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

  • Power management control ECU

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.


    NEXT

  2. CHECK FOR DTC


    1. Turn the power 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 POWER MANAGEMENT CONTROL ECU


    1. Check if the part number of the power management control ECU installed to the vehicle is correct.

      OK
      Part number is correct.

    OK

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH Click here

    NG

    REPLACE POWER MANAGEMENT CONTROL ECU Click here