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Home >> Acura >> 2014 >> MDX SH-AWD >> Repair and Diagnosis >> Brakes >> Traction Control >> VSA System - DTC Diagnostics (1 Of 2) (Except Hybrid) >> DTC Troubleshooting >> DTC U0100-00, U0101-00, U0104-00, U0114-00, U0126-00, U0128-00, U0151-00, U0155-00 (VSA Control Unit (With CAN Gateway)) (2017 2018)

DTC U0100-00, U0101-00, U0104-00, U0114-00, U0126-00, U0128-00, U0151-00, U0155-00 (VSA Control Unit (With CAN Gateway)) (2017 2018)

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 U0114-00  : CAN Communication Failure with SH-AWD

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: 

DTC Description DTC Freeze Frame
U0100-00 CAN Communication Failure with ECM/ISU    
U0101-00 CAN Communication Failure with PCM/TCM    
U0104-00 Driving Support System Control Unit    
U0114-00 CAN Communication Failure with SH-AWD    
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    

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    
    U0104-00 Driving Support System Control Unit    
    U0114-00 CAN Communication Failure with SH-AWD    
    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 (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. DTC check (CAN gateway system)

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

    DTC Description DTC
       

    Is DTC 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?

    VSA modulator-control unit (Bus A) is Not Available

    Go to step 4.

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

    Go to step 5.

    VSA modulator-control unit (Bus A and B) is Available

    Go to step 6.

  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.

    VSA modulator-control unit 38P connector
    CAN gateway 24P connector

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

    Test condition Vehicle OFF (LOCK) mode
      VSA modulator-control unit 38P connector: disconnected
      CAN gateway 24P connector: disconnected
    Test circuit 1  
    Test point 1 VSA modulator-control unit 38P connector No. 38 - Refer to:
    VSA Modulator-Control Unit Connector for Inputs and Outputs (2017 2018 2019 2020)
    Test point 2 CAN gateway 24P connector (female terminals) No. 14:
    Test circuit 2  
    Test point 1 VSA modulator-control unit 38P connector No. 26 - Refer to:
    VSA Modulator-Control Unit Connector for Inputs and Outputs (2017 2018 2019 2020)
    Test point 2 CAN gateway 24P connector (female terminals) No. 15:
    GHH329058Courtesy 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 38P connector. If they are OK, replace the VSA modulator-control unit .

    NO 

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

  5. 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.

    VSA modulator-control unit 38P connector
    CAN gateway 24P connector

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

    Test condition Vehicle OFF (LOCK) mode
      VSA modulator-control unit 38P connector: disconnected
      CAN gateway 24P connector: disconnected
    Test circuit 1  
    Test point 1 VSA modulator-control unit 38P connector No. 31 - Refer to:
    VSA Modulator-Control Unit Connector for Inputs and Outputs (2017 2018 2019 2020)
    Test point 2 CAN gateway 24P connector (female terminals) No. 11:
    Test circuit 2  
    Test point 1 VSA modulator-control unit 38P connector No. 20 - Refer to:
    VSA Modulator-Control Unit Connector for Inputs and Outputs (2017 2018 2019 2020)
    Test point 2 CAN gateway 24P connector (female terminals) No. 10:
    GHH329061Courtesy 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 38P connector. If they are OK, replace the VSA modulator-control unit .

    NO 

    Repair an open in the wire between the VSA modulator-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

    - 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 getaway Bus channel (s) at normal
    U0100-00 PCM A, B
    U0101-00 TCM A, B
    U0104-00 Multipurpose camera unit A
    U0114-00 SH-AWD control unit A
    U0126-00 Steering angle sensor A
    U0128-00 Electric parking brake control unit A
    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 - Refer to:

    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.

    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: TCM (Bus A) is Not Available

    Go to step 7.

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

    Go to step 8.

    U0104-00: Multipurpose camera unit (Bus A) is Not Available

    Go to step 7.

    U0114-00: SH-AWD control unit (Bus A) is Not Available

    Go to step 7.

    U0126-00: Steering angle sensor (Bus A) is Not Available

    Go to step 7.

    U0128-00: Electric parking brake control unit (Bus A) is Not Available

    Go to step 7.

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

    Go to step 7.

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

    Go to step 7.

  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 24P connector
    U0100-00 PCM connector A (51P)
    U0101-00 TCM 58P connector
    U0104-00 Multipurpose camera unit 20P connector
    U0114-00 SH-AWD control unit 24P 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.

    - 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 24P 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 24P connector (female terminals): No. 14 PCM connector A (51P) - Refer to:
    PCM Connector for Inputs and Outputs (2017 2018 2019 2020)    		 No. 9
    F-CAN A_L No. 15 No. 10
    U0101-00 F-CAN A_H CAN gateway 24P connector (female terminals): No. 14 TCM 58P connector No. 34
    F-CAN A_L No. 15 No. 47
    U0104-00 F-CAN A_H CAN gateway 24P connector (female terminals): No. 14 Multipurpose camera unit 20P connector - Refer to:
    Multipurpose Camera Unit Connector for Inputs and Outputs (2017 2018 2019 2020), .    		 No. 2
    F-CAN A_L No. 15 No. 13
    U0114-00 F-CAN A_H CAN gateway 24P connector (female terminals): No. 14 SH-AWD control unit 24P connector - Refer to:
    SH-AWD? Control Unit Connector for Inputs and Outputs (2017 2018 2019 2020) .    		 No. 14
    F-CAN A_L No. 15 No. 24
    U0126-00 F-CAN A_H CAN gateway 24P connector (female terminals): No. 14 Steering angle sensor 4P connector (female terminals): No. 2
    F-CAN A_L No. 15 No. 3
    U0128-00 F-CAN A_H CAN gateway 24P connector (female terminals): No. 14 Electric parking brake control unit 30P connector No. 30
    F-CAN A_L No. 15 No. 29
    U0151-00 F-CAN A_H CAN gateway 24P connector (female terminals): No. 14 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. 15 No. 35
    U0155-00 F-CAN A_H CAN gateway 24P connector (female terminals): No. 14 Gauge control module connector A (32P) (female terminals): No. 27
    F-CAN A_L No. 15 No. 28
    GHH329072Courtesy of HONDA, U.S.A., INC.
    GHH329073Courtesy of HONDA, U.S.A., INC.
    GHH329074Courtesy 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 - Refer to:

    PCM Removal and Installation (2016 2017 2018 2019 2020)
    U0101-00 TCM
    U0104-00 Multipurpose camera unit
    U0114-00 SH-AWD control unit - Refer to:
    SH-AWD ® Control Unit Removal and Installation (SH-AWD) (2016 2017 2018 2019 2020) or
    U0126-00 Steering angle sensor
    U0128-00 Electric parking brake control unit
    U0151-00 SRS unit - Refer to:
    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.

  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 24P 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.

    - 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 24P 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 24P connector (female terminals): No. 11 PCM connector A (51P) - Refer to:
    PCM Connector for Inputs and Outputs (2017 2018 2019 2020)    		 No. 11
    F-CAN B_L No. 10 No. 12
    U0101-00 F-CAN B_H CAN gateway 24P connector (female terminals): No. 11 TCM 58P connector No. 7
    F-CAN B_L No. 10 No. 20
    GHH329077Courtesy 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 (2016 2017 2018 2019 2020)
    U0101-00 TCM

    NO 

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

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