Problem Symptoms Table
HINT:
- Before inspecting the suspected areas listed in the table below, check the fuse and relay.
- Before inspecting the suspected areas listed in the table below, 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 REFERENCE
| Symptom | Suspected area | Proceed to |
|---|---|---|
| Pressing power switch does not turn on system. | 1. 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. Replace radio receiver | REPLACE RADIO RECEIVER | |
| Panel switch does not function. | 1. Steering pad switch circuit | STEERING PAD SWITCH CIRCUIT |
| 2. AVC-LAN Circuit | AVC-LAN CIRCUIT | |
| 3. Replace radio receiver | REPLACE RADIO RECEIVER | |
| No sound can be heard from speakers (audio is mute). | 1. Radio receiver power source circuit | RADIO RECEIVER POWER SOURCE CIRCUIT |
| 2. No sound can be heard from speakers (audio is mute) | NO SOUND CAN BE HEARD FROM SPEAKERS (AUDIO IS MUTE) | |
| 3. Stereo component amplifier power source circuit | STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT | |
| 4. 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. Mute signal circuit between radio receiver and stereo component amplifier | MUTE SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND STEREO COMPONENT AMPLIFIER | |
| 7. Mute signal circuit between navigation ecu and stereo component amplifier | MUTE SIGNAL CIRCUIT BETWEEN NAVIGATION ECU AND STEREO COMPONENT AMPLIFIER | |
| 8. Replace stereo component amplifier | STEREO COMPONENT AMPLIFIER | |
| 9. Replace radio receiver | REPLACE RADIO RECEIVER | |
| Sound cannot be heard only from front speaker (driver side). (Volume is too low.) (Only with navigation system) | 1. Driver side speaker circuit | DRIVER SIDE SPEAKER CIRCUIT |
| 2. Sound signal circuit between radio receiver and stereo component amplifier | SOUND SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND STEREO COMPONENT AMPLIFIER | |
| 3. Replace stereo component amplifier | STEREO COMPONENT AMPLIFIER | |
| 4. Replace radio receiver | REPLACE RADIO RECEIVER | |
| Sound quality is bad in all modes. (Volume is too low.) | 1. Poor sound quality in all modes (low volume) | POOR SOUND QUALITY IN ALL MODES (LOW VOLUME) |
| 2. Speaker circuit | SPEAKER CIRCUIT | |
| 3. Sound signal circuit between radio receiver and stereo component amplifier | SOUND SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND STEREO COMPONENT AMPLIFIER | |
| 4. Mute signal circuit between radio receiver and stereo component amplifier | MUTE SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND STEREO COMPONENT AMPLIFIER | |
| 5. Mute signal circuit between navigation ecu and stereo component amplifier | MUTE SIGNAL CIRCUIT BETWEEN NAVIGATION ECU AND STEREO COMPONENT AMPLIFIER | |
| 6. Replace stereo component amplifier | STEREO COMPONENT AMPLIFIER | |
| 7. Replace radio receiver | REPLACE RADIO RECEIVER | |
| ASL does not function. | 1. Vehicle speed signal circuit between stereo component amplifier and combination meter | VEHICLE SPEED SIGNAL CIRCUIT BETWEEN STEREO COMPONENT AMPLIFIER AND COMBINATION METER |
| Sound cannot be heard or sound quality is bad. (RSE sound) | 1. Radio receiver power source circuit | RADIO RECEIVER POWER SOURCE CIRCUIT |
| 2. Multi-display controller power source circuit | MULTI-DISPLAY CONTROLLER POWER SOURCE CIRCUIT | |
| 3. Sound signal circuit between radio receiver and multi-display controller | SOUND SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND MULTI-DISPLAY CONTROLLER | |
| 4. Replace radio receiver | REPLACE RADIO RECEIVER | |
| 5. Replace multi-display controller | TELEVISION DISPLAY | |
| Abnormal noise occurs. | 1. Noise occurs | NOISE OCCURS |
| 2. Replace stereo component amplifier | STEREO COMPONENT AMPLIFIER | |
| Replace radio receiver | REPLACE RADIO RECEIVER | |
| Radio broadcast cannot be received (poor reception). | 1. Radio broadcast cannot be received (poor reception) | RADIO BROADCAST CANNOT BE RECEIVED (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. 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. CD Cannot be ejected | CD CANNOT BE EJECTED | |
| Sound quality is bad only when playing CD. (Volume is too low.) | 1. 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. | 1. CD sound skips | CD SOUND SKIPS |
| Cassette tape cannot be inserted or played. | 1. Radio receiver power source circuit | RADIO RECEIVER POWER SOURCE CIRCUIT |
| 2. Cassette tape cannot be inserted or played | CASSETTE TAPE CANNOT BE INSERTED OR PLAYED | |
| Cassette tape cannot be ejected. | 1. Radio receiver power source circuit | RADIO RECEIVER POWER SOURCE CIRCUIT |
| 2. Cassette tape cannot be ejected | CASSETTE TAPE CANNOT BE EJECTED | |
| Sound quality is bad only when playing tape. | 1. Sound quality is bad only when playing tape | SOUND QUALITY IS BAD ONLY WHEN PLAYING TAPE |
| Tape is tangled due to incorrect tape speed or auto-reverse malfunction. | 1. Tape is tangled due to incorrect tape speed or auto-reverse malfunction | TAPE IS TANGLED DUE TO INCORRECT TAPE SPEED OR AUTO-REVERSE MALFUNCTION |
| Radio receiver cannot be dimmed in night time. | 1. Dimmer signal circuit | DIMMER SIGNAL CIRCUIT |
| 2. Replace radio receiver | REPLACE RADIO RECEIVER | |
| Radio receiver cannot be illuminated in night time. | 1. Illumination circuit | ILLUMINATION CIRCUIT |
| 2. Replace radio receiver | REPLACE RADIO RECEIVER |
Steering Pad Switch Function:
STEERING PAD SWITCH FUNCTION PROBLEM SYMPTOMS REFERENCE
| Symptom | Suspected area | Proceed to |
|---|---|---|
| Audio system cannot be operated with steering pad switch. | 1. Steering pad switch circuit | STEERING PAD SWITCH CIRCUIT |
| 2. Replace radio receiver | REPLACE RADIO RECEIVER |