LIGHTING SYSTEM Automatic High Beam System does not Operate or Operation Indicator does not Illuminate

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the automatic high beam system based on signals received from the forward recognition camera.

WIRING DIAGRAM

B004ALNE02

CAUTION / NOTICE / HINT

Note


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

  • When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

  • When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.

  • If the forward recognition camera has been replaced with a new one, be sure to perform Forward Recognition Camera Learning.

    Click here

PROCEDURE


  1. CHECK AUTOMATIC HIGH BEAM INDICATOR LIGHT


    1. Check the operation of the automatic high beam indicator light.


      • Turn the power switch on (IG).

      • Turn the light control switch to the AUTO or head position.

      • Turn the headlight dimmer switch to the high position.

      • Turn the automatic high beam main switch on.

      OK
      Automatic high beam indicator light illuminate.
      Result
      Proceed to
      OK
      NG

    NG

    READ VALUE USING GTS Click here

    OK

  2. READ VALUE USING GTS


    1. Using the GTS, read the Data List.

      Click here


      1. B004BBUC01
        *1 Forward Recognition Camera (Automatic High Beam Sensor)
        *2 Work Light or Equivalent
        *a 100 mm (3.94 in.) or less

        Shine a light on the automatic high beam sensor*.

        Tech Tips

        *: If troubleshooting is being performed in a bright area, such as outside on a sunny day, it will not be necessary to perform this step.


        Body Electrical > Main Body > Data List
        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        Auto H Beam STS0 Automatic high beam sensor state past 0 Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin, LIN Err Condition can be displayed -

        Body Electrical > Main Body > Data List
        Tester Display
        Auto H Beam STS0
        OK
        The Data List value displays ""Daytime".
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FORWARD RECOGNITION CAMERA Click here

    OK

  3. READ VALUE USING GTS


    1. Using the GTS, read the Data List.

      Click here


      1. B004BWMC01
        *1 Cardboard or Equivalent Object
        *a 150 mm (5.91 in.) or higher
        *b 3 mm (0.118 in.) or higher

        Cover the automatic high beam sensor with an opaque object, such as cardboard.

        Note


        • Make sure that there is no clearance between the cardboard or equivalent object and the area of the windshield glass in front of the automatic high beam sensor.

        • If there is any clearance, light may shine on the automatic high beam sensor and the value of the Data List will not change.


        Body Electrical > Main Body > Data List
        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        Auto H Beam STS0 Automatic high beam sensor state past 0 Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin, LIN Err Condition can be displayed -

        Body Electrical > Main Body > Data List
        Tester Display
        Auto H Beam STS0
        OK
        The Data List value displays ""Speed".
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE FORWARD RECOGNITION CAMERA Click here

  4. READ VALUE USING GTS


    1. Using the GTS, read the Data List.

      Click here


      Chassis > Steering Angle Sensor > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Auto High Beam Main Switch Automatic high beam main switch signal OFF or ON

      OFF: Automatic high beam main switch off

      ON: Automatic high beam main switch on

      		 -

      Chassis > Steering Angle Sensor > Data List
      Tester Display
      Auto High Beam Main Switch
      OK
      Normal condition listed above is displayed.
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT TURN SIGNAL SWITCH Click here

    OK

  5. READ VALUE USING GTS


    1. Using the GTS, read the Data List.

      Click here


      Body Electrical > Main Body > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Auto H Beam STS0 Automatic high beam sensor state past 0 Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin, LIN Err Condition can be displayed -

      Body Electrical > Main Body > Data List
      Tester Display
      Auto H Beam STS0
      OK
      The Data List value displays "Daytime" or "Speed".
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FORWARD RECOGNITION CAMERA Click here

    OK

  6. PERFORM ACTIVE TEST USING GTS


    1. Perform the Active Test according to the display on the GTS.

      Click here


      Body Electrical > Combination Meter > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Automatic High Beam Indicator Automatic high beam indicator light OFF or ON -

      Body Electrical > Combination Meter > Active Test
      Tester Display
      Automatic High Beam Indicator
      OK
      Automatic high beam indicator light illuminate.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

  7. INSPECT TURN SIGNAL SWITCH


    1. Remove the turn signal switch.

      Click here

    2. Inspect the turn signal switch.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE TURN SIGNAL SWITCH Click here

    OK

  8. INSPECT STEERING WHEEL SWITCH HOUSING


    1. Remove the steering wheel switch housing.

      Click here

    2. Inspect the steering wheel switch housing.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STEERING SENSOR Click here

    NG

    REPLACE STEERING WHEEL SWITCH HOUSING Click here