DTC U0100, U0101, U0122, U0128, U0131, U0151, U129C (Gauge Control Module with CAN gateway)

DTC U0100 : Gauge Control Module Lost Communication with ENG/AT

DTC U0101 : Gauge Control Module Lost Communication with AT

DTC U0122 : Gauge Control Module Lost Communication with VSA Modulator-Control Unit

DTC U0128 : Gauge Control Module Lost Communication with EPB

DTC U0131 : Gauge Control Module Lost Communication with EPS Unit

DTC U0151 : Gauge Control Module Lost Communication with SRS Unit

DTC U129C : Gauge Control Module Lost Communication with Multipurpose Camera Unit

NOTE:

Before you troubleshoot, review the general troubleshooting information .
According to the detected DTC(s), check for the power circuit and the ground circuit of the control unit which cannot communicate with the gauge control module.
Refer to the DTC shown on the display, then inspect the connectors and terminals based on the instructions.

DTC Description	DTC
U0100 Gauge Control Module Lost Communication with ENG/AT
U0101 Gauge Control Module Lost Communication with AT
U0122 Gauge Control Module Lost Communication with VSA Modulator-Control Unit
U0128 Gauge Control Module Lost Communication with EPB
U0131 Gauge Control Module Lost Communication with EPS Unit
U0151 Gauge Control Module Lost Communication with SRS Unit
U129C Gauge Control Module Lost Communication with Multipurpose Camera Unit

DTC (Gauge Control Module)

CAN gateway system DTC check

-1. Check for CAN gateway system DTCs with the HDS.

DTC Description	DTC
U0029-00 CAN Gateway F-CAN ch A Bus Off
U0047-00 CAN Gateway F-CAN ch B Bus Off
U0056-00 CAN Gateway F-CAN ch C Bus Off
U3000-49 CAN Gateway Internal Failure

DTC (CAN GATEWAY)

Is DTC U0029-00, U0047-00, U0056-00, and/or U3000-49 indicated?

YES

Go to the troubleshooting for CAN gateway system DTC(s) .

NO: CAN gateway 12P connector type

Go to step 2.

NO: CAN gateway 16P connector type

Go to step 4.

F-CAN circuit communication check
-1. Select the FUNCTION TEST in the CAN gateway with the HDS, then select the F-CAN Bus Connected Unit Check.

F-CAN Bus Connected Unit Check

Does the gauge control module detect the CAN gateway Bus channels A?

Bus A is Not Available

Go to step 3.

Bus A is Available

Go to step 6.

Open wire check (F-CAN A lines)

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

-2. Disconnect the following connectors.

CAN gateway 12P connector
Gauge control module connector A (32P)

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

Test condition	Vehicle OFF (LOCK) mode CAN gateway 12P connector: disconnected Gauge control module connector A (32P): disconnected
Test point 1	CAN gateway 12P connector No. 3
Test point 2	Gauge control module connector A (32P) No. 19

Test point 1	CAN gateway 12P connector No. 9
Test point 2	Gauge control module connector A (32P) No. 20

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

Is there 1.0 Ω or less?

YES

The F-CAN A_H and F-CAN A_L wires are OK. Check for poor connections or loose terminals at the CAN gateway and the gauge control module. Substitute a known-good gauge control module , then recheck. If indicated DTC goes away and the gauge control module was substituted, replace the original gauge control module .

Repair an open in F-CAN A_H or F-CAN A_L wire between the CAN gateway and the gauge control module.

F-CAN circuit communication check
-1. Select the FUNCTION TEST in the CAN gateway with the HDS, then select the F-CAN Bus Connected Unit Check.

F-CAN Bus Connected Unit Check

Does the gauge control module detect the CAN gateway Bus channels C?

Bus C is Not Available

Go to step 5.

Bus C is Available

Go to step 6.

Open wire check (F-CAN C lines)

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

-2. Disconnect the following connectors.

CAN gateway 16P connector
Gauge control module connector A (32P)

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

Test condition	Vehicle OFF (LOCK) mode CAN gateway 16P connector: disconnected Gauge control module connector A (32P): disconnected
Test point 1	CAN gateway 16P connector No. 5
Test point 2	Gauge control module connector A (32P) No. 19

Test point 1	CAN gateway 16P connector No. 13
Test point 2	Gauge control module connector A (32P) No. 20

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

Is there 1.0 Ω or less?

YES

The F-CAN C_H and F-CAN C_L wires are OK. Check for poor connections or loose terminals at the CAN gateway and the gauge control module. Substitute a known-good gauge control module , then recheck. If indicated DTC goes away and the gauge control module was substituted, replace the original gauge control module .

Repair an open in F-CAN C_H or F-CAN C_L wire between the CAN gateway and the gauge control module.

F-CAN circuit communication check (Transmitting control unit)

-1. Select the FUNCTION TEST in the CAN gateway with the HDS, then select the F-CAN Bus Connected Unit Check.

F-CAN Bus Connected Unit Check

-2. According to the detected DTC on the following table, make sure that the transmitting control unit detects the CAN gateway Bus channel(s) normally.

DTC	Transmitting control unit	Detected CAN gateway Bus channel(s) at normal
U0100	PCM	A, B
U0101	TCM	A
U0122 U0128	VSA modulator-control unit	A, B
U0131	EPS control unit	B
U0151	SRS unit	B

DTC	Transmitting control unit	Detected CAN gateway Bus channel(s) at normal
U129C	Multipurpose camera unit	B

Is it detected normally?

Detected normal

Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the transmitting control unit and the CAN gateway.

U0100: PCM is Not Available for Bus A

Go to step 7.

U0100: PCM is Not Available for Bus B

Go to step 8.

U0101: TCM is Not Available for Bus A

Go to step 7.

U0122, U0128: VSA modulator-control unit is Not Available for Bus A

Go to step 7.

U0122, U0128: VSA modulator-control unit is Not Available for Bus B

Go to step 8.

U0131: EPS control unit is Not Available for Bus B

Go to step 8.

U0151: SRS unit is Not Available for Bus B

Go to step 8.

U129C: Multipurpose camera unit is Not Available for Bus B

Go to step 8.

Open wire check (F-CAN A lines)

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

-2. U0100: Jump the SCS line with the HDS, and wait more than 1 minute.

SCS short

-3. According to the detected DTC on the following table, disconnect the transmitting control unit connector(s).

DTC	Connector
-	CAN gateway 12P connector 1 CAN gateway 16P connector 2
U0100	PCM connector A (50P) 3 PCM connector No. 2 (58P) 4
U0101	TCM 50P connector
U0122 U0128	VSA modulator-control unit 46P connector

*1: CAN gateway 12P connector type

*2: CAN gateway 16P connector type

*3: Except K20C1 engine

*4: K20C1 engine

-4. Check for continuity between test points 1 and 2.

CAN gateway 12P connector type

Test condition

Vehicle OFF (LOCK) mode
CAN gateway 12P connector: disconnected
Transmitting control unit connector(s) for indicated DTCs: disconnected

DTC	Circuit name	Test point 1 (Receiving control unit)		Test point 2 (Transmitting control unit)
DTC	Circuit name	Connector	Terminal	Connector	Terminal
U0100	F-CAN A_H	CAN gateway 12P connector	No. 3	PCM connector A (50P)	No. 37
U0100	F-CAN A_L	CAN gateway 12P connector	No. 9	PCM connector A (50P)	No. 36

DTC	Circuit name	Test point 1 (Receiving control unit)		Test point 2 (Transmitting control unit)
DTC	Circuit name	Connector	Terminal	Connector	Terminal
U0101	F-CAN A_H	CAN gateway 12P connector	No. 3	TCM 50P connector	No. 3
U0101	F-CAN A_L	CAN gateway 12P connector	No. 9	TCM 50P connector	No. 11
U0122 U0128	F-CAN A_H	CAN gateway 12P connector	No. 3	VSA modulator-control unit 46P connector	No. 20
U0122 U0128	F-CAN A_L	CAN gateway 12P connector	No. 9	VSA modulator-control unit 46P connector	No. 21

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

CAN gateway 16P connector type

Test condition

Vehicle OFF (LOCK) mode
CAN gateway 16P connector: disconnected
Transmitting control unit connector(s) for indicated DTCs: disconnected

DTC	Circuit name	Test point 1 (Receiving control unit)		Test point 2 (Transmitting control unit)
DTC	Circuit name	Connector	Terminal	Connector	Terminal
U0100 *1	F-CAN A_H	CAN gateway 16P connector	No. 3	PCM connector A (50P)	No. 37
U0100 *1	F-CAN A_L	CAN gateway 16P connector	No. 11	PCM connector A (50P)	No. 36
U0100 *2	F-CAN A_H	CAN gateway 16P connector	No. 3	PCM connector No. 2 (58P)	No. 15
U0100 *2	F-CAN A_L	CAN gateway 16P connector	No. 11	PCM connector No. 2 (58P)	No. 27
U0101	F-CAN A_H	CAN gateway 16P connector	No. 3	TCM 50P connector	No. 3
U0101	F-CAN A_L	CAN gateway 16P connector	No. 11	TCM 50P connector	No. 11
U0122 U0128	F-CAN A_H	CAN gateway 16P connector	No. 3	VSA modulator-control unit 46P connector	No. 20
U0122 U0128	F-CAN A_L	CAN gateway 16P connector	No. 11	VSA modulator-control unit 46P connector	No. 21

*1: Except K20C1 engine

*2: K20C1 engine

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

Is there 1.0 Ω or less?

YES

The F-CAN A_H wire and the F-CAN A_L wire are OK.

According to the detected DTC on the following table substitute or replace the correspond control unit.

DTC	Operation for transmitting control unit
U0100	Substitute a known-good PCM , then recheck. If DTC U0100 goes away after substitution, replace the original PCM .
U0101	Substitute a known-good TCM , then recheck. If DTC U0101 goes away after substitution, replace the original TCM .
U0122 U0128	Replace the VSA modulator-control unit .

Repair an open in F-CAN A_H or F-CAN A_L wire between the CAN gateway and the transmitting control unit.

Open wire check (F-CAN B lines)

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

-2. U0100: Jump the SCS line with the HDS, and wait more than 1 minute.

SCS short

U0151: Do the 12 volt battery terminal disconnection procedure , and wait for at least 3 minutes.

-3. According to the detected DTC on the following table, disconnect the transmitting control unit connector(s).

DTC	Connector
-	CAN gateway 12P connector 1 CAN gateway 16P connector 2
U0100	PCM connector A (50P) 3 PCM connector No. 2 (58P) 4
U0122 U0128	VSA modulator-control unit 46P connector
U0131	EPS control unit connector B (6P)
U0151	SRS unit connector A (39P)
U129C	Multipurpose camera unit 20P connector 5 Multipurpose camera unit 12P connector 6

*1: CAN gateway 12P connector type

*2: CAN gateway 16P connector type

*3: Except K20C1 engine

*4: K20C1 engine

*5: Multipurpose camera unit 20P connector type

*6: Multipurpose camera unit 12P connector type

-4. Check for continuity between test points 1 and 2.

CAN gateway 12P connector type

Test condition

Vehicle OFF (LOCK) mode
CAN gateway 12P connector: disconnected
Transmitting control unit connector(s) for indicated DTCs: disconnected

DTC	Circuit name	Test point 1 (Receiving control unit)		Test point 2 (Transmitting control unit)
DTC	Circuit name	Connector	Terminal	Connector	Terminal
U0100	F-CAN B_H	CAN gateway 12P connector	No. 12	PCM connector A (50P)	No. 39
U0100	F-CAN B_L	CAN gateway 12P connector	No. 5	PCM connector A (50P)	No. 38
U0122 U0128	F-CAN B_H	CAN gateway 12P connector	No. 12	VSA modulator-control unit 46P connector	No. 24
U0122 U0128	F-CAN B_L	CAN gateway 12P connector	No. 5	VSA modulator-control unit 46P connector	No. 25
U0131	F-CAN B_H	CAN gateway 12P connector	No. 12	EPS control unit connector B (6P)	No. 3
U0131	F-CAN B_L	CAN gateway 12P connector	No. 5	EPS control unit connector B (6P)	No. 1
U0151	F-CAN B_H	CAN gateway 12P connector	No. 12	SRS unit connector A (39P)	No. 34
U0151	F-CAN B_L	CAN gateway 12P connector	No. 5	SRS unit connector A (39P)	No. 35
U129C *1	F-CAN B_H	CAN gateway 12P connector	No. 12	Multipurpose camera unit 20P connector	No. 2
U129C *1	F-CAN B_L	CAN gateway 12P connector	No. 5	Multipurpose camera unit 20P connector	No. 13
U129C *2	F-CAN B_H	CAN gateway 12P connector	No. 12	Multipurpose camera unit 12P connector	No. 11
U129C *2	F-CAN B_L	CAN gateway 12P connector	No. 5	Multipurpose camera unit 12P connector	No. 5

*1: Multipurpose camera unit 20P connector type

*2: Multipurpose camera unit 12P connector type

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

CAN gateway 16P connector type

Test condition

Vehicle OFF (LOCK) mode
CAN gateway 16P connector: disconnected
Transmitting control unit connector(s) for indicated DTCs: disconnected

DTC	Circuit name	Test point 1 (Receiving control unit)		Test point 2 (Transmitting control unit)
DTC	Circuit name	Connector	Terminal	Connector	Terminal
U0100 *1	F-CAN B_H	CAN gateway 16P connector	No. 6	PCM connector A (50P)	No. 39
U0100 *1	F-CAN B_L	CAN gateway 16P connector	No. 14	PCM connector A (50P)	No. 38
U0100 *2	F-CAN B_H	CAN gateway 16P connector	No. 6	PCM connector No. 2 (58P)	No. 29
U0100 *2	F-CAN B_L	CAN gateway 16P connector	No. 14	PCM connector No. 2 (58P)	No. 17
U0122 U0128	F-CAN B_H	CAN gateway 16P connector	No. 6	VSA modulator-control unit 46P connector	No. 24
U0122 U0128	F-CAN B_L	CAN gateway 16P connector	No. 14	VSA modulator-control unit 46P connector	No. 25
U0131	F-CAN B_H	CAN gateway 16P connector	No. 6	EPS control unit connector B (6P)	No. 3
U0131	F-CAN B_L	CAN gateway 16P connector	No. 14	EPS control unit connector B (6P)	No. 1
U0151	F-CAN B_H	CAN gateway 16P connector	No. 6	SRS unit connector A (39P)	No. 34
U0151	F-CAN B_L	CAN gateway 16P connector	No. 14	SRS unit connector A (39P)	No. 35
U129C	F-CAN B_H	CAN gateway 16P connector	No. 6	Multipurpose camera unit 12P connector	No. 11
U129C	F-CAN B_L	CAN gateway 16P connector	No. 14	Multipurpose camera unit 12P connector	No. 5

*1: Except K20C1 engine

*2: K20C1 engine

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

Is there 1.0 Ω or less?

YES

The F-CAN B_H wire and the F-CAN B_L wire are OK.

According to the detected DTC on the following table substitute or replace the correspond control unit.

DTC	Operation for transmitting control unit
U0100	Substitute a known-good PCM , then recheck. If DTC U0100 goes away after substitution, replace the original PCM .
U0122 U0128	Replace the VSA modulator-control unit .
U0131	Substitute a known-good EPS control unit , then recheck. If DTC U0131 goes away after substitution, replace the original EPS control unit .
U0151	Substitute a known-good SRS unit , then recheck. If DTC U0151 goes away after substitution, replace the original SRS unit .

DTC	Operation for transmitting control unit
U129C	Substitute a known-good multipurpose camera unit , then recheck. If DTC U129C goes away after substitution, replace the original multipurpose camera unit .

Repair an open in F-CAN B_H or F-CAN B_L wire between the CAN gateway and the transmitting control unit.