Sunroof / Moonroof: Description and Operation

Sunroof

Purpose of the System




When the ignition key is in the accessory or "on" position press the switch to lift (1), close the sunroof (2) or open the sunroof (3).

When lifting, the headliner retracts several inches. The sunroof can continue to operate after the ignition has been switched off (up to 16 minutes) as long as one of the front doors has not been opened.

E36 vehicles are equipped with the steel roof while the Z3 Coupe is equipped with the glass (moon) roof. Mechanically, the sunroofs are similar in design.

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).





System Components: Inputs - Processing - Outputs