Home

TROUBLESHOOTING

1. YES Function OK if different CD inserted m CD faulty no l YES YES AEE Is radio operating normally gt Is temperature inside cabin hot Protective circuit in operation no YES Has sudden temperature change gt Formation of NO occurred inside cabin condensation due to temp changes no CD player faulty Dose continuity exist in speaker wire harness NO J Speaker wire harness faulty ves Temporarily install another speaker Functions OK e Speaker faulty No Hiss noise from speaker N ee Power amplifier faulty ves Recheck system after repair Radio assembly faulty Recheck system after repair 2003 MR2 RM967U Author Date 1526 BE 87 BODY ELECTRICAL AUDIO SYSTEM 19 CD Player SOUND JUMPS ase YES SERT Does sound jump only during strong vibration m Jumping caused by vibration NO NO Is CD player properly installed Install properly YES rT YES Functions OK if different CD inserted CD faulty NO Has sudden temperature change occurred inside cabin YES Dew condensation due to temp changes NO CD player faulty 20 CD Player SOUND QUALITY POOR VOLUME FAINT Saas YES Function OK if different CD inserted r CD faulty
2. Author Date 1530 BODY ELECTRICAL AUDIO SYSTEM BE 91 25 Power Amplifier ANY SPEAKER DOES NOT WORK Is radio operating normally YES no CD player faulty Is hiss noise produced by non functioning speaker YES No Radio assembly faulty Recheck system after repair Does continuity exist in speaker wire harness NO YES Speaker wire harness faulty Temporarily install another speaker Function OK YES Speaker faulty no Power amplifier faulty Recheck system after repair 2003 MR2 RM967U Author Date 1531 BE 92 BODY ELECTRICAL AUDIO SYSTEM 26 Noise NOISE OCCURS Does the noise occur only in the radio NO a er It occurs in the cassette and CD Refer to No 27 An electric environment Does the noise stop by removing it Influence of the window tint or the noise radi ation of the additional installation part Check the radio Noise mixing into the antenna cable Glass installation Remove the butyl rubber Interfering noise from the defogger line and choke coil Grounding failure Replace the choke coil Replace the antenna cord v
3. FEW PRESET TUNING BANDS Problem with radio wave signals or location YES Poor signals poor location no Is power for the antenna being output from the radio assembly YES Radio assembly faulty no NO Are both AM and FM defective YES Go to No 16 YES Is tape player operating normally Radio assembly faulty NO Temporarily install another speaker Functions OK YES _ Speaker faulty NO NO a Hiss noise from speaker Power amplifier faulty l YES Recheck system after repair Radio assembly faulty Recheck system after repair 2003 MR2 RM967U Author Date 1519 BE 80 BODY ELECTRICAL _AUDIO SYSTEM 6 Radio POOR RECEPTION Is the condition bad in comparison with other vehicles EES An electric wave environment is bad no Are there any additional installation parts YES _ Does the condition get better if removing Window tint telephone antenna etc additional installation parts YES NO Influence of additional installation parts Check if there is any scratch and breaking of a wire on the glass YES j Repair See page BE 52 antenna and the defogger pattern visual check tester See page BE 67 no Is the contact of the plug jack of the radio OK LNO Take a measure for contact YES Does the con
4. NO YES Is radio operating normally gt CD player faulty NO NO Is speaker property installed Install properly YES YES gt Temporarily install another speaker Functions OK Speaker faulty no Radio assembly or CD player or power amplifier faulty 2003 MR2 RM967U Author Date 1527 BE 88 BODY ELECTRICAL AUDIO SYSTEM 21 CD Player ANY SPEAKER DOES NOT WORK YES Is radio operating normally CD player faulty no ae YES Is hiss noise produced by non functioning speaker m Radio assembly faulty NO Recheck system after repair Does continuity exist in speaker wire harness LANS Speaker wire harness faulty YES YES Temporarily install another speaker gt a Speaker faulty Function OK ro Power amplifier faulty Recheck system after repair 22 CD Player CD WILL NOT BE EJECTED YES Is auto search button of radio gt Is power supplied to B terminal NO Radio assembly operating normally of CD player faulty YES NO CD player faulty Check if ECU B1 and RADIO1 fuses are OK LNG Replace fuse s ox a NO Is power supplied to B terminal of power amplifier m B wire harness faulty YES A l F NO 7 Is power supplied to B terminal of radio r
5. no YES Is radio operating normally Radio assembly faulty NO ae ge NO Does continuity exist in speaker wire harness Speaker wire harness faulty YES Temporarily install another speaker YES J Speaker faulty Function OK no NO Hiss noise from speaker Power amplifier faulty YES Recheck system after repair Radio assembly faulty Recheck system after repair 12 Tape Player ANY SPEAKER DOES NOT WORK YES Is radio operating normally m Radio assembly faulty no a YES Is hiss noise produced by non functioning speaker m Radio assembly faulty Recheck system after repair NO N Does continuity exist in speaker wire harness SR Speaker wire harness faulty YES aaa YES Temporarily install another speaker c Speaker faulty Function OK No Radio assembly or power amplifier faulty 2003 MR2 RM967U Author Date 1523 BE 84 BODY ELECTRICAL AUDIO SYSTEM 13 Tape Player SOUND QUALITY POOR VOLUME FAINT Function OK if different cassette tape inserted no YES Cassette tape faulty Operates normally after cleaning the heads YES J Head dirty no Is radio operating normally YES JJ Radio assembly faulty no Is speaker properly installed Oe J Install properly YES Temporarily instal
6. BE 75 BODY ELECTRICAL AUDIO SYSTEM 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 re placement part spare part HINT This inspection procedure is a simple troubleshooting which should be carried out on the vehicle during sys tem operation and was prepared on the assumption of system component troubles except for the wires and connectors etc Always inspect the part with trouble taking the following items into consideration e Open or short circuit of the wire harness e Connector or terminal connection fault probe Radio Radio not operating when power switch turned to ON 1 BE1DD 02 Display indicates when power switch turned to ON but no sound including noise is produced Noise present but AM FM not operating Any speaker does not work Any AM or FM does not work _ Few preset turing bands Reception poor Sound quality poor Preset memory erased 8 Tape player Cassette tape cannot be inserted 10 11 12 13 14 15 16 17 Power coming in but CD player not operating 18 P Sunes o o Po Cassette tape inserted but no power es Power coming in but tape player not operating Po Any speaker does not work Po Sound quality poor ot Tape jammed malfunction with tape speed or auto reverse fC
7. Cassette tape will not eject CD cannot be inserted CD inserted but no power Sound quality poor Volume faint 2 21 2 2 24 2 2 2 2 Any speaker does not work CD will not be ejected Power amplifier No power coming in Power coming in but power amplifier not operating Po Any speaker does not work Noise Noise occurs eh Noise produced by vibration or shock while driving Noise produced when engine starts The term AM includes LW MW and SW and the term FW includes UKW 2003 MR2 RM967U Author Date 1515 BE 76 BODY ELECTRICAL AUDIOSYSTEM 1 Radio RADIO NOT OPERATING WHEN POWER SWITCH TURNED TO ON Is tape player operating normally _YES J Radio assembly faulty NO Check if ACC and RADIO2 fuses are OK NG y Replace fuse s Jox Check if ACC relay is OK NG Replace ACC relay See page BE 10 Jok Is power supplied to ACC terminal of power amplifier LNO ACC wire harness faulty ves Check if ECU B1 and RADIO1 fuses are OK _NG Replace fuse s Jox Is power supplied to B terminal of power amplifier Noose wire harness faulty ves Check if GND wire harness side of power amplifier NG JGN faulty grounded normally or Is power supplied to ACC terminal of radio assembly ieee Power amplifier or ACC wire ha
8. MPLIFIER NOT Is tape player operating normally YES Radio assembly faulty Iwo Check if ACC and RADIO2 fuses are OK oe Replace fuse s ox Check if ACC relay is OK NG Replace ACC relay See page BE 10 or Is power supplied to ACC terminal of power amplifier N j N ACC wire harness faulty ves NG Check if ECU B1 and RADIO1 fuses are OK m Replace fuse s ie Is power supplied to B terminal of power amplifier oe E wire harness faulty ves Check if GND wire harness side of power amplifier grounded normally LNG GND faulty fox NO Is power supplied to ACC terminal of radio assembly Power amplifier faulty ves Is power supplied to B terminal of radio assembly N a Power amplifier faulty ves Check if GND wire harness side of radio assembly grounded normally NG m GND faulty ox Is there continuity in speaker wire harness NO j Speaker wire harness faulty ves YES Temporarily install another speaker Functions OK m Speaker faulty Ino Hiss noise from speaker NO 7 Power amplifier faulty ves Recheck system after repair Radio assembly faulty Recheck system after repair 2003 MR2 RM967U
9. ag GND faulty ox Does continuity exist in speaker wire harness RING Speaker wire harness faulty ves Temporarily install another speaker Functions OK MES Speaker faulty no Hiss noise from speaker N CB Power amplifier faulty ves Recheck system after repair Radio assembly faulty Recheck system after repair 2003 MR2 RM967U Author Date 1517 BE 78 BODY ELECTRICAL AUDIO SYSTEM 3 Radio NOISE PRESENT BUT AM FM NOT OPERATING Go to No 25 If radio side faulty Radio fault adio faulty 4 Radio ANY SPEAKER DOSE NOT WORK Is tape player operating normally betes Radio assembly faulty no Is hiss noise produced by non functioning speaker LYES Radio assembly faulty no Recheck system after repair Does continuity exist in speaker wire harness NO Speaker wire harness faulty YES Temporarily install another speaker Functions OK ES Speaker faulty no Power amplifier faulty Recheck system after repair 2003 MR2 RM967U Author Date 1518 BE 79 BODY ELECTRICAL AUDIO SYSTEM 5 Radio ANY AM OR FM DOES NOR WORK
10. dition get better by using the outer antenna ONO Check the radio such as pillar antenna YES Is the contact of the antenna terminal on the glass surface and LNG Take a measure for contact the defogger terminal YES Is the continuity of the antenna cord OK See Replace the antenna cord YES Check the grounding of the antenna antenna cord NG Grounding failure choke coil and noise filter See page BE 67 oK Does the condition get better by replacing the choke coil a Replace the choke coil no YES Does the condition get better by replacing the antenna cord Replace the antenna cord xo Replace the glass 2003 MR2 RM967U Author Date 1520 BE 81 BODY ELECTRICAL AUDIO SYSTEM 7 Radio SOUND QUALITY POOR NO YES Is sound quality always poor Is sound quality poor in certain Poor signals poor location areas only NO YES Is tape player operating normally YES NO Radio assembly or power Radio assembly faulty amplifier faulty YES Is tape player operating normally _ ___ Radio assembly faulty no NO Is speaker properly installed gt Install properly ves Tem
11. e NOISE PRODUCED WHEN ENGINE STARTS Whistling noise which becomes high pitched with accelerator strongly depressed has gone shortly af ter engine stops L wes Generator noise NO Whining noise occurs when A C is operating YES J AIC noise No n YES Scratching noise occurs during sudden acceleration driv gt Fuel gauge noise ing on rough roads or when ignition switch is turned ON NO Clicking sound is heard when horn button is pressed then released Whirring grating sound is heard when pushed continuously YES gt Horn noise KE Murmuring sound stops when engine stops YES a Ignition noise NO Tick tack noise occurs in co ordination with blinking of flasher YES Turn signal noise NO Noise occurs during window washer operation YES Washer noise ine Scratching noise occurs while engine is running and continues a while even after engine stops YES Engine coolant temp gauge noise No Scraping noise in line with wiper beat E Wiper noise NO Other type of noise 2003 MR2 RM967U Author Date 1533
12. eceiver Power amplifier faulty YES Radio assembly faulty 2003 MR2 RM967U Author Date 1528 BE 89 BODY ELECTRICAL AUDIO SYSTEM 23 Power Amplifier NO POWER COMING IN YES F Is tape player operating normally s Radio assembly faulty wo Check if ACC and RADIO2 fuses are OK LNG Replace fuse s Jox Check if ACC relay is OK BN Replace ACC relay See page BE 10 ok Is power supplied to ACC terminal of power amplifier ean ACC wire harness faulty ves Check if ECU B1 and RADIO1 fuses are OK cae Replace fuse s Jon Is power supplied to B terminal of power amplifier NO a5 wire harness faulty ves Check if GND wire harness side of power amplifier grounded normally NG GND faulty ok Is power supplied to ACC terminal of radio assembly NO Power amplifier or wire harness faulty ves Is power supplied to B terminal of radio assembly NO Power amplifier or wire harness faulty ves Check if GND wire harness side of radio assembly grounded normally BEEN GND faulty ok Radio assembly faulty 2003 MR2 RM967U Author Date 1529 BE 90 BODY ELECTRICAL AUDIO SYSTEM 24 Power Amplifier OPERATING POWER COMING IN BUT WOOFER POWER A
13. es Does the noise occur in a particular place ES no ws YES Is there any additional installation part around the glass imprinted antenna Window tint telephone antenna etc NO YES Does the noise occur even after pulling out the ooo antenna cord from the radio no YES Does the noise occur even after pulling out the ol antenna terminal on the glass surface NO Isn t there any adhesive Butyl rubber stuck YES on the bases of the antenna terminal defogger terminal and bus bar no Does the noise occur even after pulling out YES the defogger terminal me no l NG Check the grounding of the antenna a a antenna cord choke coil and noise filter See page BE 67 OK YES Does the condition get better by replacing _ _ the choke coil xo YES Does the condition get better by replacing ad the antenna cord xo Noise radiates directly from the generation source to the antenna 2003 MR2 RM967U Author Date 1532 BODY ELECTRICAL BE 93 AUDIO SYSTEM 27 Noise NOISE PRODUCED BY VIBRATION OR SHOCK WHILE DRIVING Is speaker properly installed YES Is each system correctly installed YES With vehicles stopped lightly tap each system Is noise produced LNO Install properly NO YES JJ Each system faulty No Noise is produced from static electricity accumulating in the vehicle body 28 Nois
14. l another speaker YES Speaker faulty Function OK NO Radio assembly faulty 14 Tape Player TAPE JAMMED MALFUNCTION WITH TAPE SPEED OR AUTO REVERSE Function OK if different tape less than 120 min is inserted YES Cassette tape faulty no Is there a foreign object inside tape player YES a Remove foreign object no Operates normally after cleaning the heads YES a Head dirty no Radio assembly faulty 2003 MR2 RM967U Author Date 1524 BODY ELECTRICAL AUDIO SYSTEM BE 85 15 Tape Player CASSETTE TAPE WILL NOT BE EJECTED Is tape player operating normally NO YES gt Cassette tape jammed Is auto search button of radio operating normally YES No Radio assembly faulty Check if ECU B1 and RADIO1 fuses are OK NG ox Replace fuse s Is power supplied to B terminal of power amplifier NO YES m B wire harness faulty Is power supplied to B terminal of radio receiver NO YES Power amplifier faulty Radio assembly faulty 16 CD Player CD CANNOT BE INSERTED Is CD already inserted YES m Eject CD xo Is auto search button of radio operating _YES normally Is power supplied to B terminal of CD player ves NO Check if GND wire harness side of CD player gro
15. porarily install another speaker Functions OK a Speaker faulty no Radio assembly or power amplifier faulty Recheck system after repair 8 Radio PRESET MEMORY DISAPPEARS l 7 YES Can cassette tape be inserted in tape player Radio assembly faulty NO Check if ECU B1 and RADIO1 fuses are OK NG p Replace fuse s OK Is power supplied to B terminal of power amplifier NO af B wire harness faulty YES Check if GND wire harness side of power amplifier _ NG gt GND faulty grounded normally OK Is power supplied to B terminal of radio assembly LNO Power amplifier faulty YES Check if GND wire harness side of radio assembly LNG a Power amplifier faulty grounded normally ox Radio assembly faulty 2003 MR2 RM967U Author Date 1521 BE 82 BODY ELECTRICAL AUDIO SYSTEM 9 Tape Player CASSETTE TAPE CANNOT BE INSERTED Is there a foreign object inside tape player YES Remove foreign object no Is auto search button radio operating normally YES J Radio assembly faulty no Check if ECU B1 and RADIO1 fuses are OK NG J Replace fuse s ox Is power supplied to B terminal of power amplifier NO y B wire harness faulty YES Check if GND wire harness side of power amplifier grounded normally NG gt GND faulty oK Is power supplied to B terminal of
16. radio assembly NO e Power amplifier faulty YES NG Check if GND wire harness side of radio assembly grounded Power amplifier faulty normally Jox Radio assembly faulty 10 Tape Player CASSETTE TAPE INSERTED BUT NO POWER Is radio operating normally LES Radio assembly faulty no Check if ACC and RADIO2 fuses are OK NG gt Replace fuse s Jok NG Check if ACC relay is OK Replace ACC relay See page BE 10 ok NO Is power supplied to ACC terminal of power amplifier ACC wire harness faulty ves NG Check if ECU B1 and RADIO1 fuses are OK Replace fuse s Jox Is power supplied to B terminal of radio assembly NO m B wire harness faulty ves Is power supplied to ACC terminal of radio assembly NO Power amplifier faulty ves Radio assembly faulty 2003 MR2 RM967U Author Date 1522 BE 83 BODY ELECTRICAL AUDIO SYSTEM 11 Tape Player POWER COMING IN BUT TAPE PLAYER NOT OPERATING Canad YES Function OK if different cassette tape inserted m Cassette tape faulty
17. rness faulty ves Is power supplied to B terminal of radio assembly EN Power amplifier or B wire harness faulty ves Check if GND wire harness side to radio assembly is OK LING GND faulty Jox Radio assembly faulty 2003 MR2 RM967U Author Date 1516 BODY ELECTRICAL AUDIO SYSTEM BE 77 2 Radio DISPLAY INDICATES WHEN POWER SWITCH TURNED TO ON BUT NO SOUND INCLUDING NOISE IS PRODUCED Is tape player operating normally YES l Radio assembly faulty wo Check if ACC and RADIO2 fuses are OK LNG Replace fuse s or Check if ACC relay is OK NG ok m Replace ACC relay See page BE 10 Is power supplied to ACC terminal of power amplifier NO J ACC wire harness faulty YES Check if ECU B1 and RADIO1 fuses are OK LNG J Replace fuse s ok Is power supplied to B terminal of power amplifier o B wire harness faulty ves Check if GND wire harness side of power amplifier grounded normally LNG e GND faulty 0 Is power supplied to ACC terminal of radio receiver NO a Power amplifier faulty ves Is power supplied to B terminal of radio receiver _NO J Power amplifier faulty ves Check if GND wire harness side of power amplifier grounded normally Cu
18. unded normally NO NG Radio assembly faulty J oK CD player faulty NG Check if ECU B1 and RADIO1 fuses are OK ok 7 Replace fuse s Is power supplied to B terminal of power amplifier NO YES m B wire harness faulty C Check if GND wire harness side of radio assembly grounded normally Jor Radio assembly faulty 2003 MR2 RM967U Author Date 1525 BE 86 BODY ELECTRICAL AUDIO SYSTEM 17 CD Player CD INSERTED BUT NO POWER i YES Is radio operating normally gt Is power supplied to ACC NO Radio assembly terminal of CD player faulty NO ves CD player faulty Check if ACC and RADIO2 fuses are OK ENG Replace fuse s ok Check if ACC relay is OK NG 1 Replace ACC relay See page BE 10 ok Is power supplied to ACC terminal of power amplifier LN ACC wire harness faulty ves NO Is power supplied to ACC terminal of radio assembly gt Power amplifier faulty ves Radio assembly faulty 18 CD Player POWER COMING IN BUT CD PLAYER NOT OPERATING Is CD inserted with correct side up NO m Insert correctly YES

TROUBLESHOOTING

Contents

Download Pdf Manuals

Related Search

Related Contents