DTC U0100-00, U0101-00, U0104-00, U0111-00, U0122-00, U0128-00, U0151-00, U0155-00 (Electric Servo Brake Control Unit)

DTC U0100-00  : F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With Management ECU)

DTC U0101-00  : F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With TCM/PCM (Gear System))

DTC U0104-00  : F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With Driving Support System Control Unit)

DTC U0111-00  : Lost communication With Battery Energy Control Module A

DTC U0122-00  : F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With VSA Modulator-Control Unit)

DTC U0128-00  : F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With Electric Parking Brake Control Unit)

DTC U0151-00  : F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With SRS Unit)

DTC U0155-00  : F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With Gauge Control Module)

NOTE: 

• Before you troubleshoot, review the general troubleshooting information .
• According to the detected DTC(s), confirm the control unit that the electric servo brake control unit lost communication with has the proper power supply and ground connection. Refer to the input testing for that control unit if necessary.

DTC (Electric servo brake)

1. 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 to the READY TO DRIVE mode.

   -4. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   U0100-00 F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With Management ECU)
   U0101-00 F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With TCM/PCM (Gear System))
   U0104-00 F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With Driving Support System Control Unit)
   U0111-00 Lost communication With Battery Energy Control Module A
   U0122-00 F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With VSA Modulator-Control Unit)
   U0128-00 F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With Electric Parking Brake Control Unit)
   U0151-00 F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With SRS Unit)
   U0155-00 F-CAN Malfunction (Electric Servo Brake Control Unit Lost Communication With 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 . 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. 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 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?

   Electric servo brake control unit (Bus B) is Not Available

   Go to step 4.

   Electric servo brake control unit (Bus C) is Not Available

   Go to step 5.

   Electric servo brake control unit (Bus B and C) is Available

   Go to step 6.

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.

   Electric servo brake control unit 22P connector

   CAN gateway 16P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	Electric servo brake control unit 22P connector: disconnected
   	CAN gateway 16P connector: disconnected
   Test circuit 1
   Test point 1	Electric servo brake control unit 22P connector No. 15
   Test point 2	CAN gateway 16P connector (female terminals) No. 6:

   Test circuit 2
   Test point 1	Electric servo brake control unit 22P connector No. 14
   Test point 2	CAN gateway 16P connector (female terminals) No. 14:

   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 electric servo brake control unit 22P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the electric servo brake control unit/pedal feel simulator .

   NO 

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

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

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

   -2. Disconnect the following connectors.

   Electric servo brake control unit 22P connector

   CAN gateway 16P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	Electric servo brake control unit 22P connector: disconnected
   	CAN gateway 16P connector: disconnected
   Test circuit 1
   Test point 1	Electric servo brake control unit 22P connector No. 19
   Test point 2	CAN gateway 16P connector (female terminals) No. 5:

   Test circuit 2
   Test point 1	Electric servo brake control unit 22P connector No. 18
   Test point 2	CAN gateway 16P connector (female terminals) No. 13:

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

   Is there 1.0 Ω or less?

   YES 

   The F-CAN C_H and F-CAN C_L wires are OK. Check for loose terminals and poor connections in the electric servo brake control unit 22P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the electric servo brake control unit/pedal feel simulator .

   NO 

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

6. 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	PCM	A, B
   U0104-00	Millimeter wave radar	C
   U0111-00	Battery condition monitor module	A
   U0122-00	VSA modulator-control unit	B, C
   U0128-00	VSA modulator-control unit	B, C
   U0151-00	SRS unit	C
   U0155-00	Gauge control module	D

   Is it detected normally?

   Detected normal

   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.

   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: PCM (Bus A) is Not Available

   Go to step 7.

   U0101-00: PCM (Bus B) is Not Available

   Go to step 8.

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

   Go to step 9.

   U0111-00: Battery condition monitor module (Bus A) is Not Available

   Go to step 7.

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

   Go to step 8.

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

   Go to step 9.

   U0128-00: VSA modulator-control unit (Bus B) is Not Available

   Go to step 8.

   U0128-00: VSA modulator-control unit (Bus C) is Not Available

   Go to step 9.

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

   Go to step 9.

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

   Go to step 10.

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 16P connector
   U0100-00	PCM connector A (50P)
   U0101-00	PCM connector A (50P)
   U0111-00	Battery condition monitor module connector E (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 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 (50P)	No. 37
   	F-CAN A_L		No. 11		No. 36
   U0101-00	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
   U0111-00	F-CAN A_H	CAN gateway 16P connector (female terminals):	No. 3	Battery condition monitor module connector E (32P)	No. 9
   	F-CAN A_L		No. 11		No. 8

   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	PCM
   U0111-00	Battery condition monitor module

   NO 

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

8. 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 (50P)
   U0101-00	PCM connector A (50P)
   U0122-00	VSA modulator-control unit 46P connector
   U0128-00	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 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 (50P)	No. 39
   	F-CAN B_L		No. 14		No. 38

   DTC	Circuit name	Test point 1 (Receiving control unit)		Test point 2 (Transmitting control unit)
   		Connector	Terminal	Connector	Terminal
   U0101-00	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. 40
   	F-CAN B_L		No. 14		No. 28
   U0128-00	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	VSA modulator-control unit 46P connector	No. 40
   	F-CAN B_L		No. 14		No. 28

   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
   U0101-00	PCM
   U0122-00	VSA modulator-control unit
   U0128-00	VSA modulator-control unit

   NO 

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

9. Open wire check (F-CAN C_H, F-CAN C_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
   U0104-00	Millimeter wave radar 8P connector
   U0122-00	VSA modulator-control unit 46P connector
   U0128-00	VSA modulator-control unit 46P 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.

   -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 16P connector: disconnected

   DTC	Circuit name	Test point 1 (Receiving control unit)		Test point 2 (Transmitting control unit)
   		Connector	Terminal	Connector	Terminal
   U0104-00	F-CAN C_H	CAN gateway 16P connector (female terminals):	No. 5	Millimeter wave radar 8P connector	No. 7
   	F-CAN C_L		No. 13		No. 6

   DTC	Circuit name	Test point 1 (Receiving control unit)		Test point 2 (Transmitting control unit)
   		Connector	Terminal	Connector	Terminal
   U0122-00	F-CAN C_H	CAN gateway 16P connector (female terminals):	No. 5	VSA modulator-control unit 46P connector	No. 46
   	F-CAN C_L		No. 13		No. 34
   U0128-00	F-CAN C_H	CAN gateway 16P connector (female terminals):	No. 5	VSA modulator-control unit 46P connector	No. 46
   	F-CAN C_L		No. 13		No. 34
   U0151-00	F-CAN C_H	CAN gateway 16P connector (female terminals):	No. 5	SRS unit connector A (39P)	No. 34
   	F-CAN C_L		No. 13		No. 35

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

   Is there 1.0 Ω or less?

   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, replace the correspond control unit.

   DTC	Transmitting Control Unit
   U0104-00	Millimeter wave radar
   U0122-00	VSA modulator-control unit
   U0128-00	VSA modulator-control unit
   U0151-00	SRS unit

   NO 

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

10. Open wire check (F-CAN D_H, F-CAN D_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
    U0155-00	Gauge control module connector A (32P)

    -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 16P connector: disconnected

    DTC	Circuit name	Test point 1 (Receiving control unit)		Test point 2 (Transmitting control unit)
    		Connector	Terminal	Connector	Terminal
    U0155-00	F-CAN D_H	CAN gateway 16P connector (female terminals):	No. 7	Gauge control module connector A (32P)	No. 19
    	F-CAN D_L		No. 15		No. 20

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

    Is there 1.0 Ω or less?

    YES 

    The F-CAN D_H and F-CAN D_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
    U0155-00	Gauge control module

    NO 

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