Flow of Diagnosis

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

Mechanical
^ Radio chassis physically damaged, misaligned, any control(s) inoperative.
^ Digital audio compact disc player physically damaged, misaligned, any 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).
^ Ignition switch open or shorted circuit(s).

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