DTC B2451: Variation Code not Written [11/2018 - 12/2021]: Procedure

1. Synchronize the vehicle information.

   Refer to INITIALIZATION [11/2018 - 12/2021]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / HL AutoLeveling / Clear DTCs.
5. Clear the DTCs.

   Body Electrical > HL AutoLeveling > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.
5. Check for DTCs.

   Body Electrical > HL AutoLeveling > Trouble Codes 

   OK

   DTC B2451 is not output.

   HINT: 

   If the headlight ECU sub-assembly LH stores DTC B2451 even though the vehicle information has been synchronized, the headlight ECU sub-assembly LH may be malfunctioning.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (VEHICLE SPECIFICATIONS WERE NOT STORED) 

Result: 

NG 

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [11/2018 - 02/2019]  , or refer to  REMOVAL [02/2019 - 12/2021]