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 integrated control panel, rear chassis unit and audio compact disc player 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 six general areas:
- antenna system
- integrated control unit
- radio speaker system
- radio noise suppression equipment
- rear chassis unit
- audio communications protocol network


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

VISUAL INSPECTION CHART

Mechanical
- Integrated control panel with or without tape player physically damaged, misaligned, any controls inoperative.
- Digital audio compact disc player physically damaged, misaligned, any controls inoperative.
- Radio antenna lead in cable, electric antenna or body physically damaged or misaligned connections.
- Radio speaker mounting/speaker cones physically damaged, misaligned.
- Radio ignition interference capacitor or radio frequency interference suppression bond misaligned, unclean and no metal-to-metal contact.
- Mobile telephone transceiver; mobile telephone handset, mobile telephone microphone, mobile telephone transceiver holder cradle physically damaged, misaligned.

Electrical
- Open fuses: fuse junction panel fuses 8 (5 A), 12 (5 A), 20 (5 A), 22 (5 A), 24 (5 A) or power distribution box fuse 17 (20 A).
- Open connectors.
- Corroded connectors.

3. If inspection reveals an obvious concern that is readily serviced, correct the concern before continuing with Inspection and Verification.
4. If a concern remains after the inspection, determine the symptom(s) and go to Symptom Chart. Symptom Related Diagnostic Procedures