LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2007 >> RX 400h AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 311 (Audio System & Visual System) >> Audio And Visual System >> Problem Symptoms Table
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Problem Symptoms Table

WARNING: This page is about a different car, the 2008 Toyota FJ Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Use the table below to determine the cause of the problem symptom. The potential causes of the symptom 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.

Audio Function 

PROBLEM SYMPTOMS

Symptom Suspected Area See
Noise occurs 1. Proceed to Noise Occurs NOISE OCCURS 
2. Radio Receiver -
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. Proceed to Radio Receiver Power Source Circuit RADIO RECEIVER POWER SOURCE CIRCUIT 
3. Radio Receiver -
No sound can be heard from speakers (audio is mute) 1. Proceed to No Sound can be Heard from Speakers (Audio is Mute) NO SOUND CAN BE HEARD FROM SPEAKERS 
2. Proceed to Speaker Circuit SPEAKER CIRCUIT 
3. Proceed to Radio Receiver Power Source Circuit RADIO RECEIVER POWER SOURCE CIRCUIT 
4. Proceed to Woofer Speaker Power Source Circuit (w/ woofer speaker) WOOFER SPEAKER SWITCH CIRCUIT 
5. Radio Receiver -
Sound quality is bad only when CD is played (volume is too low) 1. 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) 
2. Proceed to Speaker Circuit SPEAKER CIRCUIT 
3, Proceed to Woofer Speaker Power Source Circuit (w/ woofer speaker) WOOFER SPEAKER POWER SOURCE CIRCUIT 
4. Radio Receiver -
CD cannot be ejected 1. Proceed to CD cannot be Ejected CD CANNOT BE EJECTED 
2. Proceed to Radio Receiver Power Source Circuit RADIO RECEIVER POWER SOURCE CIRCUIT 
3. Radio Receiver -
CD cannot be inserted / played or CD is ejected right after insertion 1. Proceed to CD cannot be Inserted / Played or CD is Ejected Right After Insertion CD CANNOT BE INSERTED OR IS EJECTED RIGHT AFTER INSERTION 
2. Proceed to Radio Receiver Power Source Circuit RADIO RECEIVER POWER SOURCE CIRCUIT 
3. Radio Receiver -
CD sound skips 1. Proceed to CD Sound Skips CD SOUND SKIPS 
2. Radio Receiver -
Radio broadcast cannot be received (bad reception) 1. Proceed to Radio Broadcast cannot be Received (Bad Reception) RADIO BROADCAST CANNOT BE RECEIVED (BAD RECEPTION) 
Poor sound quality in all modes (low volume) 1. Proceed to Poor Sound Quality in All Modes (Low Volume) POOR SOUND QUALITY IN ALL MODES (LOW VOLUME) 
2. Proceed to Speaker Circuit SPEAKER CIRCUIT 
3. Radio Receiver -
Radio receiver cannot be illuminated at night 1. Proceed to Illumination Circuit ILLUMINATION CIRCUIT 
2. Radio Receiver -
External device sound cannot be heard or sound quality is bad. (Stereo jack is used.) 1. Proceed to Sound Signal Circuit between Radio Receiver and Stereo Jack Adapter SOUND SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND STEREO JACK ADAPTER 
2. Stereo Jack Adapter -
3. Noise Filter -
4. Radio Receiver -
Woofer system cannot be operated with woofer speaker switch (w/ woofer speaker) 1. Proceed to Woofer Speaker Switch Circuit WOOFER SPEAKER SWITCH CIRCUIT 
2. Radio Receiver -
3. Proceed to Woofer Speaker Power Source Circuit WOOFER SPEAKER POWER SOURCE CIRCUIT 

Steering Pad Switch Function 

PROBLEM SYMPTOMS

Symptom Suspected Area See
Audio system cannot be operated with steering pad switch 1. Proceed to Steering Pad Switch Circuit STEERING PAD SWITCH CIRCUIT 
2. Radio Receiver -
Steering pad switch cannot be illuminated at night 1. Proceed to Illumination Circuit ILLUMINATION CIRCUIT 
2. Radio Receiver -