DTC 2601: Display Diag: Connect (2014-15)

NOTE: 

• First, check the Vehicle 12 volt battery condition .
• 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 - Refer to: How to Troubleshoot the Navigation System (2014-15) .
• Check any official Honda service website for more service information about the navigation system.

1. Problem verification

   -1. Clear the hard error codes.

   - 2. Turn the vehicle to the OFF (LOCK) mode, and then back to 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)

   -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)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Disconnect the following connectors.

   Audio-navigation unit connector D (12P) - Refer to: Audio-Navigation Unit Removal and Installation (2014-15)

   Multi-information display unit connector A (12P)

   - 3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) 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)

   Courtesy of HONDA, U.S.A., INC.

   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)

   -1. Disconnect the following connectors.

   Tuner unit connector A (12P)

   HandsFreeLink control unit connector A (32P)

   - 2. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) 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
   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

   Courtesy of HONDA, U.S.A., INC.

   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)

   -1. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) 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
   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)

   Courtesy of HONDA, U.S.A., INC.

   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)

   -1. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) 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
   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)

   Courtesy of HONDA, U.S.A., INC.

   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)

   -1. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) 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 (36P): 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)

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Replace the multi-information display unit .

   NO 

   Repair an open in the wire (s) between the audio-navigation unit and the multi-information display unit.