LIGHTING 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. The headlight ECU sub-assembly LH stores DTC B2456.

DTC Code DTC Detection Condition Trouble Area
B2456 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 Click here.

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  2. CHECK FOR DTC


    1. Turn the engine switch on (IG).

    2. Check for DTCs Click here.

      OK
      DTC B2456 is not output.

    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 1VD-FTV) B
      NG (for 3UR-FE) C

    A

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH Click here

    B

    REPLACE ECM WITH CORRECT ONE Click here

    C

    REPLACE ECM WITH CORRECT ONE Click here