DTC: U0100-00, U0122-00, U0151-00, U0155-00, U129C-00 (EPS Control Unit: With ACC)

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 U0155-00  : F-CAN Malfunction (EPS Control Unit-Gauge Control Module)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.
• Before disconnecting the SRS unit connector, do the 12 volt battery terminal disconnection procedure , and wait for at least 3 minutes.

DTC (EPS)

1. Problem verification

   -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 ON mode.

   -4. Wait for 60 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)
   U0155-00 F-CAN Malfunction (EPS Control Unit-Gauge Control Module)

   DTC Description	DTC	Freeze Frame
   U129C-00 F-CAN Malfunction (EPS Control Unit-Driving Support System Control Unit)

   Is any of DTC indicated?

   YES 

   Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. 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.

2. CAN gateway system DTC check

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

   DTC Description	DTC

   Are any DTCs indicated?

   YES 

   Go to indicated DTCs troubleshooting

   NO 

   Go to step 3.

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?

   Bus B is Not Available

   Go to step 4.

   Bus B is Available

   Go to step 5.

4. 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

   EPS control unit connector B (6P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	CAN gateway 16P connector: disconnected
   	EPS control unit connector B (6P): disconnected
   Test point 1	CAN gateway 16P connector (female terminals) No. 6:
   Test point 2	EPS control unit connector B (6P) No. 4

   Test point 1	CAN gateway 16P connector (female terminals) No. 14:
   Test point 2	EPS control unit connector B (6P) No. 1

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

   Is there continuity?

   YES 

   The F-CAN B_H wire and F-CAN B_L wire are OK. Check for loose terminals and poor connections at the EPS control unit connector B (6P) and the CAN gateway 16P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the steering gearbox.

   NO 

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

5. 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 *1	PCM	A, B
   U0100-00 *2	PCM	A, D
   U0122-00	VSA modulator-control unit	A, B
   U0151-00	SRS unit	B
   U0155-00	Gauge control module	C
   U129C-00 *1	Millimeter wave radar	D
   U129C-00 *2	Millimeter wave radar	E

   *1:M/T/CVT

   *2:A/T

   Is it detected normally?

   Detected normal

   Intermittent failure, the system is OK at this time. Check for loose terminals and poor connections 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.

   U0100-00: PCM is Not Available for Bus D

   Go to step 9.

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

   Go to step 6.

   U0122: VSA modulator-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.

   U129C-00: Millimeter wave radar is Not Available for Bus D

   Go to step 9.

   U129C-00: Millimeter wave radar is Not Available for Bus E

   Go to step 10.

6. Open wire check (F-CAN A_H, F-CAN A_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)
   U0122-00	VSA modulator-control unit 46P connector

   NOTE:  Before disconnecting the PCM connector A (50P), jump the SCS line with the HDS, and wait more than 1 minute.

   -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)
   		Connector	Terminal	Connector	Terminal
   U0100-00	F-CAN A_H	CAN gateway 16P connector (female terminals):	No. 3	PCM connector A (50P)	No. 37
   	F-CAN A_L		No. 11		No. 36
   U0122-00	F-CAN A_H	CAN gateway 16P connector (female terminals):	No. 3	VSA modulator-control unit 46P connector	No. 20
   	F-CAN A_L		No. 11		No. 21

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

   Is there continuity?

   YES 

   The F-CAN A_H wire and F-CAN A_L wire 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	Operation for transmitting control unit
   U0100-00	Check for loose terminals and poor connections at the CAN gateway and the PCM. If they are OK, replace the PCM .
   U0122-00	Check for loose terminals and poor connections at the CAN gateway and the VSA modulator-control unit. If they are OK, Replace the VSA modulator-control unit .

   NO 

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

7. 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
   U0100-00	PCM connector A (50P)
   U0122-00	VSA modulator-control unit 46P connector
   U0151-00	SRS unit connector A (43P)

   NOTE: 

   • Before disconnecting the PCM connector A (50P), jump the SCS line with the HDS, and wait more than 1 minute.
   • Before disconnecting the SRS unit connector, do the 12 volt battery terminal disconnection procedure , and wait for at least 3 minutes.

   -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)
   		Connector	Terminal	Connector	Terminal
   U0100-00	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	PCM connector A (50P)	No. 39
   	F-CAN B_L		No. 14		No. 38
   U0122-00	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	VSA modulator-control unit 46P connector	No. 24
   	F-CAN B_L		No. 14		No. 25
   U0151-00	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	SRS unit connector A (43P)	No. 16
   	F-CAN B_L		No. 14		No. 17

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

   Is there continuity?

   YES 

   The F-CAN B_H wire and F-CAN B_L wire 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	Operation for transmitting control unit
   U0100-00	Check for loose terminals and poor connections at the CAN gateway and the PCM. If they are OK, replace the PCM .
   U0122-00	Check for loose terminals and poor connections at the CAN gateway and the VSA modulator-control unit. If they are OK, replace the VSA modulator-control unit .
   U0151-00	Check for loose terminals and poor connections at the CAN gateway and the SRS unit. If they are OK, replace the SRS unit .

   NO 

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

8. 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
   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)
   		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
   	F-CAN C_L		No. 13		No. 21

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

   Is there continuity?

   YES 

   The F-CAN C_H wire and F-CAN C_L wire 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	Operation for transmitting control unit
   U0155-00	Check for loose terminals and poor connections at the CAN gateway and the Gauge control module. If they are OK, replace the Gauge control module .

   NO 

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

9. Open wire check (F-CAN D_H, F-CAN D_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)
   U129C-00	Millimeter wave radar 8P connector

   NOTE:  Before disconnecting the PCM connector A (50P), jump the SCS line with the HDS, and wait more than 1 minute.

   -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)
   		Connector	Terminal	Connector	Terminal
   U0100-00	F-CAN D_H	CAN gateway 16P connector (female terminals):	No. 7	PCM connector A (50P)	No. 39
   	F-CAN D_L		No. 15		No. 38
   U129C-00	F-CAN D_H	CAN gateway 16P connector (female terminals):	No. 7	Millimeter wave radar 8P connector	No. 7
   	F-CAN D_L		No. 15		No. 6

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

   Is there continuity?

   YES 

   The F-CAN D_H wire and F-CAN D_L wire 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	Operation for transmitting control unit
   U0100-00	Check for loose terminals and poor connections at the CAN gateway and the PCM. If they are OK, replace the PCM .
   U129C-00	Check for loose terminals and poor connections at the CAN gateway and the Millimeter wave radar. If they are OK, Replace the Millimeter wave radar .

   NO 

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

10. Open wire check (F-CAN E_H, F-CAN E_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
    U129C-00	Millimeter wave radar 8P 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)
    		Connector	Terminal	Connector	Terminal
    U129C-00	F-CAN E_H	CAN gateway 16P connector (female terminals):	No. 16	Millimeter wave radar 8P connector	No. 7
    	F-CAN E_L		No. 8		No. 6

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

    Is there continuity?

    YES 

    The F-CAN E_H wire and F-CAN E_L wire 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	Operation for transmitting control unit
    U129C-00	Check for loose terminals and poor connections at the CAN gateway and the Millimeter wave radar. If they are OK, Replace the Millimeter wave radar .

    NO 

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