a 5 Au all au sensor ass pIpe control valve EC041 f EC 65 AutomatIC temperature control FI temperature EC34 air cleaner y EMISSION CONTROL SYSTEM When the arr engme behaves IS temperature as the runnmg to close low wIth underhood valve so VIa of mamfold mlet the and mtroduce hot arr In tlus way the valve aIr stove mounted on the exhaust a mIXes underhood keep to automatically and hot the carburetor au aIr as so temperature 1090F at about heavy throttle operatIOn operates so as to obtam Durmg the arr valve sufficIent power cold au passage by fully opemng the regardless of wet au temperature EC 68 shows the state of Figure cold au under passage dItions of wet arr con vanous temperature and loads To mtake mamfold E C042 1 Au mlet pIpe 9 Idle compensator ass 2 Diaphragm 3 Vacuum chamber 4 DIaphragm spnng 5 Vacuum motor ass y ass II Au bleed valve closed 12 6 Au filter 7 Temperature sensor Hot 13 Au 14 y y 10 Onflce au Open pIpe control Intak valves mamfold Lmkage vacuum 8 BI metal 6 7 In Hg Open FIf EC 66 Hot aIr delwery mode Durzng cold engine operation 28 Hg Heavy When above partially au temperatures 1000 F the open the sensor valve temperature further nses o become 118 F the valve acts to the When au fully opens of hot au and supply cold au only Open Open Open load lOOOF stoppmg 11S0F Inlet mtroducmg mto the carburetor and exceed au temperature E C044 FIf EC 68 State of cold aIr passage In PL510 and WPL510 models Idle A T C cleaner au mdependent The use 8 BI metal 1 Au mlet pIpe 2 DIaphragm 3 Vacuum chamber 9 Idle compensator 10 Onflce 4 Diaphragm spnng 5 Vacuum motor ass y 6 Au futer t I All bleed valve 7 Temperature 14 Lmkage ass FIf sensor ass y open 12 Hot au pIpe 13 Au control valves y EC 67 Underhood aIr delwery mode During hot engine operation EC 35 prOVIded ThIs of the ATe PL52 I model for IS provIded pensator EC043 IS compensator as m deVIce aIr IS cleaner tropical WIth the Idle sefVIce an trus area com EMISSION CONTROL SYSTEM UnJoader 4 LEAN CARBURETION durmg before the Through adoptIOn temperature control settmg of carburetor has ratio sacnficmg engIne devIce proVIde obtam at leaner mIXture 5 posSIble WIthout performance WIth a newly m the amount of been eqUIpped suffiCIent engme output certam a extent so adequate an Vacuum au 4 Throttle adJustmg Secondary dIaphragm chamber screw 2 BI metal assembly 3 Fast Idle earn dIaphragm screw FIIJ EC 70 Constructlon of electrIC automatIC choke WIde open runnmg choke ready by IS engme has started thIS valve extent so to at Just after the crankmg 5 Slow adJustmg to as fuel mIxture The moment when engme m has to open the exhaust gases Further power valve an ennchment pollutants a cleaner the tlus unJoader makes the choke valve of automatic become resultant reductIOn more au acceleratmg the engme warm up penod that IS choke valve opens suffiCIently When as dIaphragm forces open the predetermmed to prOVide proper au fuel to ratio BI metal 6 case mdex mark bl metal case The mdex mark IS used for settmg the moment of the bl metal wluch controls the au fuel P S Vacuum Jet Vacuum Jet nuxture ratio requued for starting Vacuum pIston 1 I Secondary BC D D control I 2 porlton Secondary diaphragm chamber 3 Fast Idler Pnmary earn BOOST CONTROLLED DECELERATION DEVI CE B C D D FIIJ EC 71 Constructlon of electTlc E C045 au tomatlC choke FIg EC 69 Power value system Description The boost controlled deceleratIOn deVIce B C D D emISSIOns serves to reduce HC emItted from engIne dunng coastmg The mamfold lugh coastmg prevents complete BI metal and heater ELECTRIC AUTOMATIC CHOKE as bl metal the Fast Idle warms a bt metal mterconnected to the choke valve and opemng obtam determmes the amount re large so as to of mIxture of engme With result a amount of HC emIssIons IS emItted mto the atmosphere BCD D has been the Idea It obJectIOn cam of throttle valve proper that on cam fast Idle from combustion because of per rotation through the choke valve lever The An electnc heater through the engme starts and warms The deflection of bl metalls transmItted to the choke valve 2 dUrIng duced amount of mIXture per cylmder Electnc current flows heater vacuum the mIXture that deSigned based ehmmatmg tlus of pre determmed vacuum value addItIOnal mIXture such m operates when manifold a way exceeds prOVIdes It of optm1Um a an mIX controls the posItion of choke valve and throttle valve m accordance WIth correspondmg the upon the warmed up condition of the nuxture engme Complete combustion of fuel IS assIsted by tlus addItional mIxture and remarkably reduces the amount of elapse of time or the warm up condItIOn of engme The each constructIOn and functIOn of part of thts carburetor follows See FIg 70 are as choke 3 valve wluch Fast Idle Tlus to the opernng screw m adJustmg adJusts turn depends screw the opemng of the throttle valve of fast Idle EC 36 of the cam ture ratio mamfold and by He contamed quantity opemng passage m mto m the the the separate carburetor exhaust gases EMISSION CONTROL SYSTEM I Dtaphragm r I I 2 Vacuum control valve 3 D aphragm II 4 MIxture control valve 5 Coastmg aII J J bleed II 6 Coastmg atI bleed I 7 Coastmg Jet j Secondary mam Jet Boost passage E C046 Fig EC 72 Constructron of B C D D Performance The CD I dIaphragm and when the pre determIned open the Tllis opemng vacuum vacuum acts control vacuum makes Intorduce chamber so a to @ diaphragm 11 CID When dIaphragm second actuates the control mIXture valve operates @ opens vacuum the determmed value amount controlled mIXture by of the mIXture IS @ and vacuum kept of amount depends the servo actIon of the control valve The may that the mamfold so be the mIxture mto the manifold The @ control valve II passage and Introduces the addItIOnal mamfold the Into as valve the and vacuum exceeds vacuum value Figure m EC 72 detects the mamfold upon the mamly mIXture au coastmg @ wllile ItS mIXture the pre at ratIO bleed II determmed IS the coastIng Jet j and coastmg bleed I @ by air EVAPORATIVE EMISSION CONTROL SYSTEM CONTENTS DESCRIPTION EC 37 Datsun PL510 WPL510 and PL521 DESCRIPTION system IS composed of the followmg four baSIC elements ThIs I Fuel tank wIth posItIve seahng fIller cap 2 Vapor hqUld Vapor 4 Flow separator vent lme gUIde valve gUide valve Datsun PL510 WPL510 and PL521 When the engme ratIon gas fuel flow fIlls gUIde EC 38 at rest IS 2 Once fold evapo the closed type tank A valve opens when the gas above 0 4 Inches Hg The IS stored the m EC 37 flow the gUIde the crankcase and sucked bustIon fuel m gas mto the au mam cleaner mamfold for are com pressure of the fuel tank vapor hqUld the When by gUIde negatIve the flow lme be decreaSIng the vent vapor valve to send fresh air from au operatIon crankcase carburetor closed type separator and comes starts engme evaporatIOn the vapor vent lme passed through valve IS In hqUld separator and fuel pressure gas produced tank vapor 3 Flow EC 37 I opens the carburetor cleaner to the fuel tank EMISSION CONTROL SYSTEM I From carburetor aIr cleaner To crankcase Flame arrester PosItIve sealmg filler cap Vapor vent f Ime Flow gUIde valve The valve opens when the pressure IS over 0 4 lOch Hg I 1 Crankcase ventIlation valve Fuel tank EC013 FIfI EC 73 Evaporatwe Flow guide valve Tills valve operates to prevent the backward flow of blow the crankcase and the engme room IS by gas from mounted mSlde A F and C makes are EC 38 emISSIon engraved m control system pornt gap the body of the valve to mdlcate the connectIon of the vapor vent lme EMISSION CONTROL SYSTEM TROUBLE DIAGNOSES AND CORRECTIONS EXHAUST EMISSION CONTROL SYSTEM Use the chart followmg as an aId m trouble shootmg the exhaust ellliSSlon control Possible Trouble Incorrect Idle mixture ExcessIve backfire exhaust Leakage of fresh air Defect spark plug high tensIOn IgnitIOn tImmg adJustment Incorrect carburetor Idle adJustment or Incorrect Rough engme cause malfunctIOn of the IgllltlOn system cable breaker pomt IgllltIon coli etc Defect system system adJustment of Idle Idle mIXture choke settmg speed from the mtake malllfold malfunctIOn of the IgmtIon system or cable breaker pomt Ignition COlI spark plug hIgh tensIOn elc Incorrect basIc Ignition tunmg Incorrect Incorrect carburetor Engme surges at all of cam lo tappet clearance adJustment adJustment of Idle Idle mIXture choke settmg speed or malfunctIOn of the IgllltIon system cable breaker pomt Ignition COIl etc Defect speeds Incorrect carburetor 01 Engme stop dash pot settmg adJustment of Idle spark plug hIgh speed Idle only mIXture tension choke settmg automatic transmISSIOn Incorrect basIc tunmg Carburetor Icmg MAINTENANCE AND TESTING CONTENTS GENERAL MAINTENANCE EC 40 AUTOMATIC Distributor ECAO AIR Spark plug EC 40 Carburetor EC 40 High tension cable EC 40 TEMPERATURE CONTROL CLEANER EC 43 Sensor EC 43 ELECTRIC AUTOMATIC EC 40 BOOST CONTROLLED Air cleaner element EC 40 DECELERATION Adjustment SYSTEM EXHAUST Testing Testing Testing Testing of EMISSION CONTROL SYSTEM spark advance control system of accelerator sWitch PL521 of transmiSSion sWitch Testing Testing of speed sWitch ECA7 PL510 and WPL510wlth automatic transmission EVAPORATIVE EMISSION ECA2 CONTROL Checking EC 42 PL510 and EC 43 EC 39 SYSTEM of flow EC 48 EC 48 of fuel tank vapor separator and vapor Checking EC 42 WPL510 With automatic transmission EC 47 of speed sWitch ECA1 of throttle SWitch Datsun PL521 Testing pressure of BCD D ECA1 of throttle SWitch Datsun PL510 and WPL51O DEVICE of operating EC 40 EC 41 EC 44 EC 44 Adjustment Battery CRANKCASE EMISSION CONTROL CHOKE liqUid line ECA8 gUide valve ECA9 vent EMISSION CONTROL SYSTEM GENERAL Battery MAINTENANCE To make level It spection IS mamtamed Test exhaust at recommended baSIcally be that certain are emISSIOns WIth low a that the should graVIty in WIth more made every 12 battery specIfic gravIty hydrometer SpecIfic accurate an be at least Add dIstilled engine operatIOn haust enusslOns will be obtained WIth bnng flUid to proper level regular mspectlons and recommended servIcing at the specIfied Interval ternnnals months or 12 000 mlles every and Best ex mllllmum Clean Fig EC 75 Checking ofspark plug pOint gap Carburetor Check the breaker pOints for abnormal plttmg and wear Replace If necessary Make sure that they are m correct ahgnment for full contact and that are pOint dwell Clean correct apply to the and gap dlstnbutor cam grease Breaker pOints should be Intervals not specIfications as reqUired Proper carburetor Idle adJustment IS ImperatIve exceedmg and exhaust emISSIOn Refer mIXture Idle adJustmg best mstructlOns speed grease to prevent corrosIOn has element been paper treated therefore there IS The speCIally need clean to It It should be every 24 000 nules replaced CRANKCASE SYSTEM 1 12 000 nules High Use tension cable an 2 to check resIS from dlstnbutor cap WIth the remove butor together cables Do not remove Connect cap cable between the spark plug the SIde and the dlstn secondary cables from ohmmeter terminal the on corresponding the resIstance 30 000 ohms the cap tance more cable remove and only DIsconnect If any IS than more the cable from check the cable If the resistance than 30 000 ohms and resIs IS replace stlll the assembly all hose obstructIOns 3 Test hose con the control valve WIth remove and blow hoses au not be can replace WIth crankcase as free of a new one ventllatlon follows engme at runmng Idle the ventllator hose from the crankcase ventllatJon control valve If the valve IS workIng WIll be heard electrode mSlde the cap If hoses them out WIth compressed on nect the ohmmeter Check nectIOns for leaks secondary cables DIscon cables from spark plugs and tance Spar k plug tIghtemng clamps battery posts and clamps EMISSION CONTROL and mIXture at Fig EC 74 Checking of distrIbutor breaker pOint gap hght cable Mter gIven and WIck replaced WIth no for Settmg IgmtlOn hmmg and under the and posts to control the to coat adJust to dlstnbutor battery reqwred as or Air cleaner element Check the choke setting and Distributor water 1 220 corrections temperature the valve and be felt as a strong mmIedllltely hISSIng nOISe passes through a au vacuum when a should rmger IS the valve mlet If valve IS placed do not to clean It plugged attempt Replace WIth a new valve Check for depOSit pluggmg m the hose Clean If over necessary Remove and clean plugs m a sand blast cleaner Inspect each spark plug Make certam that they are of the specIfIed heat range Inspect Insulator for crack and chIps Check both center and ground electrodes If they are badly worn replace With new spark plugs Flle center electrode flat Set the gap to 00315 to 00355 Inch by USing the proper adJustmg tool Spark plug should be replaced every Fig EC 76 CheckIng ofhigh Fig EC 77 Tesling of crankcase cables ventIlatIOn control ualve 12 000 miles tensIOn EC 40 EMISSION CONTROL SYSTEM In EXHAUST EMISSION 3 CONTROL SYSTEM 12V advance control system Datsun PL510 WPL510 and PL521 DIsconnect wIres from the termmal of the dlstnbutor and the lead connect the ammeter between the lead for the retarded bleaker pOlllt WIfe and ground Igmtlon key m Make sure that the senslllg sWItch that 3 about valve IS 500F above the mdlcates ammeter amperes when partIally opened room Then the throttle and the shIft 3rd gear When the throttle lever IS valve IS wIde open or nearly closed or III a gear postlOn other 3rd gear the ammeter should the sluft lever Illdlcate IS In case of zero wife IS IS all current the IS IS with automatic transmissIOn how IS velucle on wIdely open b nearly WPL510 however cut It IS IS the normal PL52l For sWItch and throttle are normal In case both accelerator sWItch a IgmtIOn E C050 cod IS normal and b In 1 Cdse of IS mdlcate IS other that sure the PL510 and or over 13 ammeter when zero mph velucle properly stop the the speed sWItch sWitches speed the With a throttle positIOn operatIOns the work velucle and mspect the throttle sWItch and the connectIon oflead abnormal Datsun dynamometer ammeter should mdlcate zero 4 If the system does not not In case of Ddtsun abnormal not speed partIally opened case IS and dnve the engme ChaSSIS a vehIcle closed In electnc current on Make does the throttle sWItch of Datsun PL510 and ammeter and the retarded wife the road 3 the carburetor throttle valve or Start the 2 check not cut the connect sIde termmal pOSItIon and If and between the lead In case the electnc current IS cut a the lead wife of the sIde termmal of the dlstn DIsconnect butor dt 3rd gear sWItch 2 PLSIO Datsun PL510 and WPL510 cut posItioned normal IS Datsun Check throttle sWItch I other thdn 3rd electnc current ever of IS of case retarded sWItch 3rd gear IS a In case of Datsun PL521 2 3A e and normal IS Check sWItch I of throttle sWItch the If ammeter shows pla b WPL510 consIdered IS In 1 harness off the sWItch when the shIft lever gear case abnormal the dIscon found In case the electn I In of each found wrong check contmUlty takIng In case of Datsun PL52 I Check accelerator sWItch ongmal place harness the approx when zero put the connected to harness condItion of 4 Check Check sWItch II of throttle sWItch 2 IS the contlllUlty of each sWItch of As a result 6 7 sWitch III than If nothlllg 6 temperature and the ON IS IS temperature check ON Do not start the engme posItion 3 the voltage nghtly IS nectIOn Set the 2 new Check tf the lead sWitch WPL510 approx one termmal to the relay 5 1 a In case the 4 IS defectIve and must be IS WIth replaced Testing of spark voltage the case relay wlfes detector and at the relay Fig EG 78 Testing of spark advance control system In case zero m I the ammeter mdlcates step 3 Check termlllals If they 2 whether are m and Relay measure between terl11lnal mark and relay correct condItIOns disconnect ternunals of PL52 I not or loose are the with No ground See Advanced sIde termmal Datsun relay I voltage punch Figure Igmlton coil EC 79 EC052 Fig Relay relay E I Voltmeter Ground EC051 uoltage Fig EG 79 Measurement of Testing of accelerator switch PL521 of the msulatlOn of the I Make sure lead wife termmal to the accelerator sWitch EG 80 TestIng ofdual pomt dIstributor 2 DIsconnect the lead wlfes at the swItch and connect the ohmmeter to the termmals body EC 41 EMISSION CONTROL SYSTEM the clearance may be 0 0315 mch and tie SWI tch Accelerator sWitch 2 Make sure that tIonal sound accelerator pedal Make 3 between In there IS func a the sWItch when the tS depressed of sure the lead 1 termmaIs and 7 plate of the SWItch Inspect the clearance between the body and the mIcro swttch body the base 4 earn EC062 Ohmmeter Testmg ofaccelerator sWitch FIIf EC S1 3 The mIlmty pedal should ohmmeter not IS mdleate the when 00 the when zero accelerator pedal thickness gauge The clearance should be 0 0315 a 5 If It IS not over loosen the Inch or under 0 0315 screws adJustmg turn the throttle sWItch Itself so screws coupler and con the ohmmeter to the ternunals 2 or 1 and 3 and The mfimty pedal IS ohmmeter when 00 mdlcate should the accelerator depressed fully It should indIcate zero when the pedal IS partIally depressed released or If the SWItch does not work well 7 replace the sWItch as 8 m Inch mdlcate and It should depressed WIth Disconnect the nect msulatIon the wife tIghten the adJustmg 6 step sembly Install the cover and 9 that coupler securely and connect the IS depressed 4 properly keep push the sWItch Iftt does not work the pedal pressed and knob several tImes and conduct the measurement same as mdlcated m step 1 AdlustIng 2 SWitch 1 Clearance 0 0315 mch screw 3 Coupler Termmal 3 4 3 If 5 In the 4 step the sWItch IS found to be functIomng well release 5 Termmal 2 6 Termmal l 7 SWItch 2 accelerator sWItch adJusting nut and screw the sWItch assembly towards the pedal Leave the pedal alone at tlus the when pomt Even mdlcate zero screw 2 turns and more adjusting ohmmeter the the swItch for I lock by It 01 the CID E C083 nut 6 If the sWItch Itself well replace It WIth a IS not FIC EC B2 Throttle SWItch working new one of transmission Testing switch I Make sure between the lead transmISSIon of the WIre sWitch insulatIon terrnmal of the and the sWItch body Make sure of the msulatIon of the I DIsconnect the lead 2 Testing of throttle switch Datsun PL521 wIres at the swttch and connect the ohmmeter to the termmals should 3 The zero when the sluft lever IS ohmmeter m indIcate the 3rd posItIon And It should indIcate at other gear posItIOn mfimty lead wife SWItch termmal to throttle body throttle sWitch and wtres at the connect the ohmmeter to the termmals 00 4 the neutral step 3 replace m 4 If It does not functIon a new or mfimty correspondmg WIth the of the SWItch bemg pushed or and zero proper Check the posItion of the mIcro the sWItch adJust by adJustIng sWItch switeh Datsun PL510 and WPL510 from the throt properly If the ohmmeter mdlcates actuater Testing of throttle cover 00 over keep the throttle valve closed and push released Detach the mfimty opened IS 40 degrees 00 one I partlally opened closed until 40 degrees And It should mdlcate 5 properly the sWItch wIth or IS by finger posttton If tt does not work zero mdlcate should when the throttle valve the actuater of the SWItch several tunes gear mcludmg ohmmeter The when the throttle valve Dtsconnect the lead 2 the 3 IS screw so that the actuater of the mIcro sWItch may be allowed to travel 003 mch when the FIC EC S3 Testmg of throttle sWItch EC 42 earn plate pushes up the actuater EMISSION CONTROL SYSTEM 6 If In be to mIcro adJust the sWitch 5 step malfunctIOnIng with sWitch m step new the new one as speed switch PL510 and WPL510 with automatic transmission 1 DIsconnect speed 2 the lead Wlfes at the sWItch FIgure terminal 2 IS disconnected from the perly step 3 detach the cover and Inspect the posItIon of the armature 3 and return sprIng 5 If the posItIOn of the armature 4 the IS electrIc ClfCUlt of the speed IS them In same measurement out of order set take the rIght posItIon and as Indicated m 3 6 If It does not work step 5 replace properly the sWItch With a In new EquIvalent electnc speed SWl tch Note When a speed sWItch must be replaced With a new one replace a speed detector With a new one as the kIt of a speed sWitch and speed CIrcuit of respectIve up the catches of chp WIth Pry a screwdrIver Take off sensor and chp InstallatIOn I Place 2 Insert support sensor chp correct In When posItIOn domg sensor at ItS correct thiS posItIon EC 89 to prevent to temperature sensor When shown as In damage plaCing chp eqUIvalent sWItch the carefully In and return sprIng step Note POSitIOns where each hose has been connected If the sWItch does not work pro 4 one EC 84 Note battery and one 5 of Testing found replace a of the the posItion mentIOned IS FIgure do It wlule WIdenIng the to facIlitate the portIon of theIr tab Job detector I I AUTOMATIC TEMPERATURE CONTROL AIR I I I Ilr I I I I I I 1 2 3 I 1 Sensor 5 J CLEANER FIIJ Removal Termmal numbers r 1 2 5 1 PIpe Catch EC085 2 3 FIIJ EC B4 Speed sWitch 4 Hose 3 Connect the termInals of the Wlfes speed between SWI tch the and the battery termInals as shown m FIgure EC 85 Connect the voltage meter to the termInal 3 ECOt9 j FIxed WIth adheSive 5 Tab 6 ClIp 7 Gasket rubber FIIJ EC B6 Removal of sensor I Ing Flatten the tabs of sensor Fig Note 3 Remstall pOSItIons as hosed noted sensor attentIon not Pay particular damage sensor retain chp With phers EC B9 Installing m m the Step to same 2 under Removal FIg EC B5 TestIng of speed sWitch 3 The voltage meter should indicate FIIJ 12 volts It should mdlcate zero when the 2 EC B7 Flattemng of tabs FIIJ EC 90 InstallIng hoses Pull offhoses 43 EC EMISSION CONTROL SYSTEM Inspecbon the Among tlus IS devIce the possIble hose occur substItute openmg of valve failure will not as such engme hesItatIon tardy acceleratIOn stalhng When as or defect the mlet of to be closed condItIon of mspect hnkage If correct found IS mdlcates the found IS If otherWIse valve no If It au shows the It but cold weather It may dIsclose Itself an abnormal performance of m for underhood be probably notIced m warm or hot weather motor by connectmg another suckmg by the mouth may vacuum troubles of the most hable to permanent This pressure of manifold to the negatIve the m trouble hnkage of test followmg 5 Remove the stIck au thermlster a ometer close as cleaner a to the sensor WIth tape or the hke cleaner cover agam au as Place possible the and cover small therm or It vacuum motor engme type of lean operatIOn IS perceIved always mspect thIs devIce any before domg work any the on carburetor Another expected hood alr trouble whIch IS closed kept regardless of the mlet the while engme WIll trouble IS the valve by au temperature as ThIs FIff EC 92 Inspecting vacuum motor fuel consumptIOn of power This deVIce should be or msuf mspected as follows I First mspect whether the hose connected m the correct posItIon Inspect crack hose dIstortIOn Checking the or cloggmg of vacuum or hke IS for correct condItIOn of valve of underhood hot air If It underhood au the hose closed keeps the mlet and that of If otherwIse mspect alr open keeps correct the the mlet of closed when the passage stopped by bendmg or clampmg It wlule applymg vacuum If otherWIse It mdlcates that leakage IS takmg place m vacuum motor When IS defect found IS the portIOn replace tills at assembly the hnkage of valve of Check the au that the engme test IS 2 IS 860F Make sure cooled down before yourself Assure of valve posItion Start engIne If the and operate closed watch Carefully that open as It alr ImmedIately the valve warms to IS opens If the length of lIme for begm to open or It hardly ThiS should not regarded as the satIsfactorily to ItS however be reads tlus range or does not If any doubt ope ate left as IS operatIon further conduct the 44 EC the the mdl readmg If the WIdely apart replace WIth from sensor willch engme IS an Clog the hose by bendIng SIde of Idle compensator clamplllg It and check the temperature followmg the procedure as gIven m paragraphs 5 and above 6 or If the thermlster reads temperature replace the Idle compensator If It reads WIdely dlf replace the sensor ELECTRIC AUTOMATI C CHOKE Adjustment Fast lIlle adjustment Place fast Idle arm on step of fast Idle cam Then Idle adJustIng screw In such the first adJust a A 0047 car III the illustratIon fast way that the clearance of throttle valve at trouble valve If the correct IS partIally IS thermlster falls between 860F and l260F low It takes consIderable the valve to valve But up when the ambIent temperature duectly apply passed and the opened read the thenruster 2 to gradually begms the engme I Idhng Inlet of underhood fully descnp When several mmutes above It sensor contmue paragraphs have ferent open ascertam and 3 fully 4 motor Inlet and correct after startmg vacuum gIVen under cleaner WIth the conducted becomes the hose of engine tlOn catIOn and accordance WIth the III before startmg It IS correct If the mlet of the underhood au SIde IS valve DIsconnect Idlmg the Idle compensator eqUIpped do as follows before replacmg sensor It Illdlcates the correct condItIon of 2 Start 7 sensor engme runmng below 3 FIg EC 91 Inspecting the posItion of ua ve 6 WIth 1 at the end of mlet pIpe facilItates the The shows condItIon Checkmg motor With the engme shut off mspect the posItion of valve placmg a mirror should be such that It valve meltmg I Job The m Visual check 2 3 FIff EC 93 Checkmg EC054 n extremely runmng appear excessIve ficlency be rmght that the mlet of under IS shown Will be Inch for manual transmISSIOn and 0055 transmISSion car Illch for automatIc EMISSION CONTROL SYSTEM Notes If a sufficIently startmg there speed engme and adjust eXIsts a IS does not mch nse unstable after wIder than the mg adJust untIl becomes narrower specIfIed value b the clearance untIl If engine over speeds after start than the specIfIed the clearance 0 008 mch by value clearance of 0 008 EC055 FIg EC 94 Fast uile adjustment Vacuum break adJustment Completely 2 and the statIOnary part of carburetor 3 Gnp vacuum break rod wIth close choke valve Hold choke valve by stretchmg a rubber band between choke shaft lever plIers 4 and shown lustra tlOn adJust the bendmg B by ill the between choke valve carburetor body pull strdlght fully Under this conditIOn gap vacuum to 0087 illch d and by brake rod 1 2 Vacuum break rod Choke valve EC056 FIg EC 95 Vacuum break adjustment EC 45 EMISSION CONTROL SYSTEM Choke UlIloader 3 adjustment Open throttle lever until It fully Note 4 Completely 2 close choke valve Hold choke valve Under tlus clearance by stretchIng condition C the In adJust the Illustration rubber nng between choke shaft lever body and the stationary part of carburetor unloader tongue to 0 205 Inch by that sure the throttle IS If the throttle valve fads to open the unIoader becomes moperatlve between choke valve and carburetor a Make valve opens when the carburetor mounted on the car opens bendIng resultIng m the engIne IS poor acceleration after started EC057 J FI Dash pot adjustment Automatic transmISSion cars only Note speed IS necessary that the Idhng of engme and mIXture have been well tuned ficIently 2 up and engIne 2 by turrnng by hand and nut untll engIne speed IS as a measurIng wheatstone cover settIng bImetal FI Note cover 130 of the F I screw cam that the tip of dash pot touches stopper lever ahgned at until the the mIddle When somewhat over set bl metal cover after J EC 97 Dash pot FI adjustment BImetal adJustIng IS pOInt of the scale In follows Locate sure Bimetal mdex mark the range of 2 to 2 500 rpm 400 4 If a tachometer IS not available stage such warm Turn throttle valve 2nd oader adjustment accurate an PosItion read engIne speed when dash pot Just touches the stopper lever 3 AdJust the posItion of dash pot adJust as un brIdge suf IS Use mstrument It 1 EC 96 Choke choked turnmg clockwIse the scale by about one dlVIslOn graduations It of setting on Make closely I Measurement of bl metal heater resIstance Install the bl metal on cover the carburetor Make resistance across carburetor body to 10 2 ohms sure In place that the the termmal and the IS m the range of 9 8 WIthout the flow of electnc current through II Measure the resIstance heater and at about 700F EC 46 E FIg EC 98 BI meta C059 couer settmg EMISSION CONTROL SYSTEM BOOST CONTROLLED DECELERATION Warmmg up operatIon DEVICE unhl ContInue the When warmmg up operatIOn reaches Its normal engIne operatIng temperature Adjustment of operating pressure gauge Connect rubber hose between ReDD um and gauge I A the following Intake mamfold as to willie speed engIne and Idling A vacuum lugher second to gauge and the connechng operatmg pressure than the set IS constant at the a once nsen certaIn for pressure The pressure pressure willch has operatIng a on See A When negahve kept the measure absent IS lower than that of the case of A but IS tools screwdrIver 2 2 IS tachometer like that of the engme BCD D a dIagram vacu shown Prepare moper and negatIve pressure decreases WIthout bemg sustaIned whtle It IS falling Just vacuum IS remaInS atlve whIch ConnectIng of the operatIng pressure BCD D hIgh too value about and then one falls down gradually Idling negahve pressure See B dIagram pIpe Notes A a qUIck gauge such Bourdon recommended IS boost type response as s FIg EC 99 Connectmg tube type mercury manometer should be aVOIded b SpecIal tools are not req uired M T vehIcle 700 rpm neutral down the throttle valve hdnd At up to 3 000 load and close It from by releasmg tills moment pressure of mamfold 236 Hg and then In to 197m no the negahve rIses above gradually at normal Idle falls The takes When the operatIng pressure too range Racmg speed Idhng engIne Igmhon hmmg speed 600 rpm D RaIse the engme gauge settmg A T vehIcle to 3 500 rpm under the AdJust Idle engIne of Adjustment type vacuum 2 7 2 BTDC the pressure of Idling high @ CO 70 BTDC @ @@ about Hg process of tills pressure fall three forms as of the one I Lock Figures EC 100 EC 102 and EC 103 accordmg to the dlf ference of the operatIng pressure of illustrated IS In 2 L screw AdJustmg 3 Cover screw S c BCDD FIg EC 101 AdJustmg operatIng pressure Excessive operatIng pressure of BC D D Negdtlve pressure Negative A pressure Set Set pressure pressure TIghten adJustIng S screw as outhned below unttl correct pressure ldhng negative ldhng pressure pressure obtaIned Loosen lock ncgatIve JustIng Tlme Tlme EC061 FIg EC 100 CharacterIStic curoe fh hl negatwe pressure EC 47 detachIng adJustIng race S screw IS IS Ad acceSSIble after cover C screw clockWise engIne drIver tIghtly L screw Slightly turn tlus and then Do not fit tip of m screw slot screw EMISSION CONTROL SYSTEM Notes and then falls down to Turning adjusting a rotation elghth one tlon will cause a 8 screw tn eIther duec change tn adJusttng negative from S screw Hg for adJusting mcrease the In 21 26 to example screw clockwISe thIS ease seconds for decrease from for the negative pressure 21 26 inch Hg 2205 to the speed engine 3 000 pressure 4 to 5 rpm to 1 000 to Set pressure Manual transmISSIOn verucle example 22 44 mch 2185 to Insufficient operating pressure of BC D D Hg Automatic transmISSIOn verucle 21 65 mch 2106 to When Negal1ve NegatIve pressure pressure D 1 c pressure r r operatmg mstall to set pressure and lock tighten Hg pressure IS cover L screw securely In Set the equalIzed c Testing of speed pressure Operatmg switch PL510 and WPL510 with AfT pre ssure IdlIng IdlIng takes from It rpm to decrease from adJusting Turn Turn c threaded b pressure 2205 mch left hand IS to oper atmg pressure of 0 79 tnch Hg Tlus screw counterclockwise I negatIve pressure nn Refer rT the to instructions under Testmg of speed SWItch pL5IO and WIth WPL5l0 Tlme Tlme automatic transmis EC 43 Page sIOn EC090 FIg EC 102 Characterlstlc I When the operating pressure IS the negative lre press becomes constant for some wlule at a value below set pressure and then falls 2 IdlIng negative pressure See C dIagram dnver low negatIVe pressure tightly In screw slot low somewhat down to screw curve When exceedmgly EVAPORATIVE EMISSION CONTROL SYSTEM When operabng pressure equals set pressure Nega tIve the operatmg pressure low the negative pressure IS pressure WIll not fall down to Set and the pressure Idling pressure speed of engme IS not restored to Idlmg speed under tlus condItIOn the engme speed never reaches above 2 200 rpm Checking of fuel tank vapor liquid separator and vapor vent line Idlmg In extreme the engme speed faIls to attam IdlIng speed although the negative pressure becomes equal to that of IdlIng See dIagram D cases I negative TIme pressure 3 000 adJustmg screw I detaclung Justlng then S screw cover screw race IS SlIghtly the engme 3 way a and tip of connector a d cock or an change cock to the end of eqUIva the vent lIne 4 to 5 TIme see 4 EC091 vent FIg EC 103 Characlerrstrc curve proper negatIVe pressure turn tlus ad Do not fit lent 3 way 000 as accessible after counterclockwIse Connect I S fuel tank Disconnect manometer and I 1 outhned below until correct pressure IS obtamed Loosen lock screw L Ad Justing and hqUld separator 3 Loosen hoses all the vapor vent line connectmg flow gUIde valve to vapor 2 E 0 When the operating pressure is too low Check filler cap The once manifold remains vacuum after racing constant at set pressure EC 48 Supply fresh lIne through an the Into the vapor cock lIttle by httle untIl the pressure becomes 145 Inch Aq 5 Shut the cock leave It that way completely and EMISSION CONTROL SYSTEM After 2 5 6 heIght of the measure mmutes hqUld m the the manometer VarIatIOn of heIght should remam 7 wlthm I 0 mch completely the 9 If the zero a m heIght clogged Note short tIme heIght does not drop It IS the not IS of the cause In clogged to short time when the filler cap IS removed Aq When the f1ller cap does not close 8 zero m causmg m vapor lock It must or therefore be should drop to IS fuel tank breatlung thoroughly made thus msuffiCIent dehvery of fuel the to engme hose hne vent the case repaired or replaced 3 way connector CdJ l Au Flow gUIde Vapor liquid separalor Manometer valve EC029 Checkmg of evaporatwe FlEC 104 But Checking of flow guide valve gUIde au from blown IS It should never control system From flow to dlf cleaner the other two vent hnes all hoses connected to DIsconnect 1 the flow the when crankcase Side emISSIOn 3 flow valve While the air IS pressed valve from gUIde cleaner SIde should go through the valve and flow to crankcase side If the au does pressure becomes 04 mch au not flow the valve should be replaced SIde and 4 or au It flows to the fuel tank Wlule lower pressure au IS pressed mto the flow gUide valve from the the ends of vent hne of fuel tank sIde 2 mto the carburetor crankcase SIde Tlus valve opens when the of Improper Jr mner In nkcase case Hg operatIOns or breakage replace It EC030 105 FlEC Flow gUIde valve TESTING IGNITION TIMING ADJUSTING IDLE SPEED AND MIXTURE Engme accordmg with tune up must be done NIssan to SpecIficatIOns the necessary recommended But the WPL510 and PL521 equipment as followmg pro Install the cedures are recommended for Datsun 2 PLSIO WPLSlO and PLS2I with IgmtlOn speed are tlmmg settmg adJustmg Idle procedures and mIXture If these taken the emISSIon trolled below the level and m WIll be maximum con allowable 5 Datsun PL510 au cleaner Warm up the engme the transmiSSIOn gear posItIon 3 Connect m thoroughly Operate the engme at 2 000 rpm IS seconds under no load condItion 7 Run the engme at Idle for one nunute Igmtlon tachometer and rpm 770 rpm transmISSion tlmmg hght 4 6 for about the neutral the Igmtlon t1mmg at 70 AdJust BTOC by conventional method Set the Idle speed at about 700 adJustmg screw rpm EC 49 for vehIcle screw and the by automatic the throttle Idle adJustmg EMISSION CONTROL SYSTEM 9 Set the engme 720 rpm for the vehIcle mISSion adJustmg speed at 700 rpm automatic trans by turnIng the Idle clockwise for a leaner screw 10 Connect the lead the advanced and ternunals engIne tImmg of speed wire between the retarded sIde the dIstrIbutor The drop by about should IS through not correct repeat steps done after step 15 above model Idle speed when light rpm gear pOSItIOn IS set to Dnve Set I the retarded breaker pomt 700 rpm at adJ ustIng screw AdJust the percentage 2 carbon monoxIde to 2 0 In case IgnItIOn hmmg IS check ed the adjustment of the pomt gap the spark plug descnbed m IgnItion tlmmg of If the tUnIng IS not at TDC repeat steps 12 and 13 above untIl It made at the screw 3 and throttle TImIng should rpm sIOn rpm tween the advanced and the retarded pomt gap adJustment first smce the Igmhon t1mmg changes when It IS made after the IgIutton timmg IS SIde tenmnals of the dlstnbu tor adJusted throttle becomes TDC the lead wIre be of the 700 rpm mamtenance same EC 50 hme must 4 screw IgnItton remam hmmg 70BTDC at 700 720 rpm for automatIc transmIS be general adJustmg the Check Make the 14 at 720 rpm for automahc transmISSIOn vehicles by turnIng the Idle adJustmg Notes a Start the engme and check the Disconnect speed throttle Check IgnItIOn timIng by tImIng The tlnung should be at TDC If the hmmg IS not correct stop the engme and adJust the posItion of IS the Idle 720 rpm for the automatic trans mISSIOn vehicles by turnIng the 12 13 be 7 above becomes about 600 100 to 150 rpm 11 should procedure folloWIng 5 On the automatIc transmIssion 17 mIXture If you set the Idle speed and the nuxture by usmg CO meter b Check the IgnItIOn hmmg The timIng should remam 70 BTDC If the 16 velucles AdJust the engme speed at 700 600 rpm for automatic trans mISSIOn vehIcles at dnve range by the adJust screw SECTION L24 EMISSION CONTROL L24 ENGINE SYSTEM I NISSAN I NISSAN MOTOR CO TOKYO LTD JAPAN GENERAL DESCRIPTION EC 53 CRANKCASE EMISSION CONTROL SYSTEM EC 54 EXHAUST EMISSION CONTROL SYSTEM EC 54 EVAPORATIVE EMISSION CONTROL SYSTEM EC 64 MAINTENANCE AND TESTING EC 66 ADJUSTING ENGINE IDLING SPEED AND GAS MIXTURE EC J TROUBLE DIAGNOSES AND CORRECTIONS EC 74 EMISSION CONTROL SYSTEM L24 ENGINE Fig EC 106 External Fig EC 107 External EC 52 vIew vIew EMISSION CONTROL SYSTEM GENERAL DESCRIPTION There are three to be controlled types of emISSions are 1 Au mJecl10n system A IS Engme modIficatIOn system The control systems 3 Closed type crankcase emISSIOn control system 2 Exhaust emiSSIOn control system Evaporal1ve emISSIOn control and required earned mtervals out to the at recommended reduce harmful gas enusslOns to a exhaust mlmmum system Penodlc servlcmg mspectlOn of these systems should be EC064 Fresh I Au pump 5 2 Carburelor 3 A B valve 6 Servo dIaphragm 7 EmISsIOn control valve 4 Check valve 8 Balance tube Conlrol valve 9 Au gallery pipe 10 Flow gUide valve 11 Rubber tube f EC IOB FI EC 53 EmISSIOn control system 3rr Blow by gas MIXed au or evaporation gas on model 830 series EMISSION CONTROL SYSTEM CRANKCASE EMISSION CONTROL SYSTEM DESCRI PTION Tlus system returns blow by gas to both the mtake mamfold and carbu retor au cleaner A varIable orifice valve feed crankcase mtake IS used to by gas to the Dunng partlal blow marufold throttle operatIOn of the engme the mtake mamfold sucks the blow the through by Normally valve capacIty of the valve handle au IS by of ventilatmg small a Ventllatmg drawn from the clean SIde of the carburetor tube au the suffiCIent to and blow any amount IS gas au cleaner through Under full throttle condItion mamfold the mto the crankcase connection vacuum IS draw the blow valve and the flow goes by the msufficlent flow through through to the the CID sealed system ill the reverse duectlOn In velucles wIth an excessIvely lugh blow by through some tube connection to the the carburetor of the flow will go au cleaner at all conditions year the crankcase or I them out wIth compressed every 12 000 mdes If control system follows enusslOn should be servIced as a hose obstructions 3 all hoses replace au not free WIth a from new one Check the crankcase ventilatIOn If the valve DIsconnect IS control valve for the correct functIOn Check hoses and hose connectors for leaks 2 EC065 Closed type posltlue crankcase ventllatlOn system PERIODIC SERVICE a all Blow by gas tl I f EC I09 FI Once Fresh ZJ It wIth and blow IS a new found defective replace assembly EXHAUST EMISSION CONTROL SYSTEM CONTENTS AIR INJECTION SYSTEM EC 55 Check valve EC 60 AIr pump EC 55 AIr EC 60 AIr injectIon Into each exhaust port EC 56 ENGINE Anti backfIre valve EC 57 Throttle opener Check valve EC 57 Dual POint distributor for EC 57 automatic transmission EC 61 ManIfold heat control thermostat EC 62 EC 57 Hot EC 63 Air pump EC 57 Temperature Drive pulley EC 60 carburetor AntI backfire valve EC 60 Air pump relief valve REMOVAL DISASSEMBLY INSPECTION AND EC 54 gallery pipe and Inlectlon nozzles MODIFICATIONS air aIr cleaner EC 60 EC 60 control of SU type by engine coolant EC 63 EMISSION CONTROL SYSTEM AIR INJECTION around freely rotate SYSTEM PIvot the follow and pm off center the clfcular In the three vane pump bore type the vanes form three chamber m the housmg Each vane completes a shaped cycle pumpmg caVIty through vanes tube connected to the a cleaner AIf alf every revolution of m AIr IS drawn mto the mlet the rotor sealed between the IS and moved mto the compressIOn After compressIOn the outlet smaller cavity a area the The cavity vanes pass sub vanes sequently pass the stnpper a sectIOn of the hOUSing that separates the outlet and mlet cavIties Continuing the cycle the vanes agam enter the mlet to cavIty cycle outlet cavIty spnng flow alf ItS consIsts of IS when pumping located m the preloaded a and pressure seat Its function Fresh repeat The rehef valve settmg plug to reheve the outlet the pressure exceeds alf a preset value EC066 n Burned exhaust gas F EC lIO Air In echon system shoes Carbon from slots deSIgned m to support the the rotor vanes The shoes permIt shdlng of the are vanes and to seal the rotor mtenor from the The clean a alf alf through retor a receIves pump hose connected to attached beneath the carbu flttmg alf mJectlOn vane compress It to produce to type pump draw to au valve check a pensate for shoe operatmg sound The gas from au the pump m marufold pressure mJectlOn pressure moperatlve pump alf IS IS exhaust greater than or m the The mJected mJectlOn nozzle entenng the event case of alf an compressed through an to the exhaust anti backfire valve has sealed ports been Air pump alf pump of IS die cast A rotor alummum alf pump by shaft an alf make up pump The rotor located speed coastmg Controls whIch have been mcorporat rotor steel rmg and bolted ThIS nng prevents from spreadmg at hIgh speed and also posItions and holds the rear bearing and the carbon seal The front vanes lugh the support the exhaust at IS a to the rotor end are used to ehmmate closed cover pump dnve the pump extenor A rotor carbon shoes and shoe spnngs m the poppmg system when the throttle IS plates dnve hub rehef valve and Inlet and outlet tubes vIsible The and end housmg attached to the front of the engme IS dnven belt The rotor three vane a servIce The further to confine the air to the pump cavIties type It IS a pOSItive dIsplacement vane type wluch reqUires no lubncatmg assembly and vane IS flexible carbon seals wluch by also seal off the The wear rotor attached to each end are alf wluch caVIties Leaf spnngs wluch are behInd the follower sIde of the shoes aIr com check valve and m maJumum prevents exhaust An mclude an rehable system operation anti backfire valve and a has flow WIth qUiet operation A fresh alf me from the alf mJectlOn pump IS fresh assure cleaner TIus rotary been desIgned routed ed to on the of the pump IS rotating umt m of the the center belt dnven The EC 55 vanes The front and the beanngs and rotor rear beanngs beanng beanng rear The whIch of two types uses ball beanngs are vane uses uses needle needle bear mgs All bearmgs have been greased EMISSION CONTROL SYSTEM Au pump EC067 1 5 End Housmg 6 10 SIde seal 3 Rehef valve 4 Stnpper 8 Rotor rmg 11 Ball bearmg 12 Pulley hub Needle beanng 7 Vane shaft Fll EC Air inj ection exhaust Fresh ffiJected Sectional Ulew of Olr pump three valve type into each port aIr from mto the ports of the 9 Needle beanng cover 2 Vane the aIr pump IS mdlVldual exhaust cyhnder head located near the exhaust valve Pressunzed through hoses marufold aIr IS transmitted and au dlstnbuhon A schemahc of the exhaust port IS shown ill FIgure EC 112 EC068 Fll EC EC 56 2 Air injectIOn Into exhaust port EMISSION CONTROL SYSTEM In the addition to system mcorporated to mJectIon au controls certalO have been Check valve A check valve reliable system assure located prevents the backflow of the followmg the au valve ot exhaust gas of exhaust gas Backflow one m The lines dIscharge pump operatIon as follows IS REMOVAL DISASSEMBLY AND INSPECTION occurs m cases prevent controlled IS exhaust that time mamfold m nch too to air m The anti backfire valve a mamfold At burn and mJected IS The When the When the spnng of relief valve air dlrve pump belt 2 fads shown m Figure connected to the used to pump 3 4 dIscharge EC070 reduction can also f EC 114 FI the au au pump drIve belt au pump assembly Penodical service No quued fuel mIxture WIll go Ignited or mountmg bracket and DIsmount the Check valve expected properly through the are fresh au temperature backfirIng and at perIodIC mamtenance the slOce bearmgs m IS re the pump lubrIcation free types Every 3 000 mIles however the belt tensIOn should chambers wIthout bemg meet au from the vehicle rapIdly evaporated cylinder some contn emISSIOn combustIOn the to remove IS If the valve does not work the bar adJustmg thIS By burmng fuel wlthm the be belt Remove the bolt seCUrIng the pump mlet the to au adJ ustmg bracket Ime and outlet to the mtake manIfold butIon to Disconnect the hoses from the pump EC 113 valve au Removal I of the anti backfire anti backfire Air pump pump housmg cover 2 Remove the bolt secunng the prevent backfire schematic A I fads supply of aIr mto the mtake thereby malang the au mIXture leaner to valve to the mtake IS before at the the exhaust mamfold proVIde unaVOIdable thoroughly mspect mtake used Ignites when combmed with the system removing of deceleration the mIXture IS by IS system backfire duratIOn Imtlal and vacuum remove When the removal IS Anti backfire valve This valve not exhaust emiSSIon control however mamfold do Pnmardy be and mspected adJusted hIgh wdl result Disassembly Air pump relief valve The au mounted au pump valve IS the dIscharge cavIty of the and accomplishes the fol m pump lowmg relief functions wIthout effectiveness of the exhaust affecting emISSIOn control system i MinImiZeS J 1 Remove and remove 2 Secure a VIse and as remove Note pulley drIve bolts pulley from the hub four the the au shown pump dnve hub m m FIgure EC 115 four end Never clamp cover on bolts the aIurnmum housmg exhaust gas tempera ture nse 2 Mlmmlzes suiting EC069 FI EC 113 f Anti backfire value from horsepower au mJectIon exhaust system 3 Protects the pump from losses Into re the excessive back pressure f EC 115 FI EC 57 Remoumg cover EMISSION CONTROL SYSTEM Remove 3 the end by care fully tappmg surroundmg of the a dowel wIth pm large plastIc mallet and hftmg up straIght cover 10 the 4 Put match marks 0 be No further dIsassembly should attempted Cleanlng lnspectlon lubncatlOn the on rotor rmg and sIde of rotor to ensure correct reassembly and remove SIX that retam the rotor nng to screws the rotor specIal a usmg hexagonal Cleaning wrench tool STl 981 0000 Clean hub f EC 117 F Note match Generally mlhcated rotor by on marks RemOVIng rear rotor bearing 7 Remove 8 Remove tweezers f EC 116 F Remove vanes from the rotor three sets of carbon two sets or vane type needle usmg nose a pan of phers RemOVIng rotor rIng Fig EC IIB RemOVing carbon shoe the rotor nng and SIde carbon seal from the rotor the three vane type If It IS replace the rear bearmg It may be pressed out of rotor ring on a press usmg a support for dlsassembhng rotor ring and attachment for pushmg out needle bearmg necessary to SpeCIal 9 In the three If It IS valve vane necessary to type replace pulhng aIr pump the rehef out rehef bridge for tool STl9850000 and special standard puller use valve tool Support for dlassembhng rotor nng STECP STl9820000 Attachment for pushmg out needle bearmg STECP STl9830000 Note carbon dust from pump with rotor assembly Note Do not use vane Remove housmg compressed and aIr both rotor nng and for the two In and solvent the manufacturer of carbon shoes and two shoe springs 6 bearmg rear bearings are shoes and three shoe springs 5 the with Support rotor nng carefully to f EC 119 F aVOid dlStortton RemOVIng relref valve EC 58 air pump pump mner assembly cleaning housmg solvent and on rotor EMISSION CONTROL SYSTEM a 0 if 0 w 0 i 1 8 00 a I FIg EC 120 Components of three value type scormg a all Inspect wear parts or for cluppmg damaged parts must be replaced ensure qUIet and efficIent oper Place the clampmg especIally SIde carbon scored replace wIth a new one If vane seal IS an pump housmg the pump dTlve m a 2 Assemble shaft special meter vanes correctly of 0 3740 mch vane hub bearmg with grease such as ESSO ANDOK 260 The b on vanes ten mdes dia the event tool STl9860000 may reqUIre wear m five to running time sltght squeakmg a In stdl persISts dnve the vehicle about 40 for the SO to type Carbon dust may be present m the housmg and IS usually an mdlcatlOn of normal Pack the high meltmg pomt hub between Jaws dummy atIon three I VIse roughness All to Notes Assembly of air pump InspectIon air pump In most cases fIve to mph ten mdes wear m will be suffiCient for wear 4 Insert one carbon shoe Lubrication SIde of every vane The rear bearmg and vane hub beaTIngs must be lubncated wIth a ugh meltmg pomt grease such as ESSO ANDOK 260 or eqUivalent Grease each beanng to msure adequate Note lubncatlOn Note Place vanes are vane IS do not 5 sure With the that so Insert deeper shoe must each be that chamfered end of shoe faces to Vane assembly mto rotor three vane type make for service Beanngs already packed WIth ugh meltmg pomt grease 3 carbon posItioned EC074 FlEC 121 Each on vane the shoe spnng mto each shoe slot one agamst housmg stnpper and remove the dummy shaft at Note When posItioned sprmgs are properly the curved portIOn of spnng Will be agamst the shoe and tlus tIme EC 59 EMISSION CONTROL SYSTEM the opposite sIde wdl be agamst wall ofshoe slot adJustmg 2 6 In bearIng the three vane type was removed may be pressed attachment a about 00315 disassembly needle PosItIon so 8 PosItIon the rotor f1ng sIde seal new on check the valve operatIon mspect all hoses and hose the marks 0 that Remove the check valve from the tIghten vanes and msert dummy vane Do not force will dIstort II of Be careful not to No further shaft mto vane cover on smce 3 Remstall reverse Note cover First end cover of the posItIon temporarily tIghtenIng to the dowels set by adJacent retIghten all bolts and then head the to damage the msassembly the check applymg screwed the portIOn Check the gallery and leakage Clean At the nozzle air or a wue tIme the of nozzle nozzle and mJectIon mJectIon nozzle to the au brush mstallatIon seat the on tIghten the air torque of 41 to a 55 0 ft Ib Hold the au aIr should valve m mJectlOn hexagon tIghten the flange screw gallery to a torque of 36 to 7 Check the cylmder head be done vane Install the end 4 with nozzle mJectlOn shaft from other several tImes 6 b and bearIngs andf or vane bearIng ahgnment the gallery pIpe holdmg the flange gallery pipe with a wrench a materIal to screws damage mJectlOn nozzle au cyhnder 011 assemble them to 22 to 36 ft lb bearIngs It lockmg retammg Remove the 10 hose supply gallery pIpe thread rIng air Note rotor rIng and side on the engme 5 2 of rotor lme up Unfasten the from mJectlOn nozzle with DIsconnect the au 3 for fractures 1 rotor that holes me up so above during Be careful not to After Check valve au rIng Apply done be mstallatlOn Its dIstortIon 7 rotor should on prevent screws the parts STI9840000 lettered end of only beanng surface and support od to the When removmg the antI backfire valve disconnect the hoses No further m engme tunes work connectIOns for leaks Press rotor rmg to 9 pulley Apply several Anti backfire valve and the attach b bearIng mch below rotor rIng surface Note a Remove the drIve If rear new pressmg bearIng special tool The bearIng should be Note mg bolts mto rotor rIng usmg for bar nut and bolt to reheve the belt tensIOn and a nozzle wrench and of the head gallery au air 43 ft lb au for leaks wIth the engme runmng sequence of removal TJgbtemng torque 65 to 76 ts ft lb After 4 valve aIr mstallatlOn check the hoses and hose connectIOns for leakage ENGINE MODIFICATIONS the four bolts Throttle opener TIus Reinstallmg the air pump Remstall the air pump sequence of removal AdJust the belt tensIOn 0 5 has about Air m reverse so that It mch of slack under result fore sequence of au about pump removel followmg pomts AdJust the belt has 0 5 IS reverse notmg the tensIOn so that It mch of slack under Drive pulley Loosen the air pump au exhaust manIfold the pIpe willch could fractures or leakage the removal of the au There gallery pIpe and mJectlon nozzles should be done only when they I au 2 are damaged LubrIcate around the the gallery With Hold the au connectmg inJectIon nozzle and engme 011 head unfasten the flare au WIth a screw f9nnlC gallery to mJectIon au gallery Remove the EC 60 nozzle wrench and tmg nozzle dIaphragm whIch controls buretor throttle valve the m car response to control valve operatIOn Thts engme modIficatIon system has vacuum been deSIgned so that HC emISSion IS reduced when engme brake IS apphed The control valve self contams an altItude compensatmg deVice so that the control valve also operates cor rectly rare inJectIon air hexagon the supply the bendmg m portIon of thumb pressure I from gallery engme modIfIcatIon system of a vacuum control valve whIch detects negatIve pressure of the mtake mamfold and operates the servo It IS very dIfficult to remove the Without the and inj ection nozzles thumb pressure Remstall gallery pipe consIsts at a illgh and land where the characterIstIcs of au IS tills control valve allow the control valve changing ure the m ItS operatIng negatIve pres approximate proportIon to atmospherIC Figure EC 122 pressure Refer to EMISSION CONTROL SYSTEM Vacuum adJustmg 1 screw 2 Vacuum control valve 3 Allitude corrector INTAKE 4 Servo diaphragm 5 Carburetor throttle plate MANIFOLD 6 Opener adJustmg screw ECD71 Fig EC 122 Dual point distributor for automatic transmission The automatIc transnusslOn vehIcle produces exhaust gas volume m the manual transnusslOn vehIcle than For does vehIcle tlus the reason IS used helps the m usual reduce the apphcatlOn and of harmful emISSIOn pollutants to a mlllimum The follow mg table shows outSIde temperatures and the apphcatIon of the two spark tnmngs former IgllltlOn Tll1lmg compelled to provIde a decreasmg the concentra of exhaust pollutants It follows IS Temperature SWItch of means tIOn more optrmum engme performance at low temperature The retarded pOSItIOn Engme modifICatIOn system 520F Retarded above Advanced below 300F OFF from the above consideration that the automatIc transmISSIOn vehIcle should have retarded more spark tumng Igmtlon SWitch than the manual transmIssIon vehicle should It should also have advanced dnveablllty low at To dlstnbutor normal to spark tImmg assure T ambIent tem peratures To the these two satIsfy 1971 employ engmes butor and slnular m to that structIon Dlstnbutor Advanced breaker pomt URetarded breaker pomt Temperature sensmg SWItch requuements later a ON L24 model dual pomt dlstn design and con mtroduced the m Ll6 engme I The dual pomt dlstnbutor provides two spark tll1llngs advanced and retarded The system consists of dlstnbutor a relay and pomt temperature ference degrees these two tnmngs of crankshaft rotation m advanced earlier sWitch sensmg tll1llng tumng m IS IS The cycle for II c 0 i r Ij 10 gIVe lr U k II 1 Dtf to used the a a c l iI 1 M J J 0 2 t Relay EC 61 r Fig EC 123 SchematIC drawmg of control system for L24 engine with automatic transmISSIOn EMISSION CONTROL SYSTEM Note OperatIon of the by hysteresIS sWitch affected It closes at IS of the bI IS It opens at 520F when tem 3Ised from low to high perature is I metal to low hIgh turned off at 570 is 340F when temperature lowered from that the switch IS It mdIcates stilI semceabIe Allowable variatIon of thIS SWItch IS Wlthm 5 degrees 20 20 15 15 If the swItch u I U I l 10 10 bll Q Q 5 5 o o o 5 10 15 Distnbutor rpm x 20 8 10 12 14 102 16 18 Vacuum In Hg Frg EC 124 DIStributor advanced charatanshcs Manifold heat 5 6 7 control thermostat Marufold thermostat IS mstalled on the 1972 models mg TIus deVIce operates m the follow that IS the engme IS manner qUIckly coolant warmed up m carburetor perature thIS when at and the mtake IS kept vanous III constant vehIcle thermostat coolant then the mamfold and IS tem speeds shut temperature IS down above 1500F Then stopped the III flow of coolant IS the Illtake mamfold lme 1 Frg EC 125 EC 62 Case 2 Erlng 3 Valve 4 Spring 5 Pellet 6 7 Supporting case Adjusting nut 8 Case cover Manifold heat control thermostat EMISSION CONTROL SYSTEM J when the ambIent temperature IS very low ThIs closes the llllet port and Hot air type air cleaner The vehIcle has cleaner wIth a a admIts hot aIr type manual hot air air valvmg mlet port of the cleaner The valve IS set m the wlllter pOSition the at hot mamfold startlllg aIr around thereby ill the the iaJCiii o 1 1 I i 9 r r posItion summer J IJJ r 7Vk f air J enters the cleaner when the valve IS set ill J 1I lie i i 7 Lv YW C r j 3 cold OutsIde t 1 exhaust facllltatmg cold weather i c 0 I St 1If 1 ILJ 1 Fig EC 127 SWltchmg for wmter summer and starting Temperature control of SU type carburetor by engine coolant On the SU type carburetor flow rate of fuel vanes wIth a the change the temperature of gasohne which IS largely affected by VISCOSity van atlOns The carburetor IS heated by m ThIS only rate nearly keeps regardless of ambIent temperature engllle coolant vanatlOns to I Au 2 control valve Valve to Fig EC 126 I Hot air type air cleaner not but also contnbutes much lffiproved atomlzatton mto the mtake system A small sIZed thermostat was au em to control the flow of coolant ployed lever deSign constant flow a prevent detenoratlOn under hot weather Radlafor Water mlet 3 T housmg 4 Intake mamfold 2 5 Water outlet 6 Carburetor E con 7 Carburetor msulator 8 ManIfold heat control thermostat Fig EC 128 EC 63 a Coo ant passage EMISSION CONTROL SYSTEM f C EC073 FIfJ EC 128 b Coolant passage EVAPORATIVE EMISSION CONTROL SYSTEM CONTENTS DESCRIPTION DESCRIPTION When the vapor vent lIne and ThIS system followmg I Fuel IS composed 3 4 of the four basIc elements tank wIth poslllve sealIng filler cap 2 FLOW GUIDE EC 64 Vapor lIqUId separator Vapor vent lme Flow gUIde valve fuel tank engme vapor at IS the rest lIqUId separator filled WIth evapo are ratIOn gas produced fuel tank A flow m the closed gUIde type valve opens VALVE EC 65 case mamfold cleaner lIqUId separator becomes Hg The gas passed through gUIde valve 2 IS stored fuel crankcase Once the operatIon evaporallon EC 64 mto engme gas m the starts crank and carburetor au sucked mto the mamfold for comb us lion When the pressure of the closed type fuel tank vapor when the gas pressure exceeds 0 4 mch the flow are and vapor vent lme negallve by decreasmg the the flow gUIde valve I opens to send fresh au from the carburetor au cleaner to the fuel tank EMISSION CONTROL SYSTEM Carburetor Vapor IJquul separator Evaporation control tube To rocker 1 From carburetor an cover cleaner From fuel tank 2 To crankcase I Float chamber EC075 FIlJ EC 129 EuaporatlVe FLOW GUIDE VALVE TIus reverse valve operates flow of blow crankcase TIus by valve to i prevent gas from the IS mounted the engme compartment The letters A F and C are engraved m 0FRO I lIlSlde the body of the valve mdlcate the connectIOn of the vapor vent me t I ARBURErOR AIR CLEANER FROM FUEL TANK 1fG TO FIlJ EC 130 Flow EC 65 C guule CASEJ valve emISSIOn control system EMISSION CONTROL SYSTEM MAINTENANCE AND TESTING CONTENTS GENERAL MAINTENANCE EC 66 Functional inspection of throttle opener Carburetor EC 66 Dlstnbutor EC 66 EC 66 at first 600 miles and every 12 000 miles AltItude adlustln9 of throttle opener at every 12 000 miles EC 66 Testing EC 66 I nspectlon of manifold heat control EC 67 thermostat Spark plug HIgh tension Battery cable Air cleaner element CRANKCASE EMISSION CONTROL SYSTEM AIR INJECTION Testing Testing Testing ENGINE SYSTEM of spark EVAPORATIVE EMISSION EC 67 SYSTEM of antI backfire valve EC 67 separator and vapor of pump EC 67 Checking MODIFICATIONS EC 68 of fuel tank of flow vent gUIde line EC 70 valve EC 71 Use that exhaust tension cable mamtamed at a low level It an ance on emIS Itquld vapor High sure ohmmeter to check reSISt secondary cables DISconnect spark plugs and remove cables from IS recommended that lllspectlOn be con ducted every 12 months or every dlStnbutor cap 12 000 mdes not wlllchever occurs Best engme operation and exhaust emISSions will be through penodlcal fIrst and ChecklngofdlStr butor breaker POint gap Check the choke settmg and adjust speCIfIcatIons as required Proper carburetor Idle mlxture ad Justment emiSSIon IS imperatIve for best exhaust control Refer to the artIcle gIVen tmg IgmtIon tlmlng and speed and mIxture m adJustmg cables Do plugs m a sand Inspect spark plug Make sure that they are of the specI fIed heat range Inspect msulator for cranks and chipS Check both center and ground electrodes If they are excessIVely worn replace WIth new spark plugs File center electrode flat each Set Set the gap to 00315 to 0 0355 mch Idle by the use Spark plug of a proper should be spark plug SIde and the correspondmg electrode mSlde the cap If the resIStance IS more than 30 000 ohms Spark plug Remove and clean to the secondary remove termlnal on the F EC 131 g blast cleaner Carburetor dlstnbutor to cables from the cap Con nect the ohmmeter between the cable obtamed mspectIons from WIth the gether mllllmUm from recommended semcmg at these mtervals EC 70 CONTROL EC 70 Checking MAINTENANCE sIons engine coolant EC 67 GENERAL are EC 69 EC 69 Temperature control by EC 67 To make EC 68 advance control system of check valve aIr EC 68 remove the cable from the cap and check the cable resIstance only If the resIstance IS stIli more than 30 000 ohms replace the cable as sembly adJustmg tool replaced every 12 000 mIles Distributor Check the I 1 dlStnbutor breaker pomts for abnormal plttlllg and wear Replace If necessary Make sure they are tdCt m correct for full g EC 133 F J tensIOn grease pomt dwell and gap are Clean and apply dlstnbutor to the pomts should exceedmg carn be and Wick replaced 12 000 mdes Measure speCIfIC gravity of electro lyte WIth an accurate hydrometer SpeCIfiC graVIty should be 1 220 or Breaker at llltervals Checkmgofh gh cables Battery con and that correct not ahgnment t g EC 132 Checking ofspark plug F pOint gap EC 66 more water at the standard Add mlneral free dIstIlled water as reqUIred to EMISSION CONTROL SYSTEM bnng electrolyte up to proper level Clean battery nals After tlghtenmg battery posts and clamps slIghtly umt as a posts and cable termI clamps coat the with grease to retard corrosIOn functlOnmg properly IS DIS connect the anti backfire valve vacuum sensmg hose and hose from mtake mamfold at the anti backfire mamfold connector to valve Insert Plug air supply hose at the Plug the preclude leak the anti backfire valve vacu sensmg hose to close the passage to the mtake mamfold A IS After um ly The paper element has been speCial treated and therefore there IS no need to replaced clean It But the normal engme remstall all the A I S parts checkmg operatIOn the valve If au felt 5 of check valve This test EMISSION CONTROL 1 SYSTEM reaches normal I Check hoses and hose connec tlons for leaks 2 all DISconnect them out WIth compressed If any hose obstructions 3 hoses and blow can not replace be cleared of a new one of the crankcase venttla Testmg WIth engme runmng at Idle remove lussmg nOise will be passes through the valve a ately valve mlet If valve attempt new m to fmger a IS necessary IS IS clean It valve Check for before backfire IS seat Insert placed clogged do not Replace WIth a deposIt cloggIng the hose Clean If necessary the valve check valve and plate It should freely ongmal pOSItIOn agamst the valve seat when released 5 engme speed Slowly mcrease the to 1 500 rpm and watch for exhaust gas leakage at the check valve There should not be any exhaust leakage The valve may flutter or Vibrate at Idle If engme Idle abnormal bUrnIng even smce I Operate tlons air gallery speed but tlus IS normal pulsations m the mam mjectlon fymg that the the exhaust are vanous ennsslOn 3 replace It Check the tensIOn and air Testing anti backfire valve agnOSIS of the exhaust control system I Operate the engme until It reaches normal operatmg temperature 2 Inspect all hoses and hose connec It must be determmed that the engme tlons for ObVIOUS leaks perfomung are performed any extenslVe dI EC 67 and correct If It arr pump belt speCIfications 1f necessary 4 DISConnect the au supply hose at the check valve 5 Insert the open pipe end of the adapter specJal the air supply hose Clamp the hose securely to the adapter to prevent It from blowmg out PosItion the adapter and test pump test gauge that the m blast emItted through the drilled pipe plug harmlessly dlSslpa ted engme and all components must be at normal operatmg temper the tests to gauge The Pnor to mJectlon adJust components of of the checkIng control system operatmg properly atures when the recommended condItions until pump 6 If the check valve does not meet pump emgne for leaks and correct SYSTEM re It never comes out before tool STl9870000 are re reaches normal operatmg temperature 2 Inspect all hose hose connec fold or ven should be If there eXists after the AIR INJECTION followmg procedures checkIng and It while runmng arr The speed In case of Idle racmg anti backfue valve cannot be consIdered due to exhaust commended for mlet the valve function and correct 1f necessary Leave the hose wsconnected and start the engme au air the valve and the the on mto replaced pump at the antl Testing of air probe a return to the over the dlstnbutor mamfold depress a from away not IS two Note If VIsually mspect the posItion of the valve plate mSlde the valve body It should be lIghtly posItioned agaInst valve than hose to mtake air the air flow aIr placed the valve checkIng more the valve mam functlOmng properly not felt or the valve should be Connect hose from 3 heard should be felt unmedl when It for obvIous leaks and correct connectIOn strong unttl engme IS changes excessively tors ventilation control valve If the valve vacuum at the operatmg temperature Inspect all hoses and hose connec the venttlator hose from the crankcase air the Operate 4 as performed pump test 2 the tlon control valve workmg air the hose m mamfold and dISconnect the operation air With be can tune as the flow IS contmuously seconds same plug securely Open and close the throttle valve rapIdly If au flow IS felt for one to two seconds by a fmger at anti back every 24 000 mtles CRANKCASE SUitable 4 fold Testing a and fasten It fire valve outlet to the mtake should be It the antl checkIng backfire valve operation 3 DIsconnect the air mtake mamfold connections age Air cleaner element before necessary 6 so Install a au tachometer will be on the WIth engme speed at 1 500 rpm observe the pressure produced at engme the test gauge Au pressure should be 0 63 mch or more Hg EMISSION CONTROL SYSTEM 7 If the the above 3lf pressure does not meet proceed as fol pressures lows 1 Repeat 2 and 3 above 2 DIsconnect supply hose at the anti backfire valve Plug the au hose ope rung and screw with a clamp Repeat the pressure test the au 3 Check the filter element 4 With engme speed valve Ing or 5 au IS felt at 1 500 rpm by fmger the rehef valve IS by or at the rehef malfunctIOn The rehefvalve should be replaced repaued If the not meet the Increase the eng111e speed once up applY111g load and release the accelerator lmkage from holdIng With hand qUIckly 2 The servo diaphragm operates once the at the full stroke 0 1969 mch stroke speed 111JectlOn pump does requuement of mmlmum the pressure test It should be returns lowers gradually and when the as the speed replaced In the event of the follOWing cases replacement of parts concerned IS reqUIred Fust perform adJustment m ac cordance or WIth the penodlcal 111spectlon 4 In the case mstructlons and 5 In servo the the servo not fully Control valve operatmg nega tIVe pressure IS too ugh high boost Altitude adjusting of thottle opener at every 12 000miles as valve changes descnbed operatmg negative Justed phragm operates contmuously and speed does not lower or tune requued In lowermg speed from 2 000 rpm to 1 000 rpm IS too long SIX seconds or longer and speed does not return to the Idlmg speed tunely dIa servo stroke tude dIa the phragm operate or dIaphragm operates but does Control for that case does not pressure adJustment that the Control valve operatmg nega tIVe pressure is too low low boost Cause Idhng speed the opera tion will be released completely 3 It IS normal that tune requued In lowermg speed from 2 000 rpm to 1 000 rpm Tn 111 FIgure EC 136 IS approxunately thtee seconds adJustment au Cause returns to the close the hole of the test gauge fmger If a leaking sound IS heard leaking 1 to 2 000 rpm Without should operatmg negative response to altI prevIOusly Hence m pressure to be ad change m response to atmosphenc pressure the altitude the of the dnven place FIgure where the veIucle IS EC 135 mdlcates rela tionshIp between operatmg pressure to be adJusted and altitude atmosphenc pressure Fig EC 134 Testmg ofrehef 29 ualve A 21 28 bQ I 20 27 ENGINE MODIFICATIONS I bO I 5 J 26 19 e 0 Functional inspection of throttle opener i5 j bQ S 25 18 E 0 bQ at first 600 miles and every 12 000 miles The control valve operatmg nega precIsely adJusted when tive pressure IS 0 E 17 24 0 0 16 23 and therefore plant sJupped no comphcated adJustment IS required normally Normally It Wlll be sufficient to conduct the followmg 111spectlons Mter completing the adJustment of Idhng speed WIth the engme whIch IS perfornung au 111jectlon from the 5 j 15 0 10 20 30 40 AI11tude Fig 68 EC x 50 60 70 102 ft EC 135 Operatmg negatIVe pressure of control ualve EMISSION CONTROL SYSTEM How to read the EC 135 Figure I J When the o the place known IS tive o pressure of where the vehIcle IS dnven atmosphenc read the operatmg nega mark A When the atmosphenc unknown read pressure IS mark arrow from the altitude ofthat place adJustment m accordance WIth the followrng mstructlons WIth the engme for wluch Idlmg speed adJustment has been completed and wluch IS performmg all mJectlOn I and Connect gauge to the a vacuum When nomena nomena phragm damaged that the marufold Make sure control marufold vacuum dIaphragm and that the servo dIaphragm operates once at the full servo stroke 0 1969 mch Thereafter both fold vacuum and speed decrease two seconds are or maru when one to both of them elapsed stop lowenng Figure EC these phenomena 136 nals 2 shows pressure ofthe adJustments confIrm operatIOn through conductmg routmg mspectlOn and requlled tune measure s m to rpm load make See ground of Figure EC 138 nnii lowermg speed 1 000 rpm that from EC051 WIthout less than 6 seconds IS FIg EC 138 Measurement oflJoltage In case the 3 tlung 4 the lead Disconnect must voltage IS zero some be wrong WIth the relay which must be replaced system Wlfes from In case I2V mately the voltage IS somethrng must the temunal of the dlStnbutor and With connect the ammeter between the lead whIch must be replaced temperature sensIng approXI be wrong SWItch for the retarded breaker pomt WIre and and relay between termmal voltage the sure ground 2 Set the Igrutlon Make key m the ON not start the engme sure sure Inspection of manifold heat control thermostat Troubles that the ammeter mdlcates Defects about 3 amperes thermostat m marufold heat control can cause operation such c I the the advance control 1 correct condItions are m terrrunals or Testing of spark make E 0 they If and relay termI loose dIa that the temperature sensmg SWItch IS ON and the room temperature IS above 520 F Then c Check whether or not are Upon completIOn of the above 3 l 1 step con damaged or servo erroneously adJusted IS IS pOSitIOn Do E l the ammeter indicates dISconnect vacu valve operates the IS transferred to the 4 phe descnbed applymg speed once up to 2 000 rpm WIthout applymg load and release the accelerator lInkage from holdIng by hand qUIckly RaIse the case zero 10 st1ll cannot be IdentIfied the trol valve 6 In I descnbed cannot be IdentIfied dnve the operatmg negative 2 nses above the actually and perform coastmg The phenomena w1ll be verIfIed more practically When actually dnven and such phe 2 000 um nega from the Figure EC 135 connector AB valve 3 operatmg vehIcle When operatmg negative pressure to be adJusted IS known conduct rnspec tlon that the so tive pressure meets the value obtamed arrow operatmg negative by folloWIng pressure B by followrng pressure correctly unproper engme as Cl c w e Kept closed 2 000 gpo The temperature of carburetor and nse whIch m 0 00 oll 1 mtake mamfold do not 000 cold weather may cause heSItation and backflle EC078 FIg EC 136 5 ManIfold called vacuum Operatmg negative Loosen the adJust at that tune the lock vacuum screw adJustmg IS pressure 2 and screw 1 Kept open Igml10n coll E C050 In occur FIg EC 137 Testing of spark adoonce control system EC 69 stable tion hot weather m percolatIOn the carburetor causmg Idlmg may un and heSItation at accelera EMISSION CONTROL SYSTEM of operabon Checkmg filler cap Low pressure au Breathe out J r DISConnect the vapor 2 vent lme connectmg flow gUIde valve lIqUid separator 3 Connect manometer 3 way a and valent 3 way a COlillector cock change to vapor or an cock a eqUi to the end of the vent lme Water 4 vent Supply fresh lme through aIr mto the vapor the cock httle by httIe until the pressure becomes 14 5 mchAq 5 ManIfold sIde Shut the cock Mamfold heat cOntrol thermostat heIght 7 of the lIqUid FIg EC 139 Check ofmamfold heat control thermostat 8 zero m a Immerse the thermostat nunutes and blow ill hot a few above for or low pressure ill aJf from the sIde adverse to 1 5 to 3 pSI EVAPORATIVE EMISSION CONTROL SYSTEM and meausre the the manometer remam Aq When the filler cap does not close completely 1 m VanatlOn of height should Wltlun I 0 mch water of I750F completely leave It that way 6 After 2 5 mmutes 9 the heIght should When the filler cap and the drop to short tune height short tune ill a stu ffy hose does not It IS the IS removed drop to zero cause of the the mamfold LIttle or no bubbles from the fold sIde illdlcates 2 IS When unmersed normal that the the thermostat mam normality ill arr cold water It passes through easily If operatIOn IS Improper replace a new thermostat assembly Wlth Checking of fuel tank vapor liquid separator and vapor vent line Check all hoses and fuel tank Note When the vent hne IS stuffy the breathmg m fuel tank IS not thor oughly made thus caUSIng msuf ficient dehvery of fuel to engine or vapor lock It must replllled or replaced therefore be Temperature control by engine coolant 1 Before removillg the carburetor carburetor msulator fold for to one dram coolant of US gal or reason or mtake mam another be sure approxImately the radiator m Manometer CautIon Vapor liquId separalor Failure to foUow thIS rule may cause coolant to creep mto the cylinders medIately and run to tures housmg occur Im spark plugs the until the is removed The thermostat 2 ed this the starting motor thoroughly the cyImders coolant from Should remove IS Flow gUIde valve factory adJust the predetenruned tempera Do not remove It from ItS unless absolutely necessary EC029 FIg EC 70 EC 140 Checkmg of euaporahue emiSSIOn control system EMISSION CONTROL SYSTEM the valve should be replaced But when Checking of flow guide valve I arr blown from crankcase sIde IS should never From carburetor It Imes 1 DIsconnect flow gUIde 2 mto all hoses from the 3 From fuel tank While guIde valve Wlule lower pressure arr IS pressed the flow gUIde valve from the ends of vent Ime of fuel tank SIde arr should go through the valve and flow to crankcase sIde If alI does not flow SIde and cleaner arr flow to other two vent arr IS pressed mto the flow valve from carburetor alI cleaner flows to the fuel tank SIde It crankcase SIde or 4 Tills opens sure IS To when the crankcase mner pres 04 mch unproper or Hg When operatIon IS breakage eXIsts replace It E C030 ualue Fig EC 141 Flow guide ADJUSTING ENGINE IDLING SPEED AND GAS MIXTURE 3 Loosen the balance flISt Idle settmg Note Make R F front sure carburetors and the screw completely screw and rear disconnected are L r I i r I I 0 Sf 0 s J l I j r I r l J il J L f mj 1 1 1 jj Frg EC 144 Loosening the balance screw 4 It IS absolutely the veillcle for Vacuum adJustmg screw 2 Lock screw 6 Servo dlapluagm 7 Connector A B valve 11 3 Control valve 8 AUXlltary throttle shaft control tube valve 9 Vac 13 Opener adJustmg 14 Balance screw 5 Vac ervo dIaphragm tube 10 Throttle adJustmg shaft 12 Au cleaner screw 15 au horn Fast Idle settmg 1 ton Remove the damper by fmger suctIon 2 MS pIston Check 20 or arr cleaner cover EC079 be raIsed level lOW 30 and add which the vehicle is dnven or 5 011 the engme Connect to 700 rpm If msufficlent sure the on adjusted season m summer winter SIde and the tlffilng hght 6 AdJust engme Idlmg smoothly IS in accordance WIth the and ralse can oil make procedure cleaner mtake nozzle arr screw thIS that the HOT COLD valve the suctIon PIS and make sure that the cap In Note screw Frg EC 142 Carburetormkage 011 than 20 mmutes about 30 mph for warmmg up 1 4 Connector control valve Throttle necessary to dnve more adJustmg turnmg tachometer speed to 600 F and R throttle screws Notes a When the engme beIng adjusted idle Fig EC 143 CheckIng damper 011 level EC 71 settmg screw the has factory Idhng speed IS do not touch fast screw already because been thIS adjusted at EMISSION CONTROL SYSTEM Notes engine speed becomes unstable durmg idling speed unbalancing the R carbu operatIon between F and retors If adJusted by the fast Idle The settmg fl 0 J a J I Y J 7rJt The flow meter V the flow meter be used for A Z penod should It screw l EC 147 Throttle adJusting Fl Idlmg speed c 750 rpm Reduce engme Idling the extent that engme b stably When throttle c turned screws is adJustmg throttle clockwise WIthOut valve Apply au horn @ofthe au au flow adJustmg screw upper end of the float m i l f l w 7 J iils t r 1 1 r 1 1 L r i Y 1 k r h f 1 v Y 5 J J r rj j iJ1 l I f j cleaner turn ahgn the the glass tube l t l1 r J 0 K 1 r i I J @ screw such screws @ screw must as and have been tJgh tened excesSlveIy or the acceler ator lInkage must have been ad justed incorrectly Under the nor mal conditton the auxiliary throt tle shaft l I t balance @ and throttle shaft 11 a slight play dunng engine operation under the Jdling speed In other words the auxiliary OJ r S throttle shaft VIded with i o If and be reduced below 750 rpm should have r n more adjusting during the above engine speed can adJusting opener adjusting to the scale 1 or throttle the other flow meter to the front SIde the opens not transnusslOn 7 condo idlIng to race the engme be is returned adjustment at TDC a sure d When 600 rpm automatic in adJustmg When screw speed to operates very forehand at 50BTDC transmiSSion a to two be used contmu not ition for 1 to 2 minutes make Idle setting screw FI EC 145 Fast f one onsIy L24 engIne standard WIth manual of time seconds J i nsed to hinder the engme from mtakmg au and therefore It IS recommended that short Ij IS IIf p q 1 3 screw b v screw Stand the flow meter float vertI cally 1 0 r Fast Idle settmg i c responds J as a @ play should be pro 0 whIch to the clearance Ta cor Th shown in FIgure EC 149 f f EC 146 Idle FI ut nuts ad f EC 148 Settmg flow meter FI SU carburetor Front SIde Throttle shaft TA Fig EC J49 EC 12 EC081 lb Justmg Ad Idle speed and mIXture EMISSION CONTROL SYSTEM 8 Then rear side Do not apply air horn move flow meter to the a @ of the the all of the flow meter screw float meter front not IS cleaner adJustmg If the flow alIgned carburetor scale carburetor throttle air flow turn adJustmg wIth the the rear screw and the float wIth the front carbure alIgn control valve Apply diaphragm mamfold boost to the servo And then confirm that the engme @ Idhng speed rpm 12 Use balance 1 200 to @ properly screw IS nearly IS flow meter and a and front volume tor scale @ connector I 400 so time IS obtamed air Justed 14 Do the j1 with the openmgs of F and R throttle valves b same The above mgs are even Ji throttle valve open and the air flow IS stops at the same 1 r f 1Jj q If also uniform when the pOSition of the float m the glass tube of the flow meter 1 A D l iL 1 j Nr Kitllt I @ c POSI ti lr tJ 11 I tion for both F and R carburetors t screw the opener adJustmg that the engme speed IS rpm under the condItion de AdJust screw @ so I 400 scnbed above 12 paragraph m speed IS not I 400 15 diaphragm vacuum tube ongmal posItion If CO meter IS avauable not adJust Idhng by turnmg the Idle adJust nuts m the procedure as descnbed m paragraph I tlus AVOId and F however measures neceSsary Idle TIghten R rdJustmg of nuts carbuletors Then completely upward loosen the above nuts wIth 3 turns the Igrutlon tUlling to 50 With automatic transmission Note AdJust adJust It that the sure to the control valve connector and servo I BTDC dia con the unless absolutely FIlf EC 150 Sethng low meter make to the IS If the engme @ tube both 9 and @ tube con servo I 400 rpm ReadJust descnbed m paragraph 13 IS to the FIlf EC 152 Balance from the engme speed IS m order reconnect the servo dIaphragm vacuum @ I 13 @ speed rpm If diaphragm servo once vacuum engme above ad fueI mIXture reconnect the nector ment 4 @ tube phragm properly atr proper DIsconnect the nector a a factory ratio at vacuum balanced Notes for CO level speCIfIed Each carburetor IS Note that the carburetor mtake rear untu the a the adJust 1 8 turn at them clockwIse turrung Nozzle head to TDC 0 04 mch falls from Jet bridge wIth idle adjusting nut return of one 2 TIghten the F and R Idle adJust simultaneously by approxI 1 8 turn and stop the nuts at mately the pomt where engme speed IS the mg FIlf EC 153 Opener adJushng screw once speed the race And 3 000 rpm engme the adjusting Before speed to engine engme raISe at the agam fastest and stablest condItion 1 400 rpm 10 Justed When the and engme repeat above II Igmtlon tlmmg m speed the adJustments paragraph 7 Disconnect the IS IS ad changed descnbed control 06 to SIon stnctly IS Important I 0 to I 6 for automatic transmIs 1 2 models IS by connectmg the valve tube@ from the control valve connector @ and connect the servo dIaphragm vacuum tube CID to the vacuum that CO level It usmg CO meter all pump dlS dIScharge If measured front and If clH01 1li1 1 I 1 EC 1 f level rear value IS out equally turn adJustmg Idle EC 73 of the m r l m best l 1 d 4 J o 9 n w i 1 Y hose speCified adJust nuts approximately 2 1j J EC 151 AdJusting Ilfnlhon hmlng At the same tune IS rpm with 1 700 opener adJustmg screw then gradu ally decrease the engme speed to J F1 The number of of Idle returns r Note nuts 1 S j both nuts by FIlf EC 154 Idle adjUst nuts EMISSION CONTROL SYSTEM 16 see Lastly use a flow meter agam to whether the front and tor flow volumes au rear carbure equal and Idlmg speed IS specIfIed rpm are also ascertam that the to the adJusted TROUBLE DIAGNOSES AND CORRECTIONS CONTENTS EXHAUST EMISSION CONTROL Air pump SYSTEM EC 75 EC 74 EXHAUST EMISSION CONTROL SYSTEM A prelmunary DIagnoSIS GUIde IS Included below as an aId In trouble shootmg the Trouble exhaust or exhaust system malfunctIon of the anti backfire valve or msufficlent au delivery Defect supply hose baked or carburetor or resulting In insuffIcIent reqUIrement adJustment malfunctIon of the DefectIve check valve Incorrect the mtake mamfold to duration tlll1e to the engine Incorrect Idle mIXture Au dIsconnected collapsed clogged leakmg Defect m control system Probable cause Anti backfire valve vacuum lme ExcessIve backfire emISSIon on air spark plug high or tensIon cables dlstnbutIon mamfold adJustment of Idle speed Idle mixture choke settmg Rough engine Incorrect basIc Igmtlon tlmmg Idle Leak of vacuum at the antI backfire valve vacuum line or aIr mlet hose En me es at all sJeed Defective or stlcked anti backfire valve DefectIve or stlcked antI backfire valve Incorrect carburetor choke settmg EC 74 adjustment of Idle speed Idle mixture EMISSION CONTROL SYSTEM Probable Trouble Incorrect choke EngIne stop carburetor cause adJustment of Idle Idle mixture speed settIng Incorrect basIc tImIng DIsconnectIon of vacuum tube ofthe antI backfire valve Dnve belt NOIsy pump dnve belt aIr Seized or Improperly adJusted falhng Mlsahgned Air pump When mounted does tIme on and vane external Noise shoes pulley the felt and the 2 should be chIrp be dIsassembled carbon pump defectIve ehmInate not pump must the vehIcle or aIr cause replaced The aIr mJectIon completely nOIseless condItIons nOIse IS pump Under nses not pItch In 2 normal as speed Increases Beanng A sound IndIcates bearmg ThIS sound will be notIceable at rolhng nOIse speeds but IndIca te beanng does Make sure that the pump rotates correctly and check the belt for nOIse Increases to level the proper tensIOn replaced engme If excessIve nOIse IS all heard I 2 or Check hoses for tightness leakmg touchIng with other parts 3 Check the bracket and the pump aIr ThIS mountIng cleaner for secure mstallatIon 4 Check rehef valve for escapIng NOIseinternal Vane Rear 3 beanng nOIse contmuous However faIlure beanng necessarily not an If knockIng replaced 3 be broken replace sound When trus dIsmount the pump from the verucle and Inspect carefully nOIse occurs 4 Small shoes AdditIonal wear m trus conditIon If addItIonal tIme may ehmInate wear m I pump dnve rotate three quarters of and one quarter backward If CondItIon m one hub m Jerks full turn forward of roughness Probable Trouble one or grooves full bumps turn are 5 If chIpped by grease confirm trus to of corners When vanes edges are vanes WIth shoes or the are broken Illdlcate Improper Damaged mspect vane normal Broken assembly of shoes must be and spnngs must be properly hub beanng by blowmg complessed to the III parts wear questIon CorrectIve actIon AdJust Replace Replace Worn carbon shoe Replace Worn SIde seal Replace WIth new pump dnve belt tension to on an Remove carbon dust Worn vane EC 75 Carbon dust may be present This IS and III housmg of normal Replace pump vane caked IlldlcatlOn value Damaged In Vane vanes cause ExceSSIve slackness of drIve belt dehvenng aIr A Installed WIth the pump removed from the vehicle the vanes IndIcated or All contactIng replaced car also IS square shoe sprIngs from beanng Remove carbon shoes and surface Replace Off out the should cause chIrpIng or squeakIng nOIse commonly assocIated wIth vanes rubbIng In housmg bore Vane c1urpIng IS most notIceable at low speed and IS heard IntermIttently pull seal removed bearIng a seal rotor nng and carbon rear faIlure aIr most InsuffiCient WIth Inspect nOIse InoperatIve falled seal must be of grease vane shaft by results or vane absence IdentIfied Trus and beanng may seal commonly rear be to nOIse IS defectIve obJectionable A IS Inspect failure have cover carbon should not have any holes caused by wear or be broken or cracked Such condItIon nOIse the rear remove specIfIed aIr EMISSION CONTROL SYSTEM ConditIon AIr leakage Probable Leakage clamps from hoses Leakage from relief Abnormal nOIse Corrective actIon cause connectors or valve StIck of aIr pump Slackness ofdnve belt I Leakage from hoses m acceleratmg connectors clamps EC 76 or Repair or tighten Replace If necessary Replace relief valve Replace wIth AdJust new assembly dnve belt tensIOn RetIghten or replace SECTION SE EMISSION CONTROL SERVICE EQUIPMENT SYSTEM RECOMMENDED PERIODICAL MAINTENANCE INI NI NISSAN MOTOR CO TOKYO LTD JAPAN EC 18 SERVICE DATA EC 19 SERVICE TOOL EC 90 EMISSION CONTROL SYSTEM r y RECOMMENDED PERIODICAL MAINTENANCE Item Interval mues Engine Check and Engine adjust Ignition tlIDmg every 12 000 tune up Check spark 3 000 plugs Replace spark plugs 12 000 Check lugh tensIOn cables 12 000 Check dlstnbutor breaker pomts Replace Replace 3 000 dlstnbutor breaker pomts Grease dlstnbutor 2 earn and cam 12 000 heel 6 000 carburetor au cleaner element 24 000 Crankcase EmIssion Control Check hoses and plpmg connections for looseness and 12 000 clog Check ventuatlOn control valve for operation Replace 3 12 000 ventuatlon control valve 24 000 Exhaust EmiSSion Control Check throttle opener settmg throttle valve operung positIOn fust and vacuum every Check transmiSSIOn controlled vacuum Check automatic temperature control advance air cleaner Check boost control deceleration deVice for operatIOn B C D D boost control deceleration deVice for operatIOn B C D D Check spark tlmmg control system for operatIOn Check air pump drIve belt for tensIOn and wear 12 000 first 600 3 000 12 000 12 000 240Z Check air pump for operatIOn 240Z only Evaporative 12 000 12 000 every Adjust 600 12 000 Check electncal SWitches of emission control system for operation 4 3 000 only 12 000 12 000 EmiSSion Control Check hoses hose connectors and plpmgs for leaks 12 000 Check flow 12 000 gUide valve for proper function EC 78 EMISSION CONTROL SYSTEM SERVICE DATA LBllOTRU KLBllOU LBllOARU KLBII0AU Item Engme model A12 4 mime Number of cyhnders Type of cyhnder head Displacement x bore OHV stroke x 71 5 x 2 874 2 756 x cumxmxm Nommal compressIOn ratio 85 Recommended fuel Regular grade to 1 F4W56L Transmission type 3N71B 1st 3757 2458 2nd 2169 1458 3rd 1404 4th 1000 Rev 3640 Final gear ratio TOP 1 000 2182 3900 Ib Curb weight Type of crankcase Type of exhaust control emiSSion emiSSion 1 585 control 1 605 Closed type Engme modification 1 660 system Carburetor Make HITACHI Model DCH306 1A DCH306 1 DCH306 3A DCH306 3 Downdraft Type dual throat PrImary Secondary india 1024 1 181 mdla 0787 1024 0315 0276 Barrel Bore Large ventUrI Small ventUrI Main Jet Main air bleed Slow Jet 1st milia 2nd milia 0512 97 140 80 80 43 50 IC 79 1 680 EMISSION CONTROL SYSTEM LBllOTRU KLBllOU LBllOARU KLBllOAU Item Slow air bleed 215 100 45 Power Jet lA 50 Accelerator pump inJector m 1 002 dla InJectIOn volume CUIn 0037 Dumper oz 352 spnng 3A 3 Electnc automatic Choke choke Throttle opening at full choke 170 Dashpot 200 X X X Alternator Make HITACHI Model LT135 Capacity VA 13 1235 Dlstnbutor Make HITACHI Model D412 80 Condenser tlF D412 63 022 Spark plug Make Model NGK HITACHI BP 5ES L46PW Flow gUide valve Make HITACHI Model FGA l Openmg mHg pressure 04 Control valve Make HITACHI Model TPA28 1 TPA28 3 level mHg 22 2 to 22 8 21 5 to 22 0 m 0 1969 Opening depressIOn Servo at sea dlaphragIn Full stroke Mark X means available EC 80 X EMISSION CONTROL SYSTEM KLB 1 IOU LBllOTRU LBllOARU Item 1700 to 1800 rpm Opening of engme stroke no Transmission controlled vacuum Temp m 4th gear 500F Above sensmg SWitch on Vacuum advance only advance speed load ON Tune up data BasIc tlIDlng oBTDC Idhng speed CO Percent 700 5 rpm 20 settmg 490 DIstrIbutor dwell angle Spark plug gap 600 700 rpm to 550 at 002 Inch of pOint gap In 00315 to 0 0355 EC 81 In drIve range KLB 110AU EMISSION CONTROL SYSTEM PL510TU RPL510TU PL510AU Item model EngIne Number of cylInders Displacement x lU In x 4 hedd bore In x In SOHC x In 97 4 x 3 268 2902 85 to I Recommended fuel Regular grade TransmIssIon type 3N71B F4W63L 3N71B 1st 3382 2458 3657 2458 2nd 2013 1458 2177 1458 3rd 1312 1000 1419 1000 4th 1000 Rev 3364 Curb weIght Type of crankcase 1000 3638 2182 2182 3900 lb 3889 2 105 149 2 2 205 2 160 2 260 2 315 Closed type control of exhaust Engme control catIon emISSion x F4W63L FInal gear ratIo Type WPL510AU lIne NomInal compressIOn ratIo emiSSIOn WPL510TU L16 Type of cylInder stroke RPL510AU modlfi system Carburetor Make HITACHI Model DAH328 2A DAH328 1A DAH328 2A DAH328 1A Down draft Type dual throat 1 Barrel 2 PrImary Secondary Bore Large MamJet air bleed Slow Jet Slow wa m dla 1st In dla 2nd In dla ventUrI Small ventUrI MaIn m aIr bleed 1102 1260 0906 1102 0354 112 155 240 120 48 Ul80 150 100 130 EC 82 I 100 150 I 100 130 I 100 EMISSION CONTROL SYSTEM I PLSIOTU RPL510TU PL510AU RPL510AU WPL510TU Item Power Jet InJectIon WPLSIOAU 50 volume 003 CUIn Dumper 265 oz sprIng Vacuum Jet ISO 130 Electnc atuo Choke sprIng matIc choke ISO Fast Idle 170 ISO 170 AJternator Make HITACHI Model LT135 13 LT15 05 12V 35A l2V 50A Capacity DistrIbutor Make HITACHI 0412 81 0412 84 from Oct off hne Model 022 Condenser tlF Advance o 05 Retard Spark plug Make NGK Model BP 5ES Flow HITACHI L46PW gUide valve Make HITACHI Model FGA 2 OpenIng pressure InHg 0394 Spark tImIng control system Speed SWitch Over 13 Third gear sWItch ThIrd gear ON Throttle sWitch pOSItIOn 3 to 300 ON under 30 or above 300 OFF Temp sensIng sWitch mph ON Over 13 ThIrd gear ON 500F ON under 340F OFF above EC 83 mph ON EMISSION CONTROL SYSTEM PL510TU RPL510TU PL5lOAU RPLSIOAU WPL510TU WPL510AU Item Tune up data BaSIC timIng 70 BTDC IdlIng speed 700 rpm CO percent settIng 20 49 to DistrIbutor dwell Spark plug gap 600 rpm angle In 550 at pOInt gap 0 0197 m 00315 to 0 0355 EC 84 In drIve 700 rpm 600 rpm In drIve EMISSION CONTROL SYSTEM PL521TU PL52ITUH Item Engme model Ll6 Number of cyhnders Type 4 mime of cyhnder head Displacement x bore x SOHC stroke cumxmxm 97 4 3 268 x Nommal compression ratio 85 to I Recommended fuel Regular grade TransmiSSion type x 2 902 F4W63 1st 3657 2nd 2177 3rd 1419 4th 1000 Rev 3638 4375 Fmal gear ratJo 2 200 Ib Curb weight Type of crankcase emiSSion control Type of exhaust emiSSIOn Closed control Engme 2 190 type modlficatJon system Carburetor Make HITACHI Model DAH328 3B Down draft Type Barrel 2 PrImary Bore Large mdla m dla 1st m dla 2nd mdla ventun Small ventUrI Mam Jet Mam air bleed Slow Jet Slow Dual throat au bleed Secondary I 102 1260 0906 1102 03543 112 155 240 120 48 180 150 100 EC 85 EMISSION CONTROL SYSTEM PLS2ITU PL521TUH Item SO Power Jet InJection Dumper volume sprIng cum 003 oz 26 S Vacuum Jet ISO Choke 130 Electnc automatic choke ISo Fast tdle AJternator Make HITACHI Model LT13S 13 Capacity 12V 3SA Dlstnbutor Make HITACHI 0412 81 0412 84 from Oct off Ime Model Condenser uF o 22 Advance 0 OS Retard Spark plug Make Model NGK HITACHI BP SES L46PW Flow gUide valve Make HITACHI Model FGA I Opening pressure 0394 mHg Spark tlmmg control system Thud gear SWitch Third gear ON 3 to 400 ON Throttle switch pOSItion Temp under 30 or above 400 Above SOoF ON under 340F sensmg SWitch OFF Tune up data 70BTDC BasIc tlmmg Idhng speed 700 rpm CO percent settmg 2 490 DIstnbutor dwell angle Spark plug gap m to SSO 0 0197 m of pomt gap l031Sto00354 EC 86 OFF EMISSION CONTROL SYSTEM HLS30 AU HLS30U Item Engme L24 model 6 mlme Number of cyhnders Type of cyhnder head Displacement x bore x SOHC stroke 146 cumxmxm 3 268 x x Nommal compresSIon ratio 88 to I Recommended fuel Regular grade 2 902 3N71B F4W71B Transmission type 1st 3549 2458 2nd 2197 1458 3rd 1420 1 000 4th 1000 Rev 3164 2182 3545 364 3 Fmal gear ratio Ib Curb weight Type ofcrankcase Type of exhaust emiSSion control emiSSIOn 2 360 2 300 control Closed type Au mJectlon wIth engme mo lificatlon Carburetor Make HITACHI Model HJG 46W 8 SU type Side draft Type Bore mdla 1811 Suction piston hft mdla 1339 Jet mdla 0100 Metenng N 58 needle 23 SuctIOn spnng from front carburetor VC hole Fast Idle HJG 46W 9 60 throttle opening at full choke EC 87 70 of EMISSION CONTROL SYSTEM HLS30 U HLS30AU Item AJternator Make HITACHI Model LTISO05 CapacIty 12V SOA DIstrIbutor Make HITACH Model D612 S3 Condenser pF D61452 0 22 022 Advance 0 OS Spark plug Make NGK HITACHI Model BP 6ES L4SPW Au pump Make HITACHI Model ECP 2003 Capacity Pulley cu m Rev 122 ratio 093 Anti backfire valve Make HITACHI Type Gulp type Model AVS4 IB I S to I 9 sec at 197m Duration tlIDe Pressure difference Check valve Make HITACHI Model CV27 2 Opening pressure 0 1496 mHg Flow gUide valve Make HITACHI Model FGA 3 Openmg pressure mHg 04 EC 88 Hg Retard EMISSION CONTROL SYSTEM S30 HI U S30 HI AU Item Control vaJve HITACHI Make Opening negattve pressure Bellows outer diameter Servo 4 TPA28 TPA28 2 Model 205 mHg m 193 1024 dla dlaphragIn 01969 mdIa Full stroke SD46 1 Type Tune up data BasIc tlIDmg Idhng speed o 0 6oo 750 5 rpm 750 rpm CO percent settmg With au pump disconnected 6 DIstrIbutor dwell angle 350 to 410 Spark plug gap m or m dnve to 390 below 00315 to 0 0354 EC 89 600 330 EMISSION CONTROL SYSTEM SERVICE TOOL Special Spectal tools necessary to tools for air inJectton perform recommended emiSSion control mamtenance are as follows pump S M reference Tool number Former tool number Tool DescnptlOn Figure Apphed model page See name Fig No STl98 I 0000 STECP20000 For removmg and Hexagon wrench mstalhng L24 the rotor rIng assembly Page EC 58 Fig EC Il6 Page EC 58 L ST19820000 STECP20001 Support for dlsas sembhng rotor rIng S For supportmg the rotor rUlg m case of needle bearmg L24 Fig EC Il7 removal and mstallatlOn STl9830000 STECP20002 Attachment for For removmg tIre needle pushmg out needle bearmg beanng L24 Page EC 58 FIg EC Il7 L24 Page EC 60 L24 Page EC 58 ST I 9840000 STECP20003 Attachment for pressmg m needle bearmg @ For mstallmg beanng tIre needle STl9850000 STECP20004 Use Bndge out for pullmg rehef valve as a bndge for removUlg the rehef valve by tIre puller EC 90 Fig EC 119 EMISSION CONTROL SYSTEM S M reference Tool number Former tool number Tool Apphed DescnptJon FIgure model name page See FIg No STl9860000 STECP20005 For Dummy shaft assemblmg the L24 Page EC 59 Fig EC 121 L24 Page EC vanes STl9870000 STECP20006 For checkmg performance Au pump test gauge adaptor The special tools for AI2 and L16 engmes are Other necessary tester 1 Carburetor balancer 2 3 Engme exhaust combustIOn analyzer IgnltJon analyzer OSCilloscope 4 Distnbutor advance tester 5 IgnltJon tlImng hght 6 Tachometer 7 Pressure gauge 8 Vacuum gauge 9 Ammeter 10 Voltmeter II Ohmmeter 12 13 CompressIOn tester Cam angle dwell meter 14 Thernllster EC 91 the au not aVailable as pump emiSSion control mamtenance 67 EMISSION CONTROL SYSTEM SERVICE JOURNAL OR BULLETIN REFERENCE BULLETIN or No SUBJECT P AG E No h JOURNAL DATE EC 92 EMISSION CONTROL SYSTEM SERVICE JOURNAL OR BULLETIN REFERENCE JOURNAL DATE BULLETIN or No PAGE No SUBJECT EC 93 r EMISSION CONTROL SYSTEM SERVICE JOURNAL OR BULLETIN REFERENCE JOURNAL DATE BULLETIN or No PAGE No SUBJECT EC 94 WIRING DIAGRAM MODEL LB110 FUSE 0 615 HORN RELAY SIDE MARKER R H HORN L HEAD LAMP R H JRTH O G l If hI5 6 b l m BLOCK o OA 15A I Iql5A h 5a YB I BG i 1RB I RW RB G L I I DOOR GR GB PARKING TIS LAMP R H lOP em FF GL GB B ABO Ff I rBF ON I W I n R t R iP L MAIN b FUSE1 N HIBIT FULO SW Smmt lID I m ST RT R OTOR @ I J 1n i n DE AUTO CHOKE ID THERMAL TRANSMITTER RELAY AUTO CHOKE em O G I B a LIGHT SW I HAZARD sw FLASHER UNIT 1 WIJ BL B I LW FUSE L m RECEIVER 1 SPEAKER I HAZARD UNIT COMBINATION LAMP L H I WIPER a WASHER SW q CIG TIS CKU LIGHTER HEAT GLASS z LW EI j ANTENNA I HEATER SW W H I a m J d 1 f COLOR CODE WI PER MOTOR d MARKER LIGHT SW L1CEN SE LAMP If t ml SIDE D TIS G G L G R GB INDICATOR LAMP I I m B BRAKE CHECK SW 0 VALVE m G WASHER MOTOR LH EC 95 LAMP EARTH GR B G R GL REAR COMB FIX BOLT OFF ON ALTERNATOR I HOR N YB WR B HEATER rlf f mR b GB GR RY RW RB L I I HEAD LAMP L H v f SW HAND BRAKE BG GB G GR f SW a STG LOCK e G L H @ rt J YG Y YW RW L UTO I R BY @ IGN I YG ROOM LAMP 5 o TACHO METER K TIS STOP TAIL EARTH COMBINATION LAMP R H RD8 r BW BW ll BATTERY STOP L SW BY fly a KICK DOWN SW GY GW BL YB kRESI TERa I WARNING SW cJ A TANK UNIT SW R R WR I BUZ GW WL LR KICK DOWN SOLENOID PARKING T S LAMP L H 3 R fA FNELlG VOLIAGE REGULATOR MLW Notes 1 LR 2 B Black The electncal wiring diagram shows parts and Circuits which are used on the Manual Transmission Model and or the W White R Red Automatic Transmission Model Y Yellow G Green L Blue The cutting valve only Model circuit IS used on the Manual Transmission WIRING DIAGRAM BODY B MODEL PL510TU r HEAD LAMP RELAY SIDE MARKER LAMP R H HORN RELAY WIPER PARK a TURN LAMP RH GB GL 0 t n g t JO mmm tm MOTOR 0 III I L BY R SW x OPTION PARTS HAZARD WARNING SW t LW B L LY BY J HEAD LAMP RH WIPER SW RY 8 I WR BW BY LB BL LIGHTING tV BG WR BW n H HORN iGNITION I JlDr m GY J m J m mmt Umo moo II O t 0 D Ji Jt J mm OO G t 0 tt J o DEFROSTER SW Canada NN m m QO J I 11 LC Canada BR BACK UP LAMP SW aw BL RESISTANCE 8 0 BG LLW X L SIDE MARKER LAMP L H Y WASHER MOTOR EC 96 SPARK PLUG S NG ROOM LAMP mm l0 tK LICENSE LAMP REAR COMB LAMP L H r tIJ l CLOCK COMBINEDINSTRUMEN T LR LB LW IGN COIL f I o D BACK UP STOP TAIL TURN B 0 o I eCIG 1m PARK a TURN LAMP L H I LIGHTER I 0 A I Lr ANTENNA BODY EARTH r@ l R WR LW b rtG L J 1G B IJ H onlv YW YB ONLY RW RB RL Canada Rr only REAR COMB LAMP R H REAR DEFROSTER SWYG RW TBURETOR REAR SIDE E r TS PL PARK ING BRAKE P RELAY THERMAL TM RYLR YG STG LOCK SW DEFROSTER m TURN TAIL STOP BACK UP B I I m G B GR GY GW R B RL HIZ 0 m g TURN SIGNAL SW J SW FLASHER UNIT I 2 3 4 1 RB y Ir N I TEMP SW USA ON LY I only r 0000 L G I BRAKE SYSTEM SW l BG BR GB GR SW STOP LAMP SW l s I t SW IJR BL W L YG GY III ot rrfDo T Ii 8 RW YW YB I RY Rlt F HEADAMP LH rY t q 000 s RH LI IJII GB Jt t lUk w RB R om J1J I 1 CII HAZARD FLASHER UNIT I EARll r f R I i I COLOR CODE J 13 4 HEATER SW BR ll RADIO HEATER UNIT DOOR SW L H 8 BR B Black W Whote R Red Y Yellow G Green L Blue WIRING DIAGRAM MODEL PL510AU SIDE MARKER LAMP R H B HEAD LAMP RELAY INDICATOR RELAY jHAZARD JfLASHER UNIT HORN RELAY WIPER MOTOR J BR J jIlj PARK a TURN LA m GB GL aa JQ e e em mlDc m IiI a J Lg I iii r Oi GR GB 2 t r Je e 3 L G grrRW L Y BY HEAD LAMP RH rr LW B L LY BY LW RB R IP WR BW BV LB n p 4 4 tlGHTI I BG J a atJla tre e ma J Jma J a m mlDCl 33 s 3 CD m 3 YIII a8 iJl Il 30 OUJcrP BRAKE SYSTEM SW AUTO CHOKE Je J NP 0 QNN IL PRESS SW L LR DEFROSTER SW 0 00 J@ al FUSE BLOCK ICanada onlvl o r l J NN INDICATOR LAM 1 O NIL MOVE INDICATOR RELAY LL STl LOCK SW AMP RB GW RB RL RVL DEFROSTER RELAY ij SIDE MARKER LAMP L H Q f x L mll LWeBEI L il i I EC 97 RELAY CARBURETOR SIN I BODV EARTH TAN UIoIIT LICENSE Co 0 J RADIO h HEATER UNIT 111 LAMP 1l 1II CCC REAR COMB LAMP l H l@ 12 HTER X CLOCK COMRINED P 4 lm1 l TI HEATER SW BACK UP STOP TAIL REAR SIDE MARKER LAMP L H TURN IN STRUM ENT I LR LB LW X WASHER MOTO R I VR BG OO O C R WR LIN PLUGS PARK a TURN LAMP L H OnIYI VW VB o i J MARK LAMP RH BR onlvl RW J GL GB Canada llllA BU RESISTANCE BW BL TURN TAil STOP BACK UP REAR COMB LAMP R H REAR DEFROSTER Jr TSPL SWYG P B RW RB RL Ic TURN SIGNAL SW PARKING BRAKE INHIBITOR SIN HEAD L H U 4r TT YG I Canada TM N BR I THERMAL I I i L m SIN r I 9 P GB 0000 N fllrli FLASHER UNIT 2 3 4 5 R 00 eJ I HEATER U Lrr BG BR mm m 0 I l J J mo G KICK DOWN SW ff1 I i 1TI0N SW F R e I SIN ot i l IGN WR L VG HORN SIN fHm G LW rr R B RW VW YB Ll PARTS NG SW 1 R SIB LE OPTION Jo I WIPER RY I ll HAzARD WARNING e DOORSW RH t n y e I GY GY L J I am JmJ BODV EARTH DOOR SW L H BR f e I BR COLOR CODE B Black W WhIte R Red Y Yellow G Green L Blue WIRING DIAGRAM MODEL WPL510TU HEAD LAMP RELAY SIDE MARKER LA RH HAZARD FLASHE UNIT HORN RELAY B SW WIPER MOTOR PARK a TURN LAMP R H GB GL c I II m aa i3 a el el Ja a m irelm I Jm J J 9 coa m Jelel l RW RBI R HEAD LAMP RH HAZARD WARNING SW JoJel 2 LW 11 4 5 LY BY 4 WI RY GL GW WR PER SW 4m R LIGHTING sw G BIG BR 18LE 8R LW IK LII RB RW YW YB R R I vEGULATOR I 1 J a alC Jma mmC a m I 1 t m m A fill m J m I J m STOP LAMP SW FLASHER UNIT YG GY III JCl a lD II IGNITION SW G m HORN I 2 3 4 5 m a a r mlIl I I IIII J 2 Effect ve wIth m Aug 1971 REAR WINDOW L f DEFROSTER Canada G UTO m DEFROSTER SW Canada only CJ a m el O J TEMP m a Effective with SW TURN SIGNAL SW B J r R am LW L9R elel only 1971 Aug UTAIL TURN STOP BACK UP W RB REAR COMB LAMP R H L BR L TS PL 8 3 m YW YB BAC K UP LAMP SW HEAD L H J JCl I R WR LW AMP RW RB RL I CLO RESISTANCE BW BL 3 0 r ANTENNA BW LW J GL G B i 0L a 11 PARK a TURN LAMP L H Id SIDE MARKER LAMP L H e REAR SIDE MAR KEIr LAMP LH HTER x CLOCK COMBINED a IGN COIL Y WASHER MOTOR SPARK PLUGS RADIO a BOX LAMP a SW EC 98 BR BR J HEATER UNIT x HE II rr MEANS B BACK UP STOP TURN TAIL INSTRUMENT DOORSWLH L X ENG ROOM LAMP L1CEN SE LAMP S OPTIONAL PARTS COLOR CODE B Black W WhIte R Red Y Yellow G Green L Blue WIRING DIAGRAM B MODEL WPL510AU INLICATOR RELAY SIDE MARKER LAMP R H HORN RELAY WIPER MOTOR I PARK a TURN LAMP R H IJ er oo e e ee m 10 10 8 BODY EARTH HEAD LAMP RELAY lOme 1O 0 L r lm J I J GY G Y G GY om a 3c J J LW B L R LY BY HEAD R H dJ RY GL GW WR n bGY G BG BR GB GR LW RB RW FUSlBL I I WR L YG GY LB m I J1O a JO IO O e l IL J aC CJI aaxn I V REGULATOR HORN m J Y 10 ID I a AUTO uTol m a J mC I ID J I IDa 2111 r l IA 2 II 0 a J r FLASHER UNIT DEFROSTER SW Canda 10 I L R eJe 0 ID O RSW 1971 EffectIVe With ID J 22lil2 Aug only 1971 LW TURN SIGNAL B J o Aug REAR WINDOW DEFROSTER Canada L SPEED DETECTOR BRAKE SYSTEM only EffectIVe With mal 10 J aa LgR LgB TAIL R L BR L T SPL RELAY Canada only Effective With Aug y BACK UP REAR COMB LAMP R H RyB OEFROSTER ALTERNATOR u GW 4 1971 mID IDlDo a AMP RW RB RL RESISTANCE IG L t G B i J LW ANTENNA BG PARK a TURN LAMP L H SIDE MARKER LAMP L H BLIGHTER Q CARBURETOR SW R LY BY EC 99 TAIL COMBINED INSTRUMENT DOOR SW LH I RADIO II 0 X I PfU COLOR BR BR J Y OX LAMP a SW loP TURN X ENG ROOM LAMP WASHER MOTOR 8 LR LB LW REL am REAR COMB LAMP LH R WR LW CIG 0 Y SE eo L I 0 1m a YW YB KICK DOWN SOLENOID INHIBITOR SW HEAD L H ffl t 3 THERMAL TM HEATER UNIT OPTION PARTS CODE B Black W White R Red Y Yellow G Green L Blue WIRING DIAGRAM x MODEL PL521 HAZARD SW 2145 FLASHER UNIT 51 DE MARKER AUTO CHOKE RELAY LIGHT R ELAY 12 J m a aa E 8 J Cl J Cl Jm ma I CW J PCl ClCl I TANK UNIT GAUGE BACK UP LAMP SW ia LI RL SIDE MARKER LAMP R H f t I m Y a L aa Y L L RL RL HOOD SW W WR G RB RW G B RH CLEARANCE T C 8 TURN SIGNAL LAMP HAZARD FLASHER @ @UNIT JU RL LAMP RH HEAD LAMP NHEIG r a m m SJOP W HORN RELAY LAMP i GB I W RW uR I R 0 RY L R RB G RG l YW YW YB XRH FOG LAMP TU RY R RB L RL RG RG U U Hn 1 Lg U m THERMAL TRANSMITTER cpi s Cl EWM I h B VOLTAGE REGURATOR a or 3 II 1 SW a Cl LAP R h L 1 1 t J 06 fO It Lg J YR YB YG U m TWR I Eh N 0 DOOR RY ll I 1 m J ma SW RY J I IIII 7R a z WIPER HER RB ENFAIGJ B Cl HEATER SW lOP I WU Y I FUSE i BW BY p W BW LWjJ X YW ALTERNATOR Ln B IG IGNITION SW X CIGARETTE LIGHTER l L Cl ma xL H FOG UCENSE LAMP RL f II 1 LAMPlP B lP BATTERY Jr TER STAR Cl aCl MOTOR LH CLEARANCE C T 8 TURN SIGNAL LAMP l x G HORN a J RESISTER L a iB CL tml COIL B 1 l DISTRIBUTOR LH HEAD LAMP HORN H m ma a m 1 J a g THRor LE SW 5 j AUTO CHOKE HEATER 1 41 8 RADIO CE JELY RELAY EI EC 100 LW TRANSMISSION SW 3re1 SW L NDf LLLR L 71 F If t U amCl HEATER MOTOR LgR 3 @ X 2 I COMBINATION METER 5 I WASHER MOTOR SIDE MARKER LAMP L H I ACC SW CLOCK SIDE MARKER LAMP LH il 1 nfl ANTENNA J k CXlJ m3Q lk WIPER M TOR LB LW 8 7i m Cl U LJ IGNITION J J D J3 J W t NS iE L I eLQ l MEANS OPTIONAL PARTS COLOR CODE B Black W WhIte R Red Y Yellow G Green L Blue WIRING DIAGRAM M E M ACC RELAY OWQq 1 MODEL 830 m mTtfllJ m m II AUTO TIM KD SOlEN T Qq a J ma I STEP L R H SIDE M L Q I L QGB o m GB GL B B PARKING a TIS a SIDE F R H Is W TAIL B EARTH RB REV R COMB o OR RW RB HEAD L RH R RG 0 000 R SW RH FOG L m L RH o J SW mm a m m za m C L VI REG z MAP LAMP HORN CIG L1GHTER H EAFN rrtJ LIG BU RL L m LICENCE L R H IL CLOCK R FOG L FOG L m RHO L H LICENCE L LH m oJ HEAT RADIO u m 1D B B REVERSE S FLASH HORN GLASS aa L Oa R COMB THERMO SW AUTO TIM ORB DIST r r YL I G B RW RY HEADL L H HAZARD FLASH L BRAKE IN B THERMO RELAY IAUTO TIM BW STOP SW o SPEEDO METER 1iAND OGY BRAKE SW GY L L H m n M L co LW nOli ANTENNA SW AUTO ANTENNA B RESISTOR AUTO TIM 5GL GR B PARKING a TIS a SIDE F L H I m 2J TOC I I J SIDE M LAMP L H MAM COMB l E DIST TIM i III COLOR CODe D t a pttlJfd CWI iI I STG n INHIBITOR SW AUTO TIM EC 101 SN LOCKSW WIPER MOTOR IGN am ma HAZARD SW SN INDICATOR LAMP AUTO TIM B Black W White R Red Y Yellow G Green L Blue
