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1. Detail Display Mode Refer to b CHEC Detail Display Mode Refer to c OLD Detail Result Old Display Mode Chs gt Refer to d Indicates a switch operation A long beep 3 sec CLr After 3 sec i Memory Clear Mode s Tean e After the memory is cleared only the physical address is displayed cyclically e When re checking ch1 switch is pressed in that condition the result is also displayed as shown above 2003 TOYOTA TACOMA RM1002U Author Date 2336 BE 70 BODY ELECTRICAL AUDIOSYSTEM d ECHN Detail Display Mode Screen Service Check Mode i CLr ee E J ST cas ECHN Detail Display Mode Lro Details for 1st Component DTC Refer to diagnostic trouble code chart COdE pee TUNE UD ee Address LT re et Refer to diagnostic eae code chart 2 Auxiliary a Details for 2nd panai CUNE UD eer Connection Check Code C Indicates a switch operation Detail code is displayed cyclically 2003 TOYOTA TACOMA RM1002U Author Date 2337 BE 71 BODY ELECTRICAL AUDIO SYSTEM e CHEC Detail Display Mode Screen nE f CHEC Detail Display Mode DTC Refer to diagnostic trouble code chart Details for 1st Component Detail code is displayed cyclically DTC Refer to diagnostic trouble code chart Details for 2nd NEDO Auxiliary Code 1 Comp
2. No Temporarily install another speaker Functions OK is Speaker faulty Yes No Radio assembly or CD player or power amplifier faulty 2003 TOYOTA TACOMA RM1002U Author Date 2356 BE 90 BODY ELECTRICAL AUDIO SYSTEM 21 CD Player ANY SPEAKER DOES NOT WORK Is radio operating normally g CD player faulty No Yes Is hiss noise produced by non functioning speaker _____ Radio assembly faulty No Yes Recheck system after repair Does continuity exist in speaker wire harness Speaker wire harness faulty No Yes Temporarily install another speaker Speaker faulty 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 Is power supplied to B terminal Radio assembly operating normally Yes of CD player No faulty No Yes CD player faulty Check if DOME fuse is OK Replace fuse Is power supplied to B terminal of power amplifier B wire harness faulty No Yes Is power supplied to B terminal of radio receiver Power amplifier faulty No Yes Radio assembly faulty 2003 TOYOTA TACOMA RM1002U Author Date 2357 BODY ELECTRICAL
3. BE 91 AUDIO SYSTEM 23 Power Amplifier NO POWER COMING IN Is tape player operating normally g Radio assembly faulty No Yes Check if ACC fuse is OK __ Replace fuse ok NG Is power supplied to ACC terminal of power amplifier Lg ACC wire harness faulty Yes No Check if DOME fuse is OK __ Replace fuse Jo NG Is power supplied to B terminal of power amplifier e B wire harness faulty K No Check if GND wire harness side of power amplifier grounded normally ND faulty Ina e aulty OK Is power supplied to ACC terminal of radio assembly ____ Power amplifier or wire harness faulty ie No Is power supplied to B terminal of radio assembly Power amplifier or wire harness faulty No he Check if GND wire harness side of radio assembly grounded normally LT GND faulty NG ek Radio assembly faulty 2003 TOYOTA TACOMA RM1002U Author Date 2358 BE 92 BODY ELECTRICAL AUDIO SYSTEM 24 Power Amplifier OPERATING POWER COMING IN BUT WOOFER POWER AMPLIFIER NOT Is tape player operating normally gt Radio assembly faulty No Yes Check if ACC fuse is OK __ Replace fuse OK NG Is power supplied to A
4. Functions OK Speaker faulty Ne Yes Power amplifier faulty Recheck system after repair 2003 TOYOTA TACOMA RM1002U Author Date 2347 BODY ELECTRICAL AUDIO SYSTEM BE 81 5 Radi ANY AM OR FM DOES NOR WORK acio FEW PRESET TUNING BANDS Problem with radio wave signals or location L Poor signals poor location No Yes Is power for the antenna being output from the radio assembly _ Radio assembly faulty No Yes Are both AM and FM defective X O Yes Go to No 26 Is tape player operating normally __ Radio assembly faulty No Yes Temporarily install another speaker Functions OK as n Speaker faulty No Hiss noise from speaker 7 _ Power amplifier faulty Yes No Recheck system after repair Radio assembly faulty Recheck system after repair 2003 TOYOTA TACOMA RM1002U Author Date 2348 BE 82 BODY ELECTRICAL _AUDIO SYSTEM 6 Radio POOR RECEPTION Is the condition bad in comparison with other vehicles m An electric wave environment is bad Yes No Are there any additional installation parts __ Does the condition get better if Sun shade film telephone antenna etc Yes removing them No Yes Influ
5. OK _ Replace fuse Jox NG Is power supplied to ACC terminal of power amplifier Lg ACC wire harness faulty Yes me Check if DOME fuse is OK __ Replace fuse E NG Is power supplied to B terminal of power amplifier B wire harness faulty Yes me Check if GND wire harness side of power amplifier is L OSIGND faulty grounded normally NG ok Is power supplied to ACC terminal of radio assembly ___ Power amplifier or ACC wire harness faulty Yes Mo Is power supplied to B terminal of radio assembly L Power amplifier or B wire harness faulty Yes No Check if GND wire harness side to radio assembly is OK GND faulty NG E Radio assembly faulty 2003 TOYOTA TACOMA RM1002U Author Date 2345 BODY ELECTRICAL BE 79 AUDIO SYSTEM 2 Radio DISPLAY INDICATES WHEN POWER SWITCH TURNED TO ON BUT NO SOUND INCLUDING NOISE IS PRODUCED Is tape player operating normally t Radio assembly faulty No Yes Check if ACC fuse is OK __ Replace fuse OK NG Is power supplied to ACC terminal of power amplifier ACC wire harness faulty Yes No Check if DOME fuse is OK _ Replace fuse ox NG Is power supplied to B terminal of power amplifier B wire harness faulty ie No Check if GND wire harness side of power amplifier is grounded no
6. is given to each function comprising the inner system of the AVC LAN a Physical address 190 Radio receiver assembly HINT e 1 Even if no failure is detected it may be stored depending on the battery condition or voltage for starting an engine e 2 It is stored when 180 sec has passed after the power supply connector is pulled out after engine start e 3 It may be stored when the engine key is turned 1 min again after engine start e 4 It may be stored when the engine key is turned again after engine start e 5 When 210 sec has passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON this code is stored n ee address 01 Communication control Diagnosis content Countermeasure and inspected parts Absence of Master No Response to Connection Check Last Mode Error No Response to ON OFF Instruction Mode Status Error Transmission Error 2003 TOYOTA TACOMA RM1002U Component in which this code is recorded has been disconnected from system with ignition in ACC or ON Or when this code was recorded multi display assembly was disconnected Component shown by auxiliary code is or had been disconnected from system after engine is start D9 Component operated sounds and or images were provided before engine stop is or has been disconnected with ignition switch in ACC or ON No response is identified when changing mode aud
7. is inserted L Cassette tape faulty No Yes Is there a foreign object inside tape player Remove foreign object No Yes Operates normally after cleaning the heads __ Head dirty No Yes Radio assembly faulty 2003 TOYOTA TACOMA RM1002U Author Date 2353 BE 87 BODY ELECTRICAL AUDIO SYSTEM 15 Tape Player CASSETTE TAPE WILL NOT BE EJECTED Is tape player operating normally _ Cassette tape jammed Yes No Is auto search button of radio operating normally g Radio assembly faulty x Yes Check if DOME fuse is OK i Replace fuse 0K NG Is power supplied to B terminal of power amplifier B wire harness faulty Yes No Is power supplied to B terminal of radio receiver ss Power amplifier faulty Yes No Radio assembly faulty 16 CD Player CD CANNOT BE INSERTED Is CD already inserted m Eject CD No Yes Is auto search button of radio operating normally Yes of CD player s power supplied to B terminalL______ Radio assembly faulty No res No Check if GND wire harness side of CD player grounded NG normally ee CD player faulty Check
8. BE 67 BODY ELECTRICAL AUDIO SYSTEM TROUBLESHOOTING 1 DIAGNOSIS FUNCTION a Diagnosis start up For shifting to diagnosis mode push CD button 3 times with pressing 1 and 6 of TRUCK TUNE APS button at the same time while the audio power is OFF and ACC is ON In diagnosis mode by pressing CD button for 2 seconds or turning the ignition key OFF the diagnosis mode is released BE240 01 lt Example gt TUNE UP and DOWN buttons CD button H LOGIC CONTROL DECK OO Boley ENA 4 button 6 button b Service check mode 1 After the diagnosis start up the system enters service check mode when TUNE UP switch is pressed 2 Error codes over tuner and connected equipment are displayed on the screen of tuner Results for each check are displayed as follows e good No DTC is detected for both System Check Confirmation and Diagnosis Memory Re sponse e nCon The Component does not respond to the Diagnosis On Instruction command Applicable to only the system where connected components are limited to be used ECHn Application of new version has been confirmed by the Diagnosis On Check and there is one or more DTC which indicates Replacement in the System Check Result Re sponse or Diagnosis Memory Response e CHEC Application of new version has been confirmed by the Diagnosis On Che
9. CC terminal of power amplifier ACC wire harness faulty Yes No Check if DOME fuse is OK _ Replace fuse ox NG Is power supplied to B terminal of power amplifier B wire harness faulty Rg No Check if GND wire harness side of power amplifier grounded normally GND faulty NG i Is power supplied to ACC terminal of radio assembly __ Power amplifier faulty kg No Is power supplied to B terminal of radio assembly _ Power amplifier faulty Yes No Check if GND wire harness side of radio assembly grounded normally m GND faulty NG OR Is there continuity in speaker wire harness I Speaker wire harness faulty ves No Temporarily install another speaker Functions OK _ Speaker faulty No Yes Hiss noise from speaker __ Power amplifier faulty Yes No Recheck system after repair Radio assembly faulty Recheck system after repair 2003 TOYOTA TACOMA RM1002U Author Date 2359 BODY ELECTRICAL AUDIO SYSTEM BE 93 25 Power Amplifier ANY SPEAKER DOES NOT WORK Is radio operating normally CD player faulty No Yes Is hiss noise produced by non functioning speaker Ne Yes Radio assembly fau
10. M b Physical address 440 Stereo component amplifier HINT BE 75 e 1 Even if no failure is detected it may be stored depending on the battery condition or voltage for starting an engine e 2 It may be stored when the engine key is turned 1 min again after engine start e 3 It may be stored when the engine key is turned again after engine start e 4 When 210 sec has passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON this code is stored 2 address 01 Communication control Diagnosis content Countermeasure and inspected parts Absence of Master Communication Check Error Transmission Error Master Reset Momentary Interruption Master Error Registration Completion Instruction Error Audio processor ON error 2003 TOYOTA TACOMA RM1002U Component in which this code is recorded has been disconnected from system with ignition in ACC or ON Or when this code was recorded multi display assembly was disconnected Component in which this code is recorded is or was disconnected from system after en gine start Or when recording this code multi display assembly was disconnected Transmission to component shown by auxil iary code has been failed Detecting this DTC does not necessarily mean actual failure After engine is started multi display assem bly was disconnected from system Due to defective condition of component w
11. Recheck system after repair Power amplifier faulty Recheck system after repair 12 Tape Player ANY SPEAKER DOES NOT WORK Is radio operating normally No Yes Is hiss noise produced by non functioning speaker No Yes Does continuity exist in speaker wire harness Yes No Temporarily install another speaker Function OK Yes No Radio assembly or power amplifier faulty 2003 TOYOTA TACOMA RM1002U Radio assembly faulty Radio assembly faulty Recheck system after repair Speaker wire harness faulty Speaker faulty Author Date 2352 BE 86 BODY ELECTRICAL AUDIO SYSTEM 13 Tape Player SOUND QUALITY POOR VOLUME FAINT Function OK if different cassette tape inserted I Cassette tape faulty No Yes Operates normally after cleaning the heads Head dirty No Yes Is radio operating normally __ Radio assembly faulty Ne Yes Is speaker properly installed Install properly r Yes No Temporarily install another speaker Function OK i 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
12. ck and there is no DTC which indicates Replacement in the System Check Result Response or Diagnosis Memory Response but one or more DTC which indicated Check is identified e Old Application of old version is confirmed by the Diagnosis On Check and DTC is identified in the System Check Result Response or Diagnosis Memory Response 2003 TOYOTA TACOMA RM1002U Author Date 2334 BE 68 BODY ELECTRICAL AUDIO SYSTEM e nrES No response is identified to the System Check Start Instruction and Request for System Check Result commands HINT e Check the present and past condition of components by performing the System Check and collecting stored DTC memories e Check results shall be displayed as one of six following indications good ECHn CHEC nCon Old or nrES 2003 TOYOTA TACOMA RM1002U Author Date 2335 BE 69 BODY ELECTRICAL AUDIO SYSTEM c Display Screen for Service Check Example Connection parts physical address Multi Display P160 Radio Receiver P190 CD changer P360 Normal Mode Turn ignition switch ON Push the TAPE CD switch 3 times while pressing ch1 and ch6 switches HINT To exit from diagnosis mode press the TAPE CD switch for 1 7 sec or turn ignition switch to ACC or OFF 3 beeps Service Check Mode Physical Address When checking P160 is blinking ECHN
13. ck if GND wire harness side of radio assembly grounded normally Power amplifier faulty NG OK Radio assembly faulty 10 Tape Player CASSETTE TAPE INSERTED BUT NO POWER Is radio operating normally I Radio assembly faulty No Yes Check if ACC fuse is OK I Replace fuse Jon NG Is power supplied to ACC terminal of power amplifier Yes i ACC wire harness faulty No Check if DOME fuse is OK Replace fuse ok NG Is power supplied to B terminal of radio assembly I B wire harness faulty ie No Is power supplied to ACC terminal of radio assembly Power amplifier faulty Yes No Radio assembly faulty 2003 TOYOTA TACOMA RM1002U Author Date 2351 BODY ELECTRICAL AUDIO SYSTEM BE 85 POWER COMING IN BUT TAPE PLAYER NOT OPERATING 11 Tape Player Function OK if different cassette tape inserted No Yes Is radio operating normally No Yes Does continuity exist in speaker wire harness Cassette tape faulty Radio assembly faulty Yes Speaker wire harness faulty No Temporarily install another speaker Function OK Yes Speaker faulty is Hiss noise from speaker Yes No Radio assembly faulty
14. e chang occurred inside cabin Yes no Formation of condensation due to temp changes CD player faulty Dose continuity exist in speaker wire harness Yes __ Speaker wire harness faulty No Temporarily install another speaker Functions OK r Speaker faulty Yes No Hiss noise from speaker No _ Yes Power amplifier faulty Recheck system after repair Radio assembly faulty Recheck system after repair 2003 TOYOTA TACOMA RM1002U Author Date 2355 BODY ELECTRICAL BE 89 AUDIO SYSTEM 19 CD Player SOUND JUMPS Does sound jump only during strong vibration Jumping caused by vibration No Yes Is CD player properly installed Install properly Yes No Functions OK if different CD inserted Lg CD faulty No Has sudden temperature change occurred inside cabin J Ne Yes __ Formation of condensation due to Yes temp changes CD player faulty 20 CD Player SOUND QUALITY POOR VOLUME FAINT Function OK if different CD inserted ____ CD faulty No Yes Is radio operating normally is CD player faulty No Yes Is speaker property installed Install properly Yes
15. ence of additional installation parts Is the contact of the plug jack of the radio OK _ Take a measure for contact No Yes Does the condition get better by using the outer Check the radio antenna such as pillar antenna No Yes Is the continuity of the antenna cord OK Replace the antenna cord Yes No Check the grounding of the antenna antenna cord ea Grounding failure OK Does the condition get better by replacing the L Replace the antenna cord antenna cord Yes ee Exchange the glass 2003 TOYOTA TACOMA RM1002U Author Date 2349 BODY ELECTRICAL AU BE 83 DIO SYSTEM 7 Radio SOUND QUALITY POOR Is sound quality always bad H gt Is sound quality bad in certain Poor signals poor location No areas only Yes Yes i No Is tape player operating normally Yes No Radio assembly or power amplifier faulty Radio assembly faulty Is tape player operating normally ___ _ Radio assembly faulty No Yes Is speaker properly installed Yes No Temporarily install another speaker Functions OK Tis Radio assembly or power amplifier faulty Recheck system after repair al L Install properly ps Speaker faulty Yes 8 Radio PRESET MEMORY DISAPPEARS Can cassette tape be inserted in ta
16. if DOME fuse is OK __ Replace fuse OK NG Is power supplied to B terminal of power amplifier B wire harness faulty Yes Check if GND wire harness side of radio assembly grounded normally NG OK Radio assembly faulty 2003 TOYOTA TACOMA RM1002U Author Date 2354 BE 88 BODY ELECTRICAL AUDIOSYSTEM 17 CD Player CD INSERTED BUT NO POWER Is radio operating normally Yes No Is power supplied to ACC terminal of CD player No l Yes CD player faulty Check if ACC fuse is OK gt Radio assembly faulty E Replace fuse NG Is power supplied to ACC terminal of power amplifier Yes ACC wire harness faulty No Is power supplied to ACC terminal of radio assembly Yes g Power amplifier faulty No Radio assembly faulty 18 CD Player POWER COMING IN BUT CD PLAYER NOT OPERATING Is CD inserted with correct side up Ls Insert correctly No Yes Function OK if different CD inserted CD faulty Yes No Is radio operating normally No Is temperature inside cabin hot Protective circuit in Yes operation l No Yes Has sudden temperatur
17. ing items into consideration e Open or short circuit of the wire harness e Connector or terminal connection fault Radio not operating when power switch turned to ON Display indicates when power switch turned to ON but no sound including noise is produced Noise present but AM FM not operating o Any speaker does notwotk S AVAM or PM does notwork S Fewpesetwmingbands o O Receptionpoor S O o Soudauatiy poor S O Preset memory disappears o e ae ae o o Any speaker does notwok oS d e O P Scuncquatiypoor Tt es rr Cassette tape will not be ejected CD Player CD cannot be inserted Power coming in but tape player not operating Tape jammed malfunction with tape speed or auto reverse fo p O OOo o sO Coo o OO O o Ii Yeo witntte secs SSSSSSCSC S S S S Por coring btpower arp natopoaing O O eee The term AM includes LW MW and SW and the term FW includes UKW CD inserted but no power Power coming in but CD player not operating 2003 TOYOTA TACOMA RM1002U Author Date 2344 BE 78 BODY ELECTRICAL AUDIO SYSTEM 1 Radio RADIO NOT OPERATING WHEN POWER SWITCH TURNED TO ON Is tape player operating normally Wes Radio assembly faulty es No Check if ACC fuse is
18. io and visual mode change Detected when sound and picture does not change by button operation Dual alarm is detected Transmission to component shown by auxil iary code has been failed Detecting this DTC does not necessarily mean actual failure Author e Check harness for power supply system of multi display e Check harness for communication system of multi display e Check harness for power supply system of radio and player e Check harness for communication system of radio and player e Check harness for power supply system of component shown by auxiliary code e Check harness for communication system of component shown by auxiliary code e Check harness for power supply system of component shown by auxiliary code e Check harness for communication system of component shown by auxiliary code e Check harness for power supply system of component shown by auxiliary code e Check harness for communication system of component shown by auxiliary code e If error occurs again replace component shown by auxiliary code e Check harness for power supply of compo nent shown by auxiliary code e Check harness for communication system of component shown by auxiliary code If same auxiliary code is recorded in order component check harness for power supply and communication system of all compo nents shown by code Date 2340 BE 74 BODY ELECTRICAL AUDIO SYSTEM Master Reset Momentary Interrup
19. ith a display master function is switched to audio equipment Error occurs in communication between sub master audio and master component Registration Completion Instruction com mand from master cannot be received While source equipment is operating AMP output is stopped Author e Check harness for power supply of radio and player e Check harness for communication system of radio and player e Check harness for power supply of stereo component amplifier e Check harness for communication system of stereo component amplifier e Check harness for power supply of radio and player e Check harness for communication system of radio and player e Check harness for power supply of stereo component amplifier e Check harness for communication system of stereo component amplifier If same auxiliary code is recorded in order component check harness for power supply and communication system of all compo nents shown by code e Check harness for power supply of radio and player e Check harness for communication system of radio and player e Check harness for power supply of stereo component amplifier e Check harness for communication system of stereo component amplifier e lf this error occurs frequently replace mul ti display assembly e Check harness for power supply of multi display assembly e Check harness for communication system of multi display assembly e Check harness for communication
20. lty Recheck system after repair Does continuity exist in speaker wire harness Speaker wire harness faulty Yes No Temporarily install another speaker Functions OK Speaker faulty Yes Ne Power amplifier faulty Recheck system after repair 2003 TOYOTA TACOMA RM1002U Author Date 2360 BE 94 BODY ELECTRICAL AUDIO SYSTEM 26 Noise NOISE OCCURS Does the noise occur only in the radio Yes No It occurs in the cassette and CD Refer to No 27 Does the noise occur in a particular place An electric environment No Yes Is there any additional installation part around the glass imprinted antenna Sun shade film telephone antenna etc Does the noise stop by removing it Yes No Influence of the film or the noise radiation of the additional installation part Does the noise occur even pulling out the antenna cord from the radio Check the radio Yes Ne Does the noise occur even after pulling out the antenna terminal on the glass surface Noise mixing into the antenna cable Yes 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 Mus
21. onent Connection Check Code Number of Occurrence 1 i 1 There are some diagnostic codes witch might not be displayed In this case is displayed Cy Indicates a switch operation 2003 TOYOTA TACOMA RM1002U Author Date 2338 AUDIO SYSTEM BE 72 BODY ELECTRICAL f OLD Detail Display Mode Screen CHEC Detail Display Mode DTC Refer to diagnostic trouble code chart Details for 1st Component Detail code is displayed cyclically DTC Refer to diagnostic trouble code chart Details for 2nd D x 2 Auxiliary Code 1 Component Connection Check Code Number of Occurrence 1 1 There are some diagnostic Continued if more than one DTC is identified codes witch might not be displayed In this case is displayed Cy Indicates a switch operation g Recheck 1 Pressing the ch1 key in Service Check Mode executes recheck To display the recheck process follow the sequence indicated Display Screen for Service Check 2 ue 2003 TOYOTA TACOMA RM1002U Author Date 2339 2 DIAGNOSIS CODE LIST Three digit code shown in hexadecimal which is given to each component com prising the AVC LAN Physical address Logical address BODY ELECTRICAL AUDIO SYSTEM BE 73 Corresponding to the function individual symbols are specified Two digit code shown in hexadecimal which
22. pe player Ls Radio assembly faulty No Yes Check if DOME fuse is OK _ Replace fuse eas NG Is power supplied to B terminal of power amplifier m B wire harness faulty Yes No Check if GND wire harness side of power amplifier grounded normally m GND faulty 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 2003 TOYOTA TACOMA RM1002U NG Power amplifier faulty No FNG Power amplifier faulty Author Date 2350 BE 84 BODY ELECTRICAL AUDIO SYSTEM 9 Tape Player CASSETTE TAPE CANNOT BE INSERTED Is there a foreign object inside tape player m Remove foreign object No Yes Is auto search button of radio operating normally Radio assembly faulty No Yes Check if DOME fuse is OK Replace fuse OK NG Is power supplied to B terminal of power amplifier B wire harness faulty Yes No Check if GND wire harness side of power amplifier is grounded normally GND faulty OK NG Is power supplied to B terminal of radio assembly Power amplifier faulty Yes No Che
23. rmally GND faulty es NG Is power supplied to ACC terminal of radio receiver _ Power amplifier faulty co No Is power supplied to B terminal of radio receiver __ Power amplifier faulty Ee No Check if GND wire harness side of power amplifier grounded normally GND faulty NG OK Does continuity exist in speaker wire harness I Speaker wire harness faulty ves No Temporarily install another speaker Functions OK t Speaker faulty No Yes Hiss noise from speaker __ Power amplifier faulty Yes No Recheck system after repair Radio assembly faulty Recheck system after repair 2003 TOYOTA TACOMA RM1002U Author Date 2346 BE 80 BODY ELECTRICAL AUDIO SYSTEM 3 Radio NOISE PRESENT BUT AM FM NOT OPERATING Go to No 25 If radio side faulty EEA adio faulty 4 Radio ANY SPEAKER DOSE NOT WORK Is tape player operating normally _ Radio assembly faulty ine Yes Is hiss noise produced by non functioning speaker Radio assembly faulty No Yes Recheck system after repair Does continuity exist in speaker wire harness L Speaker wire harness faulty Yes No Temporarily install another speaker
24. system between multi display assembly and sub master component Since this DTC is provided for engineering purpose it may be detected when no actual failure exists e Check harness for power supply of multi display assembly e Check harness for communication system of multi display assembly Date 2342 BE 76 BODY ELECTRICAL AUDIO SYSTEM E2 ON OFF Instruction Parameter Error Error occurs in ON OFF controlling com Replace multi display assembly mand from multi display assembly Registration Request Transmission e Registration Request command is output Since this DTC is provided for engineering from slave component purpose it may be detected when no actual e Registration Connection Check Instruction failure exists Registration Request command is output from sub master component 2003 TOYOTA TACOMA RM1002U Author Date 2343 BE 77 BODY ELECTRICAL AUDIO SYSTEM 3 PROBLEM SYMPTOMS TABLE 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 trouble taking the follow
25. t plane the butyl rubber ne Does the noise occur even after pulling out the defogger terminal Yes Interfering noise from the defogger line and choke coil No Check the grounding of the antenna antenna cord choke coil and noise filter See page BE 64 Grounding failure NG 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 Replace the antenna cord Yes No Noise radiates directly to the antenna from the generation source 2003 TOYOTA TACOMA RM1002U Author Date 2361 BODY ELECTRICAL BE 95 AUDIO SYSTEM 27 Noise NOISE PRODUCED BY VIBRATION OR SHOCK WHILE DRIVING Is speaker properly installed Install properly Yes Is speaker properly installed z Yes No With vehicles stationary lightly tap each system Is noise produced sg Each system faulty Yes Ne Noise is produced from static electricity 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
26. tion After engine is started multi display assem e Check harness for power supply system of bly was disconnected from system multi display e Check harness for communication system of multi display e Check harness for power supply system of radio and player e Check harness for communication system of radio and player elf this error occurs frequently replace mul ti display assembly Slave Reset Momentary Interruption After engine is started slave component e Check harness for power supply of compo was disconnected from system nent shown by auxiliary code e Check harness for communication system of component shown by auxiliary code Master Error Due to defective condition of component e Check harness for power supply of multi with a display master function is switched to display assembly audio equipment e Check harness for communication system Error occurs in communication between of multi display assembly sub master audio and master component Check harness for communication system between multi display assembly and sub master component Registration Completion Instruction Error Registration Completion Instruction com Since this DTC is provided for engineering mand from master cannot be received purpose it may be detected when no actual failure exists Audio processor ON error While source equipment is operating AMP e Check harness for power supply of multi output is stopped display assembl
27. when A C is operating I A C noise No Yes Scratching noise occurs during sudden acceleration driving on rough roads or when ignition switch is turned ON Fuel gauge noise Yes No Clicking sound is heard when horn button is pressed then released Whirring grating sound is heard when pushed continuously Horn noise Yes Pe Murmuring sound stops when engine stops m Ignition noise No Yes Tick tack noise occurs in co ordination with blinking of flasher m Turn signal noise Yes No Noise occurs during window washer operation __ Washer noise No Yes Scratching noise occurs while engine is running and continues a while even after engine stops I Engine coolant temp gauge noise Yes No Scraping noise in line with wiper beat I Wiper noise No Yes Other type of noise 2003 TOYOTA TACOMA RM1002U Author Date 2362
28. y e Check harness for communication system of multi display assembly E2 ON OFF Instruction Parameter Error Error occurs in ON OFF controlling com Replace multi display assembly mand from multi display assembly Registration Request Transmission Registration Request command is output Since this DTC is provided for engineering from slave component purpose it may be detected when no actual Receiving Connection Check Instruction failure exists Registration Request command is output from sub master component Multiple Frame Abort Multiple frame transmission is aborted Since this DTC is provided for engineering purpose it may be detected when no actual failure exists z address 61 Cassette switch Diagnosis content Countermeasure and inspected parts Mechanical of Media Error Malfunction due to mechanical failure is e Inspect cassette tape identified e Replace radio and player Or cassette tape is cut or entangled 3 Logical address 62 CD player Diagnosis content Countermeasure and inspected parts No Disc Readout Disc cannot be read Inspect CD Error is detected in CD co al pe TA radio receiver assembly Eject Error CD cannot be CD cannot be ejected Replace radio receiver assembly radio receiver assembly Scratches or dirt is found on CD surface or Scratched Reversed Disc Inspect CD CD is set upside down 2003 TOYOTA TACOMA RM1002U Author Date 2341 BODY ELECTRICAL AUDIO SYSTE

TROUBLESHOOTING

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