DTC U0100-00 (41-01), U0101-00 (41-04), U0122-00 (41-02), U0131-00 (41-09), U0151-00 (41-08) (AWD (With CAN Gateway)) (2020 2021)

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

DTC U0100-00 : F-CAN Malfunction (Lost Communication with Powertrain Control Module (PCM))DTC U0101-00 : F-CAN Malfunction (Lost Communication with A/T Control System)DTC U0122-00 : F-CAN Malfunction (Lost Communication with VSA Modulator-Control Unit)DTC U0131-00 : F-CAN Malfunction (Lost Communication with EPS Control Unit)DTC U0151-00 : F-CAN Malfunction (Lost Communication with SRS 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 AWD control unit.
Before disconnecting the SRS unit connector, do the 12 volt battery terminal disconnection procedure , and wait for at least 3 minutes.

DTC Description	DTC	Freeze Frame
U0100-00 F-CAN Malfunction (Lost Communication with Powertrain Control Module (PCM))
U0101-00 F-CAN Malfunction (Lost Communication with A/T Control System)
U0122-00 F-CAN Malfunction (Lost Communication with VSA Modulator-Control Unit)
U0131-00 F-CAN Malfunction (Lost Communication with EPS control unit)
U0151-00 F-CAN Malfunction (Lost Communication with SRS unit)

DTC (Real Time AWD)

CAN gateway system DTC check

-1. Turn the vehicle to the ON mode.

-2. 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 DTC (s) .

Go to step 2.

F-CAN circuit communication check (Receiving 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

Which result is indicated?

Bus B is Not Available

Go to step 3.

Bus B is Available

Go to step 4.

Open wire check (F-CAN B H line, F-CAN B L line)

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

-2. Disconnect the following connectors.

CAN gateway 16P connector

Real time AWD control unit 24P connector

-3. Measure the resistance between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	CAN gateway 16P connector: disconnected
	Real time AWD control unit 24P connector: disconnected
Test point 1	CAN gateway 16P connector (female terminals) No. 6:
Test point 2	AWD control unit 24P connector No. 14

Test point 1	CAN gateway 16P connector (female terminals) No. 14:
Test point 2	AWD control unit 24P connector No. 24

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. Check for poor connections or loose terminals at the CAN gateway and the AWD control unit. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good real time AWD control unit , then recheck. If indicated DTC goes away and the AWD control unit was substituted, replace the original real time AWD control unit .

Repair an open in the F-CAN B H wire or the F-CAN B L wire between the AWD control unit and the CAN gateway.

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.

-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 getaway Bus channel (s) at normal
U0100-00	PCM	A, B
U0101-00	TCM	A
U0122-00	VSA modulator-control unit	A, B
U0131-00	EPS control unit	B
U0151-00	SRS 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.

U0100-00: PCM is Not Available for Bus A

Go to step 5.

U0100-00: PCM is Not Available for Bus B

Go to step 6.

U0101-00: TCM is Not Available for Bus A

Go to step 5.

U0122-00: VSA modulator-control unit is Not Available for Bus A

Go to step 5.

U0122-00: VSA modulator-control unit is Not Available for Bus B

Go to step 6.

U0131-00: EPS control unit is Not Available for Bus B

Go to step 6.

U0151-00: SRS unit is Not Available for Bus B

Go to step 6.

Open wire check (F-CAN A H line, F-CAN A L line)

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

-2. According to the detected DTC on the following table, disconnect the transmitting control unit connector (s).

DTC	Connector
-	CAN gateway 16P connector
U0100-00	PCM connector A (50P)
U0101-00	TCM 50P connector
U0122-00	VSA modulator-control unit 46P connector

NOTE: Before disconnecting the PCM and TCM connector, jump the SCS line with the HDS, and wait for more than 1 minute.

-3. Measure the resistance 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
U0100-00	F-CAN A H	CAN gateway 16P connector (female terminals):	No. 3	PCM connector A (50P)	No. 37
U0100-00	F-CAN A L	CAN gateway 16P connector (female terminals):	No. 11	PCM connector A (50P)	No. 36
U0101-00	F-CAN A H	CAN gateway 16P connector (female terminals):	No. 3	TCM 50P connector	No. 3
U0101-00	F-CAN A L	CAN gateway 16P connector (female terminals):	No. 11	TCM 50P connector	No. 11
U0122-00	F-CAN A H	CAN gateway 16P connector (female terminals):	No. 3	VSA modulator-control unit 46P connector	No. 40
U0122-00	F-CAN A L	CAN gateway 16P connector (female terminals):	No. 11	VSA modulator-control unit 46P connector	No. 28

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
U0100-00	Check for poor connections or loose terminals at the CAN gateway and the PCM. Substitute a known-good PCM , then recheck. If DTC U0100-00 goes away and the PCM was substituted, replace the original PCM .
U0101-00	Check for poor connections or loose terminals at the CAN gateway and the TCM. Substitute a known-good TCM , then recheck. If DTC U0101-00 goes away and the TCM was substituted, replace the original TCM .
U0122-00	Check for poor connections or loose terminals at the CAN gateway and the VSA modulator-control unit. Replace the VSA modulator-control unit .

Repair an open in the F-CAN A H wire or the F-CAN A L wire between the transmitting control unit and the CAN gateway.

Open wire check (F-CAN B H line, F-CAN B L line)

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

-2. According to the detected DTC on the following table, disconnect the transmitting control unit connector (s).

DTC	Connector
-	CAN gateway 16P connector
U0100-00	PCM connector A (50P)
U0122-00	VSA modulator-control unit 46P connector
U0131-00	EPS control unit connector B (6P)
U0151-00	SRS unit connector A (39P)

NOTE: Before disconnecting the PCM connector, jump the SCS line with the HDS, and wait for more than 1 minute.

-3. Measure the resistance 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
U0100-00	F-CAN B H	CAN gateway 16P connector (female terminals):	No. 6	PCM connector A (50P)	No. 39
U0100-00	F-CAN B L	CAN gateway 16P connector (female terminals):	No. 14	PCM connector A (50P)	No. 38
U0122-00	F-CAN B H	CAN gateway 16P connector (female terminals):	No. 6	VSA modulator-control unit 46P connector	No. 46
U0122-00	F-CAN B L	CAN gateway 16P connector (female terminals):	No. 14	VSA modulator-control unit 46P connector	No. 34
U0131-00	F-CAN B H	CAN gateway 16P connector (female terminals):	No. 6	EPS control unit connector B (6P)	No. 3
U0131-00	F-CAN B L	CAN gateway 16P connector (female terminals):	No. 14	EPS control unit connector B (6P)	No. 1

DTC	Circuit name	Test point 1 (Receiving control unit)		Test point 2 (Transmitting control unit)
DTC	Circuit name	Connector	Terminal	Connector	Terminal
U0151-00	F-CAN B H	CAN gateway 16P connector (female terminals):	No. 6	SRS unit connector A (39P)	No. 34
U0151-00	F-CAN B L	CAN gateway 16P connector (female terminals):	No. 14	SRS unit connector A (39P)	No. 35

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
U0100-00	Check for poor connections or loose terminals at the CAN gateway and the PCM. Substitute a known-good PCM , then recheck. If DTC U0100-00 goes away and the multipurpose camera unit was substituted, replace the original PCM .
U0122-00	Check for poor connections or loose terminals at the CAN gateway and the VSA modulator-control unit. Replace the VSA modulator-control unit .
U0131-00	Check for poor connections or loose terminals at the CAN gateway and the EPS control unit. Substitute the EPS control unit , then recheck. If DTC U0131-00 goes away and the EPS control unit was substituted, replace the original EPS control unit .
U0151-00	Check for poor connections or loose terminals at the CAN gateway and the SRS unit. Substitute the SRS unit , then recheck. If DTC U0151-00 goes away and the SRS unit was substituted, replace the original SRS unit .

Repair an open in the F-CAN B H wire or the F-CAN B L wire between the transmitting control unit and the CAN gateway.