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ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1290

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DTC Code DTC Name
C1290 Abnormal Zero Point of Steering Angle Sensor
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DESCRIPTION

The skid control ECU assembly acquires the steering sensor zero point every time the power switch is turned on (READY) and the vehicle is driven at 35 km/h (22 mph) or more for approximately 5 seconds. The skid control ECU assembly also stores the previous zero point.

If the front wheel alignment or the steering wheel position is adjusted without disconnecting the cable from the negative (-) auxiliary battery terminal, or if yaw rate sensor zero point is not acquired after the adjustments have been completed, the skid control ECU assembly detects the difference between the previous zero point and newly acquired zero point and stores this DTC to indicate a poor adjustment.

Warning operation for the steering sensor zero point malfunction will be canceled by turning the power switch off.

DTC No. Detection Item INF Code DTC Detection Condition Trouble Area Note
C1290 Abnormal Zero Point of Steering Angle Sensor 351 The steering sensor zero point is judged as an abnormal value.

  • Yaw rate sensor zero point calibration incomplete

  • Poor adjustment of the center position of the steering wheel

  • Poor adjustment of front wheel alignment

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CAUTION / NOTICE / HINT

Note:

When replacing the skid control ECU assembly, perform initialization and calibration of the linear solenoid valve.

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PROCEDURE


  1. Click here

    PERFORM ZERO POINT CALIBRATION OF YAW RATE SENSOR


    1. Perform zero point calibration of the yaw rate sensor.

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      Note:

      Make sure to perform initialization and calibration of the linear solenoid valve after performing "Reset Memory" as the data stored during linear solenoid valve offset learning is cleared.


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





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




      Tip:

      • When the stored zero point of the yaw rate sensor is cleared, steering sensor zero point will also be cleared.

      • If the zero point and output value of the yaw rate sensor and the output value of the speed sensors are not normal, steering sensor zero point cannot be acquired normally even if the vehicle is driven straight ahead at 35 km/h (22 mph) or more.

      Result
      Proceed to
      NEXT

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    CHECK STEERING SENSOR ZERO POINT CALIBRATION


    1. Turn the power switch off.

    2. Turn the power switch on (READY).

    3. Drive the vehicle straight ahead at 35 km/h (22 mph) or more for at least 5 seconds.

    4. Check that the steering wheel is centered correctly while driving straight ahead.

      Tip:

      If front wheel alignment and steering position are adjusted as a result of the steering wheel being off-center, acquire yaw rate sensor zero point again after the adjustments are completed.

      OK
      The steering wheel is centered correctly.
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      ADJUST FRONT WHEEL ALIGNMENT OR STEERING POSITION for 2WD:Click here

      ADJUST FRONT WHEEL ALIGNMENT OR STEERING POSITION for AWD:Click here

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    RECONFIRM DTC


    1. Turn the power switch off.

    2. Clear the DTCs.

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


    3. Turn the power switch off.

    4. Turn the power switch on (READY).

    5. Drive the vehicle at a speed of 35 km/h (22 mph) or more and turn the steering wheel to the right and left.

    6. Check if the same DTC is output.

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


      Result
      Result Proceed to
      DTC C1290 is not output. A
      DTC C1290 is output. B

    • A

      END

    • B

      REPLACE SKID CONTROL ECU ASSEMBLY for LHD:Click here

      REPLACE SKID CONTROL ECU ASSEMBLY for RHD:Click here