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

VISUAL INSPECTION CHART

Mechanical
^ Audio unit physically damaged, misaligned or any controls inoperative
^ Antenna or antenna cable physically damaged or misaligned
^ Speakers mounting/speaker cones physically damaged or misaligned
^ Radio ignition interference capacitor, radio frequency interference suppression bond or radio receiver hood bonding strap cleanliness and metal-to-metal contact

Electrical
^ Blown Battery Junction Box (BJB)
- Maxi-Fuse I/P (40 A)
- Maxi-Fuse IGN SW (40 A)
- Maxi-Fuse IGN SW (40 A)
- Mini-Fuse AUDIO (7.5 A)

^ Blown Central Junction Box (CJB)
- Fuse 27 (25A)
- Fuse 32 (15 A)
^ Damaged connectors
^ Damaged ignition switch
^ Damaged circuitry
^ Damaged audio unit

3. If the concern remains and the fault is not detected, proceed to the Symptom Chart to continue diagnostics. Symptom Related Diagnostic Procedures