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 | Note |
|---|---|---|---|---|---|
| B2451 | Variation Code not Written | Detection condition:
The engine switch is on (IG) Malfunction status:
Vehicle specifications have not been stored Malfunction duration:
- |
Headlight ECU sub-assembly LH | HL AutoLeveling | - |
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.
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.
Synchronize the vehicle information.
| Proceed to |
|---|
| NEXT |
NEXT
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / HL AutoLeveling / Clear DTCs.
Clear the DTCs.
| Proceed to |
|---|
| NEXT |
NEXT
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.
Check for DTCs.
DTC B2451 is not output.
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.
| Proceed to |
|---|
| OK |
| NG |
OK
NG