Navigation System Symptom Troubleshooting - Navigation switch panel button illumination does not work
Navigation switch panel button illumination does not work
NOTE:
Check the vehicle battery condition first.
Check any official Honda service website for more service information about the navigation system.
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 the combination light switch to the parking light position.

?3.
Check if the navigation switch panel buttons are illuminated.

Are the buttons illuminated?

     
YES
     
     
     
Intermittent failure, the navigation switch panel is OK at this time.?
     
NO
     
     
     
The failure is duplicated, go to step 2.
2.
Fuse check:

Fuse check
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Check the following fuse.
Fuse
No. B25 (10 A)
Location
Under-dash fuse/relay box

Is the fuse OK?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
Replace the fuse, and recheck. If the fuse blows again, check for a short in the No. B25 (10 A) fuse circuit.?
3.
Determine possible failure area (interior lights circuit, others):

Determine possible failure area (interior lights circuit, others)
?1.
Check if several other buttons that are not related to the audio system are illuminated.

Are the buttons illuminated?

     
YES
     
     
     
Go to step 4.
     
NO
     
     
     
Troubleshoot the interior lights.?
4.
Open wire check (ILLUMI+ line):

Open wire check (ILLUMI+ line)
?1.
Measure the voltage between test points 1 and 2.
Test condition
ON mode
Test circuit
ILLUMI+
Test point 1
Navigation switch panel 12P connector No. 7 (GRY)
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
The ILLUMI+ wire is OK. Go to step 5.
     
NO
     
     
     
Repair an open in the wire between the No. B25 (10 A) fuse in the under-dash fuse/relay box and the navigation switch panel.?
5.
Open wire check (ILL-(LED) line):

Open wire check (ILL-(LED) line)
?1.
Turn the combination light switch off.

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

?3.
Disconnect the following connectors.

?4.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
 
Navigation switch panel 12P connector: disconnected
 
Gauge control module connector A (32P): disconnected
Test circuit
ILL-(LED)
Test point 1
Navigation switch panel 12P connector No. 9 (TAN)
Test point 2
Gauge control module connector A (32P) No. 15 (TAN)


Is there continuity?

     
YES
     
     
     
     
NO
     
     
     
Repair an open in the wire(s) between the navigation switch panel and the gauge control module.?