VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1436

DTC Code DTC Name
C1436 Yaw Rate Sensor Malfunction

DESCRIPTION

The skid control ECU (brake actuator assembly) receives signals from the yaw rate and acceleration sensor (airbag sensor assembly) via the CAN communication system.

The airbag sensor assembly has a built-in yaw rate and acceleration sensor and detects the vehicle's condition using 2 circuits (GL1, GL2).

If there is trouble in the bus lines between the acceleration sensor (airbag sensor assembly) and the CAN communication system, DTC U0124 (Lost Communication with Lateral Acceleration Sensor Module) is set.

These DTCs are also output when calibration has not been completed.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1436 Yaw Rate Sensor Malfunction

Either of the following is detected:


  1. With the vehicle stationary, the yaw rate and acceleration sensor output value is not 0 deg/s.

  2. Abnormal comparison value.

 Yaw rate sensor (Airbag sensor assembly)

WIRING DIAGRAM

Refer to DTCs C1232, C1243, C1245 and C1279.

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CAUTION / NOTICE / HINT

Note


  • When replacing the skid control ECU (brake actuator assembly), perform zero point calibration.

    Click here

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

    Click here

  • When replacing the yaw rate and acceleration sensor (airbag sensor assembly), perform acceleration sensor zero point calibration and CVT oil pressure calibration (for continuously variable transaxle).

    K111: Click here

    K111F: Click here

Tech Tips

When U0124 and/or U0126 is output together with C1436, inspect and repair the trouble areas indicated by U0124 and/or U0126 first.

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PROCEDURE


  1. READ VALUE USING GTS (YAW RATE SENSOR)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Chassis / ABS/VSC/TRC / Data List.

    5. According to the display on the GTS, read the Data List.

    6. Check that the yaw rate sensor output value displayed on the GTS.


      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

      Tech Tips

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

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

    B

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION


    1. Turn the ignition switch off.

    2. Check that the airbag sensor assembly has been installed properly.

      Click here

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

      Tech Tips

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

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    NG

    INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY Click here