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 ECU assembly) via the CAN communication system.

The airbag ECU 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 ECU 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 Note
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.

  • Improper yaw rate sensor (airbag ECU assembly) installation

  • Yaw rate sensor (airbag ECU assembly)

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CAUTION / NOTICE / HINT

Note

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

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 engine switch on (IG).

    3. Turn the GTS on.

    4. Select the Data List using the GTS.

      Click here

    5. Check 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 ECU 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 ECU assembly) output value is not 0 deg/s when the vehicle is stationary.) B
      OK C

    B

    REPLACE AIRBAG ECU ASSEMBLY w/ Navigation System: Click here
    REPLACE AIRBAG ECU ASSEMBLY w/o Navigation System: Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. CHECK AIRBAG ECU ASSEMBLY INSTALLATION


    1. Turn the engine switch off.

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

      Click here

      OK
      The sensor is tightened to the specified torque.
      The sensor is not installed in a tilted position.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIRBAG ECU ASSEMBLY w/ Navigation System: Click here
    REPLACE AIRBAG ECU ASSEMBLY w/o Navigation System: Click here

    NG

    INSTALL AIRBAG ECU ASSEMBLY w/ Navigation System: Click here
    INSTALL AIRBAG ECU ASSEMBLY w/o Navigation System: Click here