VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1290

DTC Code DTC Name
C1290 Steering Angle Sensor Zero Point Malfunction

DESCRIPTION

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

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

The warning operation for the steering angle sensor zero point malfunction will be canceled by turning the engine switch off.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1290 Steering Angle Sensor Zero Point Malfunction The newly acquired steering angle sensor zero point vastly differs from the previous one.

  • Yaw rate and acceleration sensor zero point calibration incomplete

  • Poor adjustment of the center position of the steering wheel

  • Poor adjustment of front wheel alignment

PROCEDURE


  1. PERFORM ZERO POINT CALIBRATION OF YAW RATE AND ACCELERATION SENSOR


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

      Click here


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

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

      Tech Tips


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

      • If the zero point and output value of the yaw rate and acceleration sensor and the output value of the speed sensors are not normal, the steering angle 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

    NEXT

  2. CHECK STEERING ANGLE SENSOR ZERO POINT CALIBRATION


    1. Turn the engine switch off.

    2. Start the engine.

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

    4. Check that the center position of the steering wheel is correctly set while driving straight ahead.

      Tech Tips

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

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

    OK

    END

    NG

    ADJUST FRONT WHEEL ALIGNMENT OR STEERING POSITION Click here