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

Note

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)

Tire pressure warning light (w/ tire pressure warning system) blinks for 63 seconds and then remains on.

CAUTION / NOTICE / HINT

Note:

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

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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 hereClick hereClick here

      Chassis > ABS/VSC/TRC > 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 > 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
      Tip:

      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.

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    B

    REPLACE AIRBAG SENSOR ASSEMBLY

    Click here

    C

    USE SIMULATION METHOD TO CHECK

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    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.

      Tip:

      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 hereClick 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 installed in a tilted position.

      Tip:

      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 hereClick here

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE AIRBAG SENSOR ASSEMBLY

    Click here

    NG

    INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY

    Click here