54 0 ... Notes on steel and glass slide/tilt sunroofs (initialization/normalization/learning 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 slide/tilt sunroof are recorded and stored for correct operation of the anti-trapping mechanism.

NOTE: An initialization must be performed:

In the event of malfunctions, e.g. no one-touch opening or no comfort function possible.
After disengagement of the drive unit.
If necessary, after an interruption of the power.
After work is carried out on the mechanism of the slide/tilt sunroof.

NOTE: The initialization sequence is dependent on the software version of the slide/tilt sunroof module (in the sunroof drive unit).

If necessary, code slide/tilt sunroof drive unit.

WARNING: There is no anti-trapping protection during initialization.

Normalization:

Press and hold the switch in the "Lift" direction.
In the event of delayed starting or sudden stopping of the slide/tilt sunroof, continue pressing the switch in the "Lift" direction.

Fig 1: Pressing And Hold Switch In "Lift" Direction
Courtesy of BMW OF NORTH AMERICA, INC.
After reaching lift end position (A), keep switch pressed for approx. 20 seconds further.
Normalization is completed when the slide/tilt sunroof in lift end position (A) presses again briefly in the direction of position (B).
Release switch.

Fig 2: Identifying Slide/Tilt Sunroof In Lift End Position Pressing Again Briefly In Direction Of Position
Courtesy of BMW OF NORTH AMERICA, INC.

Learning Characteristic Curve:

E46 Compact

E46 Saloon, Touring, Coupe From 09/2001; Initial Equipment Of Drive Unit

E46 Saloon, Touring, Coupe; Replacement Of Drive Unit

The curve is learnt manually in the following steps:

Release switch after normalization for max. 5 seconds.

Fig 3: Identifying Slide/Tilt Sunroof Switch
Courtesy of BMW OF NORTH AMERICA, INC.
Then hold down the switch in the raising position direction until such time that the slide/tilt sunroof has returned to the closed position after a complete opening move.
This concludes learning of the curve. The switch can now be released.

NOTE: Carry out function check (one-touch function, anti-trapping protection and, if necessary, comfort function).

E46 Saloon, Touring, Coupe Up To 09/2001; Initial Equipment Of Drive Unit:

The curve is determined by means of coding.