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 > Black Out Tape(for Front Door): Removal
REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during the black out tape removal/installation are shown below. Necessary Procedure After Parts Removed/ ...

Toyota CH-R Service Manual > Navigation System: Microphone Circuit
DESCRIPTION The radio and display receiver assembly, map light assembly and telephone microphone assembly are connected to each other using the microphone connection detection signal lines. Using this circuit, the DCM (telematics transceiver) sends power to the map light assembly and telepho ...

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