DTC U0100, U0101, U0104, U0122, U0128, U0131, U0132, U0151, U1288, U129C (Gauge Control Module (With ACC))

WARNING: This page is about a different car, the 2022 Honda Accord, 2021 Honda Accord, 2020 Honda Accord, 2019 Honda Accord, and 2018 Honda Accord. However, it is still accessible from the selected car via links, so may be relevant.

DTC U0100 : Gauge Control Module Lost Communication with ENG/AT
DTC U0101 : Gauge Control Module Lost Communication with AT
DTC U0104 : Gauge Control Module Lost Communication with Driving Support System Control Unit
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 U0132 : Gauge Control Module Lost Communication with Adaptive Damper Control Unit
DTC U0151 : Gauge Control Module Lost Communication with SRS Unit
DTC U1288 : Gauge Control Module Lost Communication with PARKSR
DTC U129C : Gauge Control Module Lost Communication with Multipurpose Camera Unit

NOTE:

If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .
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
U0100-00 Gauge control module lost communication with ENG/AT
U0101 Gauge control module lost communication with AT
U0104 Gauge control module lost communication with driving support system control unit
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
U0132 Gauge control module lost communication with adaptive damper control unit
U0151 Gauge control module lost communication with SRS unit
U1288 Gauge control module lost communication with PARKSR
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 as follows.

DTC Description	DTC
U0029-00 CAN Gateway F-CAN ch A Bus Off
U0038-00 CAN Gateway F-CAN ch E Bus Off
U0047-00 CAN Gateway F-CAN ch B Bus Off

DTC Description	DTC
U0065-00 CAN Gateway F-CAN ch D Bus Off
U3000-49 CAN Gateway Internal Failure

DTC (Can Gateway)

Is any of CAN gateway system DTC (s) indicated?

YES

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

Go to step 2.

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 Connection Check

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

Bus C is Not Available

Go to step 3.

Bus C is Available

Go to step 4.

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 (female terminals) No. 5:
Test point 2	Gauge control module connector A (32P) No. 20

Test point 1	CAN gateway 16P connector (female terminals) No. 13:
Test point 2	Gauge control module connector A (32P) No. 21

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

Is there continuity?

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 the indicated DTCs go away after substitution, 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 Connection Check

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 *1	PCM	A, D
U0100 2, 3	PCM	A, B
U0101 *1	TCM	A, D
U0101 *2	TCM	A
U0104 *1	Millimeter wave radar	E
U0104 2, 3	Millimeter wave radar	D
U0122	VSA modulator-control unit	A, B
U0128	VSA modulator-control unit	A, B
U0131	EPS control unit	B
U0132 *1	Adaptive damper control unit	A
U0132 *2	Adaptive damper control unit	B
U0151	SRS unit	B
U1288	Parking and back-up sensor control unit	B
U129C *1	Multipurpose camera unit	E
U129C 2, 3	Multipurpose camera unit	D

*1: A/T

*2: CVT

*3: M/T

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.

Any of control units are Not Available for Bus A

Go to step 5.

Any of control units are Not Available for Bus B

Go to step 6.

Any of control units are Not Available for Bus D

Go to step 7.

Any of control units are Not Available for Bus E

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 CAN gateway and transmitting control unit connectors.

DTC	Connector
-	CAN gateway 16P connector
U0100	PCM connector A (50P)
U0101 *1	TCM connector A (23P)
U0101 *2	TCM 50P connector
U0122 U0128	VSA modulator-control unit 46P connector
U0132 *1	Adaptive damper control unit 24P connector

*1: A/T

*2: CVT

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

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	F-CAN A_H	CAN gateway 16P connector (female terminals):	No. 3	PCM connector A (50P)	No. 37
U0100	F-CAN A_L	CAN gateway 16P connector (female terminals):	No. 11	PCM connector A (50P)	No. 36
U0101 *1	F-CAN A_H	CAN gateway 16P connector (female terminals):	No. 3	TCM connector A (23P)	No. 19
U0101 *1	F-CAN A_L	CAN gateway 16P connector (female terminals):	No. 11	TCM connector A (23P)	No. 18
U0101 *2	F-CAN A_H	CAN gateway 16P connector (female terminals):	No. 3	TCM 50P connector	No. 3
U0101 *2	F-CAN A_L	CAN gateway 16P connector (female terminals):	No. 11	TCM 50P connector	No. 11
U0122 U0128	F-CAN A_H	CAN gateway 16P connector (female terminals):	No. 3	VSA modulator-control unit 46P connector	No. 20
U0122 U0128	F-CAN A_L	CAN gateway 16P connector (female terminals):	No. 11	VSA modulator-control unit 46P connector	No. 21
U0132 *1	F-CAN A_H	CAN gateway 16P connector (female terminals):	No. 3	Adaptive damper control unit 24P connector	No. 19
U0132 *1	F-CAN A_L	CAN gateway 16P connector (female terminals):	No. 11	Adaptive damper control unit 24P connector	No. 20

*1: A/T

*2: CVT

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

Is there continuity?

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 control unit based on the instructions (see table).

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 (A/T , CVT ), then recheck. If DTC U0101 goes away after substitution, replace the original TCM (A/T , CVT ).
U0122 U0128	Replace the VSA modulator-control unit .

DTC	Operation for transmitting control unit
U0132	Substitute a known-good adaptive damper control unit , then recheck. If DTC U0132 goes away after substitution, replace the original adaptive damper 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 CAN gateway and transmitting control unit connectors.

DTC	Connector
-	CAN gateway 16P connector
U0100 1, 2	PCM connector A (50P)
U0122 U0128	VSA modulator-control unit 46P connector
U0131	EPS control unit connector B (6P)
U0132 *1	Adaptive damper control unit 24P connector
U0151	SRS unit connector A (43P)
U1288	Parking and back-up sensor control unit 24P connector

*1: CVT

*2: M/T

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

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, 2	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	PCM connector A (50P)	No. 39
U0100 1, 2	F-CAN B_L	CAN gateway 16P connector (female terminals):	No. 14	PCM connector A (50P)	No. 38
U0122 U0128	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	VSA modulator-control unit 46P connector	No. 24
U0122 U0128	F-CAN B_L	CAN gateway 16P connector (female terminals):	No. 14	VSA modulator-control unit 46P connector	No. 25
U0131	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	EPS control unit connector B (6P)	No. 4
U0131	F-CAN B_L	CAN gateway 16P connector (female terminals):	No. 14	EPS control unit connector B (6P)	No. 1
U0132 *1	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	Adaptive damper control unit 24P connector	No. 19
U0132 *1	F-CAN B_L	CAN gateway 16P connector (female terminals):	No. 14	Adaptive damper control unit 24P connector	No. 20
U0151	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	SRS unit connector A (43P)	No. 16
U0151	F-CAN B_L	CAN gateway 16P connector (female terminals):	No. 14	SRS unit connector A (43P)	No. 17
U1288	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	Parking and back-up sensor control unit 24P connector	No. 22
U1288	F-CAN B_L	CAN gateway 16P connector (female terminals):	No. 14	Parking and back-up sensor control unit 24P connector	No. 10

*1: CVT

*2: M/T

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

Is there continuity?

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 control unit based on the instructions (see table).

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	Replace the EPS control unit (steering gearbox assembly) .
U0132	Substitute a known-good adaptive damper control unit , then recheck. If DTC U0132 goes away after substitution, replace the original adaptive damper control unit .
U0151	Substitute a known-good SRS unit , then recheck. If DTC U0151 goes away after substitution, replace the original SRS unit .
U1288	Substitute a known-good parking and back-up sensor control unit , then recheck. If DTC U1288 goes away after substitution, replace the parking and back-up sensor control unit .

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

Open wire check (F-CAN D 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 CAN gateway and transmitting control unit connectors.

DTC	Connector
-	CAN gateway 16P connector
U0100 *1	PCM connector A (50P)
U0101 *1	TCM connector A (23P)
U0104 *2	Millimeter wave radar 8P connector
U129C *2	Multipurpose camera unit 12P connector

*1: A/T

*2: CVT, M/T

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

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 D_H	CAN gateway 16P connector (female terminals):	No. 7	PCM connector A (50P)	No. 39
U0100 *1	F-CAN D_L	CAN gateway 16P connector (female terminals):	No. 15	PCM connector A (50P)	No. 38
U0101 *1	F-CAN D_H	CAN gateway 16P connector (female terminals):	No. 7	TCM connector A (23P)	No. 13
U0101 *1	F-CAN D_L	CAN gateway 16P connector (female terminals):	No. 15	TCM connector A (23P)	No. 12
U0104 *2	F-CAN D_H	CAN gateway 16P connector (female terminals):	No. 7	Millimeter wave radar 8P connector	No. 7
U0104 *2	F-CAN D_L	CAN gateway 16P connector (female terminals):	No. 15	Millimeter wave radar 8P connector	No. 6
U129C *2	F-CAN D_H	CAN gateway 16P connector (female terminals):	No. 7	Multipurpose camera unit 12P connector	No. 11
U129C *2	F-CAN D_L	CAN gateway 16P connector (female terminals):	No. 15	Multipurpose camera unit 12P connector	No. 5

*1: A/T

*2: CVT, M/T

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

Is there continuity?

YES

The F-CAN D_H wire and the F-CAN D_L wire are OK.

According to the detected DTC on the following table, substitute or replace the control unit based on the instructions (see table).

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 .
U0104	Substitute a known-good millimeter wave radar , then recheck. If DTC U0104 goes away after substitution, replace the original millimeter wave radar .
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 D_H or F-CAN D_L wire between the CAN gateway and the transmitting control unit.

Open wire check (F-CAN E lines)

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

-2. According to the detected DTC on the following table, disconnect the CAN gateway and transmitting control unit connectors.

DTC	Connector
-	CAN gateway 16P connector
U0104 *	Millimeter wave radar 8P connector
U129C *	Multipurpose camera unit 12P connector

*: A/T

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

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
U0104 *	F-CAN E_H	CAN gateway 16P connector (female terminals):	No. 16	Millimeter wave radar 8P connector	No. 7
U0104 *	F-CAN E_L	CAN gateway 16P connector (female terminals):	No. 8	Millimeter wave radar 8P connector	No. 6
U129C *	F-CAN E_H	CAN gateway 16P connector (female terminals):	No. 16	Multipurpose camera unit 12P connector	No. 11
U129C *	F-CAN E_L	CAN gateway 16P connector (female terminals):	No. 8	Multipurpose camera unit 12P connector	No. 5

*: A/T

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

Is there continuity?

YES

The F-CAN E_H wire and the F-CAN E_L wire are OK.

According to the detected DTC on the following table, substitute or replace the control unit based on the instructions (see table).

DTC	Operation for transmitting control unit
U0104	Substitute a known-good millimeter wave radar , then recheck. If DTC U0104 goes away after substitution, replace the original millimeter wave radar .
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 E_H or F-CAN E_L wire between the CAN gateway and the transmitting control unit.