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 obvious signs of mechanical and electrical damage.

VISUAL INSPECTION CHART

Mechanical
- Audio unit physically damaged, misaligned; any control(s) inoperative
- Digital audio compact disc player physically damaged, misaligned; any control(s) inoperative
- Antenna cable physically damaged; misaligned connection(s)
- Radio speakers, mounting/speaker cones physically damaged, misaligned
- Radio ignition interference capacitors, radio frequency interference suppression bond misaligned (also check for cleanliness and metal-to-metal contact)

Electrical
- Central Junction Box (CJB) Fuse 1 (15 A)
- CJB Fuse 8 (5 A)
- Open connector(s)
- Corroded connector(s)
- Open or shorted circuit(s)

3. If the fault is not visually evident, determine the symptom and proceed to Symptom Chart. Symptom Related Diagnostic Procedures