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DTC U0100 (2016 2017 2018)

DTC U0100  : F-CAN Malfunction (PCM-TCM)

NOTE:
DTC Description Confirmed DTC Pending DTC Freeze Frame
U0100 F-CAN Malfunction (PCM-TCM)      

DTC (A/T)

  1. Problem verification

    -1. Turn the vehicle to the ON mode.

    - 2. Clear the DTC with the HDS.

    - 3. Check for Pending or Confirmed DTCs with the HDS.

    DTC Description Confirmed DTC Pending DTC Freeze Frame
    U0100 F-CAN Malfunction (PCM-TCM)      

    Is DTC U0100 indicated?

    YES 

    The failure is duplicated. Go to step 2.

    NO 

    Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the multipurpose camera unit, the CAN gateway, and the PCM. 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. 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
    U0029-00 CAN Gateway F-CAN ch A Bus Off  
    U0047-00 CAN Gateway F-CAN ch B Bus Off  
    U3000-49 CAN Gateway Internal Failure  

    Is DTC U0029-00, U0047-00, and/or U3000-49 indicated?

    YES 

    Go to the indicated DTC's troubleshooting in the CAN gateway system - Refer to: Fuel and Emissions Systems DTC Troubleshooting Index (2017 2018), or Fuel and Emissions Systems DTC Troubleshooting Index (KA/KC models) (2014 2015), or A/T System DTC Troubleshooting Index (KA/KC models) (2014 2015), or Fuel and Emissions Systems DTC Troubleshooting Index (2019 2020), or Brake Booster Pressure Monitoring System DTC Troubleshooting Index (2016 2017 2018 2019 2020), or Fuel and Emissions Systems DTC Troubleshooting Index (KA/KC models) (2016) .

    NO 

    Go to step 3.

  3. F-CAN circuit communication check

    -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?

    PCM (Bus A) is Not Available

    Go to step 4.

    PCM (Bus B) is Not Available

    Go to step 6.

    TCM (Bus A) is Not Available

    Go to step 8.

    TCM (Bus B) is Not Available

    Go to step 10.

    PCM and TCM are Detected

    Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals between the TCM, the CAN gateway, and the PCM.

  4. Open wire check (F-CAN A_H line)

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

    - 2. Jump the SCS line with the HDS.

    - 3. Disconnect the following connectors.

    CAN gateway 24P connector
    PCM connector A (51P)

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

    Test condition Vehicle OFF (LOCK) mode
      CAN gateway 24P connector: disconnected
      PCM connector A (51P): disconnected
    Test point 1 CAN gateway 24P connector No. 14
    Test point 2 PCM connector A (51P) No. 9 - 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)
    GHH316142Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The F-CAN A_H wire is OK. Go to step 5.

    NO 

    Repair an open in the F-CAN A_H wire between the CAN gateway and the PCM.

  5. Open wire check (F-CAN A_L line)

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

    Test condition Vehicle OFF (LOCK) mode
      CAN gateway 24P connector: disconnected
      PCM connector A (51P): disconnected
    Test point 1 CAN gateway 24P connector No. 15
    Test point 2 PCM connector A (51P) No. 10 - 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)
    GHH316143Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The F-CAN A_L wire is OK. Update the PCM if it does not have the latest software , or substitute a known-good PCM - Refer to: PCM Removal and Installation (2016 2017 2018 2019 2020) or PCM Removal and Installation (2014 2015) , then recheck. If this DTC goes away and the PCM was updated, troubleshooting is complete. If this DTC goes away and the PCM was substituted, replace the original PCM - Refer to: PCM Removal and Installation (2014 2015), or PCM Removal and Installation (2016 2017 2018 2019 2020) .

    NO 

    Repair an open in the F-CAN A_L wire between the CAN gateway and the PCM.

  6. Open wire check (F-CAN B_H line)

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

    - 2. Jump the SCS line with the HDS.

    - 3. Disconnect the following connectors.

    CAN gateway 24P connector
    PCM connector A (51P)

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

    Test condition Vehicle OFF (LOCK) mode
      CAN gateway 24P connector: disconnected
      PCM connector A (51P): disconnected
    Test point 1 CAN gateway 24P connector No. 11
    Test point 2 PCM connector A (51P) No. 11 - Refer to: PCM Connector for Inputs and Outputs (2017 2018 2019 2020), or PCM Connector for Inputs and Outputs (2014 2015), or PCM Connector for Inputs and Outputs (2016)
    GHH316144Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The F-CAN B_H wire is OK. Go to step 7.

    NO 

    Repair an open in the F-CAN B_H wire between the CAN gateway and the PCM.

  7. Open wire check (F-CAN B_L line)

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

    Test condition Vehicle OFF (LOCK) mode
      CAN gateway 24P connector: disconnected
      PCM connector A (51P): disconnected
    Test point 1 CAN gateway 24P connector No. 10
    Test point 2 PCM connector A (51P) No. 12 - Refer to: PCM Connector for Inputs and Outputs (2017 2018 2019 2020), or PCM Connector for Inputs and Outputs (2014 2015), or PCM Connector for Inputs and Outputs (2016)
    GHH316145Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The F-CAN B_L wire is OK. Update the PCM if it does not have the latest software , or substitute a known-good PCM - Refer to: PCM Removal and Installation (2016 2017 2018 2019 2020) or PCM Removal and Installation (2014 2015) , then recheck. If this DTC goes away and the PCM was updated, troubleshooting is complete. If this DTC goes away and the PCM was substituted, replace the original PCM - Refer to: PCM Removal and Installation (2014 2015), or PCM Removal and Installation (2016 2017 2018 2019 2020) .

    NO 

    Repair an open in the F-CAN B_L wire between the CAN gateway and the PCM.

  8. Open wire check (F-CAN A_H line)

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

    - 2. Disconnect the following connectors.

    CAN gateway 24P connector
    TCM 58P connector

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

    Test condition Vehicle OFF (LOCK) mode
      CAN gateway 24P connector: disconnected
      TCM 58P connector: disconnected
    Test point 1 CAN gateway 24P connector No. 14
    Test point 2 TCM 58P connector No. 34
    GHH316146Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The F-CAN A_H wire is OK. Go to step 9.

    NO 

    Repair an open in the F-CAN A_H wire between the CAN gateway and the TCM.

  9. Open wire check (F-CAN A_L line)

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

    Test condition Vehicle OFF (LOCK) mode
      CAN gateway 24P connector: disconnected
      TCM 58P connector: disconnected
    Test point 1 CAN gateway 24P connector No. 15
    Test point 2 TCM 58P connector No. 47
    GHH316147Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The F-CAN A_L wire is OK. Update the TCM if it does not have the latest software , or substitute a known-good TCM , then recheck. If this DTC goes away and the TCM was updated, troubleshooting is complete. If this DTC goes away and the TCM was substituted, replace the original TCM .

    NO 

    Repair an open in the F-CAN A_L wire between the CAN gateway and the TCM.

  10. Open wire check (F-CAN B_H line)

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

    - 2. Disconnect the following connectors.

    CAN gateway 24P connector
    TCM 58P connector

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

    Test condition Vehicle OFF (LOCK) mode
      CAN gateway 24P connector: disconnected
      TCM 58P connector: disconnected
    Test point 1 CAN gateway 24P connector No. 11
    Test point 2 TCM 58P connector No. 7
    GHH316148Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The F-CAN B_H wire is OK. Go to step 11.

    NO 

    Repair an open in the F-CAN B_H wire between the CAN gateway and the TCM.

  11. Open wire check (F-CAN B_L line)

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

    Test condition Vehicle OFF (LOCK) mode
      CAN gateway 24P connector: disconnected
      TCM 58P connector: disconnected
    Test point 1 CAN gateway 24P connector No. 10
    Test point 2 TCM 58P connector No. 20
    GHH316149Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The F-CAN B_L wire is OK. Update the TCM if it does not have the latest software , or substitute a known-good TCM , then recheck. If this DTC goes away and the TCM was updated, troubleshooting is complete. If this DTC goes away and the TCM was substituted, replace the original TCM .

    NO 

    Repair an open in the F-CAN B_L wire between the CAN gateway and the TCM.

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