Flow of Diagnosis

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; refer to the Visual Inspection Chart.

VISUAL INSPECTION CHART

Mechanical
^ Radio chassis physically damaged, misaligned, and control(s) inoperative
^ Digital audio compact disc player physically damaged, misaligned, and control(s) inoperative
^ Antenna or antenna cable physically damaged, misaligned connection(s)
^ Radio speakers, mounting/speaker cones physically damaged, misaligned
^ Radio ignition interference capacitors, radio frequency interference suppression bond, and radio receiver good bonding strap misaligned, (also check for cleanliness and metal-to-metal contact)

Electrical
^ Open fuse(s)
^ Open connector(s)
^ Corroded connector(s)
^ Open or shorted circuit(s)

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