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

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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-trap mechanism.

Initialization is started and implemented by pressing and holding switch in "Lift" direction.

Initialization depends on installed roof system and software used.

Then carry out initialization :

if the glass sunroof has been mechanically moved by means of the emergency operation
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 repair work is carried out on the mechanism of the glass sunroof
after exchange of the control unit
after replacement of circumferential gasket

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

For correct initialization and function, the following preconditions 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

Operate switch in "Lift" direction and hold (roof system moves to "Lift" position)
In the event of delayed start or sudden stop of the glass sunroof, continue operating the switch in the "Lift" direction

Fig 1: Lifting Sunroof 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 further pressed for approx. 30 seconds (initialization starts)
Glass sunroof moves briefly from fully raised position (A) in direction of position (B)
Shading system (sliding head liner) closes completely
Shading system (sliding head liner) closes completely
Glass sunroof moves to "Closed" position
Glass sunroof then moves to "Open" end position and immediately back to "Closed" position
After a brief pause, shading system closes completely

Fig 2: Identifying Glass Sunroof Raised Position

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Once glass sunroof and shading system have closed completely, initialization is finished. Button 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 (one-touch function, anti-trapping protection and, if necessary, comfort function)