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
NOTE:
Check the vehicle battery condition first.
Check the connectors for poor connections or loose terminals.
1.
Problem verification:

Problem verification
?1.
Press the engine start/stop button to select the ON mode.

?2.
Turn on the audio system, and select the XM radio.

Is the XM radio information displayed?

     
YES
     
     
     
Intermittent failure, the system is OK at this time.?
     
NO
     
     
     
The failure is duplicated, go to step 2.
2.
Determine possible failure area (audio system, others):

Determine possible failure area (audio system, others)
?1.
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 3.
     
NO
     
     
     
3.
Determine possible failure area (GA +B line, others):

Determine possible failure area (GA +B line, others)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connector.

?3.
Measure the voltage between test points 1 and 2.
Test condition
OFF mode
 
XM receiver connector A (14P): disconnected
Test circuit
GA +B
Test point 1
XM receiver connector A (14P) No. 6 (WHT)
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
The GA +B wire is OK. Go to step 6.
     
NO
     
     
     
Go to step 4.
4.
Open wire check (GA +B line):

Open wire check (GA +B line)
?1.
Measure the voltage between test points 1 and 2.
Test condition
OFF mode
 
XM receiver connector A (14P): disconnected
Test circuit
GA +B
Test point 1
audio-navigation unit connector D (12P) No. 12 (WHT)
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
Repair an open in the wire between the audio-navigation unit and the XM receiver.?
     
NO
     
     
     
The GA +B wire is not open. Go to step 5.
5.
Shorted wire check (GA +B line):

Shorted wire check (GA +B line)
?1.
Disconnect the following connectors.

?2.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
 
XM receiver connector A (14P): disconnected
 
Audio-navigation unit connector D (12P): disconnected
 
HandsFreeLink control unit connector A (32P): disconnected
Test circuit
GA +B
Test point 1
XM receiver connector A (14P) No. 6 (WHT)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short to body ground in the wire between the audio-navigation unit and the XM receiver.?
     
NO
     
     
     
6.
Determine possible failure area (GA GND line, others):

Determine possible failure area (GA GND line, others)
?1.
Reconnect XM receiver connector A (14P).

?2.
Press the engine start/stop button to select the ON mode.

?3.
Measure the voltage between test points 1 and 2.
Test condition
ON mode
Test circuit
GA GND
Test point 1
XM receiver connector A (14P) No. 10 (PNK)
Test point 2
Body ground


Is there less than 0.2 V?

     
YES
     
     
     
The GA GND wire is OK. Go to step 8.
     
NO
     
     
     
Go to step 7.
7.
Open wire check (GA GND line):

Open wire check (GA GND line)
?1.
Measure the voltage between test points 1 and 2.
Test condition
ON mode
Test circuit
GA GND
Test point 1
Audio-navigation unit connector D (12P) No. 6 (PNK)
Test point 2
Body ground


Is there any voltage?

     
YES
     
     
     
     
NO
     
     
     
Repair an open or high resistance in the wire between the audio-navigation unit and the XM receiver.?
8.
Determine possible failure area (GA SYS ON line, others):

Determine possible failure area (GA SYS ON line, others)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Measure the voltage between test points 1 and 2.
Test condition
OFF mode
Test circuit
GA SYS ON
Test point 1
XM receiver connector A (14P) No. 5 (RED)
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
The GA SYS ON wire is OK. Go to step 10.
     
NO
     
     
     
Go to step 9.
9.
Open wire check (GA SYS ON line):

Open wire check (GA SYS ON line)
?1.
Measure the voltage between test points 1 and 2.
Test condition
OFF mode
Test circuit
GA SYS ON
Test point 1
Audio-navigation unit connector D (12P) No. 8 (RED)
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
Repair an open in the wire between the audio-navigation unit and the XM receiver.?
     
NO
     
     
     
10.
Audio-navigation unit check:

Audio-navigation unit check
?1.
Press the engine start/stop button to select the ON mode.

?2.
Measure the voltage between test points 1 and 2.
Test condition
ON mode
Test circuit
GA SYS ON
Test point 1
XM receiver connector A (14P) No. 5 (RED)
Test point 2
Body ground


Is there less than 0.2 V?

     
YES
     
     
     
Go to step 11.
     
NO
     
     
     
11.
Open wire check (GA BUS+ line, GA BUS? line):

Open wire check (GA BUS+ line, GA BUS? line)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connectors.

?3.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
 
Audio-navigation unit connector D (12P): disconnected
 
XM receiver connector A (14P): disconnected
Test circuit
GA BUS+
Test point 1
Audio-navigation unit connector D (12P) No. 7 (BRN)
Test point 2
XM receiver connector A (14P) No. 12 (BRN)

Test circuit
GA BUS?
Test point 1
Audio-navigation unit connector D (12P) No. 1 (YEL)
Test point 2
XM receiver connector A (14P) No. 11 (YEL)


Is there continuity?

     
YES
     
     
     
The GA BUS+ and the GA BUS? wires are OK. Go to step 12.
     
NO
     
     
     
There is an open in the wire(s) between the audio-navigation unit and the XM receiver. Replace the affected shielded harness.?
12.
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