AUTOMATIC HIGH BEAM SYSTEM, Diagnostic DTC:B124C

DTC Code DTC Name
B124C Automatic High Beam Camera

DESCRIPTION

The main body ECU (instrument panel junction block assembly) detects automatic high beam system high beam illumination request signals from the pre-collision city sensor.

DTC No. DTC Detection Condition Trouble Area
B124C Malfunction detected in pre-collision city sensor

  • Pre-collision city sensor

  • Main body ECU (instrument panel junction block assembly)

WIRING DIAGRAM

A002NEDE01
*1 Pre-collision City Sensor
*2 Main Body ECU (Instrument Panel Junction Block Assembly)
*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 problem Click here.

  • When replacing the pre-collision city sensor, replace it with a new one and be sure to initialize the settings. If an ECU which was installed to another vehicle is used, the information stored in the pre-collision city sensor will not match the information from the vehicle and, as a result, a DTC may be output.

  • When the pre-collision city sensor is replaced with a new one or it is removed, camera beam axis learning must be performed.

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs Click here.

      OK
      B124C is not output.

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  3. CHECK PRE-COLLISION SYSTEM


    1. Check that a pre-collision system Click here.

      OK
      Pre-collision system warning not displayed

    OK

    REPLACE PRE-COLLISION CITY SENSOR Click here

    NG

    GO TO PRE-COLLISION SYSTEM Click here