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

Symptom Troubleshooting: Poor or no sound with XM radio (Navigation unit does display XM channels)

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

NOTE:

- Check the vehicle battery condition first. Testing and Inspection

- Check the MX radio reception in an open area, Poor reception/interference can be caused by nearby tall buildings, mountains, or high-voltage power lines.

- Check the connectors for poor connections or loose terminals.

- If you can only tune to channel 000, 001, 174, and 247, make sure the audio-navigation unit is set to channel mode, if it is set to channel mode, call XM Satellite Radio customer support and check the account activation status.

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

2. Turn on the audio-navigation unit and select XM radio.

3. Check for an error message on the display.

Are there any messages displayed?
YES - Go to Error Codes. Audio System Error Codes

NO - Go to step 4.


4. Turn the ignition switch to LOCK (0).

5. Disconnect audio-navigation unit connector E (14P), USB adapter unit connector A (14P), and XM receiver connector A (14P).

6. Check for continuity between XM receiver connector A (14P) and body ground according to the table.





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 7.






7. Check for continuity between terminals of XM receiver connector A (14P) according to the table.





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 8.






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





Is it connected properly?
YES - Substitute a known-good XM receiver, Service and Repair then reconnect all of the connectors and recheck. If the symptom/indication goes away, replace the original XM receiver. If the symptom/indication is still present, replace the audio-navigation unit. Audio-Navigation Unit Removal/Installation (With Navigation)

NO - There is an open in the wire(s) between the audio-navigation unit and the XM receiver. Replace the affected shielded harness.