Toyota CH-R Service Manual: Vehicle Specifications have not been Stored (B2451)

Toyota CH-R Service Manual / Lighting (ext) / Lighting System / Vehicle Specifications have not been Stored (B2451)

DESCRIPTION

This DTC is output if the vehicle variation information is not written to the headlight ECU sub-assembly LH.

The headlight ECU sub-assembly LH outputs DTC B2451.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
B2451	Vehicle Specifications have not been Stored	Vehicle specification information not written	Headlight ECU sub-assembly LH	-

CAUTION / NOTICE / HINT

NOTICE:

After the headlight ECU sub-assembly LH is replaced, vehicle information registration and initialization are necessary.

Click here

PROCEDURE

1.	VEHICLE INFORMATION HEADLIGHT ECU SUB-ASSEMBLY LH

(a) Register vehicle information for the headlight ECU sub-assembly LH.

Click here

CLEAR DTC

(a) Clear the DTCs.

Click here

Body Electrical > HL AutoLeveling > Clear DTCs

3.	CHECK FOR DTC

(a) Turn the ignition switch to ON.

(b) Turn on the headlights using the light control switch.

Click here

Body Electrical > HL AutoLeveling > Trouble Codes

Result	Proceed to
DTC B2451 output does not occur	A
DTC B2451 output occurs	B

END (NORMAL AFTER VEHICLE INFORMATION REGISTERED)

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

Open in IG Circuit (B242E)

DESCRIPTION This DTC is stored when a malfunction occurs in the headlight ECU sub-assembly LH IG power source circuit. The headlight ECU sub-assembly LH stores DTC B242E. DTC No. ...

CAN Communication Failure (Message Registry) (U1000)

DESCRIPTION The headlight ECU sub-assembly LH stores this DTC if it detects an internal malfunction related to the CAN communication system. DTC No. Detection Item ...

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Toyota CH-R Service Manual > Smart Key System(for Entry Function): Open in Inside Luggage Compartment Electrical Key Oscillator Circuit (B27A7)
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Toyota CH-R Service Manual: Vehicle Specifications have not been Stored (B2451)

Open in IG Circuit (B242E)

CAN Communication Failure (Message Registry) (U1000)

Other materials:

Toyota C-HR (AX20) 2023-2025 Owner's Manual

Toyota CH-R Owners Manual

Toyota CH-R Service Manual