XM Radio Display Is Blank and No Station Information Is Displayed
XM radio display is blank and no station information is displayed1. Turn the ignition switch to ACC (I).
2. Measure the voltage between XM receiver connector A (14P) No. 1 terminal and body ground.
Is there battery voltage?
YES - Go to step 3.
NO - Repair open in the wire between audio unit connector B (14P) No. 7 ('05 model) or No. 1 ('06-07 models) terminal and XM receiver connector A (14P) No. 1 terminal.
3. Measures the voltage between XM receiver connector A (14P) No. 11 terminal and body ground.
Is there less than 0.1 V?
YES - Go to step 4.
NO - Repair open in the wire between XM receiver connector A (14P) No. 11 terminal and audio unit connector B (14P) No. 11 terminal.
4. Turn the ignition switch to LOCK (0).
5. Measure the voltage between audio unit connector B (14P) No. 2 terminal and body ground.
Is there 10 V or more present?
YES - Go to step 6.
NO - Substitute a known-good XM receiver and recheck. If 10 V or more are present, replace the original XM receiver.
6. Turn the ignition switch ON (II).
7. Measure the voltage between audio unit connector B (14P) No. 2 terminal and body ground.
Is there less than 0.5 V?
YES - Go to step 8.
NO - Substitute a known-good audio unit and recheck. If 0.5 V or less are present, replace the original audio unit.
8. Disconnect the XM receiver connector A (14P), audio unit connector B (14P), and the navigation display unit connector (20P).
9. Check for continuity between XM receiver connector A (14P) and body ground according to the table. Then check for continuity between the same terminals listed in the table and XM receiver connector A (14P) No. 3 terminal (the harness shield).
Is there continuity?
YES - Repair short in the wire between the audio unit and the XM receiver, or replace the appropriate shielded harness.
NO - Go to step 10.
10. Check for continuity between XM receiver connector A (14P) and audio unit connector B (14P) according to the table.
Is there continuity?
YES - Go to step 11.
NO - Repair open in the wire between audio unit and XM receiver.
11. Disconnect the navigation display unit connector (20P).
12. Check for continuity between XM receiver connector A (14P) and navigation display unit connector (20P) according to the table.
Is there continuity?
YES - Substitute a known-good XM receiver, 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.
NO - Repair open in the wire between the XM receiver and the navigation display unit.