Initial Inspection and Diagnostic Overview

1. Verify the customer concern by operating the electronic audio system with the engine running and the vehicle in and out of motion.

NOTE: The Audio Control Module (ACM) is also referred to as the audio unit.

2. Visually inspect for obvious signs of mechanical and electrical damage.

Visual Inspection Chart:

3. If the fault is not visually evident, proceed to diagnose the audio system by:
^ entering the speaker walk-around test. Speaker Walk-Around Test
^ entering ACM self-diagnostic mode (P100i only). ACM Self-Diagnostic Mode (P100i Only)