Calibrating Steering-Angle Sensor

Information 

• The steering-angle sensor must be recalibrated on the measuring platform following repairs to or work on the chassis/steering or if the steering-angle sensor/steering column switch/hydraulic unit is replaced. 
• Calibration includes initialization. 
• In order to be able to calibrate the steering-angle sensor correctly, the vehicle must be on the measuring platform, the wheel alignment values must be correct and the steering must be in the straight-ahead position. 
• To calibrate the steering angle correctly, the PSM control unit must first be coded successfully (e.g. after replacing the hydraulic unit). 
• The safety code is displayed under >> PSM >> Actual values << in the Porsche System Tester. Please take note of this code for future use. 

The steering angle sensor must be calibrated using the menu with PIWIS tester under the specified test conditions:

1. Switch on ignition.
2. Turn wheels or steering wheel to straight-ahead position.
3. Before calibrating, first turn the steering wheel from the straight-ahead position approx. 20° to the left and 20° to the right (past straight-ahead position).
4. Calibrate steering-angle sensor.

   with wheels and steering wheel in straight-ahead position.

   Turn wheels or steering wheel to straight-ahead position and calibrate the steering-angle sensor. To calibrate, you must enter the security code in the actual values menu.

   In the straight-ahead position, the steering wheel must deviate by no more than ± 2.0° from the horizontal position (steering centre position).

   1. 4.1. Request safety code in the Porsche System Tester under >> PSM >> Actual values <<. Take note of this code for future use.