AUTOMATIC HIGH BEAM SYSTEM, Diagnostic DTC:B124A, B124C

DTC Code DTC Name
B124A Automatic High Beam Mirror
B124C Automatic High Beam Camera

DESCRIPTION

This DTC is stored when the main body ECU (multiplex network body ECU) detects a malfunction in the lane departure warning camera.

DTC No. Detection Item DTC Detection Condition Trouble Area
B124A Automatic High Beam Mirror Malfunction in lane departure warning camera (automatic high beam sensor)

  • CAN communication system

  • Lane departure warning camera

  • Main body ECU (multiplex network body ECU)
B124C Automatic High Beam Camera Malfunction in lane departure warning camera (automatic high beam sensor)

  • CAN communication system

  • Lane departure warning camera

  • Main body ECU (multiplex network body ECU)

WIRING DIAGRAM

B0059XQE06
*1 Lane Departure Warning Camera
*2 Network Gateway ECU
*3 Main Body ECU (Multiplex Network Body ECU)
*4 CAN Communication Line

CAUTION / NOTICE / HINT

Note


  • Confirm that there are no CAN communication system malfunctions before performing the following inspection.

    for LHD:

    Click here

    for RHD:

    Click here

  • If the main body ECU (multiplex network body ECU) is replaced, refer to Registration.

  • As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (multiplex network body ECU) before performing this troubleshooting procedure.*

    *: w/ Door Control Battery

  • When the lane departure warning camera is replaced with a new one, adjustment of the lane departure warning camera beam axis must be performed.

PROCEDURE


  1. CHECK FOR DTC (AUTOMATIC HIGH BEAM SYSTEM)


    1. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Clear DTCs

    2. Check for DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      Result
      Result Proceed to
      DTCs B124A or B124C are not output A
      DTCs B124A or B124C are output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE LANE DEPARTURE WARNING CAMERA Click here