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

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

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

NOTE:

- Check the vehicle battery condition first Testing and Inspection.
- Check the connectors for poor connections or loose terminals.
- 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 owners manual), if it is set to channel mode, call XM Satellite Radio client support, and check the account activation status.

1. Turn the ignition switch to ON (II).

2. Turn on the audio system and select XM radio.

3. Check for an error message on the display.

Are there any messages displayed?

YES -

Go to error code list Audio System Error Codes.�

NO -

Go to step 4.

4. Disconnect these items:

- Audio-navigation unit connector E (14P)
- XM receiver connector A (14P)
- Audio disc changer 13P connector
- USB adapter unit connector A (14P) (if equipped)

5. Check for continuity between audio-navigation unit connector E (14P) and body ground according to the table. Then check for continuity between the same terminals listed in the table and audio-navigation unit connector E (14P) terminal No. 4 (the harness shield).









Is there continuity?

YES -

There is a short in the wire(s) between the audio-navigation unit and the XM receiver. Replace the affected shielded harness.�

NO -

Go to step 6.

6. Check for continuity between XM receiver connector A (14P) and audio-navigation unit connector E (14P) according to the table.









Is there continuity?

YES -

Substitute a known-good XM receiver XM Receiver Removal/Installation, then reconnect all connectors, and recheck. If the symptom/indication goes away, replace the original XM receiver XM Receiver Removal/Installation. If symptom/indication is still present, replace the audio-navigation unit ('07-09 models) Audio-Navigation Unit Removal/Installation or audio-navigation unit ('10 model) Audio-Navigation Unit Removal/Installation.�

NO -

There is an open in the wire(s) between the audio-navigation unit and the XM receiver. Replace the affected shielded harness.�