Problem Symptoms Table
WARNING: This page is about a different car, the 2008 Lexus IS F. 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 CHART (AUDIO FUNCTION)
| Symptom | Suspected Area | See |
|---|---|---|
| Pressing power switch does not turn on system (w/o navigation system) | Proceed to "Pressing Power Switch does not Turn on System" | PRESSING POWER SWITCH DOES NOT TURN ON SYSTEM |
| Radio receiver power source circuit | RADIO RECEIVER POWER SOURCE CIRCUIT | |
| Integration control & panel assembly power source circuit | INTEGRATION CONTROL AND PANEL ASSEMBLY POWER SOURCE CIRCUIT | |
| AVC-LAN circuit | AVC-LAN CIRCUIT | |
| Radio receiver | RADIO RECEIVER | |
| Integration control & panel assembly | TERMINALS OF ECU | |
| Pressing power switch does not turn on system (w/ navigation system) | Proceed to "Pressing Power Switch does not Turn on System" | PRESSING POWER SWITCH DOES NOT TURN ON SYSTEM |
| Radio receiver power source circuit | RADIO RECEIVER POWER SOURCE CIRCUIT | |
| Multi-display power source circuit | MULTI-DISPLAY POWER SOURCE CIRCUIT | |
| AVC-LAN circuit | AVC-LAN CIRCUIT | |
| Radio receiver | RADIO RECEIVER | |
| Multi-display | REMOVAL | |
| Panel switch does not function | Steering pad switch circuit | STEERING PAD SWITCH CIRCUIT |
| AVC-LAN circuit | AVC-LAN CIRCUIT | |
| Radio receiver | RADIO RECEIVER | |
| No sound can be heard from speakers (audio is mute) (w/o navigation system) | AVC-LAN circuit | AVC-LAN CIRCUIT |
| Radio receiver power source circuit | RADIO RECEIVER POWER SOURCE CIRCUIT | |
| Integration control & panel assembly power source circuit | INTEGRATION CONTROL AND PANEL ASSEMBLY POWER SOURCE CIRCUIT | |
| Proceed to "No Sound can be Heard from Speakers" | NO SOUND CAN BE HEARD FROM SPEAKERS | |
| 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 | |
| Speaker circuit | SPEAKER CIRCUIT | |
| 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 | STEREO COMPONENT AMPLIFIER | |
| Radio receiver | RADIO RECEIVER | |
| Integration control & panel assembly | REMOVAL | |
| No sound can be heard from speakers (audio is mute) (w/ navigation system) | AVC-LAN circuit | AVC-LAN CIRCUIT |
| Radio receiver power source circuit | RADIO RECEIVER POWER SOURCE CIRCUIT | |
| Multi-display power source circuit | MULTI-DISPLAY POWER SOURCE CIRCUIT | |
| Proceed to "No Sound can be Heard from Speakers" | NO SOUND CAN BE HEARD FROM SPEAKERS | |
| 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 | |
| Speaker circuit | SPEAKER CIRCUIT | |
| 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 | STEREO COMPONENT AMPLIFIER | |
| Radio receiver | RADIO RECEIVER | |
| Multi-display | REMOVAL | |
| Only DVD sound cannot be heard or sound quality is bad (w/DVD Player) | Proceed to "DVD Sound Signal Circuit between Radio Receiver and Stereo Component Amplifier" | DVD SOUND SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND STEREO COMPONENT AMPLIFIER |
| Stereo component amplifier | STEREO COMPONENT AMPLIFIER | |
| Radio receiver | RADIO RECEIVER | |
| Sound quality is bad in all modes (volume is too low) | Proceed to "Poor Sound Quality in All Modes (Low Volume)" | POOR SOUND QUALITY IN ALL MODES (LOW VOLUME) |
| Speaker circuit | SPEAKER 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 "Mute Signal Circuit between Radio Receiver and Stereo Component Amplifier" | MUTE SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND STEREO COMPONENT AMPLIFIER | |
| Stereo component amplifier | STEREO COMPONENT AMPLIFIER | |
| Radio receiver | RADIO RECEIVER | |
| ASL does not function | Proceed to "Vehicle Speed Signal Circuit between Stereo Component Amplifier and Combination Meter" | VEHICLE SPEED SIGNAL CIRCUIT BETWEEN STEREO COMPONENT AMPLIFIER AND COMBINATION METER |
| External device sound cannot be heard or sound quality is bad (stereo jack is used) | 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 | STEREO JACK ADAPTER ASSEMBLY | |
| Radio receiver | RADIO RECEIVER | |
| Abnormal noise occurs | Proceed to "Noise Occurs" | NOISE OCCURS |
| Stereo component amplifier | STEREO COMPONENT AMPLIFIER | |
| Radio receiver | RADIO RECEIVER | |
| 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 | 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 | 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 or integration control & panel assembly cannot be illuminated at night | Illumination circuit | ILLUMINATION CIRCUIT |
Steering Pad Switch Function
PROBLEM SYMPTOMS CHART (STEERING PAD SWITCH FUNCTION)
| Symptom | Suspected Area | See |
|---|---|---|
| Audio system cannot be operated with steering pad switch | Steering pad switch circuit | STEERING PAD SWITCH CIRCUIT |
| Radio receiver | RADIO RECEIVER | |
| Steering pad switch cannot be illuminated at night | Illumination circuit | ILLUMINATION CIRCUIT |