Radio Poor Reception

Radio Poor Reception

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview

Circuit/System Testing

Important: Perform the Audio System Troubleshooting Hints to properly identify the customers concern before using this diagnostic.

1. With the ignition OFF, disconnect the ground harness connector at the antenna. Test for less than 1.0 ohm of resistance between the antenna ground circuit terminal 1 and chassis ground

• If greater than the specified range, test the ground circuit for an open/high resistance.

2. With the ignition OFF, disconnect the antenna cable from the radio. With a DMM, verify there is less than 0.20 ohms between the negative battery cable and the coaxial cable metal outer shield.

• If greater than 0.20 ohms, replace the antenna coax cable.

3. Disconnect the coax cable from the antenna mast. With a DMM, verify there is less than 3.5 ohms between the radio end coaxial cable conductor and the antenna end coaxial cable conductor.

• If greater than 3.5 ohms, replace the coax cable.

• If no problems are found with the coax cable or the grounding of the antenna mast replace the radio.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

* Control Module References for radio replacement, setup, and programming
* Fixed Antenna Replacement Verification Tests