DTC U0100-00, U0101-00, U0126-00, U0128-00, U0151-00, U0155-00

DTC U0100-00  : CAN Communication Failure with ECM/ISU

DTC U0101-00  : CAN Communication Failure with PCM/TCM

DTC U0126-00  : CAN Communication Failure with Absolute Steering Wheel Angle Sensor

DTC U0128-00  : CAN Communication Failure with Electric Parking Brake

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:

  How to Troubleshoot the VSA System (2014 2015 2016) or

  How to Troubleshoot the VSA System (2017 2018 2019 2020) 

• According to the detected DTC (s), check for the power circuit and the ground circuit of the control unit which cannot communicate with the VSA modulator-control unit.

DTC (VSA)

1. DTC check (VSA modulator-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. Test-drive the vehicle at 6 mph (10 km/h) or more.

   NOTE:  Drive the vehicle on the road, not on a lift.

   - 5. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   U0100-00 CAN Communication Failure with ECM/ISU
   U0101-00 CAN Communication Failure with PCM/TCM
   U0126-00 CAN Communication Failure with Absolute Steering Wheel Angle Sensor
   U0128-00 CAN Communication Failure with Electric Parking Brake
   U0151-00 CAN Communication Failure with SRS
   U0155-00 CAN Communication Failure with METER

   Is DTC indicated?

   YES 

   Go to step 2.

   NO 

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

   How to Troubleshoot the VSA System (2014 2015 2016) or

   How to Troubleshoot the VSA System (2017 2018 2019 2020) 

   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. 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 connector.

   VSA modulator-control unit 38P connector

   - 3. Disconnect the following connectors according to the detected DTC.

   DTC	Connector
   U0100-00	PCM connector A (51P)
   U0101-00	TCM 58P connector
   U0126-00	Steering angle sensor 4P connector
   U0128-00	Electric parking brake control unit 30P 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.

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

   Test condition	Vehicle OFF (LOCK) mode
   	VSA modulator-control unit 38P 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	VSA modulator-control unit 38P connector - Refer to: VSA Modulator-Control Unit Connector for Inputs and Outputs (2014 2015), or VSA Modulator-Control Unit Connector for Inputs and Outputs (2016), or VSA Modulator-Control Unit Connector for Inputs and Outputs (2017 2018 2019 2020)	No. 38	PCM connector A (51P) - Refer to: PCM Connector for Inputs and Outputs (2014 2015), or PCM Connector for Inputs and Outputs (2016), or PCM Connector for Inputs and Outputs (2017 2018 2019 2020)	No. 9
   	F-CAN A_L		No. 26		No. 10
   U0101-00	F-CAN A_H	VSA modulator-control unit 38P connector - Refer to: VSA Modulator-Control Unit Connector for Inputs and Outputs (2014 2015), or VSA Modulator-Control Unit Connector for Inputs and Outputs (2016), or VSA Modulator-Control Unit Connector for Inputs and Outputs (2017 2018 2019 2020)	No. 38	TCM 58P connector	No. 34
   	F-CAN A_L		No. 26		No. 47
   U0126-00	F-CAN A_H	VSA modulator-control unit 38P connector - Refer to: VSA Modulator-Control Unit Connector for Inputs and Outputs (2014 2015), or VSA Modulator-Control Unit Connector for Inputs and Outputs (2016), or VSA Modulator-Control Unit Connector for Inputs and Outputs (2017 2018 2019 2020)	No. 38	Steering angle sensor 4P connector (female terminals):	No. 2
   	F-CAN A_L		No. 26		No. 3
   U0128-00	F-CAN A_H	VSA modulator-control unit 38P connector - Refer to: VSA Modulator-Control Unit Connector for Inputs and Outputs (2014 2015), or VSA Modulator-Control Unit Connector for Inputs and Outputs (2016), or VSA Modulator-Control Unit Connector for Inputs and Outputs (2017 2018 2019 2020)	No. 38	Electric parking brake control unit 30P connector	No. 30
   	F-CAN A_L		No. 26		No. 29
   U0151-00	F-CAN A_H	VSA modulator-control unit 38P connector - Refer to: VSA Modulator-Control Unit Connector for Inputs and Outputs (2014 2015), or VSA Modulator-Control Unit Connector for Inputs and Outputs (2016), or VSA Modulator-Control Unit Connector for Inputs and Outputs (2017 2018 2019 2020)	No. 38	SRS unit connector A (39P) - Refer to: SRS Unit Connector for Inputs and Outputs (2014 2015), or SRS Unit Connector for Inputs and Outputs (2016) or SRS Unit Connector for Inputs and Outputs (2017 2018 2019 2020), .	No. 34
   	F-CAN A_L		No. 26		No. 35
   U0155-00	F-CAN A_H	VSA modulator-control unit 38P connector - Refer to: VSA Modulator-Control Unit Connector for Inputs and Outputs (2014 2015), or VSA Modulator-Control Unit Connector for Inputs and Outputs (2016), or VSA Modulator-Control Unit Connector for Inputs and Outputs (2017 2018 2019 2020)	No. 38	Gauge control module connector A (32P) (female terminals):	No. 27
   	F-CAN A_L		No. 26		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. Go to step 3.

   NO 

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

3. Open wire check (F-CAN B_H, F-CAN B_L lines)

   - 1. Disconnect the following connectors according to the detected DTC.

   DTC	Connector
   U0100-00	PCM connector A (51P)
   U0101-00	TCM 58P connector

   NOTE:  Jump the SCS line with the HDS, and wait more than 1 minute when disconnecting the PCM connector.

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

   Test condition	Vehicle OFF (LOCK) mode
   	VSA modulator-control unit 38P 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	VSA modulator-control unit 38P connector - Refer to: VSA Modulator-Control Unit Connector for Inputs and Outputs (2014 2015), or VSA Modulator-Control Unit Connector for Inputs and Outputs (2016), or VSA Modulator-Control Unit Connector for Inputs and Outputs (2017 2018 2019 2020)	No. 31	PCM connector A (51P) - Refer to: PCM Connector for Inputs and Outputs (2014 2015), or PCM Connector for Inputs and Outputs (2016), or PCM Connector for Inputs and Outputs (2017 2018 2019 2020)	No. 11
   	F-CAN B_L		No. 20		No. 12
   U0101-00	F-CAN B_H	VSA modulator-control unit 38P connector - Refer to: VSA Modulator-Control Unit Connector for Inputs and Outputs (2014 2015), or VSA Modulator-Control Unit Connector for Inputs and Outputs (2016), or VSA Modulator-Control Unit Connector for Inputs and Outputs (2017 2018 2019 2020)	No. 31	TCM 58P connector	No. 7
   	F-CAN B_L		No. 20		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, substitute or replace the correspond control unit.

   DTC	Transmitting Control Unit
   U0100-00	PCM - Refer to: PCM Removal and Installation (2014 2015) or PCM Removal and Installation (2016 2017 2018 2019 2020)
   U0101-00	TCM
   U0126-00	Steering angle sensor
   U0128-00	Electric parking brake control unit
   U0151-00	SRS unit - Refer to: SRS Unit Removal and Installation (2014 2015 2016) SRS Unit Removal and Installation (2017 2018 2019 2020), or
   U0155-00	Gauge control module

   NO 

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