DTC U0100-00, U0101-00, U0122-00, U0151-00, U0155-00 (Electric Parking Brake Control Unit (With CAN Gateway)) (2019 2020)

DTC U0100-00  : F-CAN Malfunction (Electric Parking Brake Control Unit-PCM)

DTC U0101-00  : F-CAN Malfunction (Electric Parking Brake Control Unit-TCM)

DTC U0122-00  : F-CAN Malfunction (Electric Parking Brake Control Unit-VSA Modulator-Control Unit)

DTC U0151-00  : F-CAN Malfunction (Electric Parking Brake Control Unit-SRS Unit)

DTC U0155-00  : F-CAN Malfunction (Electric Parking Brake Control Unit-Gauge Control Module)

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 electric parking brake control unit.

DTC (Electric parking brake)

1. DTC check (electric parking brake 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. Check for DTCs with the HDS.

   DTC Description	DTC
   U0100-00 F-CAN Malfunction (Electric Parking Brake Control Unit-PCM)
   U0101-00 F-CAN Malfunction (Electric Parking Brake Control Unit-TCM)
   U0122-00 F-CAN Malfunction (Electric Parking Brake Control Unit-VSA Modulator-Control Unit)
   U0151-00 F-CAN Malfunction (Electric Parking Brake Control Unit-SRS Unit)
   U0155-00 F-CAN Malfunction (Electric Parking Brake Control Unit-Gauge Control Module)

   Is DTC indicated?

   YES 

   Go to step 2.

   NO 

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

2. 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.

   NO 

   Go to step 3.

3. F-CAN circuit communication check (Receiving control unit)

   - 1. Select 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?

   Electric parking brake control unit (Bus A) is Not Available

   Go to step 4.

   Electric parking brake control unit (Bus A) is Available

   Go to step 5.

4. 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.

   Electric parking brake control unit 30P connector

   CAN gateway 16P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	Electric parking brake control unit 30P connector: disconnected
   	CAN gateway 16P connector: disconnected
   Test circuit 1
   Test point 1	Electric parking brake control unit 30P connector No. 30
   Test point 2	CAN gateway 16P connector (female terminals) No. 3:

   Test circuit 2
   Test point 1	Electric parking brake control unit 30P connector No. 29
   Test point 2	CAN gateway 16P connector (female terminals) No. 11:

   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 or substitute a known-good electric parking brake control unit , then recheck. If the symptom/indication goes away with a known-good electric parking brake control unit, replace the original electric parking brake control unit .

   NO 

   Repair an open in the wire between the electric parking brake control unit and the CAN gateway.

5. F-CAN circuit communication check (Transmitting control unit)

   - 1. Select FUNCTION TEST in the CAN gateway with the HDS, then select the F-CAN Bus Connected Unit Check.

   F-CAN Bus Connected Unit Check

   - 2. 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, B
   U0122-00	VSA modulator-control unit	A, B
   U0151-00	SRS unit	A
   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 6.

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

   Go to step 7.

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

   Go to step 6.

   U0101-00: TCM (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 A) is Not Available

   Go to step 6.

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

   Go to step 6.

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 according to the detected DTC.

   DTC	Connector
   	CAN gateway 16P connector
   U0100-00	PCM connector A (51P)
   U0101-00	TCM 58P connector
   U0122-00	VSA modulator-control unit 38P connector
   U0151-00	SRS unit connector A (39P)
   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
   	Transmitting control unit connector (s) for indicated DTCs: disconnected
   	CAN gateway 16P connector: 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 (51P) - Refer to: PCM Connector for Inputs and Outputs (2017 2018 2019 2020),	No. 9
   	F-CAN A_L		No. 11		No. 10
   U0101-00	F-CAN A_H	CAN gateway 16P connector (female terminals):	No. 3	TCM 58P connector	No. 34
   	F-CAN A_L		No. 11		No. 47
   U0122-00	F-CAN A_H	CAN gateway 16P connector (female terminals):	No. 3	VSA modulator-control unit 38P connector - Refer to: VSA Modulator-Control Unit Connector for Inputs and Outputs (2017 2018 2019 2020)	No. 38
   	F-CAN A_L		No. 11		No. 26
   U0151-00	F-CAN A_H	CAN gateway 16P connector (female terminals):	No. 3	SRS unit connector A (39P) - Refer to: SRS Unit Connector for Inputs and Outputs (2017 2018 2019 2020)	No. 34
   	F-CAN A_L		No. 11		No. 35
   U0155-00	F-CAN A_H	CAN gateway 16P connector (female terminals):	No. 3	Gauge control module connector A (32P) (female terminals):	No. 27
   	F-CAN A_L		No. 11		No. 28

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

   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, replace the correspond control unit.

   DTC	Transmitting Control Unit
   U0100-00	PCM - Refer to: PCM Removal and Installation (2016 2017 2018 2019 2020)
   U0101-00	TCM
   U0122-00	VSA modulator-control unit
   U0151-00	SRS unit - Refer to: SRS Unit Removal and Installation (2017 2018 2019 2020)
   U0155-00	Gauge control module

   NO 

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

7. 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 16P connector
   U0100-00	PCM connector A (51P)
   U0101-00	TCM 58P connector
   U0122-00	VSA modulator-control unit 38P connector

   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
   	Transmitting control unit connector (s) for indicated DTCs: disconnected
   	CAN gateway 16P connector: 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 (51P) - Refer to: PCM Connector for Inputs and Outputs (2017 2018 2019 2020)	No. 11
   	F-CAN B_L		No. 14		No. 12
   U0101-00	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	TCM 58P connector	No. 7
   	F-CAN B_L		No. 14		No. 20
   U0122-00	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	VSA modulator-control unit 38P connector - Refer to: VSA Modulator-Control Unit Connector for Inputs and Outputs (2017 2018 2019 2020)	No. 31
   	F-CAN B_L		No. 14		No. 20

   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, replace the correspond control unit.

   DTC	Transmitting Control Unit
   U0100-00	PCM - Refer to: PCM Removal and Installation (2016 2017 2018 2019 2020)
   U0101-00	TCM
   U0122-00	VSA modulator-control unit

   NO 

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