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DTC U1204 (606), U1603 (602) (Battery Charge Control Module)

DTC U1204  : EP-CAN Malfunction (Battery Charge Control Module - PCM)

DTC U1603  : EP-CAN Malfunction (Battery Charge Control Module - Battery Condition Monitor Module A)

NOTE:
  • Before you troubleshoot, review the general troubleshooting information .
  • According to the detected DTC(s), check for the power circuit and the ground circuit of the control unit which cannot communicate with the battery charge control module.
DTC Description Confirmed DTC Pending DTC Freeze Frame
U1204 EP-CAN Malfunction (Battery Charge Control Module - PCM)      
U1603 EP-CAN Malfunction (Battery Charge Control Module - Battery Condition Monitor Module A)      

DTC (Electric Powertrain)

  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)

    Are any DTCs indicated?

    YES 

    Go to the troubleshooting for CAN gateway system DTC(s) .

    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

    Which result is indicated?

    Bus E is Not Available 

    Go to step 3.

    Bus E is Available 

    Go to step 4.

  3. Open wire check (EPP-CAN A_H line, EPP-CAN A_L line)

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

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

    -3. Disconnect the following connectors.

    CAN gateway 16P connector
    Battery charge control module connector B (40P)

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

    Test condition Vehicle OFF (LOCK) mode
      CAN gateway 16P connector: disconnected
      Battery charge control module connector B (40P): disconnected
    Test point 1 CAN gateway 16P connector (female terminals) No. 16:
    Test point 2 Battery charge control module connector B (40P) No. 2
    Test point 1 CAN gateway 16P connector (female terminals) No. 8:
    Test point 2 Battery charge control module connector B (40P) No. 22
    GHH414947Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The EPP-CAN A_H wire and the EPP-CAN A_L wire are OK. Check for any authorized service information related to the DTC(s) or symptoms you are troubleshooting or substitute a known-good battery charge control module .

    NO 

    Repair an open in the EPP-CAN A_H wire or the EPP-CAN A_L wire between the battery charge control module and the CAN gateway.

  4. Open wire check (EPP-CAN A_H line, EPP-CAN A_L line) 1

    -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).

    NOTE:
    DTC Connector
    - CAN gateway 16P connector
    U1204 PCM connector A (50P)
    U1603 IPU 33P 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 for indicated DTCs: disconnected
    DTC Circuit name Test point 1 Test point 2
    Connector Terminal Connector Terminal
    U1204 EPP-CAN A_H CAN gateway 16P connector (female terminals): No. 16 PCM connector A (50P) No. 21
    EPP-CAN A_L No. 8 No. 20
    U1603 EPP-CAN A_H CAN gateway 16P connector (female terminals): No. 16 IPU 33P connector No. 12
    EPP-CAN A_L No. 8 No. 13
    GHH414950Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES (U1204) 

    The EPP-CAN A_H wire and the EPP-CAN A_L wire are OK. Check for any authorized service information related to the DTC(s) or symptoms you are troubleshooting or substitute a known-good PCM .

    YES (U1603) 

    Go to step 5.

    NO 

    Repair an open in the EPP-CAN A_H wire or the EPP-CAN A_L wire between the PCM and the CAN gateway.

  5. Open wire check (EPP-CAN A_H line, EPP-CAN A_L line) 2

    -1. Remove the IPU .

    -2. Remove the IPU cover .

    -3. Disconnect the following connector.

    Battery condition monitor module A connector G (24P)

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

    Test condition Vehicle OFF (LOCK) mode
      CAN gateway 16P connector: disconnected
      IPU 33P connector: disconnected
      Battery condition monitor module A connector G (24P): disconnected
    Test point 1 IPU 33P connector (male terminals) No. 12:
    Test point 2 Battery condition monitor module A connector G (24P) No. 11
    Test point 1 IPU 33P connector (male terminals) No. 13:
    Test point 2 Battery condition monitor module A connector G (24P) No. 23
    GHH414953Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The EPP-CAN A_H wire and the EPP-CAN A_L wire are OK. Check for any authorized service information related to the DTC(s) or symptoms you are troubleshooting or substitute a known-good battery condition monitor module A .

    NO 

    Repair an open in the EPP-CAN A_H wire or the EPP-CAN A_L wire between the IPU 33P connector and battery condition monitor module A.

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