Do you have access to TIS? There are schematics as well as a functional descrtping as to how the system works.
Oddly, IHKA (the heat and AC controller) is how this is controlled. There is a reset/recal proceure in ISTA
SOme comments:
Quote:
Notes for Service department
Diagnosis instructions
After coding or programming the IHKA control unit, standardisation of the steering column is to be run. After repair work on the electrical steering column adjustment, the service function ”Standardisation” is also to be run. Note! Failure of the Hall sensor on the motor
In the event of failure of the Hall sensor, no identification of the position is possible for the steering column adjustment. In the same way, the system cannot move to any position stored in the memory. The Softstop is switched off. The time for activation of the overload protection is shortened. This protects the steering column adjustment motor against overheating.
Note! Failure of the Hall sensors for the Softstops
In the event of failure of the Hall sensors for the Softstops, the time for activation of the overload protection is shortened. This protects the steering column adjustment motor against overheating.
Note! System state due to cold
Blocking of the steering column adjustment due to cold is regarded as a mechanical stop. This might mean that the adjusting path in one adjustment direction is restricted.
Notes on coding / programming
Important! IHKA control unit
After coding or programming the IHKA control unit, standardisation of the steering column is to be run.
|
Oh as 80stech commented, there is another fuse box. F1 in the box behind the glove box is for the steering column...