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BE−165 BODY ELECTRICAL − AUDIO SYSTEM BE0GC−04 TROUBLESHOOTING NOTICE: When replacing the internal mechanism (computer part) of the audio system, be careful that no part of your body or clothing comes in contact with the terminals of the leads from the IC, etc. of the replacement part (spare part). HINT: This inspection procedure is a simple troubleshooting which should be carried out on the vehicle during system operation and was prepared on the assumption of system component troubles (except for the wires and connectors, etc.). Always inspect the trouble taking the following items into consideration. S Open or short circuit of the wire harness S Connector or terminal connection fault S For audio systems with anti−theft system, troubleshooting items marked ( * ) indicate that ”Troubleshooting for ANTI−THEFT SYSTEM” should be carried out first. Problem Radio Tape Player CD Player Power Amplifier Noise No. Radio not operating when power switch turned to ’ON’. 1 Display indicates when power switch turned to ’ON’, but no sound (including ’noise’) is produced. 2 Noise present, but AM − FM not operating. 3 Any speaker does not work. 4 Any AM or FM does not work. 5 Few preset turning bands. 5 Reception poor. 6 Sound quality poor. 7 Preset memory disappears. 8 Cassette tape cannot be inserted. 9 Cassette tape inserted, but no power. 10 Power coming in, but tape player not operating. 11 Any speaker does not work. 12 Sound quality poor. 13 Tape jammed, malfunction with tape speed or auto−reverse. 14 Cassette tape will not eject. 15 CD cannot be inserted. 16 CD inserted, but no power. 17 Power coming in, but CD player not operating. 18 Sound jumps. 19 Sound quality poor (Volume faint). 20 Any speaker does not work. 21 CD will not be ejected. 22 No power coming in. 23 Power coming in, but power amplifier not operating. 24 Any speaker does not work. 25 Noise occurs 26 Noise produced by vibration or shock while driving. 27 Noise produced when engine starts. 28 The term ”AM” includes LW,MW and SW, and the term ”FW” includes UKW. BE−166 BODY ELECTRICAL − AUDIO SYSTEM Troubleshooting for ANTI−THEFT SYSTEM Turn ignition Key from LOCK position to ACC position. Display A: ID Number is set. Display E: ANTI−THEFTSYSTEMoperationcondition.(IDnumberinput error 10 times or more.) ”SEC” display disappears after 1 second. Display B Radio switch ON. Display D Display B Take to designated radio service station. Yes No Refer to each malfunction item. OK Radio switch ON. Normal operation. Normal operation. NG Cancel ID number, refer to each malfunction item. ANTI−THEFT SYSTEM operation condition. (ID number input error 9 times or less.) Input ID number to cancel ANTI−THEFT SYSTEM, and check display. Display A®B Display B Display E Display C®A Radio switch ON. Refer to each malfunction item. Take to designated radio service station. ANTI−THEFT SYSTEM not cancelled. (ID number input error 10 times or less.) Display D OK ANTI−THEFT SYSTEM cancelled. Check audio system again. Normal operation. Display ”E” NG Cancel ID number, refer to each malfunction item. 2 DIN Type [Liquid Crystal Display (LCD) or VFD for Audio System] Display ”A” Display ”B” Blank Display ”C” 2 DIN Type 1 DIN Type 2 DIN Type 1 DIN Type Display ”D” Example: Radio Display Error Times No Illumination 2 DIN Type 1 DIN Type 1 DIN Type 2 DIN Type 1 DIN Type HINT: D Refer to Owner’s Manual for operation details of ANTI−THEFT SYSTEM. D When the ID number has been cancelled, reset the same number after completing the operation, or inform the customer that it has been cancelled. V08418 BE−167 BODY ELECTRICAL 1 Radio − AUDIO SYSTEM RADIO NOT OPERATING WHEN POWER SWITCH TURNED TO ”ON” Is tape player operating normally? No Yes Check if RAD−No.2 fuse is OK? OK Replace fuse. NG Is power supplied to ACC terminal of power amplifier? Yes Check if RAD−No.1 fuse is OK? OK Is power supplied to +B terminal of power amplifier? Yes Check if GND (wire harness side) of power amplifier grounded normally? Radio assembly faulty. ACC wire harness faulty. No NG No NG Replace fuse. + B wire harness faulty. GND faulty. OK Is power supplied to ACC terminal of radio assembly? Yes Is power supplied to +B terminal of radio assembly? Yes Check if GND (wire harness side) to radio assembly is OK? OK Radio assembly faulty. No No NG Power amplifier or ACC wire harness faulty. Power amplifier or +B wire harness faulty. GND faulty. BE−168 BODY ELECTRICAL 2 − AUDIO SYSTEM DISPLAY INDICATES WHEN POWER SWITCH TURNED TO ”ON”, BUT NO SOUND (INCLUDING ”NOISE”) IS PRODUCED Radio Is tape player operating normally? No Check if RAD−No.2 fuse is OK? OK Is power supplied to ACC terminal of power amplifier? Yes Check if RAD−No.1 fuse is OK? OK Yes NG No NG Is power supplied to +B terminal of power amplifier? Yes No Is power supplied to ACC terminal of radio receiver? Yes Check if GND (wire harness side) of power amplifier grounded normally? ACC wire harness faulty. Replace fuse. + B wire harness faulty. NG No Is power supplied to +B terminal of radio receiver? Yes Replace fuse. GND faulty. Check if GND (wire harness side) of power amplifier grounded normally? OK Radio assembly faulty. Power amplifier faulty. Power amplifier faulty. No NG GND faulty. OK Does continuity exist in speaker wire harness? Yes Temporarily install another speaker. Functions OK? No Hiss noise from speaker? Yes Radio assembly faulty. Recheck system after repair. No Yes No Speaker wire harness faulty. Speaker faulty. Power amplifier faulty. Recheck system after repair. BE−169 BODY ELECTRICAL 3 Radio − AUDIO SYSTEM NOISE PRESENT, BUT AM−FM NOT OPERATING Go to No.25 If radio side faulty. 4 Radio Radio faulty. ANY SPEAKER DOSE NOT WORK Is tape player operating normally? No Is hiss noise produced by non−functioning speaker? No Yes Yes Does continuity exist in speaker wire harness? Yes No Temporarily install another speaker? Functions OK? No Power amplifier faulty. Recheck system after repair. Yes Radio assembly faulty. Radio assembly faulty. Recheck system after repair. Speaker wire harness faulty. Speaker faulty. BE−170 BODY ELECTRICAL 5 Radio − AUDIO SYSTEM ANY AM OR FM DOES NOR WORK FEW PRESET TUNING BANDS Problem with radio wave signals or location? No Yes Radio assembly faulty. Is power for the antenna being output from the radio assembly? No Are both AM and FM defective? Yes Poor signals, poor location. Yes No Go to No.16 Radio assembly faulty. Is tape player operating normally? No Temporarily install another speaker. Functions OK? No Hiss noise from speaker? Yes Radio assembly faulty. Recheck system after repair. Yes Yes No Speaker faulty. Power amplifier faulty. Recheck system after repair. BE−171 BODY ELECTRICAL 6 − AUDIO SYSTEM POOR RECEPTION Radio Is the condition bad in comparison with other vehicles? No Are there any additional installation parts? (Sun shade film, telephone antenna, etc.) Yes Yes No An electric wave environment is bad. Does the condition get better if removing them? Yes Influence of additional installation parts. Check if there is any scratch and breaking of a wire on the glass antenna and the defogger pattern. (visual check. tester) (See page BE−158) Repair. (See page BE−96) Yes No Is the contact of the plug jack of the radio OK? Yes Does the condition get better by using the outer antenna (such as pillar antenna)? No No Take a measure for contact. Check the radio. Yes Is the contact of the antenna terminal on the glass surface and the defogger terminal? No Take a measure for contact. Yes Replace the antenna cord. Is the continuity of the antenna cord OK? Yes Check the grounding of the antenna, antenna cord, choke coil, and noise filter. (See page BE−158) No NG Grounding failure. OK Does the condition get better by replacing the choke coil? Replace the choke coil. Yes No Does the condition get better by replacing the antenna cord? No Exchange the glass. Yes Replace the antenna cord. BE−172 BODY ELECTRICAL 7 Radio − AUDIO SYSTEM SOUND QUALITY POOR Is sound quality always bad? No Yes Is sound quality bad in certain areas only? Yes Poor signals, poor location. No Is tape player operating normally? Yes No Radio assembly faulty. Radio assembly or power amplifier faulty. Is tape player operating normally? No Radio assembly faulty. Yes Is speaker properly installed? Install properly. No Yes Temporarily install another speaker. Functions OK? Speaker faulty. Yes No Radio assembly or power amplifier faulty. Recheck system after repair. 8 Radio PRESET MEMORY DISAPPEARS Radio assembly faulty. Can cassette tape be inserted in tape player? No Yes Check if RADIO No.1 fuse is OK? OK Is power supplied to +B terminal of power amplifier? Yes Replace fuse. NG No Check if GND (wire harness side) of power amplifier grounded normally? OK Is power supplied to +B terminal of radio assembly? Yes Check if GND (wire harness side) of radio assembly grounded normally? OK Radio assembly faulty. +B wire harness faulty. GND faulty. NG No NG Power amplifier faulty. Power amplifier faulty. BE−173 BODY ELECTRICAL 9 Tape Player − AUDIO SYSTEM CASSETTE TAPE CANNOT BE INSERTED Is there a foreign object inside tape player? No Is auto search button radio operating normally? No Yes Yes Check if RADIO No.1 fuse is OK? NG OK Remove foreign object. Radio assembly faulty. Replace fuse. +B wire harness faulty. Is power supplied to +B terminal of power amplifier? No Yes GND faulty. Check if GND (wire harness side) of power amplifier grounded normally? NG OK Is power supplied to +B terminal of radio assembly? Yes Check if GND (wire harness side) of radio assembly grounded normally? Power amplifier faulty. No Power amplifier faulty. NG OK Radio assembly faulty. 10 Tape Player CASSETTE TAPE INSERTED, BUT NO POWER Is radio operating normal? No Yes Check if RAD No.2 fuse is OK? OK Is power supplied to ACC terminal of power amplifier? Yes Replace fuse. NG ACC wire harness faulty. No Replace fuse. Check if RADIO No.1 fuse is OK? OK NG Is power supplied to +B terminal of radio assembly? Yes Is power supplied to ACC terminal of radio assembly? Yes Radio assembly faulty. Radio assembly faulty. No +B wire harness faulty. Power amplifier faulty. No BE−174 BODY ELECTRICAL 11 Tape Player − AUDIO SYSTEM POWER COMING IN, BUT TAPE PLAYER NOT OPERATING Function OK if different cassette tape inserted? No Is radio operating normally? Yes Yes No Does continuity exist in speaker wire harness? Yes Temporarily install another speaker. Function OK? No Yes Cassette tape faulty. Radio assembly faulty. Speaker wire harness faulty. Speaker faulty. No Hiss noise from speaker? No Yes Power amplifier faulty. Recheck system after repair. Radio assembly faulty. Recheck system after repair. 12 Tape Player ANY SPEAKER DOES NOT WORK Is radio operating normally? No Is hiss noise produced by non−functioning speaker. No Yes Yes Temporarily install another speaker. Function OK? No Radio assembly or power amplifier faulty. Radio assembly faulty. Recheck system after repair. Speaker wire harness faulty. Does continuity exist in speaker wire harness? Yes Radio assembly faulty. No Yes Speaker faulty. BE−175 BODY ELECTRICAL 13 Tape Player − AUDIO SYSTEM SOUND QUALITY POOR (VOLUME FAINT) Function OK if different cassette tape inserted? No Operates normally after cleaning the heads? No Yes Yes Is radio operating normally? Yes No Is speaker properly installed? Yes No Temporarily install another speaker. Function OK? Cassette tape faulty. Head dirty. Radio assembly faulty. Install properly. Speaker faulty. Yes No Radio assembly faulty. 14 Tape Player TAPE JAMMED MALFUNCTION WITH TAPE SPEED OR AUTO−REVERSE Function OK if different tape (less than 120 mins.) is inserted? No Is there a foreign object inside tape player? No Operates normally after cleaning the heads? No Radio assembly faulty. Yes Yes Yes Cassette tape faulty. Remove foreign object. Head dirty. BE−176 BODY ELECTRICAL 15 Tape Player − AUDIO SYSTEM CASSETTE TAPE WILL NOT BE EJECTED Is tape player operating normally? No Yes Is auto search button of radio operating normally? Yes No Check if RADIO No.1 fuse is OK? NG OK Is power supplied to +B terminal of power amplifier? No Yes Is power supplied to +B terminal of radio receiver? No Yes Cassette tape jammed. Radio assembly faulty. Replace fuse. +B wire harness faulty. Power amplifier faulty. Radio assembly faulty. 16 CD Player CD CANNOT BE INSERTED Is CD already inserted? Yes No Is auto search button of radio operating normally? Yes Eject CD. Is power supplied to +B terminal of CD player? No Radio assembly faulty. No Yes Check if GND (wire harness side) of CD player grounded normally? NG OK CD player faulty. Check if RADIO No.1 fuse is OK? OK NG Is power supplied to +B terminal of power amplifier? Yes No Check if GND (wire harness side) of radio assembly grounded normally? NG OK Radio assembly faulty. Replace fuse. +B wire harness faulty. BE−177 BODY ELECTRICAL 17 CD Player − AUDIO SYSTEM CD INSERTED, BUT NO POWER Yes Is radio operating normally? No Is power supplied to ACC terminal of CD player? No Radio assembly faulty. Yes CD player faulty. Check if RADIO No.2 fuse is OK? NG OK Is power supplied to ACC terminal of power amplifier? Yes Is power supplied to ACC terminal of radio assembly? Yes No No Replace fuse. ACC wire harness faulty. Power amplifier faulty. Radio assembly faulty. 18 CD Player POWER COMING IN, BUT CD PLAYER NOT OPERATING Is CD inserted with correct side up? No Yes Function OK if different CD inserted? Yes No Is radio operating normally? No Yes Insert correctly. CD faulty. Is temperature inside cabin hot? No Yes Has sudden temperature change occurred inside cabin? Yes No Protective circuit in operation. Formation of condensation due to temp. changes. CD player faulty. Dose continuity exist in speaker wire harness? Yes Temporarily install another speaker. Functions OK? No Yes Speaker wire harness faulty. Speaker faulty. No Hiss noise from speaker? Yes Radio assembly faulty. Recheck system after repair. No Power amplifier faulty. Recheck system after repair. BE−178 BODY ELECTRICAL 19 CD Player − AUDIO SYSTEM SOUND JUMPS Does sound jump only during strong vibration? No Is CD player properly installed? Yes Functions OK if different CD inserted? No Has sudden temperature change occurred inside cabin? No Jumping caused by vibration. Yes No Yes Yes Install properly. CD faulty. Formation of condensation due to temp. changes. CD player faulty. 20 CD Player SOUND QUALITY POOR (VOLUME FAINT) Function OK if different CD inserted? No Is radio operating normally? No Is speaker property installed? Yes Temporarily install another speaker. Functions OK? No Radio assembly or CD player or power amplifier faulty. Yes Yes No CD faulty. CD player faulty. Install properly. Speaker faulty. Yes BE−179 BODY ELECTRICAL 21 CD Player − AUDIO SYSTEM ANY SPEAKER DOES NOT WORK CD player faulty. Is radio operating normally? Yes No Is hiss noise produced by non−functioning speaker? Yes No Does continuity exist in speaker wire harness? Radio assembly faulty. Recheck system after repair. Speaker wire harness faulty. No Yes Speaker faulty. Temporarily install another speaker. Function OK? Yes No Power amplifier faulty. Recheck system after repair. 22 CD Player CD WILL NOT BE EJECTED Is auto search button of radio operating normally? Yes No Is power supplied to +B terminal No of CD player? Radio assembly faulty. Yes CD player faulty. Check if RADIO No.1 fuse is OK? OK Is power supplied to +B terminal of power amplifier? Yes Is power supplied to +B terminal of radio receiver? Yes Radio assembly faulty. Replace fuse. NG No No +B wire harness faulty. Power amplifier faulty. BE−180 BODY ELECTRICAL 23 Power Amplifier − AUDIO SYSTEM NO POWER COMING IN Is tape player operating normally? No Yes Replace fuse. Check if RAD−No.2 fuse is OK? OK NG ACC wire harness faulty. Is power supplied to ACC terminal of power amplifier? Yes Check if RAD−No.1 fuse is OK? OK Is power supplied to +B terminal of power amplifier? Yes Check if GND (wire harness side) of power amplifier grounded normally? Radio assembly faulty. No NG No NG Replace fuse. + B wire harness faulty. GND faulty. OK Is power supplied to ACC terminal of radio assembly? Yes Is power supplied to +B terminal of radio assembly? Yes Check if GND (wire harness side) of radio assembly grounded normally? OK Radio assembly faulty. No No NG Power amplifier or wire harness faulty. Power amplifier or wire harness faulty. GND faulty. BE−181 BODY ELECTRICAL 24 Power Amplifier − AUDIO SYSTEM POWER COMIMG IN, BUT WOOFER (POWER) AMPLIFIER NOT OPERATING Is tape player operating normally? No Check if RAD−No.2 fuse is OK? OK Is power supplied to ACC terminal of power amplifier? Yes Check if RAD−No.1 fuse is OK? OK Yes NG No NG Is power supplied to +B terminal of power amplifier? Yes Check if GND (wire harness side) of power amplifier grounded normally? No NG Radio assembly faulty. Replace fuse. ACC wire harness faulty. Replace fuse. + B wire harness faulty. GND faulty. OK Is power supplied to ACC terminal of radio assembly? Yes No Is power supplied to +B terminal of radio assembly? Yes Check if GND (wire harness side) of radio assembly grounded normally? Power amplifier faulty. Power amplifier faulty. No GND faulty. NG OK Is there continuity in speaker wire harness? Yes Temporarily install another speaker. Functions OK? No Hiss noise from speaker? Yes Radio assembly faulty. Recheck system after repair. No Yes No Speaker wire harness faulty. Speaker faulty. Power amplifier faulty. Recheck system after repair. BE−182 BODY ELECTRICAL 25 Power Amplifier − AUDIO SYSTEM ANY SPEAKER DOES NOT WORK CD player faulty. Is radio operating normally? No Yes Is hiss noise produced by non−functioning speaker? No Yes Does continuity exist in speaker wire harness? Yes Temporarily install another speaker. Function OK? No Power amplifier faulty. Recheck system after repair. Radio assembly faulty. Recheck system after repair. Speaker wire harness faulty. No Speaker faulty. Yes BE−183 BODY ELECTRICAL 26 Noise − AUDIO SYSTEM NOISE OCCURS Does the noise occur only in the radio? Yes (It occurs in the cassette and CD.) No An electric environment. Does the noise occur in a particular place? No Is there any additional installation part around the glass imprinted antenna? (Sun shade film, telephone antenna etc.) Yes Does the noise stop by removing it? Yes Influence of the film or the noise radiation of the additional installation part. No Does the noise occur even pulling out the antenna cord from the radio? Refer to No.27. Check the radio. Yes No Does the noise occur even after pulling out the antenna terminal on the glass surface? Yes Noise mixing into the antenna cable. No Isn’t there any adhesive (Butyl rubber) stuck on the bases of the antenna terminal, defogger terminal and bus bar? Yes Failure of glass installation. Must plane the butyl rubber. Yes Interfering noise from the defogger line and choke coil. No Does the noise occur even after pulling out the defogger terminal? No Check the grounding of the antenna, antenna cord, coke coil, and noise filter. (See page BE−158) NG Grounding failure. OK Does the condition get better by replacing the choke coil? Replace the choke coil. Yes No Does the condition get better by replacing the antenna cord. No Noise rediates directly to the antenna from the generation source. Replace the antenna cord. Yes BE−184 BODY ELECTRICAL 27 Noise − AUDIO SYSTEM NOISE PRODUCED BY VIBRATION OR SHOCK WHILE DRIVING Install properly. Is speaker properly installed? No Yes Is speaker properly installed? No Yes Each system faulty. With vehicles stationary lightly tap each system. Is noise produced? Yes No Noise is produced from static eletricity accumulating in the vehicle body. 28 Noise NOISE PRODUCED WHEN ENGINE STARTS Whistling noise which becomes high−pitched when accelerator strongly depressed, disappears shortly after engine stops. Generator noise. Yes No Whining noise occurs when A/C is operating. No Scratching noise occurs during sudden acceleration, driving on rough roads or when ignition switch is turned ON. Yes Yes A/C noise. Fuel gauge noise. No Clicking sound is heard when horn button is pressed, then released. Whirring/grating sound is heard when pushed continuously. Yes Horn noise. No Murmuring sound stops when engine stops. No Tick−tack noise occurs in co−ordination with blinking offlasher. Yes Yes Ignition noise. Turn signal noise. No Noise occurs during window washer operation. No Yes Scratching noise occurs while engine is running, and continues a while even after engine stops. Yes Washer noise. Engine coolant temp. gauge noise. No Scraping noise in line with wiper beat. No Other type of noise Yes Wiper noise.
