Entertainment System Control Module: Service and Repair

Audio Control Module (ACM) Self-Diagnostic Mode

Late Build Audio Systems

NOTE: If the Audio Front Control Module (ACM) is inoperable, the ACM (Audio Front Control Module) part number may be obtained from a label affixed to the chassis.

1. Turn the ACM (Audio Front Control Module) on.

2. Operate the audio system in radio tuner (AM/FM) mode.

3. Press and hold preset buttons 3 and 6 for 3 seconds until the speaker walk test begins.
- The display indicates each speaker as it is tested.


4. NOTE: If the speaker walk test is the only test required, this procedure can be stopped after Step 3 by turning the ACM (Audio Front Control Module) off.
Before the speaker walk test is complete, carry out any of the following actions:





5. To exit the self-diagnostic mode, turn the ACM (Audio Front Control Module) off.