LIGHTING SYSTEM, Diagnostic DTC:B2456

DTC Code DTC Name
B2456 Left Headlight ECU Variation Error

DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Note
B2456 Left Headlight ECU Variation Error

    Detection condition:

  • Power switch on (IG)


    Malfunction status:

  • Vehicle specification information received via CAN communication is continuously mismatched


    Malfunction duration:

  • -

  • Hybrid vehicle control ECU assembly

  • Main body ECU (multiplex network body ECU)

  • Headlight ECU sub-assembly LH

 Headlight ECU sub-assembly LH -

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

  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > AFS > Clear DTCs

    2. Turn the power switch on (IG).

    3. Check for DTCs.

      Click here


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

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  2. CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY


    1. Check if the part number of the hybrid vehicle control ECU assembly installed to the vehicle is correct.

      OK
      Part number is correct.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 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 HEADLIGHT ECU SUB-ASSEMBLY LH Click here

    NG

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