Symptom Troubleshooting

Audio System 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 Battery Test.
- Check the connectors for poor connections or loose terminals.

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





Is there battery voltage?

YES -

Go to step 3.

NO -

Go to step 2.

2. Measure the voltage between audio unit connector C (14P) terminal No. 1 and body ground.





Is there battery voltage?

YES -

Repair an open or high resistance in the wire between the XM receiver and the audio unit.

NO -

Substitute a known-good audio unit Audio Unit Removal/Installation, and recheck. If the symptom/indication goes away, replace the original audio unit Audio Unit Removal/Installation.

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

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





Is there less than 0.2 V?

YES -

Go to step 5.

NO -

Repair an open or high resistance in the wire between the XM receiver and the audio unit.

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

6. Disconnect audio unit connector C (14P) and XM receiver connector A (14P).

7. Check for continuity between XM receiver connector A (14P) terminal No. 2 and body ground.





Is there continuity?

YES -

Repair a shot to body ground in the wire between the XM receiver and the audio unit.

NO -

Go to step 8.

8. Check for continuity between audio unit connector C (14P) terminal No. 2 and XM receiver connector A (14P) terminal No. 2.





Is there continuity?

YES -

Go to step 9.

NO -

Repair an open in the wire between the audio unit and the XM receiver.

9. Disconnect the HandsFreeLink control unit 32P connector and audio display-USB adapter control unit connector A (32P).

10. Check for continuity between body ground and audio unit connector C (14P) 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 11.

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









Is there continuity between any of the terminals?

YES -

There is a short in the wires between the audio unit and the XM receiver. Replace the affected shielded harness.

NO -

Go to step 12.

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













Is there continuity?

YES -

Substitute a known-good audio unit Audio Unit Removal/Installation, and recheck. If the symptom/indication goes away, replace the original audio unit Audio Unit Removal/Installation. If the symptom/indication is still present, replace the XM receiver XM Receiver Removal/Installation.

NO -

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