Problem Symptoms Table

WARNING: This page is about a different car, the 2002 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.

PROBLEM SYMPTOMS

Symptom	Suspect Area
Although "POWER" Is Pressed, No Sound Is Heard. (Nothing Is Shown On The Radio Receiver Display.)	1. RADIO NO. 1 FUSE
	2. RADIO NO. 2 FUSE
	3. RADIO RECEIVER ASSY POWER SOURCE CIRCUIT
	4. RADIO RECEIVER ASSY
Although "POWER" Is Pressed, No Sound Is Heard. (The Radio Receiver's Display Is Normal, But Switch Operation Does Not Function.)	1. OPTIONAL COMPONENT
	2. RADIO RECEIVER ASSY (RESISTANCE)
	3. WIRE HARNESS (RADIO RECEIVER ASSY - STEREO COMPONENT AMPLIFIER)
	4. STEREO COMPONENT AMPLIFIER
	5. RADIO RECEIVER ASSY
	6. AVC-LAN CIRCUIT
	7. WIRE HARNESS (RADIO RECEIVER ASSY - GATEWAY ECU)
	8. STEERING PAD SWITCH
	9. GATEWAY ECU
Although "POWER" Is Pressed, No Sound Is Heard. (The Radio Receiver's Display And Switch Operation Is Normal.)	1. AVC-LAN CIRCUIT (STEREO COMPONENT AMPLIFIER)
	2. STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT
	3. STEREO COMPONENT AMPLIFIER (RELATED TO MUTE SIGNAL CIRCUIT)
	4. RADIO RECEIVER ASSY (RELATED TO SOUND SIGNAL CIRCUIT)
	5. WIRE HARNESS (STEREO COMPONENT AMPLIFIER - SPEAKER)
	6. STEREO COMPONENT AMPLIFIER
Volume Cannot Be Adjusted By Using The Steering Pad Switch Modulator. (Sound Is Heard. Volume Can Be Adjusted By The Radio Receiver.)	1. AVC-LAN CIRCUIT (GATEWAY ECU)
	2. WIRE HARNESS (RADIO RECEIVER ASSY - GATEWAY ECU)
	3. STEERING PAD SWITCH
	4. GATEWAY ECU
Bad Sound Quality In Any Mode. (Radio Receiver's Display Is Normal.)	1. SPEAKER
	2. WIRE HARNESS (STEREO COMPONENT AMPLIFIER- SPEAKER)
	3. STEREO COMPONENT AMPLIFIER
Sound Of Cassette Tape & CD Only Is Not Heard From Speakers.	1. RADIO RECEIVER ASSY (RELATED TO SOUND SIGNAL CIRCUIT)
	2. STEREO COMPONENT AMPLIFIER (RELATED TO SOUND SIGNAL CIRCUIT)
	3. STEREO COMPONENT AMPLIFIER
Radio Broadcast Cannot Be Received. (Bad Reception. Noise Occurs.)	1. FOREIGN OBJECT
	2. CASSETTE TAPE
	3. RADIO RECEIVER ASSY POWER SOURCE CIRCUIT
	4. RADIO RECEIVER ASSY
Cassette Tape Cannot Be Inserted/Is Ejected Right After Insertion/ Cannot Be Played.	1. CASSETTE TAPE
	2. RADIO RECEIVER ASSY POWER SOURCE CIRCUIT
	3. RADIO RECEIVER ASSY
Cassette Tape Cannot Be Ejected.	1. CASSETTE TAPE
Cassette Tape Cannot Be Ejected.	2. RADIO RECEIVER ASSY
Tape Is Tangled Due To Incorrect Tape Speed Or Auto-Reverse Malfunction.	1. CASSETTE TAPE
	2. RADIO RECEIVER ASSY
Sound Quality Is Bad Only When Playing Tape.	1. CASSETTE TAPE
Sound Quality Is Bad Only When Playing Tape.	2. RADIO RECEIVER ASSY
CD Cannot Be Inserted/Is Ejected Right After Insertion/Cannot Be Played.	1. CD
	2. CABIN CONDITION (TEMPERATURE)
	3. RADIO RECEIVER ASSY
CD Cannot Be Ejected.	1. CD
CD Cannot Be Ejected.	2. RADIO RECEIVER ASSY
CD Sound Skips.	1. CD
CD Sound Skips.	2. RADIO RECEIVER ASSY
Sound Quality Is Bad Only When CD Is Played. (Volume Is Too Low.)	1. CD
	2. RADIO RECEIVER ASSY
With The Headlight Dimmer Switch ON, The Radio Receiver Is Not Illuminated.	1. RADIO RECEIVER ASSY ILLUMINATION CIRCUIT
With The Headlight Dimmer Switch ON, The Steering Pad Switch Is Not Illuminated.	1. ILLUMINATION CIRCUIT
Audio Door Function Does Not Operate.	1. AUDIO DOOR CONTROL SWITCH CIRCUIT
Audio Door Function Does Not Operate.	2. RADIO RECEIVER ASSY
Automatic Sound Levelizer Function Is Abnormal Operation.	1. AVC-LAN CIRCUIT (GATEWAY ECU)
	2. WIRE HARNESS (RADIO RECEIVER ASSY - GATEWAY ECU)
	3. STEREO COMPONENT AMPLIFIER (RELATED TO SPD SIGNAL CIRCUIT)
	4. Radio Receiver Assy
	5. COMBINATION METER ASSY
Noise Occurs	1. CONDITION
	2. OPTICAL COMPONENT
	3. ANTENNA PLUG
	4. ANTENNA MOTOR
	5. SPEAKER