DTC U0100-00, U0122-00, U0151-00, U129C-00(EPS Control Unit (With CAN Gateway))

DTC U0100-00 : F-CAN Malfunction (EPS Control Unit-PCM/TCM)

DTC U0122-00 : F-CAN Malfunction (EPS Control Unit-VSA/ABS Modulator-Control Unit)

DTC U0151-00 : F-CAN Malfunction (EPS Control Unit-SRS Unit)

DTC U129C-00 : F-CAN Malfunction (EPS Control Unit-Driving Support System Control 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 EPS control unit.

*1: CAN gateway 12P connector type*2: CAN gateway 16P connector type

DTC Description	DTC	Freeze Frame
U0100-00 F-CAN Malfunction (EPS Control Unit-PCM/TCM)
U0122-00 F-CAN Malfunction (EPS Control Unit-VSA/ABS Modulator-Control Unit)
U0151-00 F-CAN Malfunction (EPS Control Unit-SRS Unit)
U129C-00 F-CAN Malfunction (EPS Control Unit-Driving Support System Control Unit)

DTC (EPS)

DTC check

-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. Wait 10 seconds or more.

-5. Check for DTCs with the HDS.

DTC Description	DTC	Freeze Frame
U0100-00 F-CAN Malfunction (EPS Control Unit-PCM/TCM)
U0122-00 F-CAN Malfunction (EPS Control Unit-VSA/ABS Modulator-Control Unit)
U0151-00 F-CAN Malfunction (EPS Control Unit-SRS Unit)
U129C-00 F-CAN Malfunction (EPS Control Unit-Driving Support System Control Unit)

Is DTC indicated?

YES

Go to step 2.

Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting . If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.

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?

EPS control unit (Bus B) is Not Available

Go to step 4.

EPS control unit (Bus B) is Available

Go to step 5.

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.

EPS control unit connector B (6P)

CAN gateway 12P connector *1CAN gateway 16P connector *2

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

Test condition	Vehicle OFF (LOCK) mode
	EPS control unit connector B (6P): disconnected
	CAN gateway 12P connector *1: disconnected
	CAN gateway 16P connector *2: disconnected
Test circuit 1
Test point 1	EPS control unit connector B (6P) No. 3
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	EPS control unit connector B (6P) No. 1
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 at the EPS control unit connectors. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or substitute a known-good EPS motor/control unit , then recheck. If the symptom/indication goes away with a known-good EPS motor/control unit, replace the original EPS motor/control unit .

Repair an open in the wire between the EPS 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
U0122-00	VSA modulator-control unit	A, B
U0151-00	SRS unit	B
U129C-00	Millimeter wave radar	B

Is it detected normally?

Detected normal

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

Go to step 6.

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

Go to step 7.

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

Go to step 6.

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

Go to step 7.

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

Go to step 7.

U129C-00: Millimeter wave radar (Bus B) 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 1CAN gateway 16P connector 2
U0100-00	PCM connector A (50P)
U0122-00	VSA modulator-control unit 46P connector

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
U0122-00	F-CAN A_H	CAN gateway 12P connector *1 (female terminals):	No. 3	VSA modulator-control unit 46P connector	No. 40
	F-CAN A_L	CAN gateway 12P connector *1 (female terminals):	No. 9		No. 28
	F-CAN A_H	CAN gateway 16P connector *2 (female terminals):	No. 3		No. 40
	F-CAN A_L	CAN gateway 16P connector *2 (female terminals):	No. 11		No. 28

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
U0122-00	VSA modulator-control unit

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 1CAN gateway 16P connector 2
U0100-00	PCM connector A (50P)
U0122-00	VSA modulator-control unit 46P connector
U0151-00	SRS unit connector A (39P)
U129C-00	Millimeter wave radar 8P connector

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
U0122-00	F-CAN B_H	CAN gateway 12P connector *1 (female terminals):	No. 12	VSA modulator-control unit 46P connector	No. 46
	F-CAN B_L	CAN gateway 12P connector *1 (female terminals):	No. 5		No. 34
	F-CAN B_H	CAN gateway 16P connector *2 (female terminals):	No. 6		No. 46
	F-CAN B_L	CAN gateway 16P connector *2 (female terminals):	No. 14		No. 34
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
U129C-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

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
U0122-00	VSA modulator-control unit
U0151-00	SRS unit
U129C-00	Millimeter wave radar

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