Toyota CH-R Service Manual: Left Headlight ECU Variation Error (B2456)

Toyota CH-R Service Manual / Lighting (ext) / Automatic Headlight Beam Level Control System / Left Headlight ECU Variation Error (B2456)

DESCRIPTION

This DTC is stored when a headlight ECU sub-assembly LH which is not compatible with the vehicle has been installed.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
B2456	Left Headlight ECU Variation Error	Incompatible headlight ECU sub-assembly LH is installed	Headlight ECU sub-assembly LH ECM	-

CAUTION / NOTICE / HINT

NOTICE:

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.

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PROCEDURE

CLEAR DTC

(a) Clear the DTCs.

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Body Electrical > HL AutoLeveling > Clear DTCs

2.	CHECK FOR DTC

(a) Turn the ignition switch to ON.

(b) Check for DTCs.

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Body Electrical > HL AutoLeveling > Trouble Codes

OK:

DTC B2456 is not output.

USE SIMULATION METHOD TO CHECK

CHECK ECM

(a) Check if the part number of the ECM installed to the vehicle is correct.

OK:

Part number is correct.

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

REPLACE ECM

Height Control Sensor Data Out of Range When Initializing (B2452)

DESCRIPTION The headlight ECU sub-assembly LH stores this DTC if the sensor value received from the rear height control sensor sub-assembly LH is out of range when performing initialization of th ...

Vehicle Specifications have not been Stored (B2451)

DESCRIPTION The headlight ECU sub-assembly LH stores this DTC if the vehicle specifications have not been stored in the ECU. DTC No. Detection Item DTC Detection C ...

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Toyota CH-R Service Manual: Left Headlight ECU Variation Error (B2456)

Height Control Sensor Data Out of Range When Initializing (B2452)

Vehicle Specifications have not been Stored (B2451)

Other materials:

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Toyota CH-R Service Manual