— 34 —
5.3 SAS
Steering Angle Sensors (SAS) System Calibration permanently stores the current steering
wheel position as the straight-ahead position in the SAS EEPROM. Therefore, the front
wheels and the steering wheel must be set exactly to the straight-ahead position before
calibration. In addition, the VIN is also read from the instrument cluster and stored
permanently in the SAS EEPROM. On successful completion of calibration, the SAS fault
codes will be automatically cleared.
To reset the steering angle, you need to first find the relative zero point position for the
car to drive in a straight line. Taking this position as a reference, the ECU can calculate the
accurate angle for left and right steering.
After replacing the steering angle position sensor, replacing steering mechanical parts
(such as steering gearbox, steering column, end tie rod, steering knuckle), performing
four-wheel alignment, or recovering the car body, you must reset the steering angle.
The operation guidelines of the SAS function are shown as below:
1.
Enter the
SAS
menu and choose relevant models according to the vehicle being
tested.
2.
Enter the
Set steering angle sensor
menu and follow the instructions displayed.
