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Home >> Lexus >> 2022 >> UX 200 Base >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Lighting System (Exterior) (Diagnostic Codes (2 Of 2) & Circuit Tests) >> Lighting System >> Turn Signal Switch Circuit [10/2018 - ] >> Procedure

Turn Signal Switch Circuit [10/2018 - ]: Procedure

  1. 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
      Turn Signal Switch (Right) Turn signal switch (right turn position) signal OFF or ON OFF: Turn signal switch not in right turn position
      ON: Turn signal switch in right turn position
      -
      Turn Signal Switch (Left) Turn signal switch (left turn position) signal OFF or ON OFF: Turn signal switch not in left turn position
      ON: Turn signal switch in left turn position
      -
      Cornering Light/Front Side Illuminate Light Switch Turn signal switch (full turn) signal OFF or ON OFF: Turn signal switch not in left or right turn position
      ON: Turn signal switch in left or right full turn position
      -

      Chassis > Steering Angle Sensor > Data List 

      Tester Display
      Turn Signal Switch (Right)
      Turn Signal Switch (Left)
      Cornering Light/Front Side Illuminate Light Switch

      OK

      Normal conditions listed above are displayed.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [10/2018 - 10/2019]  Refer to  PROBLEM SYMPTOMS TABLE [10/2019 - 10/2020]  Refer to  PROBLEM SYMPTOMS TABLE [10/2020 - 07/2022]  Refer to  PROBLEM SYMPTOMS TABLE [07/2022 - ] 

    Result: 

    NG 

    See step  2

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

      Refer to REMOVAL [10/2018 - ]

    2. Inspect the turn signal switch.

      Refer to INSPECTION [10/2018 - 10/2020] 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  3

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

      Refer to REMOVAL [10/2018 - 07/2022] 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 [10/2018 - 07/2022]  Refer to  REMOVAL [07/2022 - ] 

    Result: 

    NG 

    REPLACE STEERING WHEEL SWITCH HOUSING. Refer to  REMOVAL [10/2018 - 07/2022]  Refer to  REMOVAL [07/2022 - ]