Problem Symptoms Table
WARNING: This page is about a different car, the 2012 Lexus LS 460. 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
| Symptom | Suspected Area | Reference |
|---|---|---|
| Pressing power switch does not turn on system | Proceed to "Pressing Power Switch does not Turn on System" | Refer to Pressing Power Switch does not Turn on System |
| Proceed to "Radio Receiver Power Source Circuit" | Refer to Radio Receiver Power Source Circuit | |
| Replace radio receiver assembly | Refer to REMOVAL | |
| Panel switch does not function | Proceed to "Steering Pad Switch Circuit" (w/ Navigation System [for DVD]) | Refer to Steering Pad Switch Circuit |
| Proceed to "Steering Pad Switch Circuit" (w/ Navigation System [for HDD]) | Refer to Steering Pad Switch Circuit | |
| Proceed to "Steering Pad Switch Circuit" (w/o Navigation System) | Refer to Steering Pad Switch Circuit | |
| Replace radio receiver assembly | Refer to REMOVAL | |
| No sound can be heard from speakers (Audio is mute) | Proceed to "No Sound can be Heard from Speakers" | Refer to No Sound can be Heard from Speakers |
| Proceed to "Stereo Component Amplifier Power Source Circuit" | Refer to Stereo Component Amplifier Power Source Circuit | |
| Proceed to "Speaker Circuit" | Refer to Speaker Circuit | |
| Replace stereo component amplifier assembly | Refer to REMOVAL | |
| Replace radio receiver assembly | Refer to REMOVAL | |
| Sound quality is bad in all modes (Volume is too low) | Proceed to "Poor Sound Quality in All Modes (Low Volume)" | Refer to Poor Sound Quality in All Modes (Low Volume) |
| Proceed to "Speaker Circuit" | Refer to Speaker Circuit | |
| Replace stereo component amplifier assembly | Refer to REMOVAL | |
| Replace radio receiver assembly | Refer to REMOVAL | |
| ASL does not function | Proceed to "B15C3" | Refer to DTC B15A3: Stereo Component Amplifier Malfunction |
| External device sound cannot be heard or sound quality is bad (Stereo jack is used) | Proceed to "Radio Receiver Power Source Circuit | Refer to Radio Receiver Power Source Circuit |
| Proceed to "Sound Signal Circuit between Radio Receiver and Stereo Jack Adapter" | Refer to Sound Signal Circuit between Radio Receiver and Stereo Jack Adapter | |
| Replace No. 1 stereo jack adapter assembly | Refer to REMOVAL | |
| Replace radio receiver assembly | Refer to REMOVAL | |
| Abnormal noise occurs | Proceed to "Noise Occurs" | Refer to Noise Occurs |
| Noise filter | - | |
| Replace stereo component amplifier assembly | Refer to REMOVAL | |
| Replace radio receiver assembly | Refer to REMOVAL | |
| Radio broadcast cannot be received or poor reception | Proceed to "Radio Broadcast cannot be Received or Poor Reception" | Refer to Radio Broadcast cannot be Received or Poor Reception |
| Disc cannot be inserted/played or CD is ejected right after insertion | Proceed to "Radio Receiver Power Source Circuit" | Refer to Radio Receiver Power Source Circuit |
| Proceed to "Disc cannot be Inserted or is Ejected Right After Insertion" | Refer to Disc cannot be Inserted or is Ejected Right After Insertion | |
| Disc cannot be ejected | Proceed to "Radio Receiver Power Source Circuit | Refer to Radio Receiver Power Source Circuit |
| Proceed to "Disc cannot be Ejected" | Refer to Disc cannot be Ejected | |
| Sound quality is bad only when disc is played (Volume is too low) | Proceed to "Sound Quality is Bad Only when Disc is Played (Volume is Too Low)" | Refer to Sound Quality is Bad Only when Disc is Played (Volume is Too Low) |
| CD or DVD sound skips | Proceed to "CD/DVD Sound Skips" | Refer to CD/DVD Sound Skips |
| Radio receiver does not illuminate at night | Proceed to "Illumination Circuit" | Refer to Illumination Circuit |
| Replace radio receiver assembly | Refer to REMOVAL |
STEERING PAD SWITCH FUNCTION
| Symptom | Suspected Area | Reference |
|---|---|---|
| Audio system cannot be operated with steering pad switch | Proceed to "Steering Pad Switch Circuit" (for DVD) | Refer to Steering Pad Switch Circuit |
| Proceed to "Steering Pad Switch Circuit" (for HDD) | Refer to Steering Pad Switch Circuit | |
| Proceed to "Steering Pad Switch Circuit" (w/o Navigation System) | Refer to Steering Pad Switch Circuit | |
| Replace radio receiver assembly | Refer to REMOVAL |
"BLUETOOTH" AUDIO FUNCTION
| Symptom | Suspected Area | Reference |
|---|---|---|
| Portable player cannot be registered | Proceed to "Portable Player cannot be Registered" | Refer to Portable Player cannot be Registered |
| Replace radio receiver assembly | Refer to REMOVAL | |
| Portable player cannot be connected manually/automatically | Proceed to "Portable Player cannot be Registered" | Refer to Portable Player cannot be Registered |
| Proceed to "Portable Player cannot be Connected Manually/Automatically" | Refer to Portable Player cannot be Connected Manually/Automatically | |
| Replace radio receiver assembly | Refer to REMOVAL | |
| Cellular phone with portable audio function cannot be recognized as "Bluetooth" audio device even when connected using "Bluetooth" | Proceed to "Portable Player cannot be Registered" | Refer to Portable Player cannot be Registered |
| Proceed to "Portable Player cannot be Connected Manually/Automatically" | Refer to Portable Player cannot be Connected Manually/Automatically | |
| Replace radio receiver assembly | Refer to REMOVAL | |
| Sound of portable player cannot be heard from speakers, or sound is low | Proceed to "Sound of Portable Player cannot be Heard from Speakers or Sound is Low" | Refer to Sound of Portable Player cannot be Heard from Speakers or Sound is Low |
| Replace radio receiver assembly | Refer to REMOVAL | |
| Portable player does not play even after "Bluetooth" audio mode is selected | Proceed to "Does not Play even after Bluetooth Audio Mode is Selected" | Refer to Does not Play even after Bluetooth Audio Mode is Selected |
| Replace radio receiver assembly | Refer to REMOVAL | |
| Portable player does not play | Proceed to "Does not Play even after Bluetooth Audio Mode is Selected" | Refer to Does not Play even after Bluetooth Audio Mode is Selected |
| Replace radio receiver assembly | Refer to REMOVAL | |
| Track information such as track number, track name and elapsed play time is not displayed | Proceed to "Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device" | Refer to Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device |
| Replace radio receiver assembly | Refer to REMOVAL | |
| Operation switches for portable player such as play, pause, repeat, random and scan are not displayed | Proceed to "Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device" | Refer to Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device |
| Replace radio receiver assembly | Refer to REMOVAL | |
| Battery condition of portable player is not displayed | Proceed to "Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device" | Refer to Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device |
| Replace radio receiver assembly | Refer to REMOVAL | |
| "Bluetooth" signal condition is not displayed | Proceed to "Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device" | Refer to Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device |
| Replace radio receiver assembly | Refer to REMOVAL | |
| Portable player cannot pause, select file, fast forward, fast rewind, random play or scan | Proceed to "Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device" | Refer to Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device |
| Replace radio receiver assembly | Refer to REMOVAL | |
| Noise occurs or sound skips when portable player play | Proceed to "Noise Occurs or Sound Skips when Portable Player Plays" | Refer to Noise Occurs or Sound Skips when Portable Player Plays |
| Noise filter | - | |
| Replace radio receiver assembly | Refer to REMOVAL | |
| Registered device cannot be deleted | Proceed to "Registered Device cannot be Deleted" | Refer to Registered Device cannot be Deleted |
| Replace radio receiver assembly | Refer to REMOVAL |
SATELLITE RADIO SYSTEM FUNCTION
| Symptom | Suspected Area | Reference |
|---|---|---|
| Satellite radio broadcast cannot be received or reception is bad | Proceed to "Satellite Radio Broadcast cannot be Received" | Refer to Satellite Radio Broadcast cannot be Received |
| Replace radio receiver assembly | Refer to REMOVAL | |
| Pay-type satellite radio broadcast cannot be received. | Proceed to "Satellite Radio Broadcast cannot be Received" | Refer to Satellite Radio Broadcast cannot be Received |
| Replace radio receiver assembly | Refer to REMOVAL | |
| Satellite radio broadcast cannot be selected or after selecting broadcast, broadcast cannot be added into memory | Proceed to "Satellite Radio Broadcast cannot be Received" | Refer to Satellite Radio Broadcast cannot be Received |
| Proceed to "Satellite Radio Broadcast cannot be Selected or After Selecting Broadcast, Broadcast cannot be added into memory" | Refer to Satellite Radio Broadcast cannot be Selected or After Selecting Broadcast, Broadcast cannot be Added into Memory | |
| Replace radio receiver assembly | Refer to REMOVAL |
USB AUDIO SYSTEM FUNCTION
| Symptom | Suspected Area | Reference |
|---|---|---|
| USB audio sound cannot be heard or sound quality is bad (Stereo jack is used) | Proceed to "Multimedia Interface ECU Power Source Circuit" | Refer to Multimedia Interface ECU Power Source Circuit |
| Proceed to "Sound Signal Circuit between Navigation ECU and Multimedia Interface ECU" | Refer to Sound Signal Circuit between Navigation ECU and Multimedia Interface ECU | |
| Proceed to "Sound Signal Circuit between Multimedia Interface ECU and Stereo Jack Adapter" | Refer to Sound Signal Circuit between Multimedia Interface ECU and Stereo Jack Adapter | |
| Replace No. 1 stereo jack adapter assembly | Refer to REMOVAL | |
| Replace multimedia interface ECU | Refer to REMOVAL | |
| Replace display and navigation module display (w/ Navigation system for DVD) | Refer to REMOVAL | |
| Replace display and navigation module display (w/ Navigation system for HDD) | Refer to REMOVAL | |
| Replace display and navigation module display (w/o Navigation system) | Refer to REMOVAL | |
| USB device or "iPod" is not recognized | Proceed to "USB Audio System Recognition/Play Error" | Refer to USB Audio System Recognition/Play Error |
| Proceed to "Sound Signal Circuit between Multimedia Interface ECU and Stereo Jack Adapter" | Refer to Sound Signal Circuit between Multimedia Interface ECU and Stereo Jack Adapter | |
| Replace No. 1 stereo jack adapter assembly | Refer to REMOVAL | |
| Replace multimedia interface ECU | Refer to REMOVAL | |
| Track information such as track, artist and album names are not displayed | Proceed to "USB Audio System Recognition/Play Error" | Refer to USB Audio System Recognition/Play Error |
| Proceed to "Sound Signal Circuit between Multimedia Interface ECU and Stereo Jack Adapter" | Refer to Sound Signal Circuit between Multimedia Interface ECU and Stereo Jack Adapter | |
| Replace No. 1 stereo jack adapter assembly | Refer to REMOVAL | |
| Replace multimedia interface ECU | Refer to REMOVAL | |
| USB device or "iPod" is recognized but cannot play or play in a sorted order | Proceed to "USB Audio System Recognition/Play Error" | Refer to USB Audio System Recognition/Play Error |
| Proceed to "Sound Signal Circuit between Multimedia Interface ECU and Stereo Jack Adapter" | Refer to Sound Signal Circuit between Multimedia Interface ECU and Stereo Jack Adapter | |
| Replace No. 1 stereo jack adapter assembly | Refer to REMOVAL | |
| Replace multimedia interface ECU | Refer to REMOVAL |