Functional description, see BMW Technology:

TIS -> Document -> SI Technology -> 32 01 03001

Diagnosis instructions

Commissioning/adjustment of the active steering is necessary during or after the following work:

• work on the steering column
  

• after replacing the active steering control unit
  

• after replacing the steering column switching centre (SZL):
  

• on calibration of the steering-angle sensor
  

• after replacing the steering gear
  

Here, select the service function Commissioning/Adjusting active steering and work through it (automated operation).

The function can be found at the following path:
Service functions/Chassis/Active steering