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Home >> Toyota >> 2021 >> Avalon Touring >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Electronically Controlled Brake System - Diagnostic Codes (C1336-P0571) (Except Hybrid) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model) >> DTC C1436: Malfunction in Yaw Rate Sensor [04/2018 - 08/2021] >> Procedure

DTC C1436: Malfunction in Yaw Rate Sensor [04/2018 - 08/2021]: Procedure

  1. READ VALUE USING TECHSTREAM (YAW RATE AND ACCELERATION SENSOR) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Enter the following menus: Chassis / ABS/VSC/TRAC/EPB / Data List.

      Chassis > ABS/VSC/TRAC/EPB > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Yaw Rate 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 > ABS/VSC/TRAC/EPB > Data List 

      Tester Display
      Yaw Rate Sensor
    4. Check the yaw rate and acceleration sensor (airbag sensor assembly) output value displayed on the Techstream.

      Result

      Result Proceed to
      The value of Yaw Rate Sensor is 0°/s when the vehicle is stopped and the output value fluctuate when the vehicle turning right or left A
      The value of Yaw Rate Sensor is not 0°/s when the vehicle is stopped B
      The value of Yaw Rate Sensor is 0°/s when the vehicle is stopped and the output value does not fluctuate when the vehicle turning right or left C

    Result: 

    B 

    REPLACE AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL [04/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 - 08/2021] 

    Result: 

    C 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [04/2018 -] 

    Result: 

    A 

    See step  2

  2. CHECK STEERING ANGLE SENSOR ZERO POINT CALIBRATION 
    1. Turn the engine switch off.
    2. Drive the vehicle straight ahead at 15 km/h (9 mph) or more for at least 1 second.
    3. Check that the steering wheel is correctly centered while driving straight ahead.

      HINT: 

      If front wheel alignment and steering are adjusted as a result of an off-center steering wheel, acquire the yaw rate and acceleration sensor zero point again after the adjustments are completed.

      OK

      The steering wheel is correctly centered.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    ADJUST FRONT WHEEL ALIGNMENT OR STEERING. Refer to  ADJUSTMENT [04/2018 - 08/2019]  , or refer to  ADJUSTMENT [08/2019 - 08/2020]  , or refer to  ADJUSTMENT [08/2020 - 08/2021] 

    Result: 

    OK 

    See step  3

  3. CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION 
    1. Check that the yaw rate and acceleration sensor (airbag sensor assembly) has been installed properly.

      Refer to INSTALLATION [04/2018 - 08/2020] , or refer to INSTALLATION [08/2020 -]

      OK

      The yaw rate and acceleration sensor (airbag sensor assembly) is tightened to the specified torque.

      The yaw rate and acceleration sensor (airbag sensor assembly) is not installed in a tilted position.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL [04/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 - 08/2021] 

    Result: 

    NG 

    INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY. Refer to  INSTALLATION [04/2018 - 08/2020]  , or refer to  INSTALLATION [08/2020 -]