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Home >> Lexus >> 2021 >> LS 500 Base, AWD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (W/ Vacuum Brake Booster) - Diagnostic Codes (2 Of 4) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/ Vacuum Brake Booster) >> DTC C124F-62: Yaw Rate Sensor Signal Compare Failure [09/2018 - 10/2023] >> Procedure

DTC C124F-62: Yaw Rate Sensor Signal Compare Failure [09/2018 - 10/2023]: Procedure

  1. READ VALUE USING TECHSTREAM (YAW RATE SENSOR) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Select the Data List using the Techstream.

      Refer to DATA LIST / ACTIVE TEST [09/2018 - 10/2023]

      Chassis > Brake 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Yaw Rate Sensor Value Acceleration sensor (yaw rate sensor) Min.: -128°/s
      Max.: 127°/s
      Vehicle stopped: 0°/s
      Turning right: -128 to 0°/s
      Turning left: 0 to 127°/s
      -

      Chassis > Brake > Data List 

      Tester Display
      Yaw Rate Sensor Value
    4. Check the yaw rate sensor output value displayed on the Techstream.

      Result

      Result Proceed to
      NG (The yaw rate sensor output value is 0°/s when the vehicle is stationary, but the value fluctuates when turning.) A
      NG (The yaw rate sensor output value is not 0°/s when the vehicle is stationary.) B
      OK C
      NOTE:

      Check the yaw rate sensor signal after replacement.

      Refer to TEST MODE PROCEDURE [09/2018 - 10/2023]

    Result: 

    B 

    REPLACE YAW RATE SENSOR. Refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 10/2023] 

    Result: 

    C 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 10/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2020 - 11/2021]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - 10/2022]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 10/2023] 

    Result: 

    A 

    See step  2

  2. CHECK ACCELERATION SENSOR (YAW RATE SENSOR) INSTALLATION 
    1. Turn the engine switch off.
    2. Check that the acceleration sensor (yaw rate sensor) has been installed properly.

      Refer to INSTALLATION [09/2018 - 10/2020] , or refer to INSTALLATION [10/2020 - 11/2021] , or refer to INSTALLATION [11/2021 - 10/2023]

      OK

      The sensor is tightened to the specified torque.

      The sensor is not installed in a tilted position.

      NOTE:

      Check the yaw rate sensor signal after replacement.

      Refer to TEST MODE PROCEDURE [09/2018 - 10/2023]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE YAW RATE SENSOR. Refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 10/2023] 

    Result: 

    NG 

    INSTALL YAW RATE SENSOR CORRECTLY. Refer to  INSTALLATION [09/2018 - 10/2020]  , or refer to  INSTALLATION [10/2020 - 11/2021]  , or refer to  INSTALLATION [11/2021 - 10/2023]