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 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 ECU also stores the previous zero point.

If front wheel alignment or the steering wheel position is adjusted without disconnecting the cable from the negative (-) battery terminal, or if the yaw rate and acceleration sensor zero point is not acquired after the 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 outputs this DTC to indicate a poor adjustment.

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

DTC Code DTC Detection Condition Trouble Area
C1290 The newly acquired steering 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

INSPECTION PROCEDURE

Note

When replacing the brake actuator assembly, perform zero point calibration and store system information Click here.

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.

      Tech Tips


      • When the stored zero point of the yaw rate and acceleration sensor is cleared, steering 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, steering sensor zero point cannot be acquired normally even if the vehicle is driven straight ahead at 35 km/h (22 mph) or more.


    NEXT

  2. CHECK STEERING 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 the front wheel alignment and steering position are adjusted as a result of an abnormal center position of the steering wheel, acquire yaw rate and acceleration sensor zero point again after adjusting the front wheel alignment and steering position again.

      OK
      The steering wheel is centered correctly.

    NG

    ADJUST FRONT WHEEL ALIGNMENT OR STEERING POSITION Click here

    OK

  3. RECONFIRM DTC


    1. Turn the engine switch off.

    2. Clear the DTCs Click here.

    3. Start the engine.

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

    5. Check if the same DTC is recorded Click here.

      Result
      Result Proceed to
      DTC (C1290) is not output A
      DTC (C1290) is output B

      Tech Tips

      If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step Click here.


    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

    END