Initial Inspection and Diagnostic Overview

1. Verify the customer concern by operating the audio system with the engine running (vehicle in and out of motion).
2. Visually inspect for the following obvious signs of mechanical and electrical damage.

VISUAL INSPECTION CHART

Mechanical
- Radio chassis physically damaged, misaligned, any control(s) inoperative
- Antenna or cable physically damaged, misaligned connection(s)
- Radio speakers or mountings physically damaged, misaligned
- Radio ignition interference capacitor or radio receiver grounding strap misaligned (also check for cleanliness and metal-to-metal contact)

Electrical
- Open fuse(s)
- Open connector(s)
- Corroded connector(s)
- Ignition switch
- 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