VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1436

DTC Code DTC Name
C1436 Yaw Rate Sensor Malfunction

DESCRIPTION

The skid control ECU receives signals from the yaw rate and acceleration sensor via the CAN communication system.

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

If there is trouble in the bus lines between the yaw rate and acceleration sensor and the CAN communication system, DTCs U0123 (malfunction in CAN communication with the yaw rate sensor) and U0124 (malfunction in CAN communication with the acceleration sensor) are set.

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

DTC Code DTC Detection Condition Trouble Area
C1436

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 and acceleration sensor

WIRING DIAGRAM

Refer to DTCs C1232, C1243 and C1245 Click here.

INSPECTION PROCEDURE

Note

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

Tech Tips

When U0123, U0124 and/or U0126 is output together with C1436, inspect and repair the trouble areas indicated by U0123, U0124 and/or U0126 first Click here.

PROCEDURE


  1. READ VALUE ON INTELLIGENT TESTER (YAW RATE AND ACCELERATION SENSOR)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Select the Data List mode on the intelligent tester Click here.

      ABS / VSC / TRC:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Yaw Rate Sensor Yaw rate sensor / min.: -128 deg/s, max.: 127 deg/s

      Vehicle stationary: 0 deg/s

      Right turn: -128 to 0 deg/s

      Left turn: 0 to 127 deg/s

      		 -
      Yaw Rate Sensor 2 Yaw rate sensor 2 / min.: -128 deg/s, max.: 127 deg/s

      Vehicle stationary: 0 deg/s

      Right turn: -128 to 0 deg/s

      Left turn: 0 to 127 deg/s

      		 -

    4. Check that the yaw rate and acceleration sensor output value displayed on the intelligent tester.

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

      Note

      Check the yaw rate and acceleration sensor signal after replacement Click here.

      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.


    B

    REPLACE YAW RATE AND ACCELERATION SENSOR Click here

    C

    CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) Click here

    A

  2. CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION


    1. Turn the ignition switch off.

    2. Check that the yaw rate and acceleration sensor 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.

      Note

      Check the yaw rate and acceleration sensor signal after replacement Click here.

      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.


    NG

    INSTALL YAW RATE AND ACCELERATION SENSOR CORRECTLY Click here

    OK

    REPLACE YAW RATE AND ACCELERATION SENSOR Click here