Audio System

Any diagnosis of the Audio system should begin with the use of scan tool. For information on the use of the scan tool, refer to the appropriate Diagnostic information.

For complete circuit diagrams, refer to appropriate SYSTEM WIRING DIAGRAMS article

WARNING:

Disable the airbag system before attempting any steering wheel, steering column, seat belt tensioner, side airbag or instrument panel component diagnosis or service. Disconnect and isolate the negative battery (ground) cable. Wait two minutes for the airbag system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the airbag system. Failure to follow these instructions may result in accidental airbag deployment and possible serious or fatal injury. Refer to WARNING .

AUDIO SYSTEM DIAGNOSIS TABLE

CONDITION	POSSIBLE CAUSES	CORRECTION
NO AUDIO	1. Fuse faulty.	1. Check radio fuse and Ignition-Off Draw (IOD) fuse in Totally Integrated Power Module (TIPM). Replace fuses, if required.
	2. Radio connector faulty.	2. Check for loose or corroded radio connector. Repair, if required.
	3. Wiring faulty.	3. Check for shorted or open wires. Repair wiring, if required.
	4. Radio ground faulty.	4. Check for continuity between radio chassis and a known good ground. There should be continuity. Repair ground, if required.
	5. Speakers faulty.	5. Replace speaker as necessary.
	6. Radio faulty.	6. Refer to appropriate Diagnostic Service Information.
NO RADIO DISPLAY	1. Fuse faulty.	1. Check radio fuse and Ignition-Off Draw (IOD) fuse in Junction Block (JB). Replace fuses, if required.
	2. Radio connector faulty.	2. Check for loose or corroded radio connector. Repair, if required.
	3. Wiring faulty.	3. Check for battery voltage at radio connector. Repair wiring, if required.
	4. Radio ground faulty.	4. Check for continuity between radio chassis and a known good ground. There should be continuity. Repair ground, if required.
POOR RADIO RECEPTION	5. Radio faulty.	5. Refer to appropriate Diagnostic Service Information.
	1. Antenna faulty.	1. Refer to BODY AND CABLE, ANTENNA, DIAGNOSIS AND TESTING .
	2. Radio ground faulty.	2. Check for continuity between radio chassis and a known good ground. There should be continuity. Repair ground, if required.
	3. Radio noise suppression faulty.	3. Repair or replace ground strap as necessary.
	4. Radio faulty.	4. Refer to appropriate Diagnostic Service Information.
	5. Faulty rear window defogger.	5. Verify that the rear defogger grid is functioning properly, repair as necessary. Refer to DIAGNOSIS AND TESTING .
SOUND DISTORTION (VIBRATION FROM SPEAKER AREA, BUZZING - HUMMING)	1. Door trim panel loose or missing fasteners.	1. Inspect door trim panel and correct as necessary. Replace any missing fasteners.
	2. Water shield loose or misaligned.	2. Inspect water shield and adjust as required.
	3. Items placed in door trim panel map pockets vibrating or moving from side to side.	3. Remove items from door trim panel. Ensure that vibration is no longer present.
NO COMPACT DISC/DVD OPERATION	1. Faulty CD/DVD.	1. Insert known good CD/DVD and test operation.
	2. Foreign material on CD/DVD.	2. Clean CD/DVD and test operation.
	3. Condensation on CD/DVD or optics.	3. Allow temperature of vehicle interior to stabilize and test operation.
	4. Faulty radio.	4. Refer to appropriate Diagnostic Service Information.