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Home >> Honda >> 2021 >> CR-V EX-L, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 60 (Battery Management System - DTC Diagnostics (Hybrid)) >> DTC Troubleshooting >> DTC U0038 (99) (Battery Condition Monitor Module)

DTC U0038 (99) (Battery Condition Monitor Module)

WARNING: This page is about a different variant/trim than selected.

DTC U0038  : EP-CAN Malfunction (Battery Condition Monitor Module Bus-Off)

NOTE:  Before you troubleshoot, review the general troubleshooting information .

DTC Description Confirmed DTC Pending DTC Freeze Frame
U0038 EP-CAN Malfunction (Battery Condition Monitor Module Bus-Off)      

DTC (Electric Powertrain)

  1. Problem verification

    -1. Turn the vehicle to the ON mode.

    -2. Clear the DTC with the HDS.

    -3. Turn the vehicle to the OFF (LOCK) mode.

    -4. Turn the vehicle to the ON mode, and wait 6 seconds.

    -5. Check for Pending or Confirmed DTCs with the HDS.

    DTC Description Confirmed DTC Pending DTC Freeze Frame
    U0038 EP-CAN Malfunction (Battery Condition Monitor Module Bus-Off)      

    Is DTC U0038 indicated?

    YES 

    The failure is duplicated. Go to step 2.

    NO 

    Intermittent failure. The system is OK at this time. 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. Shorted unit check (PCM)

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

    -2. Jump the SCS line with the HDS, and wait more than 1 minute.

    -3. Disconnect the following connector.

    PCM connector A (50P)

    -4. Turn the vehicle to the ON mode.

    -5. Clear the DTC with the HDS.

    -6. Turn the vehicle to the OFF (LOCK) mode.

    -7. Turn the vehicle to the ON mode, and wait 6 seconds.

    -8. Check for Pending or Confirmed DTCs with the HDS.

    DTC Description Confirmed DTC Pending DTC Freeze Frame
    U0038 EP-CAN Malfunction (Battery Condition Monitor Module Bus-Off)      

    Is DTC U0038 indicated?

    YES 

    Go to step 3.

    NO 

    Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM .

  3. Shorted unit check (PCU)

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

    -2. Do the 12 volt battery terminal disconnection procedure .

    -3. Disconnect the following connector.

    PCU 33P connector

    -4. Turn the vehicle to the ON mode.

    -5. Clear the DTC with the HDS.

    -6. Turn the vehicle to the OFF (LOCK) mode.

    -7. Turn the vehicle to the ON mode, and wait 6 seconds.

    -8. Check for Pending or Confirmed DTCs with the HDS.

    DTC Description Confirmed DTC Pending DTC Freeze Frame
    U0038 EP-CAN Malfunction (Battery Condition Monitor Module Bus-Off)      

    Is DTC U0038 indicated?

    YES 

    Go to step 4.

    NO 

    Replace the PCU .

  4. Shorted unit check (SBW shifter control module)

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

    -2. Disconnect the following connector.

    SBW shifter control module 20P connector

    -3. Turn the vehicle to the ON mode.

    -4. Clear the DTC with the HDS.

    -5. Turn the vehicle to the OFF (LOCK) mode.

    -6. Turn the vehicle to the ON mode, and wait 6 seconds.

    -7. Check for Pending or Confirmed DTCs with the HDS.

    DTC Description Confirmed DTC Pending DTC Freeze Frame
    U0038 EP-CAN Malfunction (Battery Condition Monitor Module Bus-Off)      

    Is DTC U0038 indicated?

    YES 

    Go to step 5.

    NO 

    Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good SBW shifter assembly .

  5. Shorted unit check (park pawl actuator driver unit)

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

    -2. Disconnect the following connector.

    Park pawl actuator driver unit 26P connector

    -3. Turn the vehicle to the ON mode.

    -4. Clear the DTC with the HDS.

    -5. Turn the vehicle to the OFF (LOCK) mode.

    -6. Turn the vehicle to the ON mode, and wait 6 seconds.

    -7. Check for Pending or Confirmed DTCs with the HDS.

    DTC Description Confirmed DTC Pending DTC Freeze Frame
    U0038 EP-CAN Malfunction (Battery Condition Monitor Module Bus-Off)      

    Is DTC U0038 indicated?

    YES 

    Go to step 6.

    NO 

    Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good park pawl actuator driver unit .

  6. Shorted wire check (EP-CAN A_H line)

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

    -2. Remove the service plug and the IPU cover .

    -3. Disconnect the following connector.

    Battery condition monitor module connector E (32P)

    -4. Measure the resistance between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      PCM connector A (50P): disconnected
      PCU 33P connector: disconnected
      Battery condition monitor module connector E (32P): disconnected
      SBW shifter control module 20P connector: disconnected
      Park pawl actuator driver unit 26P connector: disconnected
    Test point 1 Battery condition monitor module connector E (32P) No. 11
    Test point 2 Body ground

    Is there 1 MΩ or more?

    YES 

    Go to step 7.

    NO 

    Repair a short to ground in the EP-CAN A_H wire between the PCM, the PCU, the SBW shifter control module, the park pawl actuator driver unit, and the battery condition monitor module.

  7. Shorted wire check (EP-CAN A_L line)

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

    Test condition Vehicle OFF (LOCK) mode
      PCM connector A (50P): disconnected
      PCU 33P connector: disconnected
      Battery condition monitor module connector E (32P): disconnected
      SBW shifter control module 20P connector: disconnected
      Park pawl actuator driver unit 26P connector: disconnected
    Test point 1 Battery condition monitor module connector E (32P) No. 10
    Test point 2 Body ground

    Is there 1 MΩ or more?

    YES 

    Go to step 8.

    NO 

    Repair a short to ground in the EP-CAN A_L wire between the PCM, the PCU, the SBW shifter control module, the park pawl actuator driver unit, and the battery condition monitor module.

  8. Shorted wire check (EP-CAN A_H wire to EP-CAN A_L wire)

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

    Test condition Vehicle OFF (LOCK) mode
      PCM connector A (50P): disconnected
      PCU 33P connector: disconnected
      Battery condition monitor module connector E (32P): disconnected
      SBW shifter control module 20P connector: disconnected
      Park pawl actuator driver unit 26P connector: disconnected
    Test point 1 Battery condition monitor module connector E (32P) No. 11
    Test point 2 Battery condition monitor module connector E (32P) No. 10

    Is there 1 MΩ or more?

    YES 

    The EP-CAN A_H wire and the EP-CAN A_L wire are OK. Replace the battery condition monitor module .

    NO 

    Repair a short in the EP-CAN A_H wire to the EP-CAN A_L wire between the PCM, the SBW shifter control module, the park pawl actuator driver unit, the PCU, and the battery condition monitor module.

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