Symptom Troubleshooting

Symptom Troubleshooting: XM radio display is blank and no station information is displayed

XM radio display is blank and no station information is displayed (without navigation)

NOTE:

- Check the vehicle battery condition first.

- Check the connectors for poor connections or lose terminals.

1. Measure the voltage between body ground and XM receiver connector A (14P) terminals No. 1 and No. 7 individually.

Is there battery voltage?
YES - Go to step 2.

NO - Repair open in the wire between the No. 9 (10 A) fuse in the under-hood fuse/relay box and XM receiver connector A (14P) terminals No. 1 and/or No. 7.






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

3. Measure the voltage between XM receiver connector A (14P) terminal No. 11 and body ground.

Is there less than 0.1 V?
YES - Go to step 4.

NO - Repair open in the wire between the XM receiver connector A (14P) terminal No 11 and body ground (G551).. Floor Wire Harness (Right Branch) Connector and Harness Locations






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

5. Measure the voltage between XM receiver connector A (14P) terminal No. 2 and body ground.

Is there battery voltage?
YES - Go to step 6.

NO - Substitute a known-good XM receiver, XM Receiver Replacement (With XM Radio) and recheck. If 10 V or more are present, replace the original XM receiver.






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

7. Measure the voltage between the audio unit connector D (14P) terminal No. 2 and body ground.

Is there less than 0.1 V?
YES - Go to step 8.

NO - Substitute a known-good audio unit, Audio Unit Removal/Installation (Without Navigation) and recheck. If 0.5 V or less are present, replace the original audio unit.






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

9. Disconnect audio unit connector D (14P).

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

11. 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 12.






12. Check for continuity between the 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 13.






13. Check for continuity between audio unit connector D (14P) and XM receiver connector A (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 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.