Poor Or No Sound With XM Radio (Audio Unit Does Display XM Channels)
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)
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. Compare it to a known-good vehicle whenever possible. Poor reception/interference can be caused by tall buildings, mountains, or nearby high-voltage power lines 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 satellite 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 Code List Audio System Error Codes.�
NO -
- With navigation system: Go to step 8.
- Without navigation system: Go to step 4.
4. Turn the ignition switch to LOCK (0).
5. Disconnect audio unit connector B (14P) and XM receiver connector A (14P).
6. Check for continuity between body ground and XM receiver connector A (14P) terminals according to the table. Then check for continuity between the same terminals listed in the table and audio unit connector B (14P) terminal No. 4 (the harness shield).
Is there continuity?
YES -
There is a short in the wire between the audio unit and the XM receiver or short between the shield wire. Replace the affected shielded harness.�
NO -
Go to step 7.
7. Check for continuity between XM receiver connector A (14P) terminals and audio unit connector B (14P) terminals 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. If the symptom/indication is still present, replace the audio unit Audio Unit Removal/Installation.�
NO -
There is an open in the wire(s) between the audio unit and the XM receiver. Replace the affected shielded harness.�
8. Disconnect audio disc changer connector B (14P) and XM receiver connector A (14P).
9. Check for continuity between body ground and XM receiver connector A (14P) terminals according to the table. Then check for continuity between the same terminals listed in the table and audio disc changer connector B (14P) terminal No. 4 (the harness shield).
Is there continuity?
YES -
There is a short in the wire(s) between the audio disc changer and the XM receiver or a short between the shield wire. Replace the affected shielded harness.�
NO -
Go to step 10.
10. Check for continuity between XM receiver connector A (14P) terminals and audio disc changer connector B (14P) terminals according to the table.
Is there continuity?
YES -
Go to step 11.
NO -
There is an open in the wire(s) between the audio disc changer and the XM receiver. Replace the affected shielded harness.�
11. Disconnect audio disc changer connector A (18P) and audio unit connector B (14P).
12. Check for continuity between body ground and audio disc changer connector A (18P) terminals according to the table.
Check for continuity between the same terminals listed in the table and the XM receiver connector A (18P) terminal No. 11 (the harness shield).
Is there continuity?
YES -
There is a short in the wire(s) between the audio disc changer and the audio unit. Replace the affected shielded harness.�
NO -
Go to step 13.
13. Check for continuity between the audio disc changer connector A (18P) terminals and audio unit connector B (14P) terminals according to the table.
Is there continuity?
YES -
Substitute a known-good XM receiver XM Receiver Removal/Installation, and recheck. If the symptom/indicated goes away, replace the XM receiver XM Receiver Removal/Installation. If the symptom/indicated is still present, replace the audio unit Audio Unit Removal/Installation.�
NO -
There is an open in the wire(s) between the audio disc changer and the audio unit.�