DTC B2451: Variation Code not Written [10/2018 - ]: Procedure

1. Synchronize the vehicle information.

   Refer to INITIALIZATION [10/2018 - 10/2020] Refer to INITIALIZATION [10/2020 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   for Triple Beam Headlight	A
   for Single Beam Headlight	B

Result: 

B 

See step  5

Result: 

A 

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 / AFS / Trouble Codes.
5. Clear the DTCs.

   Body Electrical > AFS > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. Enter the following menus: Body Electrical / AFS / Trouble Codes.
2. Check for DTCs.

   Body Electrical > AFS > Trouble Codes 

   OK

   DTC B2451 is not output.

   HINT: 

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

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (VEHICLE SPECIFICATIONS WERE NOT STORED) 

Result: 

NG 

REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [10/2018 - ] 

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. Clear the DTCs.

   Body Electrical > HL AutoLeveling > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  6

1. Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.
2. Check for DTCs.

   Body Electrical > HL AutoLeveling > Trouble Codes 

   OK

   DTC B2451 is not output.

   HINT: 

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

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (VEHICLE SPECIFICATIONS WERE NOT STORED) 

Result: 

NG 

REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [10/2018 - ]