VEHICLE STABILITY CONTROL SYSTEM(for Vacuum Brake Booster), Diagnostic DTC:C1436, C1473

DTC Code DTC Name
C1436 Yaw Rate Sensor Malfunction
C1473 Yaw Rate Sensor (Test Mode DTC)

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.

If there is trouble in the bus lines between the yaw rate and acceleration sensor (airbag sensor assembly) 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 stored.

These DTCs are also stored when calibration is not completed.

DTC C1437 is stored only in test mode.

DTC Code DTC Detection Condition Trouble Area
C1436

Either condition is met:


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

  2. An abnormal comparison value.

 Yaw rate sensor (Airbag sensor assembly)
C1473 Stored only during test mode. Yaw rate sensor (Airbag sensor assembly)

WIRING DIAGRAM

Refer to DTCs C1232, C1243 and C1245 Click here.

CAUTION / NOTICE / HINT

Note

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

Tech Tips

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

PROCEDURE


  1. READ VALUE USING GTS (YAW RATE SENSOR)


    1. Turn the ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

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

      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 stationary: 0°/s

      Right turn: -128 to 0°/s

      Left turn: 0 to 127°/s

      		 -

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

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

      Note

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


    B

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. CHECK AIRBAG SENSOR ASSEMBLY


    1. Turn the ignition switch off.

    2. Check that the yaw rate and acceleration sensor (airbag sensor assembly) is installed properly Click here.

      OK
      The sensor is tightened to the specified torque.
      The sensor is not installed at an angle.

      Note

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


    OK

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    NG

    INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY Click here