Initial Inspection and Diagnostic Overview

NOTE: Many customers do not understand the limitations of FM reception. Refer the customer to the Owner Guide for information about the limitations of FM radio performance.

Internal diagnostic examination of the radio chassis should be left to the authorized radio service center. However, the automotive technician should be able to analyze and isolate radio reception conditions to the proper area or component causing the condition. All radio conditions can be isolated to one of five general areas:
- Antenna system
- Radio chassis
- Radio speaker system
- Radio noise suppression equipment
- Premium sound system

1. Verify the customer's concern by operating the electronic audio system to duplicate the condition.
2. Inspect to determine if one of the following mechanical or electrical concerns apply:

VISUAL INSPECTION CHART

Mechanical
- Radio chassis physically damaged, any controls inoperative.
- Digital audio compact disc player physically damaged, any controls inoperative.
- Antenna and two-piece antenna cable or electric antenna physically damaged, open connections.
- Radio speakers mounting/speaker cones physically damaged.
- Radio ignition interference capacitor, radio frequency interference suppression bond and radio receiver hood bonding strap broken, cleanliness and metal-to-metal contact.

Electrical
- Open fuses.
- Open connections.
- Corrode connectors.
- Ignition switch.

3. If the inspection reveals obvious concern(s) that can be readily identified, service as required.
4. If the concern(s) remains after the inspection, determine the symptom(s) and go to the Symptom Chart. Diagnosis by Symptom