Diagnosis And Testing - Audio System

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.

The hard wired circuits between components related to the audio system may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds. For proper wire repair, and connector repair procedures. Refer to STANDARD PROCEDURE . and. Refer to REMOVAL . Refer to INSTALLATION .

However, conventional diagnostic methods will not prove conclusive in the diagnosis of the electronic controls and communication between modules and other devices that provide some features of the audio system. The most reliable, efficient and accurate means to diagnose the audio system or the electronic controls and communication related to audio system operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.

NOTE:

The MIT019 Multi-Media Interface Tester special tool may also be used for testing where no Diagnostic Trouble Code (DTC) has been recorded, such as with Bluetooth® reception and phone pairing issues. Refer to DIAGNOSIS AND TESTING .

AUDIO SYSTEM DIAGNOSTIC TABLE
CONDITION	POSSIBLE CAUSES	CORRECTION
AUDIO SYSTEM INOPERATIVE	1. Fuse ineffective.	1. Check audio system fuses. If fuse requires replacement, repair the shorted circuit or component as required.
	2. Open wiring circuit.	2. Perform the No Response from Radio test. Refer to DIAGNOSIS AND TESTING .
	3. Security Gateway Module (SGW) inoperative.	Check "Scan Tool Will Not Communicate With Vehicle". Refer to DIAGNOSIS AND TESTING .
NO AUDIO - BUT RADIO LIGHTS UP	1. Antenna problem.	1. Perform the Poor or No AM/FM Audio Reception test. Refer to DIAGNOSIS AND TESTING .
	2. Radio or Amplifier (if equipped) connector damaged.	2. Check for loose or corroded radio/amplifier connector. Repair, as required.
	3. Open or shorted wiring circuit.	3. Check for shorted or open circuits. Repair wiring as required.
	4. Open Radio or Amplifier (if equipped) ground circuit.	4. Check for continuity between radio chassis or amplifier and a known good ground. There should be continuity. Repair ground as required.
	5. Amplifier (if equipped) ineffective.	5. Refer to DIAGNOSTIC CODE INDEX .
	6. Speakers ineffective.	6. Refer to DIAGNOSTIC CODE INDEX ..
NO RADIO DISPLAY	1. Fuse ineffective.	1. Check audio system fuses. If fuse requires replacement, repair the shorted circuit or component as required.
	2. Radio connector damaged.	2. Check for loose or corroded radio connector. Repair as required.
	3. Open feed wiring circuit.	3. Check for battery voltage at radio connector. Repair wiring as required.
	4. Open ground circuit.	4. Check for continuity between radio chassis and a known good ground. There should be continuity. Repair ground as required.
	5. Radio ineffective.	5. Perform the No Response from Radio test. Refer to DIAGNOSIS AND TESTING .
POOR AM/FM RADIO RECEPTION	1. Antenna ineffective.	1. Perform the Poor or No AM/FM Audio Reception test. Refer to DIAGNOSIS AND TESTING .
	2. Open ground circuit.	2. Check for continuity between radio chassis and a known good ground. There should be continuity. Repair ground as required.
	3. Radio ineffective.	3. or. Refer to DIAGNOSTIC CODE INDEX . Refer to DIAGNOSIS AND TESTING .
POOR SDAR AUDIO RECEPTION	1. SDAR antenna ineffective. 2. Coax cable ineffective. 3.Head unit ineffective.	1. Perform the Poor or No Satellite Audio Reception test. Refer to POOR OR NO SATELLITE AUDIO RECEPTION . 2. Perform the Poor or No Satellite Audio Reception test. Refer to POOR OR NO SATELLITE AUDIO RECEPTION . 3. Perform the Poor or No Satellite Audio Reception test. Refer to POOR OR NO SATELLITE AUDIO RECEPTION .
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.