LIGHTING SYSTEM(for LED Headlight), Diagnostic DTC:B2456

DTC Code DTC Name
B2456 Left Headlight ECU Variation Error

DESCRIPTION

This DTC is stored when a No. 1 headlight ECU sub-assembly LH which is not compatible with the vehicle has been installed. The No. 1 headlight ECU sub-assembly LH stores DTC B2456.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Note
B2456 Left Headlight ECU Variation Error Incompatible No. 1 headlight ECU sub-assembly LH is installed

  • ECM

  • Main body ECU (multiplex network body ECU)

  • No. 1 headlight ECU sub-assembly LH

 No. 1 headlight ECU sub-assembly LH -

CAUTION / NOTICE / HINT

Note

If the No. 1 headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the No. 1 headlight ECU sub-assembly LH.

Click here

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs.

      Click here

    2. Turn the ignition switch to ON.

    3. Check for DTCs.

      Click here

      OK
      DTC B2456 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  2. CHECK ECM


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

      OK
      Part number is correct.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ECM for 1GR-FE: REPLACE ECM Click here
    REPLACE ECM for 2TR-FE: REPLACE ECM Click here
    REPLACE ECM for 1KD-FTV: REPLACE ECM Click here
    REPLACE ECM for 1GD-FTV: REPLACE ECM Click here

    OK

  3. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


    1. Check if the part number of the main body ECU (multiplex network body ECU) installed to the vehicle is correct.

      OK
      Part number is correct.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH Click here

    NG

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here