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 ...

Other materials:

Toyota CH-R Service Manual > Smart Key System(for Entry Function): Open in Outside Luggage Compartment Electrical Key Antenna Circuit (B27A8)
DESCRIPTION The certification ECU (smart key ECU assembly) generates a request signal and transmits the signal to the electrical key antenna (outside luggage compartment). For the electrical key antenna (outside luggage compartment) to detect when the electrical key transmitter sub-assembly i ...

Toyota CH-R Service Manual > Audio And Visual System(for Radio Receiver Type): Registered Device cannot be Deleted
PROCEDURE 1. DELETE OPERATION (a) Check if a registered portable player can be deleted normally. OK: Registered portable player can be deleted normally. OK END NG PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYM ...

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) 2023-2026 Owner's Manual

Toyota CH-R Owners Manual

Toyota CH-R Service Manual