DTC U0100-00, U0101-00, U0122-00, U0128-00, U0129-00, U0131-00, U0151-00, U0155-00

DTC U0100-00 : Lost Communication With The PCM (PGM-FI System)

DTC U0101-00 : Lost Communication With The PCM/TCM

DTC U0122-00 : Lost Communication With The VSA Modulator-Control Unit

DTC U0128-00 : Lost Communication With The Electric Parking Brake Control Unit

DTC U0129-00 : Lost Communication With The Electric Servo Brake Control Unit

DTC U0131-00 : Lost Communication With The EPS Control Unit

DTC U0151-00 : Lost Communication With The SRS Unit

DTC U0155-00 : Lost Communication With The Gauge Control Module

NOTE: Before you troubleshoot, review the general troubleshooting information .

DTC Description	DTC
U0100-00 Lost Communication With The PCM (PGM-FI System)
U0101-00 Lost Communication With The PCM/TCM
U0122-00 Lost Communication With The VSA Modulator-Control Unit
U0128-00 Lost Communication With The Electric Parking Brake Control Unit
U0129-00 Lost Communication With The Electric Servo Brake Control Unit
U0131-00 Lost Communication With The EPS Control Unit
U0151-00 Lost Communication With The SRS Unit
U0155-00 Lost Communication With The Gauge Control Module

DTC (IDAS)

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
U0056-00 CAN Gateway F-CAN ch C Bus Off
U3000-49 CAN Gateway Internal Failure

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

YES

Go to the indicated DTCs troubleshooting .

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

Does the multipurpose camera unit detect the CAN gateway Bus channel B and C?

Bus B is Not Available

Go to step 3

Bus C is not Available

Go to step 4.

Bus B and C is Available

Go to step 5.

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

Multipurpose camera unit 20P connector

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

Test condition	Vehicle OFF (LOCK) mode
	CAN gateway 16P connector: disconnected
	Multipurpose camera unit 20P connector: disconnected
Test point 1	CAN gateway 16P connector No. 6:
Test point 2	Multipurpose camera unit 20P connector No. 2

Test point 1	CAN gateway 16P connector No. 14:
Test point 2	Multipurpose camera unit 20P connector No. 13

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

Is there continuity?

YES

Check for loose terminals and poor connections at the CAN gateway and the multipurpose camera unit. If they are OK, replace the multipurpose camera unit .

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

Open wire check (F-CAN C_H line, F-CAN C_L line)

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

-2. Disconnect the following connectors.

CAN gateway 16P connector

Multipurpose camera unit 20P connector

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

Test condition	Vehicle OFF (LOCK) mode
	CAN gateway 16P connector: disconnected
	Multipurpose camera unit 20P connector: disconnected
Test point 1	CAN gateway 16P connector No. 5:
Test point 2	Multipurpose camera unit 20P connector No. 4

Test point 1	CAN gateway 16P connector No. 13:
Test point 2	Multipurpose camera unit 20P connector No. 15

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

Is there continuity?

YES

Check for loose terminals and poor connections at the CAN gateway and the multipurpose camera unit. If they are OK, replace the multipurpose camera unit .

Repair an open in the F-CAN C_H wire or the F-CAN C_L wire between the multipurpose camera 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.

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
U0100-00	PCM	A, B
U0101-00	PCM	A, B
U0122-00	VSA modulator-control unit	B, C
U0128-00	VSA modulator-control unit	B, C
U0129-00	Electric servo brake control unit	B, C
U0131-00	EPS control unit connector	C
U0151-00	SRS unit	C
U0155-00	Gauge control module	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 6.

U0100-00: PCM is Not Available for Bus B

Go to step 7.

U0101-00: PCM is Not Available for Bus A

Go to step 6.

U0101-00: PCM is Not Available for Bus B

Go to step 7.

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

Go to step 7.

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

Go to step 8.

U0128-00: VSA modulator-control unit is Not Available for Bus B

Go to step 7

U0128-00: VSA modulator-control unit is Not Available for Bus C

Go to step 8.

U0129-00: Electric servo brake control unit is Not Available for Bus B

Go to step 7.

U0129-00: Electric servo brake control unit is Not Available for Bus C

Go to step 8.

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

Go to step 8.

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

Go to step 8.

U0155-00: Gauge control module is Not Available for Bus B

Go to step 7.

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 (51P)
U0101-00	PCM connector A (51P)

-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
U0100-00	F-CAN A_H	CAN gateway 16P connector:	No. 3	PCM connector A (51P)	No. 37
U0100-00	F-CAN A_L	CAN gateway 16P connector:	No. 11	PCM connector A (51P)	No. 36
U0101-00	F-CAN A_H	CAN gateway 16P connector:	No. 3	PCM connector A (51P)	No. 37
U0101-00	F-CAN A_L	CAN gateway 16P connector:	No. 11	PCM connector A (51P)	No. 36

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

Is there continuity?

YES

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. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM , then recheck. If they are OK, replace the original PCM .
U0101-00	Check for poor connections or loose terminals at the CAN gateway and the PCM. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM , then recheck. If they are OK, replace the original PCM .

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 (51P)
U0101-00	PCM connector A (51P)
U0122-00	VSA modulator-control unit 46P connector
U0129-00	Electric servo brake control unit 22P connector
U0155-00	Gauge Control Module Connector A (32P)

-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
U0100-00	F-CAN B_H	CAN gateway 16P connector:	No. 6	PCM connector A (51P)	No. 39
U0100-00	F-CAN B_L	CAN gateway 16P connector:	No. 14	PCM connector A (51P)	No. 38
U0101-00	F-CAN B_H	CAN gateway 16P connector:	No. 6	PCM connector A (51P)	No. 39
U0101-00	F-CAN B_L	CAN gateway 16P connector:	No. 14	PCM connector A (51P)	No. 38
U0122-00	F-CAN B_H	CAN gateway 16P connector:	No. 6	VSA modulator-control unit 46P connector	No. 46
U0122-00	F-CAN B_L	CAN gateway 16P connector:	No. 14	VSA modulator-control unit 46P connector	No. 34
U0128-00	F-CAN B_H	CAN gateway 16P connector:	No. 6	VSA modulator-control unit 46P connector	No. 46
U0128-00	F-CAN B_L	CAN gateway 16P connector:	No. 14	VSA modulator-control unit 46P connector	No. 34
U0129-00	F-CAN B_H	CAN gateway 16P connector:	No. 6	Electric servo brake control unit 22P connector	No. 15
U0129-00	F-CAN B_L	CAN gateway 16P connector:	No. 14	Electric servo brake control unit 22P connector	No. 14
U0155-00	F-CAN B_H	CAN gateway 16P connector:	No. 6	Gauge control module connector A (32P)	No. 19
U0155-00	F-CAN B_L	CAN gateway 16P connector:	No. 14	Gauge control module connector A (32P)	No. 20

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 correspond control unit.

DTC	Operation for transmitting control unit
U0100-00	Check for poor connections or loose terminals at the CAN gateway and the Management ECU. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM , then recheck. If they are OK, replace the original PCM .
U0101-00	Check for poor connections or loose terminals at the CAN gateway and the Management ECU. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM , then recheck. If they are OK, replace the original PCM .
U0122-00	Check for poor connections or loose terminals at the CAN gateway and the VSA modulator-control unit. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the VSA modulator-control unit .
U0128-00	Check for poor connections or loose terminals at the CAN gateway and the VSA modulator-control unit. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the VSA modulator-control unit .
U0129-00	Check for poor connections or loose terminals at the CAN gateway and the electric servo brake control unit. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the electric servo brake control unit/pedal feel simulator .
U0155-00	Check for poor connections or loose terminals at the CAN gateway and the gauge control module. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good gauge control module , then recheck. If they are OK, replace the original gauge control module .

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.

Open wire check (F-CAN C_H line, F-CAN C_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
U0122-00	VSA modulator-control unit 46P connector
U0128-00	VSA modulator-control unit 46P connector
U0129-00	Electric servo brake control unit 22P connector
U0131-00	EPS control unit connector B (6P)
U0151-00	SRS unit connector A (39P)

-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
U0122-00	F-CAN C_H	CAN gateway 16P connector:	No. 5	VSA modulator-control unit 46P connector	No. 40
U0122-00	F-CAN C_L	CAN gateway 16P connector:	No. 13	VSA modulator-control unit 46P connector	No. 28
U0128-00	F-CAN C_H	CAN gateway 16P connector:	No. 5	VSA modulator-control unit 46P connector	No. 40
U0128-00	F-CAN C_L	CAN gateway 16P connector:	No. 13	VSA modulator-control unit 46P connector	No. 28
U0129-00	F-CAN C_H	CAN gateway 16P connector:	No. 5	Electric servo brake control unit 22P connector	No. 19
U0129-00	F-CAN C_L	CAN gateway 16P connector:	No. 13	Electric servo brake control unit 22P connector	No. 18
U0131-00	F-CAN C_H	CAN gateway 16P connector:	No. 5	EPS control unit connector B (6P)	No. 3
U0131-00	F-CAN C_L	CAN gateway 16P connector:	No. 13	EPS control unit connector B (6P)	No. 1
U0151-00	F-CAN C_H	CAN gateway 16P connector:	No. 5	SRS unit connector A (39P)	No. 34
U0151-00	F-CAN C_L	CAN gateway 16P connector:	No. 13	SRS unit connector A (39P)	No. 35

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

Is there continuity?

YES

The F-CAN C_H wire and the F-CAN C_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
U0122-00	Check for poor connections or loose terminals at the CAN gateway and the VSA modulator-control unit. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the VSA modulator-control unit .
U0128-00	Check for poor connections or loose terminals at the CAN gateway and the electric parking brake control unit. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good VSA modulator-control unit , then recheck. If they are OK, replace the original VSA modulator-control unit .
U0129-00	Check for poor connections or loose terminals at the CAN gateway and the electric servo brake control unit. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the electric servo brake control unit/pedal feel simulator .
U0131-00	Check for poor connections or loose terminals at the CAN gateway and the EPS control unit. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good EPS control unit , then recheck. If they are OK, replace the EPS control unit .
U0151-00	Check for poor connections or loose terminals at the CAN gateway and the SRS unit. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good SRS unit , then recheck. If they are OK, replace the SRS unit .

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