Poor Or No Sound With XM Radio (Audio Unit Does Display XM Channels) (Without Navigation With XM Radio)

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

Poor or no sound with XM radio (audio unit does display XM channels) (without navigation)

NOTE:

- Check the vehicle battery condition first Testing and Inspection.
- Check the radio reception in an open area. Compare it to a known-good vehicle whenever possible. Poor reception/interference can be caused by tall buildings, mountains, or high-voltage power lines that are nearby.
- If you can only tune to channel 000, 001, 174, and 247 make sure the audio unit is set to channel mode (see Owner's Manual). If it is set to channel mode, call XM Radio customer support and check the account activation status.

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

2. Turn on the audio 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 unit connector D (14P).

6. Disconnect XM receiver connector A (14P).

7. Check for continuity between audio unit connector D (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 unit and the XM receiver. Replace the affected shielded harness.�

NO -

Go to step 8.

8. Check for continuity between the terminals of audio unit connector D (14P) according to the table.









Is there continuity between any of the terminals?

YES -

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

NO -

Go to step 9.

9. Check for continuity between XM receiver connector A (14P) and audio unit connector D (14P) according to the table.













Is there continuity?

YES -

Substitute a known-good XM receiver XM Receiver Replacement, then reconnect all the connectors, and recheck. If the symptom/indication goes away, replace the original XM receiver XM Receiver Replacement. If the symptom/indication is still present, replace the audio unit Audio Unit Removal/Installation (Without Navigation).�

NO -

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