AUTOMATIC HIGH BEAM 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

B002JSIE07

CAUTION / NOTICE / HINT

Note


  • 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 combination switch assembly (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. B002KGQC01
        *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 or 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. B002JUIC01
        *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 or 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


      Body Electrical > Main Body > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Auto High Beam Main Switch Combination switch assembly (automatic high beam main switch) signal OFF or ON

      OFF: Combination switch assembly (automatic high beam main switch) off

      ON: Combination switch assembly (automatic high beam main switch) on

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      Auto High Beam Main Switch
      OK
      Normal condition listed above is displayed.
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT COMBINATION SWITCH ASSEMBLY (AUTOMATIC HIGH BEAM MAIN 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 or 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 COMBINATION SWITCH ASSEMBLY (AUTOMATIC HIGH BEAM MAIN SWITCH)


    1. Remove the combination switch assembly (automatic high beam main switch).

      Click here

    2. Inspect the combination switch assembly (automatic high beam main switch).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE COMBINATION SWITCH ASSEMBLY (AUTOMATIC HIGH BEAM MAIN SWITCH) Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY [AUTOMATIC HIGH BEAM MAIN SWITCH] - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] AND BODY GROUND)


    1. Disconnect the I33 combination switch assembly (automatic high beam main switch) connector.

    2. Disconnect the I47 main body ECU (multiplex network body ECU) connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      I33-1 (+B) - I47-23 (AHBI) Always Below 1 Ω
      I33-10 (E) - Body ground Always Below 1 Ω
      I33-1 (+B) or I47-23 (AHBI) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR