HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A1F94

DTC Code DTC Name
P0A1F94 Hybrid/EV Battery Energy Control Module Unexpected Operation

DTC SUMMARY


  1. MALFUNCTION DESCRIPTION

    The hybrid vehicle control ECU (main CPU) monitors the battery ECU assembly.

    The cause of this malfunction may be the following:


      Battery ECU assembly internal malfunction

    • Battery ECU assembly malfunction

DESCRIPTION

The hybrid vehicle control ECU (main CPU) monitors the battery ECU assembly and stores this DTC when it detects a malfunction.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0A1F94 Hybrid/EV Battery Energy Control Module Unexpected Operation

The battery ECU assembly value received by the hybrid vehicle control ECU (main CPU) exceeds the threshold for a certain period of time.

(1 trip detection logic)

 Battery ECU assembly 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. Turn the power switch on (READY) and wait for 10 seconds or more.

  7. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.

  8. Read the current DTCs.

    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 DTC OUTPUT (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

    4. Check for DTCs.


      Powertrain > Hybrid Control > Trouble Codes
      Result
      Proceed to
      P0A1F94 only is output.
      DTCs except P0A1F94 are output.

    5. Turn the power switch off.


    P0A1F94 only is output.

    REPLACE BATTERY ECU ASSEMBLY Click here

    DTCs except P0A1F94 are output.

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here