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

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 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

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: Operating Switch In Lift Direction

  Courtesy of BMW OF NORTH AMERICA, INC.

• 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 Switch In Raised Position

  Courtesy of BMW OF NORTH AMERICA, INC.