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Home >> Lexus >> 2021 >> UX 200 Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Lighting System (Exterior) (Diagnostic Codes (2 Of 2) & Circuit Tests) >> Lighting System >> Automatic High Beam System does not Operate or Operation Indicator does not Illuminate [07/2022 - ] >> Procedure

Automatic High Beam System does not Operate or Operation Indicator does not Illuminate [07/2022 - ]: Procedure

  1. CHECK VEHICLE CONTROL HISTORY (RoB) 
    1. Using the GTS, check for Vehicle Control History (RoB).

      Body Electrical > Front Recognition Camera (Front Lighting Control) > Utility 

      Tester Display
      Vehicle Control History (RoB)

      Result

      Result Proceed to
      Vehicle control history (RoB) X204E is not output A
      Vehicle control history (RoB) X204E is output B

    Result: 

    B 

    GO TO VEHICLE CONTROL HISTORY (RoB). Refer to  VEHICLE CONTROL HISTORY [07/2022 - ] 

    Result: 

    A 

    See step  2

  2. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Chassis / Front Recognition Camera / Data List.
    5. Read the Data List according to the display on the Techstream.

      Chassis > Front Recognition Camera > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Front Recognition Camera High Temperature 2 Forward recognition camera condition Not High Temperature or High Temperature Not High Temperature: 65°C (149°F) or lower
      High Temperature: 65°C (149°F) or higher      		 When "High Temperature" is displayed, the automatic high beam system is temporarily suspended.

      Chassis > Front Recognition Camera > Data List 

      Tester Display
      Front Recognition Camera High Temperature 2

      OK

      "Not High Temperature" is displayed on the Techstream.

      HINT: 

      If "High Temperature" is displayed, move the vehicle to a cool place and allow the temperature of the forward recognition camera to decrease before continuing with troubleshooting.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    END (TEMPORARY SUSPENSION OF AUTOMATIC HIGH BEAM SYSTEM DUE TO HIGH FORWARD RECOGNITION CAMERA TEMPERATURE) 

    Result: 

    OK 

    See step  3

  3. CHECK AUTOMATIC HIGH BEAM INDICATOR LIGHT 
    1. Check the operation of the automatic high beam indicator light.
      1. Turn the ignition switch to ON.
      2. Turn the light control switch to the AUTO or head position.
      3. Cover the automatic light control sensor to turn the low beam headlights on.
      4. Move the dimmer switch to the low position.
      5. Press the automatic high beam switch.

        OK

        Automatic high beam indicator light illuminates.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  6

    Result: 

    OK 

    See step  4

  4. READ VALUE USING TECHSTREAM 
    GTY819664Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *1 Forward Recognition Camera
    (Automatic High Beam Sensor)
    *2 Work Light or Equivalent
    *a 100 mm or less
    1. Shine a light on the automatic high beam sensor.

      HINT: 

      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.

    2. Connect the Techstream to the DLC3.
    3. Turn the ignition switch to ON.
    4. Turn the Techstream on.
    5. Enter the following menus: Body Electrical / Main Body / Data List.
    6. Read the Data List according to the display on the Techstream.

      HINT: 

      As it may take time for the values in the Data List to change, wait at least 10 seconds before reading the Data List.

      Body Electrical > Main Body > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Auto H Beam STS0 Automatic high beam sensor current state Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Er**cut** Condition can be displayed -

      Body Electrical > Main Body > Data List 

      Tester Display
      Auto H Beam STS0

      OK

      "Daytime" is displayed on the Techstream.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE FORWARD RECOGNITION CAMERA. Refer to  REMOVAL [07/2022 - ] 

    Result: 

    OK 

    See step  5

  5. READ VALUE USING TECHSTREAM 
    GTY826413Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *1 Cardboard or Equivalent Object
    *a 150 mm or more
    *b 3 mm or more
    1. 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.
    2. Enter the following menus: Body Electrical / Main Body / Data List.
    3. Read the Data List according to the display on the Techstream.

      HINT: 

      As it may take time for the values in the Data List to change, wait at least 10 seconds before reading the Data List.

      Body Electrical > Main Body > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Auto H Beam STS0 Automatic high beam sensor current state Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Er**cut** Condition can be displayed -

      Body Electrical > Main Body > Data List 

      Tester Display
      Auto H Beam STS0

      OK

      "Speed" is displayed on the Techstream.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ] 

    Result: 

    NG 

    REPLACE FORWARD RECOGNITION CAMERA. Refer to  REMOVAL [07/2022 - ] 

  6. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Chassis / Steering Angle Sensor / Data List.
    5. Read the Data List according to the display on the Techstream.

      Chassis > Steering Angle Sensor > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Auto High Beam Main Switch Automatic high beam switch signal OFF or ON OFF: Automatic high beam switch off
      ON: Automatic high beam switch on      		 -

      Chassis > Steering Angle Sensor > Data List 

      Tester Display
      Auto High Beam Main Switch

      OK

      Normal conditions listed above are displayed.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  9

    Result: 

    OK 

    See step  7

  7. READ VALUE USING TECHSTREAM 
    1. Enter the following menus: Body Electrical / Main Body / Data List.
    2. Read the Data List according to the display on the Techstream.

      Body Electrical > Main Body > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Auto H Beam STS0 Automatic high beam sensor current state Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Er**cut** Condition can be displayed -

      Body Electrical > Main Body > Data List 

      Tester Display
      Auto H Beam STS0

      OK

      "Daytime" or "Speed" is displayed on the Techstream.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE FORWARD RECOGNITION CAMERA. Refer to  REMOVAL [07/2022 - ] 

    Result: 

    OK 

    See step  8

  8. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Enter the following menus: Body Electrical / Combination Meter / Active Test.
    2. Perform the Active Test according to the display on the Techstream.

      Body Electrical > Combination Meter > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      Automatic High Beam Indicator (Green) Automatic high beam indicator light OFF or ON -

      Body Electrical > Combination Meter > Active Test 

      Tester Display
      Automatic High Beam Indicator (Green)

      OK

      Automatic high beam indicator light illuminates.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [07/2022 - ] 

    Result: 

    NG 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [07/2022 - ] 

  9. INSPECT TURN SIGNAL SWITCH 
    1. Remove the turn signal switch.

      Refer to REMOVAL [10/2018 - ]

    2. Inspect the turn signal switch.

      Refer to INSPECTION [10/2020 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE TURN SIGNAL SWITCH. Refer to  REMOVAL [10/2018 - ] 

    Result: 

    OK 

    See step  10

  10. INSPECT STEERING WHEEL SWITCH HOUSING 
    1. Remove the steering wheel switch housing.

      Refer to REMOVAL [07/2022 - ]

    2. Inspect the steering wheel switch housing.

      Refer to INSPECTION [10/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE STEERING SENSOR. Refer to  REMOVAL [07/2022 - ] 

    Result: 

    NG 

    REPLACE STEERING WHEEL SWITCH HOUSING. Refer to  REMOVAL [07/2022 - ] 

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