HYBRID BATTERY SYSTEM, Diagnostic DTC:P0A1D94

DTC Code DTC Name
P0A1D94 Hybrid/EV Powertrain Control Module Unexpected Operation

DESCRIPTION

The battery ECU assembly monitors the hybrid vehicle control ECU via CAN communication. If the battery ECU assembly detects that the hybrid vehicle control ECU is malfunctioning, it will illuminate the MIL and store a DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0A1D94 Hybrid/EV Powertrain Control Module Unexpected Operation

Hybrid vehicle control ECU internal malfunction:

An abnormal signal from the hybrid vehicle control ECU is detected by the battery ECU assembly.

(1 trip detection logic)

 Hybrid vehicle control ECU Comes on

Master Warning Light:

Comes on

CONFIRMATION DRIVING PATTERN

Tech Tips

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click here


  1. Connect the GTS to the DLC3.

  2. Turn the power switch on (IG) and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the power switch off and wait for 2 minutes or more.

  5. Turn the power switch on (IG) and turn the GTS on.

  6. With power switch on (IG) and wait for 2 minutes or more.

  7. Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.

  8. Check the DTC judgment result.

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.

PROCEDURE


  1. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU)


    1. A003OB5

      Check the connections of the hybrid vehicle control ECU connector.

      Click here

      OK
      The connector is connected securely and there are no contact problems.
      Result
      Result
      OK
      NG

    NG

    CONNECT SECURELY

    OK

  2. CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY)

    CAUTION:

    Be sure to wear insulated gloves and protective goggles.


    1. Check that the service plug grip is not installed.

      Note

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Remove the upper hybrid battery cover sub-assembly.

      Click here

    3. B006J82N04

      Check the connections of the t14 battery ECU assembly connector.

      Click here

      OK
      The connector is connected securely and there are no contact problems.

    4. Install the upper hybrid battery cover sub-assembly.

      Result
      Result
      OK
      NG

    NG

    CONNECT SECURELY

    OK

  3. CHECK CONNECTOR CONNECTION CONDITION (NO. 1 HYBRID BATTERY PACK WIRE))

    CAUTION:

    Be sure to wear insulated gloves and protective goggles.


    1. Check that the service plug grip is not installed.

      Note

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Remove the No. 3 HV battery shield panel.

      Click here

    3. B006HVRN03
      *1 Nt1

      Check the connections of the Nt1 No. 1 hybrid battery pack wire connector.

      Click here

      OK
      The connector is connected securely and there are no contact problems.

    4. Install the No. 3 HV battery shield panel.

      Result
      Result
      OK
      NG

    NG

    CONNECT SECURELY

    OK

  4. REPLACE HYBRID VEHICLE CONTROL ECU

    Click here

    Result
    Proceed to
    NEXT

    NEXT

    COMPLETED