Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: Variation Code not Written (B2451)
DESCRIPTION
The No. 1 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 |
| No. 1 headlight ECU sub-assembly LH | AFS |
CAUTION / NOTICE / HINT
NOTICE:
-
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
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-
If the headlight 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
- When replacing the No. 1 headlight ECU sub-assembly LH, always replace it with a new one. If a No. 1 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.
-
When replacing the headlight assembly LH, always replace it with a new one. If a headlight 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.*
- *: for TMMC Made
PROCEDURE
| 1. | SYNCHRONIZE VEHICLE INFORMATION |
(a) Synchronize the vehicle information.
Click here
|
.gif)
| 2. | 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
|
| 3. | 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 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.
| OK | .gif) | END (VEHICLE SPECIFICATIONS WERE NOT STORED) |
| NG | | REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH |
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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