Audio-Navigation System DTC Troubleshooting: 2601
DTC 2601: Display Diag: Connect
NOTE:
Check the vehicle battery condition first.
This navigation DTC sets when a mechanical malfunction in the multi-information display unit is detected (the Display icon is red in the System Link).
Before you troubleshoot, make sure to follow the General Troubleshooting Information.
Check any official Honda service website for more service information about the navigation system.
1.
Problem verification:

Problem verification
?1.
Clear the hard error codes.

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

?3.
Check for hard error codes.

Is DTC 2601 indicated?

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

Determine possible failure area (multi-information display unit, others)
?1.
Go into the System Diagnostic Mode.

Is the Display icon red?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
Intermittent failure, the system is OK at this time.?
3.
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
 
Multi-information display unit connector A (12P): disconnected
Test circuit
GA BUS+
Test point 1
Audio-navigation unit connector D (12P) No. 7 (BRN)
Test point 2
Multi-information display unit connector A (12P) No. 1 (BRN)

Test circuit
GA BUS?
Test point 1
Audio-navigation unit connector D (12P) No. 1 (YEL)
Test point 2
Multi-information display unit connector A (12P) No. 2 (YEL)


Is there continuity?

     
YES
     
     
     
Go to step 4.
     
NO
     
     
     
Repair an open in the wire(s) between the audio-navigation unit and the multi-information display unit.?
4.
Shorted wire check (GA BUS+ line, GA BUS? line):

Shorted wire check (GA BUS+ line, GA BUS? line)
?1.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
 
Audio-navigation unit connector D (12P): disconnected
 
Multi-information display unit connector A (12P): disconnected
 
Tuner unit connector A (12P): disconnected
 
HandsFreeLink control unit connector A ( 32P): disconnected
 
XM receiver connector A (14P) (with XM): disconnected
Test circuit
GA BUS+
Test point 1
Multi-information display unit connector A (12P) No. 1 (BRN)
Test point 2
Body ground

Test circuit
GA BUS?
Test point 1
Multi-information display unit connector A (12P) No. 2 (YEL)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
There is a short to body ground in the GA BUS wire(s). Replace the affected shielded harness.?
     
NO
     
     
     
The GA BUS+ and the GA BUS? wires are not shorted to ground. Go to step 5.
5.
Shorted wire check (GA BUS+ line to GA BUS? line):

Shorted wire check (GA BUS+ line to GA BUS? line)
?1.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
 
Audio-navigation unit connector D (12P): disconnected
 
Multi-information display unit connector A (12P): disconnected
 
Tuner unit connector A (12P): disconnected
 
HandsFreeLink control unit connector A ( 32P): disconnected
 
XM receiver connector A (14P) (with XM): disconnected
Test circuit
GA BUS+, GA BUS?
Test point 1
Multi-information display unit connector A (12P) No. 1 (BRN)
Test point 2
Multi-information display unit connector A (12P) No. 2 (YEL)


Is there continuity?

     
YES
     
     
     
There is a short in the GA BUS wires. Replace the affected shielded harness.?
     
NO
     
     
     
The GA BUS+ and the GA BUS? wires are not shorted. Go to step 6.
6.
Shorted wire check (SH GA BUS line to another lines):

Shorted wire check (SH GA BUS line to another lines)
?1.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
 
Audio-navigation unit connector D (12P): disconnected
 
Multi-information display unit connector A (12P): disconnected
 
Tuner unit connector A (12P): disconnected
 
HandsFreeLink control unit connector A ( 32P): disconnected
 
XM receiver connector A (14P) (with XM): disconnected
Test circuit
SH GA BUS, GA BUS+
Test point 1
Multi-information display unit connector A (12P) No. 7 (GRY)
Test point 2
Multi-information display unit connector A (12P) No. 1 (BRN)

Test circuit
SH GA BUS, GA BUS?
Test point 1
Multi-information display unit connector A (12P) No. 7 (GRY)
Test point 2
Multi-information display unit connector A (12P) No. 2 (YEL)


Is there continuity?

     
YES
     
     
     
There is a short in the GA BUS wires. Replace the affected shielded harness.?
     
NO
     
     
     
The SH GA BUS wire is OK. Go to step 7.
7.
Open wire check (GA BUS+ line, GA BUS? line):

Open wire check (GA BUS+ line, GA BUS? line)
?1.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
 
Audio-navigation unit connector D (12P): disconnected
 
Multi-information display unit connector A (12P): disconnected
 
HandsFreeLink control unit connector A ( 32P): disconnected
 
XM receiver connector A (14P) (with XM): disconnected
Test circuit
GA BUS+
Test point 1
Audio-navigation unit connector D (12P) No. 7 (BRN)
Test point 2
Multi-information display unit connector A (12P) No. 1 (BRN)

Test circuit
GA BUS?
Test point 1
Audio-navigation unit connector D (12P) No. 1 (YEL)
Test point 2
Multi-information display unit connector A (12P) No. 2 (YEL)


Is there continuity?

     
YES
     
     
     
     
NO
     
     
     
Repair an open in the wire(s) between the audio-navigation unit and the multi-information display unit.?