Porsche 996 TT, Repair Manual

Page: 419 / 2099

The steering gear and / or components which change the zero position of the steering angle sensor
have been exchanged,
4. Accident
repairs,
5. Suspension alignment procedures during which the previous wheel alignment values were changed.
Calibrating steering angle sensor
WARNING
Malfunctions in the PSM control range if the steering angle sensor is not calibrated or is calibrated
incorrectly!
Calibrate the steering angle sensor with the wheels in straight−ahead position! •
Note
Check the steering angle sensor actual value with wheels in straight−ahead position before calibrating
the steering angle sensor! Only recalibrate the steering angle sensor on the measuring platform if the
steering angle actual value lies outside the tolerance or is doubtful! •
1. Drive vehicle onto measuring platform. Affix measured−value pickups to all wheels.
2. Check wheel alignment values and adjust if necessary. If the wheel alignment values on the front and rear
axles are correct, calibrate the steering angle sensor with the front wheels in straight−ahead position.
Calibration description in following text.
3. Select the "Calibrate steering angle sensor" menu with the Porsche System Tester 2 in the PSM
system. Entry to the PSM system takes place through the ABS system (automatic status change after
PSM).
4. Confirm calibration start. The procedure can also be interrupted.
5. Vehicle wheels in straight−ahead position.
Note
This safety code must be extracted in the Actual Values menu, Safety Code sub−menu! The safety
code changes automatically each time provided that PSM is called up again! •
The calibration procedure will be interrupted if an incorrect safety code is entered! This
time−consuming procedure ensures that the steering angle sensor is not calibrated unintentionally! •
The steering angle sensor can be calibrated several times! The value (the zero position) is stored in the
steering angle sensor itself! •
6. The PST 2 now requests the 4−digit safety code shown in the display.
7. Input the 4−digit safety code with the cursor keys (4 centre keys on right). Then continue with the (>>)
key.
Note
einordnung
The steering angle sensor must be calibrated after: 356