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AUTOMATIC HIGH BEAM SYSTEM, Diagnostic DTC:B124C

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

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

(Detected for 2 seconds or more)

  • Lane departure warning camera

  • Main body ECU (multiplex network body ECU)
Table 1. *1 Lane Departure Warning Camera *2 Main Body ECU (Multiplex Network Body ECU) *3 CAN Communication Line
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

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

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  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

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PROCEDURE


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    CHECK FOR DTC (AUTOMATIC HIGH BEAM SYSTEM)


    1. Clear the DTCs.

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      1. Body Electrical > Main Body > Clear DTCs


    2. Check for DTCs.

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      1. Body Electrical > Main Body > Trouble Codes


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

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    CHECK FOR DTC (LANE DEPARTURE ALERT SYSTEM)


    1. Check for DTCs.

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      1. Chassis > Lane Departure Alert > Trouble Codes


      OK
      Lane departure alert system DTCs are not output.
      Result
      Proceed to
      OK
      NG

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    CHECK LANE DEPARTURE WARNING CAMERA


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

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    2. Check for DTCs.

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      1. Body Electrical > Main Body > Trouble Codes


      OK
      DTC B124C is not output.
      Result
      Proceed to
      OK
      NG

    • OK

      END (LANE DEPARTURE WARNING CAMERA WAS DEFECTIVE)

    • NG

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