Calibrating steering-angle sensor
Note. 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. In order to be able to calibrate the steering angle sensor correctly, the vehicle must be on the measuring platform, the wheel alignment values correct and the steering in the straight-ahead position. The security code is displayed in the Porsche System Tester under menu PSM , Actual values , Security code .
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. In the straight-ahead position, the steering wheel must deviate by no more than ± 2.0° from the horizontal position (steering center 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. Turn wheels or steering wheel to straight-ahead position and calibrate the steering-angle sensor in the menu PSM , Calibration . To calibrate, you must enter the security code in the actual values menu PSM , Actual values .
5. Enter security code and confirm with F7 .
6. Turn steering-wheel to Tester default position.
7. Tester confirms Calibration successful .
8. Carry out a test drive and read out fault memory.