AUTOMATIC HIGH BEAM SYSTEM, Diagnostic DTC:B124C

DTC Code DTC Name
B124C Automatic High Beam Camera

DESCRIPTION

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

DTC No. DTC Detection Condition Trouble Area
B124C

Malfunction in lane departure warning camera (automatic high beam camera)

(Detected for 2 seconds or more)

  • Lane departure warning camera

  • Driving support ECU assembly*1

  • Main body ECU (multiplex network body ECU)

WIRING DIAGRAM


  1. w/ Dynamic Radar Cruise Control System

    A01G4OEE03

  2. w/o Dynamic Radar Cruise Control System

    A01G4T0E03

INSPECTION PROCEDURE

Note


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

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

PROCEDURE


  1. CHECK FOR DTC (AUTOMATIC HIGH BEAM SYSTEM))


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B124C is not output A

      DTC B124C is output

      (w/ Dynamic Radar Cruise Control System)

      		 B

      DTC B124C is output

      (w/o Dynamic Radar Cruise Control System)

      		 C

    B

    CHECK FOR DTC (LANE DEPARTURE ALERT SYSTEM) Click here

    C

    CHECK FOR DTC (LANE DEPARTURE ALERT SYSTEM) Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  2. CHECK FOR DTC (LANE DEPARTURE ALERT SYSTEM)


    1. Check for DTCs Click here.

      OK
      Lane departure alert system DTCs are not output.

    NG

    GO TO LANE DEPARTURE ALERT SYSTEM Click here

    OK

  3. REPLACE LANE DEPARTURE WARNING CAMERA


    1. Replace the lane departure warning camera with a new or known good one Click here.

    2. Check for DTCs Click here.

      OK
      DTC B124C is not output.

    NG

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

    OK

    END (LANE DEPARTURE WARNING CAMERA WAS DEFECTIVE)

  4. REPLACE DRIVING SUPPORT ECU ASSEMBLY


    1. Replace the driving support ECU assembly with a new or known good one Click here.

    2. Check for DTCs Click here.

      OK
      DTC B124C is not output.

    NG

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

    OK

    END (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE)

  5. CHECK FOR DTC (LANE DEPARTURE ALERT SYSTEM)


    1. Check for DTCs Click here.

      OK
      Lane departure alert system DTCs are not output.

    NG

    GO TO LANE DEPARTURE ALERT SYSTEM Click here

    OK

  6. CHECK LANE DEPARTURE WARNING CAMERA


    1. Replace the lane departure warning camera with a new or known good one Click here.

    2. Check for DTCs Click here.

      OK
      DTC B124C is not output.

    NG

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

    OK

    END (LANE DEPARTURE WARNING CAMERA WAS DEFECTIVE)