DTC 2601: Display Diag: Connect

WARNING: This page is about a different variant/trim than selected.

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 - Refer to: How to Troubleshoot the Navigation System, or How to Troubleshoot the Navigation System (Display Audio) (2016-17) .
Check any official Honda service website for more service information about the navigation system.

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.
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.

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.

Audio-navigation unit connector D (12P) - Refer to: Audio-Navigation Unit Removal and Installation, or Audio-Navigation Unit Removal and Installation (Display Audio) (2016-17)

Multi-information display unit connector A (12P)

- 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)

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

Is there continuity?

YES

Go to step 4.

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

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

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.

The GA BUS+ and the GA BUS- wires are not shorted to ground. Go to step 5.

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)

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.

The GA BUS+ and the GA BUS- wires are not shorted. Go to step 6.

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)

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.

The SH GA BUS wire is OK. Go to step 7.

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)

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

Is there continuity?

YES

Replace the multi-information display unit .

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