Diagnosis And Testing - Audio

Any diagnosis of the Audio system should begin with the use of a scan tool. Check for any Diagnostic Trouble Codes (DTCs) in DIAGNOSIS AND TESTING . If there are any DTCs, perform the appropriate diagnostic procedure before proceeding in this article .

Refer to the appropriate wiring information.

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.

AUDIO SYSTEM DIAGNOSTIC TABLE

CONDITION	POSSIBLE CAUSES	CORRECTION
RADIO INOPERATIVE	1. Fuse inoperative.	Check radio fuse
RADIO INOPERATIVE	2. Open wiring.	Check "No Response from Radio". Refer to DIAGNOSIS AND TESTING .
NO AUDIO - BUT RADIO LIGHTS UP	1. Antenna problem.	Perform the "Poor or No AM/FM Audio Reception" test. Refer to DIAGNOSIS AND TESTING .
	2. Radio or Amplifier (if equipped) connector damaged.	Check for loose or corroded radio/amplifier connector. Repair, as required.
	3. Wiring damaged.	Check for shorted or open wires. Repair wiring as required.
	4. Radio or Amplifier (if equipped) ground damaged.	Check for continuity between radio chassis and a known good ground. There should be continuity. Repair ground as required.
	5. Amplifier (if equipped) inoperative.	Refer to DIAGNOSIS AND TESTING .
	6. Speakers inoperative.	Refer to DIAGNOSIS AND TESTING .
NO RADIO DISPLAY	1. Fuse inoperative.	Check radio fuse, Replace fuses as required.
	2. Radio connector damaged.	Check for loose or corroded radio connector. Repair as required.
	3. Wiring damaged.	Check for battery voltage at radio connector. Repair wiring as required.
	4. Radio ground circuit damaged.	Check for continuity between radio chassis and a known good ground. There should be continuity. Repair ground as required.
	5. Radio inoperative.	Check "No Response from Radio". Refer to DIAGNOSIS AND TESTING .
POOR AM/FM RADIO RECEPTION	1. Antenna inoperative.	Perform the "Poor or No AM/FM Audio Reception" test. Refer to DIAGNOSIS AND TESTING .
	2. Radio ground damaged.	Check for continuity between radio chassis and a known good ground. There should be continuity. Repair ground as required.
	3. Radio inoperative.	Refer to DIAGNOSIS AND TESTING or DIAGNOSIS AND TESTING .
POOR SDAR AUDIO RECEPTION	1. SDAR Antenna Inoperative.	Perform the "Poor or No Satellite Audio Reception" test. Refer to DIAGNOSIS AND TESTING .
SOUND DISTORTION (VIBRATION FROM SPEAKER AREA, BUZZING - HUMMING)	1. Door trim panel loose or missing fasteners.	Inspect door trim panel and correct as necessary. Replace any missing fasteners.
	2. Water shield loose or misaligned.	Inspect water shield and adjust as required.
	3. Items placed in door trim panel map pockets vibrating or moving from side to side.	Remove items from door trim panel. Ensure that vibration is no longer present.