DTC U0100-00, U0101-00, U0104-00, U0126-00, U0129-00, U0151-00, U0155-00 (VSA Control Unit (With CAN Gateway))

DTC U0100-00 : CAN Communication Failure with ECM/ISU DTC U0101-00 : CAN Communication Failure with PCM/TCM DTC U0104-00 : CAN Communication Failure with Driving Support System Control Unit 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 .
According to the detected DTC (s), check for the power circuit and the ground circuit of the control unit which cannot communicate with the VSA modulator-control unit.

*1: CAN gateway 12P connector type

*2: CAN gateway 16P connector type

DTC Description	DTC
U0100-00 CAN Communication Failure with ECM/ISU
U0101-00 CAN Communication Failure with PCM/TCM
U0104-00 CAN Communication Failure with Driving Support System Control Unit
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)

DTC check (VSA modulator-control unit)

-1. Turn the vehicle to the ON mode.

-2. Clear the DTC with the HDS.

-3. Turn the vehicle to the OFF (LOCK) mode, then start the engine.

-4. Test-drive the vehicle at 6 mph (10 km/h) or more.

NOTE: Drive the vehicle on the road, not on a lift.

-5. Check for DTCs with the HDS.

DTC Description	DTC
U0100-00 CAN Communication Failure with ECM/ISU
U0101-00 CAN Communication Failure with PCM/TCM
U0104-00 CAN Communication Failure with Driving Support System Control Unit

DTC Description	DTC
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

Is DTC indicated?

YES

Go to step 2.

Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting .

DTC check (CAN gateway system)

-1. Check for CAN gateway system DTCs with the HDS.

DTC Description	DTC

Are DTC (s) indicated?

YES

Go to indicated DTC's troubleshooting.

Go to step 3.

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?

VSA modulator-control unit (Bus A) is Not Available

Go to step 4.

VSA modulator-control unit (Bus B) is Not Available

Go to step 5.

VSA modulator-control unit (Bus A and B) is Available

Go to step 6.

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.

VSA modulator-control unit 46P connector

CAN gateway 12P connector *1

CAN gateway 16P connector *2

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

Test condition	Vehicle OFF (LOCK) mode
	VSA modulator-control unit 46P connector: disconnected
	CAN gateway 12P connector *1: disconnected
	CAN gateway 16P connector *2: disconnected

Test circuit 1
Test point 1	VSA modulator-control unit 46P connector No. 40
Test point 2	CAN gateway 12P connector *1 (female terminals) No. 3:
	CAN gateway 16P connector *2 (female terminals) No. 3:

Test circuit 2
Test point 1	VSA modulator-control unit 46P connector No. 28
Test point 2	CAN gateway 12P connector *1 (female terminals) No. 9:
	CAN gateway 16P connector *2 (female terminals) No. 11:

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

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

Is there 1.0 Ω or less?

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 46P connector. 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 .

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.

VSA modulator-control unit 46P connector

CAN gateway 12P connector *1

CAN gateway 16P connector *2

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

Test condition	Vehicle OFF (LOCK) mode
	VSA modulator-control unit 46P connector: disconnected
	CAN gateway 12P connector *1: disconnected
	CAN gateway 16P connector *2: disconnected
Test circuit 1
Test point 1	VSA modulator-control unit 46P connector No. 46
Test point 2	CAN gateway 12P connector *1 (female terminals) No. 12:
	CAN gateway 16P connector *2 (female terminals) No. 6:

Test circuit 2

Test point 1	VSA modulator-control unit 46P connector No. 34
Test point 2	CAN gateway 12P connector *1 (female terminals) No. 5:
	CAN gateway 16P connector *2 (female terminals) No. 14:

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

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

Is there 1.0 Ω or less?

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 46P connector. 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 .

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, B
U0101-00	TCM	A
U0104-00	Millimeter wave radar	B
U0126-00	EPS control unit	B
U0129-00	Electric brake booster	A, B
U0151-00	SRS unit	B
U0155-00	Gauge control module	A

Is it detected normally?

Detected normal

Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting .

U0100-00: PCM (Bus A) is Not Available

Go to step 7.

U0100-00: PCM (Bus B) is Not Available

Go to step 8.

U0101-00: TCM (Bus A) is Not Available

Go to step 7.

U0104-00: Millimeter wave radar (Bus B) is Not Available

Go to step 8.

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

Go to step 8.

U0129-00: Electric brake booster (Bus A) is Not Available

Go to step 7.

U0129-00: Electric brake booster (Bus B) is Not Available

Go to step 8.

U0151-00: SRS unit (Bus B) is Not Available

Go to step 8.

U0155-00: Gauge control module (Bus A) is Not Available

Go to step 7.

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 according to the detected DTC.

DTC	Connector
	CAN gateway 12P connector 1 CAN gateway 16P connector 2
U0100-00	PCM connector A (50P)
U0101-00	TCM 50P connector
U0129-00	Electric brake booster 26P connector
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. Measure the resistance between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Transmitting control unit connector (s) for indicated DTCs: disconnected
	CAN gateway 12P connector *1: disconnected
	CAN gateway 16P connector *2: 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 12P connector *1 (female terminals):	No. 3	PCM connector A (50P)	No. 37
	F-CAN A L	CAN gateway 12P connector *1 (female terminals):	No. 9		No. 36
	F-CAN A H	CAN gateway 16P connector *2 (female terminals):	No. 3		No. 37
	F-CAN A L	CAN gateway 16P connector *2 (female terminals):	No. 11		No. 36

DTC	Circuit name	Test point 1 (Receiving control unit)		Test point 2 (Transmitting control unit)
DTC	Circuit name	Connector	Terminal	Connector	Terminal
U0101-00	F-CAN A H	CAN gateway 12P connector *1 (female terminals):	No. 3	TCM 50P connector	No. 3
	F-CAN A L	CAN gateway 12P connector *1 (female terminals):	No. 9		No. 11
	F-CAN A H	CAN gateway 16P connector *2 (female terminals):	No. 3		No. 3
	F-CAN A L	CAN gateway 16P connector *2 (female terminals):	No. 11		No. 11
U0129-00	F-CAN A H	CAN gateway 12P connector *1 (female terminals):	No. 3	Electric brake booster 26P connector	No. 26
	F-CAN A L	CAN gateway 12P connector *1 (female terminals):	No. 9		No. 18
	F-CAN A H	CAN gateway 16P connector *2 (female terminals):	No. 3		No. 26
	F-CAN A L	CAN gateway 16P connector *2 (female terminals):	No. 11		No. 18
U0155-00	F-CAN A H	CAN gateway 12P connector *1 (female terminals):	No. 3	Gauge control module connector A (32P)	No. 19
	F-CAN A L	CAN gateway 12P connector *1 (female terminals):	No. 9		No. 20
	F-CAN A H	CAN gateway 16P connector *2 (female terminals):	No. 3		No. 19
	F-CAN A L	CAN gateway 16P connector *2 (female terminals):	No. 11		No. 20

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

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

Is there 1.0 Ω or less?

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, replace the correspond control unit.

DTC	Transmitting Control Unit
U0100-00	PCM
U0101-00	TCM
U0129-00	Electric brake booster
U0155-00	Gauge control module

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

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 according to the detected DTC.

DTC	Connector
	CAN gateway 12P connector 1 CAN gateway 16P connector 2
U0100-00	PCM connector A (50P)
U0104-00	Millimeter wave radar 8P connector
U0126-00	EPS control unit connector B (6P)
U0129-00	Electric brake booster 26P connector
U0151-00	SRS unit connector A (39P)

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

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

Test condition	Vehicle OFF (LOCK) mode
	Transmitting control unit connector (s) for indicated DTCs: disconnected
	CAN gateway 12P connector *1: disconnected
	CAN gateway 16P connector *2: 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 12P connector *1 (female terminals):	No. 12	PCM connector A (50P)	No. 39
	F-CAN B L	CAN gateway 12P connector *1 (female terminals):	No. 5		No. 38
	F-CAN B H	CAN gateway 16P connector *2 (female terminals):	No. 6		No. 39
	F-CAN B L	CAN gateway 16P connector *2 (female terminals):	No. 14		No. 38
U0104-00	F-CAN B H	CAN gateway 12P connector *1 (female terminals):	No. 12	Millimeter wave radar 8P connector	No. 7
	F-CAN B L	CAN gateway 12P connector *1 (female terminals):	No. 5		No. 6
	F-CAN B H	CAN gateway 16P connector *2 (female terminals):	No. 6		No. 7
	F-CAN B L	CAN gateway 16P connector *2 (female terminals):	No. 14		No. 6
U0126-00	F-CAN B H	CAN gateway 12P connector *1 (female terminals):	No. 12	EPS control unit connector B (6P)	No. 3
	F-CAN B L	CAN gateway 12P connector *1 (female terminals):	No. 5		No. 1
	F-CAN B H	CAN gateway 16P connector *2 (female terminals):	No. 6		No. 3
	F-CAN B L	CAN gateway 16P connector *2 (female terminals):	No. 14		No. 1
U0129-00	F-CAN B H	CAN gateway 12P connector *1 (female terminals):	No. 12	Electric brake booster 26P connector	No. 19
	F-CAN B L	CAN gateway 12P connector *1 (female terminals):	No. 5		No. 12
	F-CAN B H	CAN gateway 16P connector *2 (female terminals):	No. 6		No. 19
	F-CAN B L	CAN gateway 16P connector *2 (female terminals):	No. 14		No. 12
U0151-00	F-CAN B H	CAN gateway 12P connector *1 (female terminals):	No. 12	SRS unit connector A (39P)	No. 34
	F-CAN B L	CAN gateway 12P connector *1 (female terminals):	No. 5		No. 35
	F-CAN B H	CAN gateway 16P connector *2 (female terminals):	No. 6		No. 34
	F-CAN B L	CAN gateway 16P connector *2 (female terminals):	No. 14		No. 35

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

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

Is there 1.0 Ω or less?

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, replace the correspond control unit.

DTC	Transmitting Control Unit
U0100-00	PCM
U0104-00	Millimeter wave radar
U0126-00	EPS motor/control unit
U0129-00	Electric brake booster
U0151-00	SRS unit

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