Audio System

SYMPTOM CHART

Symptom	Possible cause	Procedural Reference
Inoperative	AV control unit power and ground circuit	POWER SUPPLY AND GROUND CIRCUIT
Inoperative	AV control unit	DIAGNOSIS SYSTEM (AV CONTROL UNIT)
Steering switch does not operate	Steering switch	A/C AND AV SWITCH ASSEMBLY
Steering switch does not operate	AV control unit	DIAGNOSIS SYSTEM (AV CONTROL UNIT)
All speakers do not sound	AV control unit power and ground circuit	POWER SUPPLY AND GROUND CIRCUIT
	BOSE speaker amp. ON signal	AMP ON SIGNAL CIRCUIT
	BOSE speaker amp. power and ground circuit	A/C AND AV SWITCH ASSEMBLY: DIAGNOSIS PROCEDURE
	BOSE speaker amp.	BOSE SPEAKER AMP
	AV control unit	AV CONTROL UNIT
One or several speakers do not sound	Front door speaker	FRONT DOOR SPEAKER
	Front tweeter	FRONT TWEETER
	Center speaker	CENTER SPEAKER
	Rear tweeter	REAR DOOR TWEETER
	Rear door speaker	REAR DOOR SPEAKER
	Back door speaker	BACK DOOR SPEAKER
	Subwoofer	SUBWOOFER