VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1436

DTC Code DTC Name
C1436 Yaw Rate Sensor Malfunction

DESCRIPTION

This DTC is stored when the skid control ECU (brake actuator assembly) detects improper installation of the yaw rate and acceleration sensor (airbag sensor assembly) or an abnormality in the difference between the yaw rate sensor value and the control value estimated based on the acceleration sensor, steering angle sensor and speed sensor signals.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1436 Yaw Rate Sensor Malfunction Difference between the yaw rate sensor value and the control value estimated inside the skid control ECU (brake actuator assembly) is abnormal.

  • Sensor installation

  • Yaw rate sensor (airbag sensor assembly)

PROCEDURE


  1. READ VALUE USING GTS (YAW RATE AND ACCELERATION SENSOR)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Select the Data List using the GTS.

      Click here


      Chassis > ABS/VSC/TRC/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/TRC/EPB > Data List
      Tester Display
      Yaw Rate Sensor

    4. Check the yaw rate and acceleration sensor (airbag sensor assembly) output value displayed on the GTS.

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

      Tech Tips

      If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing parts.

      Click here


    B

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. CHECK STEERING ANGLE SENSOR ZERO POINT CALIBRATION


    1. Turn the ignition switch off.

    2. Drive the vehicle straight ahead at 50 km/h (31 mph) or more for at least 30 seconds.

    3. Check that the steering wheel is correctly centered while driving straight ahead.

      Tech Tips

      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

    NG

    ADJUST FRONT WHEEL ALIGNMENT OR STEERING Click here

    OK

  3. CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION


    1. Check that the yaw rate and acceleration sensor (airbag sensor assembly) has been installed properly.

      Click here

      OK
      The airbag sensor assembly is tightened to the specified torque.
      The airbag sensor assembly is not be installed in a tilted position.

      Tech Tips

      If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing parts.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    NG

    INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY Click here