AM and FM radio reception is dependent on the following components:

Poor AM and FM radio reception is dependent on multiple influences, some of which may not be vehicle related. Areas which have high RF traffic or block the signal path may cause a degradation in radio reception. Radio reception may also be influenced by items within the vehicle, but not part of the radio system. Such examples are aftermarket electrical accessories or other items which may generated noise in the vehicle electrical system.

Schematic Reference

Radio/Navigation System Schematics

Connector End View Reference

Entertainment/Communication Connector End Views

Electrical Information Reference

Scan Tool Reference

Scan Tool Data List

Antenna Coaxial Cable Testing

1. The antenna coax may have one or two sections between the radio and the mast antenna.

Note: For steps 2 - 5, perform the tests on each of the disconnected coax cables.

⇒	If greater than the specified range, replace the antenna coax.

2. Test for infinite resistance between the antenna coax center terminal and ground.

⇒	If less than the specified value, replace the antenna coax.

3. Test for less than 5 ohms of resistance on the antenna coax center terminal from end to end.

⇒	If greater than the specified range, replace the antenna coax.

4. Test for less than 5 ohms of resistance on the antenna coax outer shield from end to end.

⇒	If greater than the specified range, replace the antenna coax.

5. Test for infinite resistance between the coax center terminal and the outer shield.

⇒	If less than the specified value, replace the antenna coax.

6. Reconnect all of the antenna coax cables.
7. Ignition ON, radio ON, verify radio reception has improved.

⇒	If there is still poor reception, replace the radio.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.