Poor or No Sound With XM Radio (Audio-Navigation Unit Does Display XM Channels)

Audio System Symptom Troubleshooting - Poor or no sound with XM radio (Audio-navigation unit does display XM channels)

Poor or no sound with XM radio (Audio-navigation unit does display XM channels)

NOTE:
* Check the vehicle battery condition first Battery Test.
* Check the radio reception in an open area. Poor reception/interference can be caused by tall buildings, mountains, or high-voltage power lines are nearby.
* If you can only tune to channel 000, 001, 174, and 247, make sure the audio-navigation unit is set to channel mode (see the Owner's Manual), if it is set to channel mode, call XM Radio customer support, and check the account activation status.
* Check the connectors for poor connections or loose terminals.

1. Problem verification:

Problem verification
-1. Park the vehicle outside with a clear view of the southern horizon.

-2. Turn the ignition switch to ON (II).

-3. Turn on the audio system, and set the proper XM radio station.

Does the XM radio play?
-YES- Intermittent failure, the system is OK at this time.
-NO- The failure is duplicated, go to step 2.

2. Shorted wire check (GA_AUDIO lines):

Shorted wire check (GA_AUDIO lines)
-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the following connectors.





-3. Check for continuity between these test points and body ground individually.














Is there continuity?
-YES- There is a short to body ground in the wire(s) between the audio-navigation unit and the XM receiver. Replace the affected shielded harness.
-NO- Go to step 3.

3. Shorted wire check (SH_GA_AUDIO line to another lines)

Shorted wire check (SH_GA_AUDIO line to another lines)
-1. Check for continuity between test points 1 and 2.














Is there continuity between any of the terminals?
-YES- There is a short in the wires between the audio-navigation unit and the XM receiver. Replace the affected shielded harness.
-NO- Go to step 4.

4. Open wire check (GA_AUDIO lines):

Open wire check (GA_AUDIO lines)
-1. Check for continuity between test points 1 and 2.


















Is there continuity?
-YES- Go to step 5.
-NO- There is an open in the wire(s) between the audio-navigation unit and the XM receiver. Replace the affected shielded harness.

5. Audio-navigation unit check:

Audio-navigation unit check
-1. Substitute a known-good XM receiver XM Receiver Removal and Installation, and recheck.

Does the symptom go away?
-YES- Replace the original XM receiver.
-NO- Replace the audio-navigation unit Audio-Navigation Unit Removal and Installation.