Preliminary Inspections
WARNING: This page is about a different car, the 2004 Pontiac Sunfire and 2004 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
Tools Required: CD and Cassette Diagnostic Audio Kit. Refer to J 39916-A . See Special Tools and Equipment .
IMPORTANT:
When testing the audio system for poor reception or noise, the vehicle should be outside away from metal buildings and utility lines, with the hood and rear compartment closed.
IMPORTANT:
Inspect for any aftermarket equipment that may have been installed on the vehicle. If aftermarket equipment is found, disconnect the equipment and verify that the audio noise is still present.
- Verify that the antenna connector and the antenna coaxial cable are clean and tight.
- For reception concerns, first determine if the customer is within the listening area of the stations they are attempting to receive.
- Stations at the lower end of the FM band are more susceptible to audio noises than stations at the higher end.
- If the noise is only from one speaker, inspect for the following items before speaker replacement:
- Isolate the noise using theJ 39916-A . See Special Tools and Equipment .
- Inspect the speaker connections in order to ensure they are clean and tight. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
- Inspect for a loose or incorrectly installed speaker or surrounding trim. Loose trim may cause a buzz or flutter which sounds like a malfunctioning speaker.
- Ignition noise on the FM band may be an indication of an ignition system problem.
- Verify that all vehicle grounds are clean, tight, and free of corrosion.
- Inspect the rear defogger grid lines for large breaks or dark spots.
- Inspect the connections at the radio antenna module, if equipped, in order to ensure that they are clean and tight.
- Compare the customers vehicle to another of similar model and audio system in order to determine if the condition is abnormal.