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VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1460

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DTC Code DTC Name
C1460 Zero Point Calibration of Vertical Acceleration Sensor undone
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DESCRIPTION

The roll rate and vertical acceleration sensor is built into the yaw rate sensor.

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

Tip:

When a malfunction occurs in the communication line to the roll rate and vertical acceleration sensor (yaw rate sensor), U110F (Lost Communication With Roll Rate Sensor/Vertical Acceleration Sensor Module) is output.

If a DTC related to the CAN communication line is output, first troubleshoot the CAN communication line.

This DTC is output when roll rate and vertical acceleration sensor zero point calibration is incomplete.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1460 Zero Point Calibration of Vertical Acceleration Sensor undone Zero point calibration of the roll rate and vertical acceleration sensor is incomplete

  • Incorrect installation of roll rate and vertical acceleration sensor (yaw rate sensor)

  • Roll rate and vertical acceleration sensor (yaw rate sensor)

  • Skid control ECU (brake actuator assembly)
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CAUTION / NOTICE / HINT

Note:

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

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  • When replacing or reinstalling the roll rate and vertical acceleration sensor (yaw rate sensor), perform zero point calibration and store system information after clearing previously calibrated data.

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Tip:

When U110F is output together with C1460, inspect and repair the trouble areas indicated by U110F first.

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PROCEDURE


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    PERFORM ZERO POINT CALIBRATION OF ROLL RATE AND VERTICAL ACCELERATION SENSOR


    1. Perform zero point calibration of the roll rate and vertical acceleration sensor.

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      1. Chassis > ABS/VSC/TRC > Utility
        Tester Display
        Reset Memory





      1. Chassis > ABS/VSC/TRC > Utility
        Tester Display
        Test Mode




      Result
      Proceed to
      NEXT

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    RECONFIRM DTC


    1. Clear the DTCs.

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      1. Chassis > ABS/VSC/TRC > Clear DTCs


    2. Turn the engine switch off.

    3. Start the engine.

    4. Perform a road test.

    5. Check if the same DTC is output.

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      1. Chassis > ABS/VSC/TRC > Trouble Codes


      Result
      Result Proceed to
      DTC C1460 is not output. A
      DTC C1460 is output. B

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    CHECK YAW RATE SENSOR INSTALLATION


    1. Turn the engine switch off.

    2. Check that the roll rate and vertical acceleration sensor (yaw rate sensor) has been installed properly.

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      OK
      The roll rate and vertical acceleration sensor (yaw rate sensor) is tightened to the specified torque.
      The roll rate and vertical acceleration sensor (yaw rate sensor) is not installed in a tilted position.
      Result
      Proceed to
      OK
      NG

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    READ VALUE USING GTS (ROLL RATE AND VERTICAL ACCELERATION SENSOR)


    1. Select the Data List using the GTS.

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      1. Chassis > ABS/VSC/TRC > Data List
        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        Lateral Acceleration Value Vertical acceleration sensor output value

        Min.: -25.10 m/s2

        Max.: 24.90 m/s2

        		 During turning: Changes in proportion with acceleration -
        Upper and Lower Acceleration Value Upward and downward acceleration value

        Min.: -25.10 m/s2

        Max.: 24.90 m/s2

        With a 9.8 m/s2 (gravitational acceleration) base value, the value increases with upward acceleration and decreases with downward acceleration

        		 -




      1. Chassis > ABS/VSC/TRC > Data List
        Tester Display
        Lateral Acceleration Value
        Upper and Lower Acceleration Value





    2. Check the roll rate and vertical acceleration sensor (yaw rate sensor) output value displayed on the GTS.

      OK
      The roll rate and vertical acceleration sensor (yaw rate sensor) output value is normal.
      Result
      Proceed to
      OK
      NG