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.
Check the radio reception in an open area. Poor reception/interference can be caused by tall buildings, mountains, or high-voltage power lines are nearby.
If you can only tune to channel 000, 001, and 174, make sure the XM radio is set to channel mode (see the Owner's Manual), if it is set to channel mode, call XM Radio customer support at 800-852-9696, and check the account activation status.
Check the connectors for poor connections or loose terminals.
1.
Determine possible failure area (audio system, others):

Determine possible failure area (audio system, others)
?1.
Press the engine start/stop button to select the ON mode.

?2.
Check that the audio system is operating normally, from different audio sources (AM/FM and CD) and the speaker sound levels are normal.

Does the audio system work normally and is the audio output from the speaker normal when playing various audio sources?

     
YES
     
     
     
Go to step 2.
     
NO
     
     
     
2.
Problem verification:

Problem verification
?1.
Park the vehicle outside with a clear view of the southern horizon.

?2.
Turn on the audio unit, and select the XM.

?3.
Set the proper XM radio station.

Does the XM radio play?

     
YES
     
     
     
Intermittent failure, the system is OK at this time.?
     
NO
     
     
     
The failure is duplicated, go to step 3.
3.
Determine possible failure area (related unit, others):

Determine possible failure area (related unit, others)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connector.

?3.
Press the engine start/stop button to select the ON mode.

?4.
Turn on the audio unit, and select the XM.

Does the XM radio play?

     
YES
     
     
     
     
NO
     
     
     
Go to step 4.
4.
Shorted wire check (GA AUDIO lines) 1:

Shorted wire check (GA AUDIO lines) 1
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connectors.

?3.
Check for continuity between these test points and body ground individually.
Test condition
OFF mode
 
HandsFreeLink control unit connector A (32P): disconnected
 
Audio unit connector D (12P): disconnected
 
XM receiver connector A (14P): disconnected

Connector
Test circuit
Terminal
Audio unit connector D (12P)
GA AUDIO L+
No. 9 (LT BLU)
GA AUDIO L?
No. 3 (PNK)
GA AUDIO R+
No. 10 (BRN)
GA AUDIO R
No. 4 (LT GRN)


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
     
     
     
The GA AUDIO wires are not shorted to ground. Go to step 5.
5.
Shorted wire check (GA AUDIO lines) 2:

Shorted wire check (GA AUDIO lines) 2
?1.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
 
HandsFreeLink control unit connector A (32P): disconnected
 
Audio unit connector D (12P): disconnected
 
XM receiver connector A (14P): disconnected

Test circuits
Connector: Audio unit connector D (12P)
Test point 1
Test points 2
SH GA AUDIO to
GA AUDIO R?, GA AUDIO R+, GA AUDIO L?, GA AUDIO L+
No. 5 (GRY)
No. 4 (LT GRN), No. 10 (BRN),
No. 3 (PNK), No. 9 (LT BLU)
GA AUDIO R? to
GA AUDIO R+, GA AUDIO L?, GA AUDIO L+
No. 4 (LT GRN)
No. 10 (BRN), No. 3 (PNK),
No. 9 (LT BLU)
GA AUDIO R+ to
GA AUDIO L?, GA AUDIO L+
No. 10 (BRN)
No. 3 (PNK), No. 9 (LT BLU)
GA AUDIO L?to
GA AUDIO L+
No. 3 (PNK)
No. 9 (LT BLU)


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
     
     
     
The GA AUDIO wires are not shorted in the wires. Go to step 6.
6.
Open wire check (GA AUDIO lines):

Open wire check (GA AUDIO lines)
?1.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
 
HandsFreeLink control unit connector A (32P): disconnected
 
Audio unit connector D (12P): disconnected
 
XM receiver connector A (14P): disconnected

Test circuit
Test point 1:
Audio unit connector D (12P)
Test point 2:
XM receiver connector A (14P)
GA AUDIO L+
No. 9 (LT BLU)
No. 1 (GRN)
GA AUDIO L?
No. 3 (PNK)
No. 7 (BLU)
GA AUDIO R+
No. 10 (BRN)
No. 2 (WHT)
GA AUDIO R
No. 4 (LT GRN)
No. 8 (RED)



Is there continuity?

     
YES
     
     
     
The GA AUDIO wires are OK. Go to step 7.
     
NO
     
     
     
There is an open in the wire(s) between the audio unit and the XM receiver. Replace the affected shielded harness.?
7.
XM receiver check (substitution):

XM receiver check (substitution)
?1.
Substitute a known-good XM receiver.

?2.
Reconnect all the connectors, and recheck.

Does the symptom go away?

     
YES
     
     
     
Replace the original XM receiver.?
     
NO