AUTOMATIC HIGH BEAM SYSTEM, Diagnostic DTC:B124B

DTC Code DTC Name
B124B Automatic High Beam System

DESCRIPTION

When DTCs for the following systems are stored, this DTC is stored simultaneously.


DTC No. DTC Detection Condition Trouble Area
B124B

Malfunction in automatic high beam system

(Detected for 2 seconds or more)

  • Lane departure alert system

  • Lane departure warning camera

  • Main body ECU (multiplex network body ECU)

  • CAN communication system

WIRING DIAGRAM

A01I1WWE01

INSPECTION PROCEDURE

Note

Confirm that the CAN communication system is not malfunctioning before performing the following inspection Click here.

PROCEDURE


  1. CHECK FOR DTC (AUTOMATIC HIGH BEAM SYSTEM)


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      DTC B124B is not output.

    NG

    CHECK FOR DTC (LANE DEPARTURE ALERT SYSTEM) Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  2. CHECK FOR DTC (LANE DEPARTURE ALERT SYSTEM)


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      Lane departure alert system DTCs are not output A
      Lane departure alert system DTCs are output B
      CAN communication system DTCs are output C

    B

    GO TO LANE DEPARTURE ALERT SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  3. INSPECT LANE DEPARTURE ALERT WARNING


    1. Check if a lane departure alert system warning message is displayed on the multi-information display.

      OK
      No lane departure alert system warning message are displayed.

    NG

    REPLACE LANE DEPARTURE WARNING CAMERA Click here

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here