VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1436

DTC Code DTC Name
C1436 Yaw Rate Sensor Malfunction

DESCRIPTION

The yaw rate sensor has a built-in acceleration sensor.

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

DTC No. DTC Detection Condition Trouble Area
C1436 Difference between the yaw rate sensor value and the control value estimated inside the skid control ECU is abnormal.
  • Sensor installation

  • Yaw rate sensor

CAUTION / NOTICE / HINT

Note

When replacing the yaw rate and acceleration sensor (yaw rate sensor), perform acceleration sensor zero point calibration Click here.

PROCEDURE


  1. READ VALUE USING GTS (YAW RATE SENSOR)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Select the Data List on the GTS Click here.

      ABS/VSC/TRC
      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

      -
    4. Check the yaw rate sensor output value displayed on the GTS.

      Result
      Result Proceed to
      NG (The yaw rate sensor output value is 0°/s when vehicle is stationary, but value fluctuates when turning.) A
      NG (The yaw rate sensor output value is not 0°/s when 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 Click here.


    B
    C
    A
  2. CHECK STEERING ANGLE SENSOR ZERO POINT CALIBRATION


    1. Turn the ignition switch off.

    2. Start the engine.

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

    4. 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.

    NG
    OK
  3. CHECK YAW RATE SENSOR INSTALLATION


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

      OK
      The yaw rate and acceleration sensor (yaw rate sensor) is tightened to the specified torque.
      The yaw rate and acceleration sensor (yaw rate sensor) is not installed in a tilted position.

    OK
    NG