DTC U0100-00, U0101-00, U0104-00, U0123-00, U0126-00, U0129-00, U0151-00, U0155-00 (VSA Control Unit: With ACC)

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 U0123-00  : CAN Communication Failure with Yaw-Rate/Acceleration Sensor 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 .
• Refer to the DTC code shown on the display, and then inspect the connectors and terminals based on the instructions in the table.
• These DTC (s) may be stored due to a power/ground circuit failure of the appropriate transmitting control unit. Before doing this troubleshooting, check the power/ground circuit of the appropriate transmitting control unit first.

DTC (VSA)

1. CAN gateway system DTC check

   -1. Turn the vehicle to the ON mode.

   -2. Check for CAN gateway system DTCs with the HDS.

   DTC Description	DTC

   DTC (CAN gateway)

   Is DTC indicated?

   YES 

   Go to indicated DTC's troubleshooting .

   NO 

   Go to step 2.

2. 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

   Does the VSA modulator-control unit detect the CAN gateway Bus channels A and B?

   Bus A is Not Available

   Go to step 3.

   Bus B is Not Available

   Go to step 4.

   Bus A and B are Available

   Go to step 5.

3. 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.

   CAN gateway 16P connector

   VSA modulator-control unit 46P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	CAN gateway 16P connector: disconnected
   	VSA modulator-control unit 46P connector: disconnected
   Test point 1	CAN gateway 16P connector (female terminals) No. 3:
   Test point 2	VSA modulator-control unit 46P connector No. 20

   Test point 1	CAN gateway 16P connector (female terminals) No. 11:
   Test point 2	VSA modulator-control unit 46P connector No. 21

   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 loose terminals and poor connections in the VSA modulator-control unit connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or replace the VSA modulator-control unit .

   NO 

   Repair an open in the wire between the VSA modulator-control unit and the CAN gateway.

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

   VSA modulator-control unit 46P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	CAN gateway 16P connector: disconnected

   	VSA modulator-control unit 46P connector: disconnected
   Test point 1	CAN gateway 16P connector (female terminals) No. 6:
   Test point 2	VSA modulator-control unit 46P connector No. 24

   Test point 1	CAN gateway 16P connector (female terminals) No. 14:
   Test point 2	VSA modulator-control unit 46P connector No. 25

   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 loose terminals and poor connections in the VSA modulator-control unit connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or replace the VSA modulator-control unit .

   NO 

   Repair an open in the wire between the VSA modulator-control unit and the CAN gateway.

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 *2	PCM	A, D
   U0100-00 *1*3	PCM	A, B
   U0101-00 *2	TCM	A, D
   U0101-00 *3	TCM	A
   U0104-00 *2	Millimeter wave radar	E
   U0104-00 *1*3	Millimeter wave radar	D
   U0123-00	SRS unit	B
   U0126-00	EPS control unit	B
   U0129-00	Electric brake booster	A, B
   U0151-00	SRS unit	B
   U0155-00	Gauge control module	C

   *1: MT

   *2: A/T

   *3: CVT

   Is it detected normally?

   Detected normal

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

   U0101-00: TCM is Not Available for Bus A

   Go to step 6.

   U0101-00: TCM is Not Available for Bus D

   Go to step 9.

   U0104-00: Millimeter wave radar is Not Available for Bus D

   Go to step 9.

   U0104-00: Millimeter wave radar is Not Available for Bus E

   Go to step 10.

   U0123-00: SRS unit is Not Available for Bus B

   Go to step 7.

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

   Go to step 7.

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

   Go to step 6.

   U0129-00: Electric brake booster 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.

6. Open wire check (F-CAN A H, F-CAN A 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)
   U0101-00	TCM 23P connector *1TCM 50P connector *2
   U0129-00	Electric brake booster 26P connector

   *1: A/T

   *2: CVT

   NOTE: 

   • Jump the SCS line with the HDS, and wait more than 1 minute when disconnecting the PCM connector.
   • Before disconnecting the electric brake booster connector, open the driver's door and wait for 3 minutes without closing the driver's door.

   -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
   U0101-00 *1	F-CAN A H	CAN gateway 16P connector (female terminals):	No. 3	TCM 23P connector	No. 19
   	F-CAN A L		No. 11		No. 18
   U0101-00 *2	F-CAN A H	CAN gateway 16P connector (female terminals):	No. 3	TCM 50P connector	No. 3
   	F-CAN A L		No. 11		No. 11
   U0129-00	F-CAN A H	CAN gateway 16P connector (female terminals):	No. 3	Electric brake booster 26P connector	No. 26
   	F-CAN A L		No. 11		No. 18

   *1: A/T

   *2: CVT

   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, substitute or replace the correspond control unit.

   DTC	Transmitting Control Unit
   U0100-00	PCM
   U0101-00 *1	TCM
   U0101-00 *2	TCM
   U0129-00	Electric brake booster

   *1: A/T

   *2: CVT

   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)
   U0123-00	SRS unit connector A (43P)
   U0126-00	EPS control unit connector B (6P)
   U0129-00	Electric brake booster 26P connector
   U0151-00	SRS unit connector A (43P)

   NOTE: 

   • Jump the SCS line with the HDS, and wait more than 1 minute when disconnecting the PCM connector.
   • Before disconnecting the SRS unit connector, do the 12 volt battery terminal disconnection procedure and wait for at least 3 minutes.
   • Before disconnecting the electric brake booster connector, open the driver's door and wait for 3 minutes without closing the driver's door.

   -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
   U0123-00	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
   U0126-00	F-CAN B H	CAN gateway 16P connector (female terminals):	No. 6	EPS control unit connector B (6P)	No. 4
   	F-CAN B L		No. 14		No. 1
   U0129-00	F-CAN B H	CAN gateway 16P connector (female terminals):	No. 6	Electric brake booster 26P connector	No. 19
   	F-CAN B L		No. 14		No. 12
   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 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, substitute or replace the correspond control unit.

   DTC	Transmitting Control Unit
   U0100-00	PCM
   U0123-00	SRS unit
   U0126-00	EPS control unit
   U0129-00	Electric brake booster
   U0151-00	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

   DTC	Connector
   U0155-00	Gauge control module A (32P) 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
   U0155-00	F-CAN C H	CAN gateway 16P connector (female terminals):	No. 5	Gauge control module A (32P) connector	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 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, substitute or replace the correspond control unit.

   DTC	Transmitting Control Unit
   U0155-00	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)
   U0101-00	TCM 23P connector
   U0104-00	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. 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

   DTC	Circuit name	Test point 1 (Receiving control unit)		Test point 2 (Transmitting control unit)
   		Connector	Terminal	Connector	Terminal
   U0101-00	F-CAN D H	CAN gateway 16P connector (female terminals):	No. 7	TCM 23P connector	No. 13
   	F-CAN D L		No. 15		No. 12
   U0104-00	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 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, substitute or replace the correspond control unit.

   DTC	Transmitting Control Unit
   U0100-00	PCM
   U0101-00	TCM
   U0104-00	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
    U0104-00	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
    U0104-00	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 and F-CAN E 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, substitute or replace the correspond control unit.

    DTC	Transmitting Control Unit
    U0104-00	Millimeter wave radar

    NO 

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