DTC : U0100, U0101, U0104, U0114, U0122, U0127, U0131, U0151, U1100 (Gauge Control Module: 9-Speed A/T With CAN Gateway)

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 U0114 : Gauge Control Module Lost Communication with All Wheel Drive Control Module

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

DTC U0127 : Gauge Control Module Lost Communication with TPMS Control Unit

DTC U0131 : Gauge Control Module Lost Communication with EPS Unit

DTC U0151 : Gauge Control Module Lost Communication with SRS Unit

DTC U1100 : Gauge Control Module Lost Communication with Driving Support System Control Unit

NOTE:

Before you troubleshoot, review the general troubleshooting information. Go to: How to Troubleshoot the Body Electrical .
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
U0104 Gauge Control Module Lost Communication with Driving Support System Control Unit
U0114 Gauge Control Module Lost Communication with All Wheel Drive Control Module
U0122 Gauge Control Module Lost Communication with VSA Modulator-Control Unit
U0127 Gauge Control Module Lost Communication with TPMS Control Unit
U0131 Gauge Control Module Lost Communication with EPS Unit
U0151 Gauge Control Module Lost Communication with SRS Unit
U1100 Gauge Control Module Lost Communication with Driving Support System Control Unit

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
U3000-49 CAN Gateway Internal Failure

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

YES

Go to the troubleshooting for CAN gateway system Communication Systems DTC Troubleshooting Index .

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 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 4.

Open wire check (F-CAN A 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. 3: (1)
Test point 2	Gauge control module connector A (32P) No. 19 - Refer to: Gauge Control Module Connector for Inputs and Outputs (2016 2017 218) Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .

Test point 1	CAN gateway 16P connector (female terminals) No. 11: (1)
Test point 2	Gauge control module connector A (32P) No. 20 - Refer to: Gauge Control Module Connector for Inputs and Outputs (2016 2017 218) Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .

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

Is there continuity?

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.

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

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, B
U0104 U1100	Multipurpose Camera Unit	A
U0114	i-VTM Control Unit	B
U0122	VSA Modulator-Control Unit	A
U0127	Keyless Access/TPMS Control Unit	B
U0131	EPS Control Unit	A
U0151	SRS Unit	A

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 5.

U0100: PCM is Not Available for Bus B

Go to step 6.

U0101: TCM is Not Available for Bus A

Go to step 5.

U0101: TCM is Not Available for Bus B

Go to step 6.

U0104, U1100: Multipurpose camera unit is Not Available for Bus A

Go to step 5.

U0114: i-VTM control unit is Not Available for Bus B

Go to step 6.

U0122: VSA Modulator-Control Unit is Not Available for Bus A

Go to step 5.

U0127: Keyless access/TPMS control unit is Not Available for Bus B

Go to step 6.

U0131: EPS control unit is Not Available for Bus A

Go to step 5.

U0151: SRS unit is Not Available for Bus A

Go to step 5.

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

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 16P connector
U0100	PCM connector A (50P)
U0101	TCM 58P connector
U0104U1100	Multipurpose camera unit 20P connector
U0122U0128	VSA Modulator-Control Unit 38P connector
U0131	EPS control unit connector B (8P)
U0151	SRS unit connector A (39P)

- 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	Receiving control unit		Transmitting control unit
DTC	Circuit name	Connector	Terminal	Connector	Terminal
U0100	F-CAN A_H	CAN gateway 16P connector (female terminals): (1)	No. 3	PCM connector A (50P) - Refer to: PCM Connector for Inputs and Outputs (6-Speed A/T) (2016 2017 2018 2019 2020) or PCM Connector for Inputs and Outputs (9-Speed A/T) (2016 2017 2018) or PCM Connector for Inputs and Outputs (9-Speed A/T) (2019 2020 2021) .	No. 11
U0100	F-CAN A_L	CAN gateway 16P connector (female terminals): (1)	No. 11		No. 10
U0101	F-CAN A_H	CAN gateway 16P connector (female terminals): (1)	No. 3	TCM 58P connector - Refer to: A/T Control System Connector for Inputs and Outputs (9-Speed A/T) (2016 2017 2018) or A/T Control System Connector for Inputs and Outputs (9-Speed A/T) (2019) or A/T Control System Connector for Inputs and Outputs (9-Speed A/T) (2020 2021) . A/T Control System Connector for Inputs and Outputs (6-Speed A/T) (2016 2017 2018 2019 2020)	No. 34
U0101	F-CAN A_L	CAN gateway 16P connector (female terminals): (1)	No. 11		No. 47
U0104 U1100	F-CAN A_H	CAN gateway 16P connector (female terminals): (1)	No. 3	Multipurpose camera unit 20P connector - Refer to: Multipurpose Camera Unit Connector for Inputs and Outputs (2016 2017 2018) or Multipurpose Camera Unit Connector for Inputs and Outputs (2019 2020 2021) .	No. 2
U0104 U1100	F-CAN A_L	CAN gateway 16P connector (female terminals): (1)	No. 11		No. 13
U0122	F-CAN A_H	CAN gateway 16P connector (female terminals): (1)	No. 3	VSA Modulator-Control Unit 38P connector - Refer to: VSA Modulator-Control Unit Connector for Inputs and Outputs (2016 2017 2018) or VSA Modulator-Control Unit Connector for Inputs and Outputs (2019 2020 2021) .	No. 6
U0122	F-CAN A_L	CAN gateway 16P connector (female terminals): (1)	No. 11		No. 7
U0131	F-CAN A_H	CAN gateway 16P connector (female terminals): (1)	No. 3	EPS control unit connector B (6P) - Refer to: EPS Control Unit Connector for Inputs and Outputs (2016 2017 2018) or EPS Control Unit Connector for Inputs and Outputs (2019 2020 2021) .	No. 3
U0131	F-CAN A_L	CAN gateway 16P connector (female terminals): (1)	No. 11		No. 8
U0151	F-CAN A_H	CAN gateway 16P connector (female terminals): (1)	No. 3	SRS unit connector A (39P) - Refer to: SRS Unit Connector for Inputs and Outputs (2016) or SRS Unit Connector for Inputs and Outputs (2017 2018) or SRS Unit Connector for Inputs and Outputs (2019 2020 2021) .	No. 34
U0151	F-CAN A_L	CAN gateway 16P connector (female terminals): (1)	No. 11		No. 35

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 replace the correspond control unit.

DTC	Operation for Transmitting Control Unit
U0100	PCM - Refer to: PCM Removal and Installation (6-Speed A/T), ('16-'18 9-Speed A/T) or PCM Removal and Installation (9-Speed A/T) (2019 2020 2021)
U0101	TCM
U0104 U1100	Multipurpose Camera Unit
U0122	VSA Modulator-Control Unit .
U0131	EPS Control Unit
U0151	SRS unit - Refer to: SRS Unit Removal and Installation (2016) or SRS Unit Removal and Installation (2017 2018 2019 2020 2021) .

Repair an open in F-CAN A_H or F-CAN A_L wire.

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

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

DTC	Connector
-	CAN gateway 16P connector
U0100	PCM connector A (50P)
U0101	TCM 58P connector
U0114	i-VTM control unit 24P connector
U0127	Keyless access/TPMS control unit connector C (20P)

- 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	Receiving control unit		Transmitting control unit
DTC	Circuit name	Connector	Terminal	Connector	Terminal
U0100	F-CAN B_H	CAN gateway 16P connector (female terminals): (1)	No. 6	PCM connector A (50P) - Refer to: PCM Connector for Inputs and Outputs (6-Speed A/T) (2016 2017 2018 2019 2020) or PCM Connector for Inputs and Outputs (9-Speed A/T) (2016 2017 2018) or PCM Connector for Inputs and Outputs (9-Speed A/T) (2019 2020 2021) .	No. 13
U0100	F-CAN B_L	CAN gateway 16P connector (female terminals): (1)	No. 14		No. 12
U0101	F-CAN B_H	CAN gateway 16P connector (female terminals): (1)	No. 6	TCM 58P connector - Refer to: A/T Control System Connector for Inputs and Outputs (9-Speed A/T) (2016 2017 2018) or A/T Control System Connector for Inputs and Outputs (9-Speed A/T) (2019) or A/T Control System Connector for Inputs and Outputs (9-Speed A/T) (2020 2021) . A/T Control System Connector for Inputs and Outputs (6-Speed A/T) (2016 2017 2018 2019 2020)	No. 7
U0101	F-CAN B_L	CAN gateway 16P connector (female terminals): (1)	No. 14		No. 20
U0114	F-CAN B_H	CAN gateway 16P connector (female terminals): (1)	No. 6	i-VTM control unit 24P connector - Refer to: i-VTM Control Unit Connector for Inputs and Outputs (AWD) (2016 2017 2018) or i-VTM Control Unit Connector for Inputs and Outputs (AWD) (2019 2020 2019) .	No. 14
U0114	F-CAN B_L	CAN gateway 16P connector (female terminals): (1)	No. 14		No. 24
U0122	F-CAN B_H	CAN gateway 16P connector (female terminals): (1)	No. 6	Keyless access/TPMS control unit connector C (20P) - Refer to: Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2016 2017 2018) or Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2019 2020 2021)	No. 2
U0122	F-CAN B_L	CAN gateway 16P connector (female terminals): (1)	No. 14		No. 12

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 replace the correspond control unit.

DTC	Operation for Transmitting Control Unit
U0100	PCM - Refer to: PCM Removal and Installation (6-Speed A/T), ('16-'18 9-Speed A/T) or PCM Removal and Installation (9-Speed A/T) (2019 2020 2021)
U0101	TCM
U0114	i-VTM control unit
U0127	Keyless access/TPMS control unit

Repair an open in F-CAN B_H or F-CAN B_L wire.