AUDIO
Any diagnosis of the Audio system should begin with the use of the scan tool. For information on the use of the scan tool, refer to the appropriate Diagnostic Service information.
For complete circuit diagrams, refer to the appropriate wiring information.
AUDIO SYSTEM DIAGNOSIS
CONDITION
POSSIBLE CAUSES
CORRECTION
NO AUDIO AT ALL SPEAKERS - RADIO DISPLAY AND CONTROLS ARE OPERATIONAL
1. Amplifier fuse faulty, if equipped.
1. Check and replace fuses, if required.
2. Wiring to amplifier faulty, if equipped.
2. Verify radio on/off input to amplifier and verify battery and ground connections. Repair wiring as necessary.
3. Radio faulty.
3. Refer to appropriate Diagnostic Service Manual.
4. Amplifier faulty, if equipped.
4. Replace amplifier.
NO AUDIO AT SOME SPEAKERS - RADIO DISPLAY AND CONTROLS ARE OPERATIONAL
1. Wiring faulty between amplifier and speaker.
1. Repair wiring as necessary.
2. Wiring faulty between radio and amplifier.
2. Refer to speaker diagnostics. Repair wiring as necessary.
3. Wiring faulty between radio and speaker.
3. Check wiring for open or short, repair wiring as necessary.
4. Speaker(s) faulty.
4. Refer to speaker diagnostics.
5. Amplifier faulty.
5. Replace amplifier.
6. Radio faulty.
6. Refer to appropriate Diagnostic Service Manual.
POOR AUDIO AT ALL SPEAKERS - RADIO DISPLAY AND CONTROLS ARE OPERATIONAL
1. Power/ground wiring to amplifier open or shorted.
1. Repair wiring as necessary.
2. Power/ground wiring open or shorted.
2. Repair wiring as necessary.
3. Amplifier faulty.
3. Replace amplifier.
4. Radio faulty.
4. Refer to appropriate Diagnostic Service Manual.
POOR AUDIO AT SOME SPEAKERS - RADIO DISPLAY AND CONTROLS ARE OPERATIONAL
1. Wiring faulty between amplifier and speaker.
1. Repair wiring as necessary.
2. Wiring faulty between radio and amplifier.
2. Refer to speaker diagnostics. Repair wiring as necessary.
3. Wiring faulty between radio and speaker.
3. Check wiring for open or short, repair wiring as necessary.
4. Speakers faulty.
4. Refer to speaker diagnostics.
5. Amplifier faulty.
5. Replace amplifier.
6. Radio faulty.
6. Refer to appropriate Diagnostic Service Manual.
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 RADIO DISPLAY - AUDIO AND CONTROLS ARE OPERATIONAL
1. Radio faulty.
1. Refer to appropriate Diagnostic Service Manual.
NO RADIO DISPLAY - AUDIO AND CONTROLS ARE NOT OPERATIONAL
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.
POOR RADIO RECEPTION WITH KEY IN ACCESSORY OR IGNITION ON POSITION
1. Antenna faulty.
1. Replace the antenna.
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 Manual.
5. Faulty rear window defogger.
5. Verify that the rear defogger grid is functioning properly, repair as necessary
(Refer to 08 - Electrical/Heated Glass - Diagnosis and Testing).
NO COMPACT DISC OR 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 CD/DVD player.
4. Refer to appropriate Diagnostic Service Manual.
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