AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM, Diagnostic DTC:B2451

DTC Code DTC Name
B2451 Variation Code not Written

DESCRIPTION

The No. 1 headlight ECU sub-assembly LH stores this DTC if the vehicle specifications have not been stored in the ECU. The No. 1 headlight ECU sub-assembly LH stores DTC B2451.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B2451 Variation Code not Written Vehicle specifications have not been stored 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. SYNCHRONIZE VEHICLE INFORMATION


    1. Synchronize the vehicle information.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  2. CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / HL AutoLeveling*1 or AHS*2 / Trouble Codes.


      • *1: w/o Adaptive High Beam System

      • *2: w/ Adaptive High Beam System

    5. Clear the DTCs.


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

    NEXT

  3. CHECK FOR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / HL AutoLeveling*1 or AHS*2 / Trouble Codes.


      • *1: w/o Adaptive High Beam System

      • *2: w/ Adaptive High Beam System

    5. Check for DTCs.


      Body Electrical > HL AutoLeveling > Trouble Codes
      Body Electrical > AHS > Trouble Codes
      OK
      DTC B2451 is not output.

      Tech Tips

      If the No. 1 headlight ECU sub-assembly LH stores DTC B2451 even though initialization has been performed, the No. 1 headlight ECU sub-assembly LH may be malfunctioning.

      Result
      Proceed to
      OK
      NG

    OK

    END (VEHICLE SPECIFICATIONS WERE NOT STORED)

    NG

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