Symptom Troubleshooting

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) (with navigation)

NOTE:

- Check the vehicle battery condition first.

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

5. Disconnect audio-navigation unit connector D (14P).
NOTE: Eject all the CDs before remove the audio-navigation unit to prevent damaging the player's load mechanism.

6. Disconnect XM receiver connector A (14P) and USB adapter unit connector A (14P).

7. Check for continuity between audio-navigation 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-navigation unit, the USB adapter unit, and the XM receiver. Replace the affected shielded harness.

NO - Go to step 8.






8. Check for continuity between the audio-navigation 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-navigation unit, the USB adapter 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-navigation unit connector D (14P) according to the table.





Is there continuity?
YES - Substitute a known-good XM receiver, XM Receiver Replacement (With XM Radio) then reconnect all 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 XM receiver. Replace the affected shielded harness.