Audio System: Troubleshooting
- DIAGNOSIS FUNCTION (Main AVC-LAN)
- Diagnosis start-up
For shifting to diagnosis mode, turn the ignition switch ON and push the "DISC" switch 3 times while pressing "ch1" and "ch6" switches.
HINT:
To exit the diagnosis mode, push the "DISC" switch for 1.7 sec. or turn the ignition switch to ACC or OFF.
- Element check mode
After the diagnosis start-up, the system enters the element check mode. Check that the all elements light up.
HINT:
By pressing the "TUNE UP" switch, the system enters the "Service Check Mode".
- Switch check mode
- Element check mode is started at the same time with the switch check mode.
- Check that there is a beep sound when any switch is pressed. HINT:
By pressing "TUNE UP" switch, the system enters the "Service Check Mode".
- Service check mode
- After the element check and switch check is completed, the system enters service check mode when "TUNE UP" switch is pressed.
- Error codes over the tuner and connected equipments are displayed on the screen of the tuner. Results for each check are displayed as follows:
- Good:
No DTC is detected for both "System Check Confirmation" and "Diagnosis Memory Response".
- 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 Response" or "Diagnosis Memory Response".
- CHEC:
Application of new version has been confirmed by the "Diagnosis On Check", and there is no DTC which indicates "Replacement" in the "System Check Result Response" or "Diagnosis Memory Response", but one or more DTC which indicates "Check" is identified.
- 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".
- nrES:
No response is identified to the "System Check Start Instruction" and "Request for System Check Result" commands.
- Good:
HINT:
- Check the present and past condition of components by performing the System Check and collecting stored DTC memories.
- Check results are displayed as one of the following six indications: "good", "ECHn", "CHEC", "nCon", "Old" or "nrES".
- Display Screen for Service Check.
Example:
Connection parts (physical address): Radio receiver (P190), RSA ECU (P1F4), DVD player (P1A0)
- "ECHn" Detail Display Mode Screen
- "CHEC" Detail Display Mode Screen
- "Old" Detail Display Mode Screen
- Diagnosis start-up
- DIAGNOSIS FUNCTION (Sub AVC-LAN)
HINT:
As starting Main AVC-LAN to operate the diagnosis mode, Sub AVC-LAN is automatically to the mode. Perform the diagnosis mode operation on the RSA panel.
- Element check mode
After the diagnosis start-up, the system enters the element check mode. Check that the all elements light up.
HINT:
By pressing the "TUNE UP" switch, the system enters the "Service Check Mode".
- Switch check mode
- Element check mode is started at the same time with the switch check mode.
- Check that there is a beep sound when any switch is pressed.
HINT:
By pressing "TUNE UP" switch, the system enters the "Service Check Mode".
- Service check mode
- After the element check and switch check is completed, the system enters service check mode when "TUNE UP" switch is pressed.
- Error codes over the tuner and connected equipments are displayed on the screen of the tuner. Results for each check are displayed as follows:
- Good:
No DTC is detected for both "System Check Confirmation" and "Diagnosis Memory Response".
- 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 Response" or "Diagnosis Memory Response".
- CHEC:
Application of new version has been confirmed by the "Diagnosis On Check", and there is no DTC which indicates "Replacement" in the "System Check Result Response" or "Diagnosis Memory Response", but one or more DTC which indicates "Check" is identified.
- 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".
- nrES:
- Good:
No response is identified to the "System Check Start Instruction" and "Request for System
Check Result" commands.
HINT:
- Check the present and past condition of components by performing the System Check and collecting stored DTC memories.
- Check results are displayed as one of the following six indications: "good", "ECHn", "CHEC", "nCon", "Old" or "nrES".
- Display Screen for Service Check.
Example:
Connection parts (physical address): Radio receiver (P190), RSA ECU (P1F4), DVD player (P1A0)
- "ECHn" Detail Display Mode Screen
- "CHEC" Detail Display Mode Screen
- "Old" Detail Display Mode Screen
- Element check mode
- DIAGNOSIS CODE LIST
W/Navigation system
Physical address: 190 Radio receiver assembly
HINT:
*1: Even if no failure is detected, it may be stored depending on the battery condition or voltage for starting an engine.
*2: It may be stored when the engine key is turned 1 min. and again after engine start.
*3: It may be stored when the engine key is turned again after engine start.
*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.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Physical address: 440 Stereo component amplifier
HINT:
*1: Even if no failure is detected, it may be stored depending on the battery condition or voltage for starting an engine.
*2: It may be stored when the engine key is turned 1 min. and again after engine start.
*3: It may be stored when the engine key is turned again after engine start.
*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.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Physical address: 1F4 RSA Panel (Main AVC-LAN)
HINT:
*1: Even if no failure is detected, it may be stored depending on the battery condition or voltage for starting an engine.
*2: It may be stored when the engine key is turned 1 min. and again after engine start.
*3: It may be stored when the engine key is turned again after engine start.
*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.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Physical address: 16A, 16C RSA Panel (Sub AVC-LAN)
HINT:
*1: Even if no failure is detected, it may be stored depending on the battery condition or voltage for starting an engine.
*2: It may be stored when the engine key is turned 1 min. and again after engine start.
*3: It may be stored when the engine key is turned again after engine start.
*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.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Physical address: 1A0 DVD Auto Player
HINT:
*1: Even if no failure is detected, this code may be stored depending on the battery condition or voltage for starting an engine.
*2: This code may be stored when the engine key is turned again 1 min. after engine start.
*3: This code may be stored when the engine key is turned again after engine start.
*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.
Physical address: 250 (DVD Auto Changer) (Sub AVC-LAN)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- PROBLEM SYMPTOMS TABLE NOTE: 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.
- Open or short circuit of the wire harness
- Connector or terminal connection fault
AUDIO SYSTEM PROBLEM SYMPTOMSComponent Problem Flowchart No. Radio Radio not operating when power switch turned to 'ON'. 1 Radio Display indicates when power switch turned to 'ON', but no sound (including 'noise') is produced. 2 Radio Noise present, but AM - FM not operating. 3 Radio Any speaker does not work. 4 Radio Any AM or FM does not work. 5 Radio Few preset turning bands. 5 Radio Reception poor. 6 Radio Sound quality poor. 7 Radio Preset memory disappears. 8 Tape Player Cassette tape cannot be inserted. 9 Tape Player Cassette tape inserted, but no power. 10 Tape Player Power coming in, but tape player not operating. 11 Tape Player Any speaker does not work. 12 Tape Player Sound quality poor. 13 Tape Player Tape jammed, malfunction with tape speed or auto-reverse. 14 Tape Player Cassette tape will not eject. 15 CD Player CD cannot be inserted. 16 CD Player CD inserted but no power 17 CD Player Power coming in, but CD player not operating. 18 CD Player Sound jumps. 19 CD Player Sound quality poor (Volume faint) 20 CD Player Any speaker does not work. 21 CD Player CD will not be ejected. 22 Power Amplifier No power coming in. 23 Power Amplifier Power coming in, but power amplifier not operating. 24 Power Amplifier Any speaker does not work. 25 Noise Noise occurs 26 Noise Noise produced by vibration or shock while driving. 27 Noise Noise produced when engine starts. 28 Steering Pad Switch A audio system cannot be operated with steering pad switch. 29 Rear Seat Audio Quality of sound from headphone connected to headphone terminal is poor or no sound can be heard. 30
The term "AM" includes LW, MW and SW, and the term "FW" includes UKW.
- Radio: RADIO NOT OPERATING WHEN POWER SWITCH TURNED TO "ON"
- Radio: DISPLAY INDICATES WHEN POWER SWITCH TURNED TO "ON", BUT NO SOUND (INCLUDING "NOISE") IS PRODUCED
- Radio: NOISE PRESENT, BUT AM-FM NOT OPERATING
- Radio: ANY SPEAKER DOES NOT WORK
- Radio: ANY AM OR FM DOES NOT WORK; FEW PRESET TUNING BANDS
- Radio: POOR RECEPTION
- Radio: SOUND QUALITY POOR
- Radio: PRESET MEMORY DISAPPEARS
- Tape Player: CASSETTE TAPE CANNOT BE INSERTED
- Tape Player: CASSETTE TAPE INSERTED, BUT NO POWER
- Tape Player: POWER COMING IN, BUT TAPE PLAYER NOT OPERATING
- Tape Player: ANY SPEAKER DOES NOT WORK
- Tape Player: SOUND QUALITY POOR (VOLUME FAINT)
- Tape Player: TAPE JAMMED MALFUNCTION WITH TAPE SPEED OR AUTO-REVERSE
- Tape Player: CASSETTE TAPE WILL NOT BE EJECTED
- CD Player: CD CANNOT BE INSERTED
- CD Player: CD INSERTED, BUT NO POWER
- CD Player: POWER COMING IN, BUT CD PLAYER NOT OPERATING
- CD Player: SOUND JUMPS
- CD Player: SOUND QUALITY POOR (VOLUME FAINT)
- CD Player: ANY SPEAKER DOES NOT WORK
- CD Player: CD WILL NOT BE EJECTED
- Power Amplifier: NO POWER COMING IN
- Power Amplifier: POWER COMING IN, BUT WOOFER (POWER) AMPLIFIER NOT OPERATING
- Power Amplifier: ANY SPEAKER DOES NOT WORK
- Noise: NOISE OCCURS
- Noise: NOISE PRODUCED BY VIBRATION OR SHOCK WHILE DRIVING
- Noise: NOISE PRODUCED WHEN ENGINE STARTS
- Steering Pad Switch: AUDIO SYSTEM CANNOT BE OPERATED WITH STEERING PAD SWITCH
- Rear Seat Audio: QUALITY OF SOUND FROM HEADPHONE TERMINAL IS POOR OR NO SOUND CAN BE HEARD