Principle of Operation

The motor incorporates a sunroof module (>96 MY) which receives inputs from the sunroof switch (1) for operation. This sunroof system has the one touch open function.

The sunroof module is linked to the GM for two purposes:

• The comfort closing feature when the key is held in the lock position in one of the door lock cylinders.
• Unloader signal. This signal (30h) informs the sunroof motor module to stop running the sunroof motor when the GM receives a start signal (KL 50).
  Fig 1: Identifying Sunroof Switch

  Courtesy of BMW OF NORTH AMERICA, INC.