DTC U0100-00, U0101-00, U0123-00, U0126-00, U0129-00, U0151-00, U0155-00 (VSA Control Unit)

DTC U0100-00 : CAN Communication Failure with ECM/ISU
DTC U0101-00 : CAN Communication Failure with PCM/TCM
DTC U0123-00 : CAN Communication Failure with Yaw-Rate/Acceleration Sensor
DTC U0126-00 : CAN Communication Failure with Absolute Steering Wheel Angle Sensor
DTC U0129-00 : CAN Communication Failure with AHB/ESB/EBB
DTC U0151-00 : CAN Communication Failure with SRS DTC U0155-00 : CAN Communication Failure with Meter

NOTE:

Before you troubleshoot, review the general troubleshooting information .
Refer to the DTC code shown on the display, and then inspect the connectors and terminals based on the instructions in the table.
These DTC (s) may be stored due to a power/ground circuit failure of the appropriate transmitting control unit. Before doing this troubleshooting, check the power/ground circuit of the appropriate transmitting control unit first.

DTC Description	DTC
U0100-00 CAN Communication Failure with ECM/ISU
U0101-00 CAN Communication Failure with PCM/TCM
U0123-00 CAN Communication Failure with Yaw-Rate/Acceleration Sensor
U0126-00 CAN Communication Failure with Absolute Steering Wheel Angle Sensor
U0129-00 CAN Communication Failure with AHB/ESB/EBB
U0151-00 CAN Communication Failure with SRS
U0155-00 CAN Communication Failure with Meter

DTC (VSA)

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

DTC (CAN gateway)

Is DTC indicated?

YES

Go to indicated DTC's 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 VSA modulator-control unit detect the CAN gateway Bus channels A and B?

Bus A is Not Available

Go to step 3.

Bus B is Not Available

Go to step 4.

Bus A and B are Available

Go to step 5.

Open wire check (F-CAN A_H, F-CAN A_L lines)

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

-2. Disconnect the following connectors.

CAN gateway 16P connector

VSA modulator-control unit 46P connector

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

Test condition	Vehicle OFF (LOCK) mode
	CAN gateway 16P connector: disconnected
	VSA modulator-control unit 46P connector: disconnected
Test point 1	CAN gateway 16P connector (female terminals) No. 3:
Test point 2	VSA modulator-control unit 46P connector No. 20

Test point 1	CAN gateway 16P connector (female terminals) No. 11:
Test point 2	VSA modulator-control unit 46P connector No. 21

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 loose terminals and poor connections in the VSA modulator-control unit connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or replace the VSA modulator-control unit .

Repair an open in the wire between the VSA modulator-control unit and the CAN gateway.

Open wire check (F-CAN B_H, F-CAN B_L lines)

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

-2. Disconnect the following connectors.

CAN gateway 16P connector

VSA modulator-control unit 46P connector

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

Test condition	Vehicle OFF (LOCK) mode
	CAN gateway 16P connector: disconnected
	VSA modulator-control unit 46P connector: disconnected
Test point 1	CAN gateway 16P connector (female terminals) No. 6:
Test point 2	VSA modulator-control unit 46P connector No. 24

Test point 1	CAN gateway 16P connector (female terminals) No. 14:
Test point 2	VSA modulator-control unit 46P connector No. 25

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

Is there continuity?

YES

The F-CAN B_H and F-CAN B_L wires are OK. Check for loose terminals and poor connections in the VSA modulator-control unit connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or replace the VSA modulator-control unit .

Repair an open in the wire between the VSA modulator-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.

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, C
U0101-00	PCM	A, C
U0123-00	SRS unit	B
U0126-00	EPS control unit	B
U0129-00	Electric servo brake control unit	A, B
U0151-00	SRS unit	B
U0155-00	Gauge control module	C

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 C

Go to step 8.

U0101-00: PCM is Not Available for Bus A

Go to step 6.

U0101-00: PCM is Not Available for Bus C

Go to step 8.

U0123-00: SRS unit is Not Available for Bus B

Go to step 7.

U0126-00: EPS control unit is Not Available for Bus B

Go to step 7.

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

Go to step 6.

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

Go to step 7.

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

Go to step 7.

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

Go to step 8.

Open wire check (F-CAN A_H, F-CAN A_L lines)

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

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	PCM connector A (50P)
U0129-00	Electric servo brake control unit 22P connector

NOTE:

Jump the SCS line with the HDS, and wait more than 1 minute when disconnecting the PCM connector.
Before disconnecting the electric servo brake control unit connector, open the driver's door and wait for 3 minutes without closing the driver's door.

-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 (female terminals):	No. 3	PCM connector A (50P)	No. 39
U0100-00	F-CAN A_L	CAN gateway 16P connector (female terminals):	No. 11	PCM connector A (50P)	No. 38
U0101-00	F-CAN A_H	CAN gateway 16P connector (female terminals):	No. 3	PCM connector A (50P)	No. 39
U0101-00	F-CAN A_L	CAN gateway 16P connector (female terminals):	No. 11	PCM connector A (50P)	No. 38

DTC	Circuit name	Test point 1 (Receiving control unit)		Test point 2 (Transmitting control unit)
DTC	Circuit name	Connector	Terminal	Connector	Terminal
U0129-00	F-CAN A_H	CAN gateway 16P connector (female terminals):	No. 3	Electric servo brake control unit 22P connector	No. 15
U0129-00	F-CAN A_L	CAN gateway 16P connector (female terminals):	No. 11	Electric servo brake control unit 22P connector	No. 14

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 any authorized service information related to the DTCs or symptoms you are troubleshooting. According to the detected DTC on the following table, substitute or replace the correspond control unit.

DTC	Transmitting Control Unit
U0100-00	PCM
U0101-00	PCM
U0129-00	Electric servo brake control unit

Repair an open in the wire between the transmitting control unit and the CAN gateway.

Open wire check (F-CAN B_H, F-CAN B_L lines)

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

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

DTC	Connector
-	CAN gateway 16P connector
U0123-00	SRS unit connector A (39P)
U0126-00	EPS control unit connector B (6P)
U0129-00	Electric servo brake control unit 22P connector
U0151-00	SRS unit connector A (39P)

NOTE:

Before disconnecting the SRS unit connector, do the 12 volt battery terminal disconnection procedure and wait for at least 3 minutes.
Before disconnecting the electric servo brake control unit connector, open the driver's door and wait for 3 minutes without closing the driver's door.

-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
U0123-00	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	SRS unit connector A (39P)	No. 34
U0123-00	F-CAN B_L	CAN gateway 16P connector (female terminals):	No. 14	SRS unit connector A (39P)	No. 35
U0126-00	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	EPS control unit connector B (6P)	No. 3
U0126-00	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
U0129-00	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	Electric servo brake control unit 22P connector	No. 19
U0129-00	F-CAN B_L	CAN gateway 16P connector (female terminals):	No. 14	Electric servo brake control unit 22P connector	No. 18
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 continuity?

YES

The F-CAN B_H and F-CAN B_L wires are OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. According to the detected DTC on the following table, substitute or replace the correspond control unit.

DTC	Transmitting Control Unit
U0123-00	SRS unit
U0126-00	EPS control unit
U0129-00	Electric servo brake control unit
U0151-00	SRS unit

Repair an open in the wire between the transmitting control unit and the CAN gateway.

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

-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	PCM connector A (50P)
U0155-00	Gauge control module connector A (32P)

NOTE: Jump the SCS line with the HDS, and wait more than 1 minute when disconnecting the PCM connector.

-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 C_H	CAN gateway 16P connector (female terminals):	No. 5	PCM connector A (50P)	No. 37
U0100-00	F-CAN C_L	CAN gateway 16P connector (female terminals):	No. 13	PCM connector A (50P)	No. 36
U0101-00	F-CAN C_H	CAN gateway 16P connector (female terminals):	No. 5	PCM connector A (50P)	No. 37
U0101-00	F-CAN C_L	CAN gateway 16P connector (female terminals):	No. 13	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
U0155-00	F-CAN C_H	CAN gateway 16P connector (female terminals):	No. 5	Gauge control module connector A (32P)	No. 20
U0155-00	F-CAN C_L	CAN gateway 16P connector (female terminals):	No. 13	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 any authorized service information related to the DTCs or symptoms you are troubleshooting. According to the detected DTC on the following table, substitute or replace the correspond control unit.

DTC	Transmitting Control Unit
U0100-00	PCM
U0101-00	PCM
U0155-00	Gauge control module

Repair an open in the wire between the transmitting control unit and the CAN gateway.