Problem Symptoms Table
WARNING: This page is about a different car, the 2006 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
- Before inspecting the suspected areas listed in AUDIO FUNCTION PROBLEM SYMPTOMS TABLE , check the fuse and relay.
- Before inspecting the suspected areas listed in AUDIO FUNCTION PROBLEM SYMPTOMS TABLE , check the DTCs.
- Methods used to verify the cause of the problem are listed in order of probability in the suspected area column.
Audio Function
AUDIO FUNCTION PROBLEM SYMPTOMS TABLE
| Symptom | Suspected area | Reference | ||
|---|---|---|---|---|
| Pressing power switch does not turn on system. | 1. Proceed to "Pressing power switch does not turn on system" | "PRESSING POWER SWITCH DOES NOT TURN ON SYSTEM" | ||
| 2. Radio receiver power source circuit | RADIO RECEIVER POWER SOURCE CIRCUIT | |||
| 3. AVC-LAN circuit | AVC-LAN circuit | |||
| 4. Radio receiver | RADIO RECEIVER ASSY | |||
| Panel switch does not function. | 1. Steering pad switch circuit | STEERING PAD SWITCH CIRCUIT | ||
| 2. AVC-LAN circuit | AVC-LAN circuit | |||
| 3. Radio receiver | RADIO RECEIVER ASSY | |||
| No sound can be heard from speakers. (Audio is mute.) (10 speaker system) | 1. Radio receiver power source circuit | RADIO RECEIVER POWER SOURCE CIRCUIT | ||
| 2. Proceed to "No sound can be heard from speakers" | "NO SOUND CAN BE HEARD FROM SPEAKERS" | |||
| 3. Stereo component amplifier power source circuit | STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT | |||
| 4. Proceed to "Sound signal circuit between radio receiver and stereo component amplifier" | "SOUND SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND STEREO COMPONENT AMPLIFIER" | |||
| 5. Speaker circuit | SPEAKER CIRCUIT | |||
| 6. Proceed to "Mute signal circuit between radio receiver and stereo component amplifier" | "MUTE SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND STEREO COMPONENT AMPLIFIER" | |||
| 7. Proceed to "Mute signal circuit between radio receiver and television display assembly" ((1)) | MUTE SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND TELEVISION DISPLAY ASSEMBLY | |||
| 8. Woofer box speaker assembly (Built-in stereo component amplifier) | W/BOX SPEAKER ASSY NO.1 | |||
| 9. Radio receiver | RADIO RECEIVER ASSY | |||
| No sound can be heard from speakers. (Audio is mute.) (6 speaker system) | 1. Radio receiver power source circuit | RADIO RECEIVER POWER SOURCE CIRCUIT | ||
| 2. Proceed to "No sound can be heard from speakers" | "NO SOUND CAN BE HEARD FROM SPEAKERS" | |||
| 3. Speaker circuit | SPEAKER CIRCUIT | |||
| 4. Proceed to "Mute signal circuit between radio receiver and television display assembly" ((1)) | MUTE SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND TELEVISION DISPLAY ASSEMBLY | |||
| 5. Radio Receiver | RADIO RECEIVER ASSY | |||
| Sound quality is bad in all modes. (Volume is too low.) (10 speaker system) | 1. Proceed to "Poor sound quality in all modes (low volume)" | "POOR SOUND QUALITY IN ALL MODES (LOW VOLUME)" | ||
| 2. Speaker circuit | SPEAKER CIRCUIT | |||
| 3. Proceed to "Sound signal circuit between radio receiver and stereo component amplifier" | "SOUND SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND STEREO COMPONENT AMPLIFIER" | |||
| 4. Proceed to "Mute signal circuit between radio receiver and stereo component amplifier" | "MUTE SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND STEREO COMPONENT AMPLIFIER" | |||
| 5. Proceed to "Mute signal circuit between radio receiver and television display assembly" ((1)) | MUTE SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND TELEVISION DISPLAY ASSEMBLY | |||
| 6. Woofer box speaker assembly (Built-in stereo component amplifier) | W/BOX SPEAKER ASSY NO.1 | |||
| 7. Radio receiver | RADIO RECEIVER ASSY | |||
| Sound quality is bad in all modes. (Volume is too low.) (6 speaker system) | 1. Proceed to "Poor sound quality in all modes (low volume)" | POOR SOUND QUALITY IN ALL MODES (LOW VOLUME) | ||
| 2. Speaker circuit | SPEAKER CIRCUIT | |||
| 3. Proceed to "Mute signal circuit between radio receiver and television display assembly" ((1)) | MUTE SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND TELEVISION DISPLAY ASSEMBLY | |||
| 4. Radio receiver | RADIO RECEIVER ASSY | |||
| ASL does not function. (10 speaker system) | Proceed to "Vehicle speed signal circuit between stereo component amplifier and combination meter" | VEHICLE SPEED SIGNAL CIRCUIT BETWEEN STEREO COMPONENT AMPLIFIER AND COMBINATION METER | ||
| ASL does not function. (6 speaker system) | Proceed to "Vehicle speed signal circuit between radio receiver and combination meter" | VEHICLE SPEED SIGNAL CIRCUIT BETWEEN STEREO COMPONENT AMPLIFIER AND COMBINATION METER | ||
| RSE sound cannot be heard or sound quality is bad. | 1. Radio receiver power source circuit | RADIO RECEIVER POWER SOURCE CIRCUIT | ||
| 2. Television display assembly power source circuit | TELEVISION DISPLAY ASSEMBLY POWER SOURCE CIRCUIT | |||
| 3. Proceed to "Sound signal circuit between radio receiver and television display assembly" | SOUND SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND TELEVISION DISPLAY ASSEMBLY | |||
| 4. Proceed to "Mute signal circuit between radio receiver and television display assembly" | MUTE SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND TELEVISION DISPLAY ASSEMBLY | |||
| 5. Radio receiver | RADIO RECEIVER ASSY | |||
| 6. Television display assembly | TELEVISION DISPLAY ASSY | |||
| External device sound cannot be heard or sound quality is bad. (Stereo jack is used.) | 1. Radio receiver power source circuit | RADIO RECEIVER POWER SOURCE CIRCUIT | ||
| 2. Proceed to "Sound signal circuit between radio receiver and stereo jack adapter" | SOUND SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND STEREO JACK ADAPTER | |||
| 3. Stereo jack adapter | AUDIO TERMINAL | |||
| 4. Radio receiver | RADIO RECEIVER ASSY | |||
| Abnormal noise occurs. (10 speaker system) | 1. Proceed to "Noise occurs" | NOISE OCCURS | ||
| 2. Woofer box speaker assembly (Built-in stereo component amplifier) | W/BOX SPEAKER ASSY NO. 1 | |||
| 3. Radio receiver | RADIO RECEIVER ASSY | |||
| Abnormal noise occurs. (6 speaker system) | 1. Proceed to "Noise occurs" | NOISE OCCURS | ||
| 2. Radio receiver | RADIO RECEIVER ASSY | |||
| Radio broadcast cannot be received or poor reception. | Proceed to "Radio broadcast cannot be received or poor reception" | RADIO BROADCAST CANNOT BE RECEIVED OR POOR RECEPTION | ||
| CD cannot be inserted/played or CD is ejected right after insertion. | 1. Radio receiver power source circuit | RADIO RECEIVER POWER SOURCE CIRCUIT | ||
| 2. Proceed to "CD cannot be inserted/played or cd is ejected right after insertion" | CD CANNOT BE INSERTED/PLAYED OR CD IS EJECTED RIGHT AFTER INSERTION | |||
| CD cannot be ejected. | 1. Radio receiver power source circuit | RADIO RECEIVER POWER SOURCE CIRCUIT | ||
| 2. Proceed to "CD cannot be ejected" | CD CANNOT BE EJECTED | |||
| Sound quality is bad only when CD is played. (Volume is too low.) | Proceed to "Sound quality is bad only when cd is played (volume is too low)" | SOUND QUALITY IS BAD ONLY WHEN CD IS PLAYED (VOLUME IS TOO LOW) | ||
| CD sound skips. | Proceed to "CD sound skips" | CD SOUND SKIPS | ||
| Radio receiver cannot be illuminated in night time mode. | 1. Illumination circuit | ILLUMINATION CIRCUIT | ||
| 2. Radio receiver | RADIO RECEIVER ASSY | |||
|
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Steering Pad Switch Function
STEERING PAD SWITCH FUNCTION PROBLEM SYMPTOMS
| Symptom | Suspected area | Reference |
|---|---|---|
| Audio system cannot be operated with steering pad switch. | 1. Steering pad switch circuit | STEERING PAD SWITCH CIRCUIT |
| 2. Radio receiver | RADIO RECEIVER ASSY | |
| Steering pad switch cannot be illuminated in night time mode. | 1. Illumination circuit | ILLUMINATION CIRCUIT |
| 2. Radio receiver | RADIO RECEIVER ASSY |