AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM, Diagnostic DTC:B2456

DTC Code DTC Name
B2456 Left Headlight ECU Variation Error

DESCRIPTION

This DTC is stored when a headlight ECU sub-assembly LH which is not compatible with the vehicle has been installed.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B2456 Left Headlight ECU Variation Error Incompatible headlight ECU sub-assembly LH is installed

  • Headlight ECU sub-assembly LH

  • ECM

 -

CAUTION / NOTICE / HINT

Note

If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight ECU sub-assembly LH.

Click here

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > HL AutoLeveling > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  2. CHECK FOR DTC


    1. Turn the ignition switch to ON.

    2. Check for DTCs.

      Click here


      Body Electrical > HL AutoLeveling > Trouble Codes
      OK
      DTC B2456 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  3. CHECK ECM


    1. Check if the part number of the ECM installed to the vehicle is correct.

      OK
      Part number is correct.
      Result
      Result Proceed to
      OK A
      NG (for 8NR-FTS) B
      NG (for 3ZR-FAE) C

    A

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH Click here

    B

    REPLACE ECM Click here

    C

    REPLACE ECM Click here