ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1290/66

DTC Code DTC Name
C1290/66 Steering Angle Sensor Zero Point Malfunction

DESCRIPTION

The skid control ECU (brake booster with master cylinder assembly) acquires the steering angle 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 (brake booster with master cylinder 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 and acceleration sensor zero point is not acquired after the adjustments have been completed, the skid control ECU (brake booster with master cylinder 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 angle 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

C1290/66

Steering Angle Sensor Zero Point Malfunction

751

The steering angle sensor zero point is judged as an abnormal value.

  • 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

VSC DTC

CAUTION / NOTICE / HINT

Note:

When replacing the skid control ECU (brake booster with master cylinder assembly), perform initialization and calibration of the linear solenoid valve.

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

      Chassis > ABS/VSC/TRC > Utility

      Tester Display

      Test Mode
      Tip:

      • 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, 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 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 and acceleration sensor zero point again after the adjustments are completed.

      OK

      The steering wheel is centered correctly.

    Result

    Proceed to

    OK

    NG
    NG

    ADJUST FRONT WHEEL ALIGNMENT OR STEERING POSITION

    Click here

    OK

  3. RECONFIRM DTC

    1. Clear the DTCs.

      Click here

      Chassis > ABS/VSC/TRC > Clear DTCs

    2. Turn the power switch off.

    3. Turn the power switch on (READY).

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

    5. Check if the same DTC is output.

      Click here

      Chassis > ABS/VSC/TRC > Trouble Codes

    Result

    Result

    Proceed to

    DTC C1290/66 is not output.

    A

    DTC C1290/66 is output.

    B
    A

    END

    B

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

    for LHD:Click here

    for RHD:Click here