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:

Mechanical
^ Radio chassis with or without tape player physically damaged, misaligned, any controls inoperative.
^ Digital audio compact disc changer physically damaged, misaligned, any controls inoperative.
^ Antenna and two-piece antenna cable or electric antenna physically damaged or misaligned.
^ Radio speakers mounting/speaker cones physically damaged, misaligned.
^ Radio ignition interference capacitor, radio frequency interference suppression bond and radio receiver hood bonding strap misaligned, cleanliness, and metal-to-metal contact.

Electrical
^ Failed fuses.
^ Damaged connectors.
^ Ignition switch.
^ Circuitry.
^ Damaged radio chassis.

3. If the fault is not visually evident, determine the symptom and proceed to the Symptom Charts. Diagnosis by Symptom