54 0 ... Notes on steel and glass slide/tilt sunroofs (initialization/normalization/learning of characteristic curve): Notes

WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 2003 BMW 540i, 2003 BMW 525i, 2002 BMW 540i, 2002 BMW 525i, and 2001 BMW 540i. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Initialization comprises:

Normalization
Learning characteristic curve

The mechanical end positions are recorded and stored during normalization.

The characteristic curve is learned immediately after normalization.

When the characteristic curve is learned, 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 function, no opening or no comfort function possible.
After disengagement of the drive unit.
If necessary, after an interruption of the power supply.
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 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: Lifting Slide/Tilt Sunroof
Courtesy of BMW OF NORTH AMERICA, INC.

Learning characteristic curve:

E38 from 9/98; replacement of drive unit

E39 from 3/98

E46 Compact

E46 Saloon, Touring, Coupe from 09/2001; initial equipment of drive unit

E46 Saloon, Touring, Coupe; replacement of drive unit

E53 slide/tilt sunroof (not: panoramic glass sunroof):

Fig 3: Pressing Switch In "Lift" Direction

Courtesy of BMW OF NORTH AMERICA, INC.

The curve is learned manually in the following steps:

Release switch after normalization for max. 5 seconds.
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 movement.
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).