Problem Symptoms Table
WARNING: This page is about a different car, the 2008 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Audio Function
PROBLEM SYMPTOMS REFERENCE
| Symptom | Suspected Area | Reference |
|---|---|---|
| Pressing power switch does not turn on system. | Proceed to "Pressing Power Switch does not Turn on System" | PRESSING POWER SWITCH DOES NOT TURN ON SYSTEM |
| Proceed to "Radio Receiver Power Source Circuit" | RADIO RECEIVER POWER SOURCE CIRCUIT | |
| Proceed to "AVC-LAN Circuit" | AVC-LAN CIRCUIT | |
| Radio receiver assembly | RADIO RECEIVER | |
| Panel switch does not function. | Proceed to "Steering Pad Switch Circuit" | STEERING PAD SWITCH CIRCUIT |
| Proceed to "AVC-LAN Circuit" | AVC-LAN CIRCUIT | |
| Radio receiver assembly | RADIO RECEIVER | |
| No sound can be heard from speakers (Audio is mute.) (for separate type amplifier system). | Proceed to "Radio Receiver Power Source Circuit" | RADIO RECEIVER POWER SOURCE CIRCUIT |
| Proceed to "No Sound can be Heard from Speakers" | NO SOUND CAN BE HEARD FROM SPEAKERS | |
| Proceed to "Stereo Component Amplifier Power Source Circuit" | STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT | |
| Proceed to "Sound Signal Circuit between Radio Receiver and Stereo Component Amplifier" | SOUND SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND STEREO COMPONENT AMPLIFIER | |
| Proceed to "Speaker Circuit (Independent Amplifier)" | SPEAKER CIRCUIT (INDEPENDENT AMPLIFIER) | |
| Proceed to "Mute Signal Circuit between Radio Receiver and Stereo Component Amplifier" | MUTE SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND STEREO COMPONENT AMPLIFIER | |
| Stereo component amplifier assembly | STEREO COMPONENT AMPLIFIER | |
| Radio receiver assembly | RADIO RECEIVER | |
| No sound can be heard from speakers (Audio is mute.) (for built-in type amplifier system). | Proceed to "Radio Receiver Power Source Circuit" | RADIO RECEIVER POWER SOURCE CIRCUIT |
| Proceed to "No Sound can be Heard from Speakers" | NO SOUND CAN BE HEARD FROM SPEAKERS | |
| Proceed to "Speaker Circuit (Built-in Amplifier)" | SPEAKER CIRCUIT (BUILT-IN AMPLIFIER) | |
| Radio receiver assembly | RADIO RECEIVER | |
| Sound quality is bad in all modes (Volume is too low.) (for separate type amplifier system). | Proceed to "Poor Sound Quality in All Modes (Low Volume)" | POOR SOUND QUALITY IN ALL MODES (LOW VOLUME) |
| Proceed to "Speaker Circuit (Independent Amplifier)" | SPEAKER CIRCUIT (INDEPENDENT AMPLIFIER) | |
| Proceed to "Sound Signal Circuit between Radio Receiver and Stereo Component Amplifier" | SOUND SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND STEREO COMPONENT AMPLIFIER | |
| Proceed to "Mute Signal Circuit between Radio Receiver and Stereo Component Amplifier" | MUTE SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND STEREO COMPONENT AMPLIFIER | |
| Stereo component amplifier assembly | STEREO COMPONENT AMPLIFIER | |
| Radio receiver assembly | RADIO RECEIVER | |
| Sound quality is bad in all modes (Volume is too low.) (for built-in type amplifier system). | Proceed to "Poor Sound Quality in All Modes (Low Volume)" | POOR SOUND QUALITY IN ALL MODES (LOW VOLUME) |
| Proceed to "Speaker Circuit (Built-in Amplifier)" | SPEAKER CIRCUIT (BUILT-IN AMPLIFIER) | |
| Radio receiver assembly | RADIO RECEIVER | |
| ASL does not function (for separate type amplifier 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 (for built-in type amplifier system). | Proceed to "Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter" | VEHICLE SPEED SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND COMBINATION METER |
| External device sound cannot be heard or sound quality is bad (Stereo jack is used.). | Proceed to "Radio Receiver Power Source Circuit" | RADIO RECEIVER POWER SOURCE CIRCUIT |
| Proceed to "Sound Signal Circuit between Radio Receiver and Stereo Jack Adapter" | SOUND SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND STEREO JACK ADAPTER | |
| Stereo jack adapter assembly | STEREO JACK ADAPTER ASSEMBLY | |
| Radio receiver assembly | RADIO RECEIVER | |
| Abnormal noise occurs (for separate type amplifier system). | Proceed to "Noise occurs" | NOISE OCCURS |
| Stereo component amplifier assembly | STEREO COMPONENT AMPLIFIER | |
| Radio receiver assembly | RADIO RECEIVER | |
| Abnormal noise occurs (for built-in type amplifier system). | Proceed to "Noise occurs" | NOISE OCCURS |
| Radio receiver assembly | RADIO RECEIVER | |
| Radio broadcast cannot be received or poor reception. | Proceed to "Radio Broadcast cannot be Received (Poor Reception)" | RADIO BROADCAST CANNOT BE RECEIVED (BAD RECEPTION) |
| CD cannot be inserted/played or CD is ejected right after insertion. | Proceed to "Radio Receiver Power Source Circuit" | RADIO RECEIVER POWER SOURCE CIRCUIT |
| 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. | Proceed to "Radio Receiver Power Source Circuit" | RADIO RECEIVER POWER SOURCE CIRCUIT |
| 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 at night. | Proceed to "Illumination Circuit" | ILLUMINATION CIRCUIT |
| Radio receiver assembly | RADIO RECEIVER |
Steering Pad Switch Function
PROBLEM SYMPTOMS REFERENCE
| Symptom | Suspected Area | Reference |
|---|---|---|
| Audio system cannot be operated with steering pad switch. | Proceed to "Steering Pad Switch Circuit" | STEERING PAD SWITCH CIRCUIT |
| Radio receiver assembly | RADIO RECEIVER | |
| Steering pad switch cannot be illuminated at night. | Proceed to "Illumination Circuit" | ILLUMINATION CIRCUIT |
| Radio receiver assembly | RADIO RECEIVER |
"Bluetooth" Function*
PROBLEM SYMPTOMS REFERENCE
| Symptom | Suspected Area | Reference |
|---|---|---|
| Cellular phone registration failure, phone directory transfer failure. | Proceed to "Cellular Phone Registration Failure, Phone Directory Transfer Failure" | CELLULAR PHONE REGISTRATION FAILURE, PHONE DIRECTORY TRANSFER FAILURE |
| Cellular phone cannot send/receive. | Proceed to "Cellular Phone cannot Send/Receive" | CELLULAR PHONE CANNOT SEND/RECEIVE |
| Proceed to "Steering Pad Switch Circuit" | STEERING PAD SWITCH CIRCUIT | |
| Radio receiver assembly | RADIO RECEIVER | |
| The other callers voice cannot be heard, is too quiet, or distorted. | Proceed to "The Other Callers Voice cannot be Heard, is too Quiet, or Distorted" | THE OTHER CALLER'S VOICE CANNOT BE HEARD, IS TOO QUIET, OR DISTORTED |
| Proceed to "Cellular Phone Voice Circuit between Radio Receiver and Stereo Component Amplifier" | CELLULAR PHONE VOICE CIRCUIT BETWEEN RADIO RECEIVER AND STEREO COMPONENT AMPLIFIER | |
| Radio receiver assembly | RADIO RECEIVER | |
| Stereo component amplifier assembly | STEREO COMPONENT AMPLIFIER | |
| The other caller cannot hear your voice, or your voice is too quiet or distorted. | Proceed to "The Other Caller cannot Hear Your Voice, or Your Voice is too Quiet or Distorted" | THE OTHER CALLER CANNOT HEAR YOUR VOICE, OR YOUR VOICE IS TOO QUIET OR DISTORTED |
| Proceed to "Microphone Circuit between Microphone and Radio Receiver" | MICROPHONE CIRCUIT BETWEEN MICROPHONE AND RADIO RECEIVER | |
| Microphone amplifier assembly | MICROPHONE AMPLIFIER | |
| Radio receiver assembly | RADIO RECEIVER |
HINT:
*: w/ Built-in "Bluetooth" Receiver Antenna