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.

Click here

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Click here

Body Electrical > HL AutoLeveling > Clear DTCs
NEXT

2.

CHECK FOR DTC

(a) Turn the ignition switch to ON.

(b) Check for DTCs.

Click here

Body Electrical > HL AutoLeveling > Trouble Codes

OK:

DTC B2456 is not output.

OK

USE SIMULATION METHOD TO CHECK

NG

3.

CHECK ECM

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

OK:

Part number is correct.

OK

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

NG

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 ...

    Other materials:

    Toyota CH-R Service Manual > Pre-collision System: Customize Parameters
    CUSTOMIZE PARAMETERS NOTICE: When the customer requests a change in a function, first make sure that the function can be customized. Make a note of the current settings before customizing. HINT: The following PCS functions and the pre-collision system sensitivity setting ...

    Toyota CH-R Service Manual > Smart Key System(for Start Function): Engine does not Start
    DESCRIPTION When the electrical key transmitter sub-assembly is in the cabin and the engine switch is pressed, the certification ECU (smart key ECU assembly) receives a signal and changes the power source mode. Additionally, when the shift lever is in P and the brake pedal is depressed, the e ...

    Toyota CH-R Owners Manual

    Toyota CH-R Service Manual

    © 2017-2025 Copyright www.tochr.net
    0.0121