Toyota Avalon Service & Repair Manual: Variation Code not Written (B2451)

DESCRIPTION

The headlight ECU sub-assembly LH stores this DTC if the vehicle specifications have not been stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B2451

Variation Code not Written

  • The power switch is on (IG).
  • Vehicle specifications have not been stored
  • -

Headlight ECU sub-assembly LH

Headlight ECU sub-assembly LH

CAUTION / NOTICE / HINT

NOTICE:

If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.

Click here

PROCEDURE

1.

SYNCHRONIZE VEHICLE INFORMATION

(a) Synchronize the vehicle information.

Click here

NEXT

2.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs
NEXT

3.

CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.

(e) 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.

OK

END (VEHICLE SPECIFICATIONS WERE NOT STORED)

NG

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

    Headlight LH Circuit (B2439,B243A)

    Left Headlight ECU Variation Error (B2456)

    See More:

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