54 0... Notes on glass slide/tilt sunroof (initialization/normalization of characteristic curve)

NOTE: Initialization comprises:

Normalization
Learning characteristic curve

The mechanical end positions are recorded and stored during normalization.
The characteristic curve is learnt immediately after normalization.
When the characteristic curve is learnt, the mechanical closing forces of the glass sunroof are recorded and stored for correct operation of the anti-trapping mechanism.
Initialization is started and implemented by pressing and holding switch in "Lift" direction.
Initialization depends on installed roof system and software used.

NOTE: Then carry out initialization :

if the glass sunroof has been mechanically moved by means of the emergency actuator
in the event of malfunctions, e.g. no one-touch function, no opening or no comfort function possible
after disengagement of the drive unit
after work is carried out on the mechanism of the glass sunroof
after the control unit has been replaced
after replacement of circumferential gasket

WARNING: The anti-trapping mechanism is not active during initialization.

For correct initialization and function, the following conditions must be met:

Ignition ON
at room temperature (23°C ± 5°C)
No direct solar radiation
only when vehicle is at a standstill
Fully charged vehicle battery
in addition, for US vehicles, let engine run to enable key, if necessary

NOTE: Subsequently described processes relate to a completely closed roof system. However, initialization can be started from any position.

Initialization process:

Move switch in "Lift" direction and hold (roof system moves to "Lift" position)
In the event of delayed starting or sudden stopping of the glass sunroof, continue pressing the switch in the "Lift" direction

Fig 1: Locating Roof System Switch
Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Hold switch depressed for entire process.

After reaching the fully raised position (A), keep the switch pressed for approx. 30 seconds further (initialization process starts)
Glass sunroof moves briefly from lift end position (A) in direction of position (B)
Glass sunroof moves to "Closed" position
Glass sunroof then moves to "Open" end position and immediately back to "Closed" position

Fig 2: Lifting Glass Sunroof
Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Initialization is completed once the glass sunroof is completely closed. Switch can be released.

NOTE:

If the switch is released in the meantime, the entire procedure must be repeated
On completion of successful initialization, the corresponding messages in the check control and the control display go out
Carry out function check (tip function, anti-trapping protection and, if necessary, comfort function)