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 options in the Porsche System Tester under the specified test conditions:

1. The chassis is adjusted according to Porsche specifications.
2. Switch on ignition.
3. Wheels in straight-ahead position and steering wheel horizontal.
4. In the straight-ahead position, the steering wheel must deviate by no more than ± 2.0° from the horizontal position (steering centre position).
5. Enter the safety code under >> Calibrate <<in the Porsche System Tester.
6. Turn the steering wheel out of the straight-ahead position in accordance with the instructions in the Porsche System Tester. Turn the wheels back to the straight-ahead position and follow the instructions in the Porsche System Tester.
7. After successful calibration, the stored fault code is erased from the fault memory. The PSM indicator light in the instrument cluster goes out.