AUTOMATIC HIGH BEAM SYSTEM, Diagnostic DTC:B124C

DTC Code DTC Name
B124C Automatic High Beam Camera

DESCRIPTION


The main body ECU (multiplex network body ECU) detects automatic high beam system high beam illumination request signals from the forward recognition camera*1 or inner rear view mirror assembly*2.

DTC No. DTC Detection Condition Trouble Area
B124C Malfunction detected in forward recognition camera*1 or inner rear view mirror assembly*2

  • Forward recognition camera system*1

  • Inner rear view mirror assembly*2

WIRING DIAGRAM

B0018NNE07
w/o Pre-crash Safety System
*1 Inner Rear View Mirror Assembly
*2 Main Body ECU (Multiplex Network Body ECU)
*3 CAN Communication Line
B0018NNE08
w/ Pre-crash Safety System
*1 Forward Recognition Camera
*2 Main Body ECU (Multiplex Network Body ECU)
*3 CAN Communication Line

CAUTION / NOTICE / HINT

Note

First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CAN communication malfunctions before troubleshooting this symptom Click here.

PROCEDURE


  1. CHECK VEHICLE TYPE


    1. Check the vehicle type.

      Result
      Result Proceed to
      w/ Pre-crash Safety System A
      w/o Pre-crash Safety System B

    B

    CHECK FOR DTC Click here

    A

  2. CHECK FORWARD RECOGNITION CAMERA SYSTEM


    1. Check the forward recognition camera system Click here.


    NEXT

    END

  3. CHECK FOR DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B124C is output A
      DTC B124C are not output B

    A

    REPLACE INNER REAR VIEW MIRROR ASSEMBLY Click here

    B

    USE SIMULATION METHOD TO CHECK Click here