Lexus ES: Variation Code not Written (B2451)
DESCRIPTION
The headlight ECU sub-assembly LH stores this DTC if the vehicle specifications have not been stored.
for LED Type Turn Signal Light| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | DTC Output from |
|---|---|---|---|---|
| B2451 | Variation Code not Written |
| Headlight ECU sub-assembly LH | AFS |
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | DTC Output from |
|---|---|---|---|---|
| B2451 | Variation Code not Written |
| Headlight ECU sub-assembly LH | HL AutoLeveling |
CAUTION / NOTICE / HINT
NOTICE:
-
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.*1
Click here
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-
If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.*2
Click here
-
When replacing the headlight ECU sub-assembly LH, always replace it with a new one. If a headlight ECU sub-assembly LH which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
- *1: for LED Type Turn Signal Light
- *2: for Bulb Type Turn Signal Light
PROCEDURE
| 1. | SYNCHRONIZE VEHICLE INFORMATION |
(a) Synchronize the vehicle information.
Click here
|
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| 2. | CONFIRM MODEL |
(a) Choose the model to be inspected.
| Result | Proceed to |
|---|---|
| for LED Type Turn Signal Light | A |
| for Bulb Type Turn Signal Light | B |
| B | .gif) | GO TO STEP 5 |
|
| 3. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / AFS / Trouble Codes.
(e) Clear the DTCs.
Body Electrical > AFS > Clear DTCs
|
| 4. | CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / AFS / Trouble Codes.
(e) Check for DTCs.
Body Electrical > AFS > Trouble CodesOK:
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 |
| 5. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine 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
|
| 6. | CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine 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 CodesOK:
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 |
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SEE MORE:
Initialization
INITIALIZATION CHANGE GRILLE SHUTTER CONTROL MODE AND/OR PERFORM INITIALIZATION (a) In the following situations, it is necessary to change the grille shutter control mode and/or initialize the grille shutter system. Change Control Mode (Normal Mode → Maintenance Mode) Change Control Mo
Removal
REMOVAL PROCEDURE 1. REMOVE REAR SEAT CUSHION ASSEMBLY Click here 2. REMOVE REAR SEAT CUSHION LOCK HOOK Click here 3. REMOVE REAR DOOR SCUFF PLATE LH Click here 4. REMOVE REAR UNDER SIDE COVER LH (a) Remove the 2 clips (A). *a Clip (A) *b Clip (B) *c Clip (C)
