2 Door - ZVM Control

1992-93 E36 COUPE WITH ZVM CONTROL












The design of the E36 Coupe required that the window operation control be changed. The E36/2 coupe power window system uses a combined window motor and control module.
- When opening the door, the door glass is automatically lowered by approximately 10 mm.
- When the door is closed, the glass is raised back into the seal. This allows the glass to drop out of the door seal when opening the door and provides a tighter seal when the door and glass are closed.
- The control module on the window motor contains a hall sensor and processor for this feature's operation.
- When either the door handle contact or door latch switch closes, the window will drop the 10 mm. The door handle contact was eliminated in 93 models.)
- It remains down until the door contact switch opens when the door is closed. The window will then raise back into the door seal.







The power window switch of the E36 coupe was also changed from the originally introduced system. It has a second detent position for the purpose of signaling the one touch feature

POWER WINDOW OPERATION







The toll/one-touch feature along with anti-trap was also added to the window circuits through the use of these door modules. A hall sensor and processor in the module is used to detect window position.

The one-touch function is activated by momentarily pressing the window switch to the second detent. Window travel will cease when the full up or down position has been reached. The one-touch can be canceled by pressing the window switch a second time.

Anti-trap is provided by the module monitoring the door glass movement from the hall sensor. If the door glass encounters resistance in the closing direction (> 100 Nm) the motor will stop and reverse direction for 50 mm of travel.

When the window switch is continuously held in the second detent, the anti-trap feature is overridden.

INITIALIZATION OF WINDOW CIRCUITS
Initialization of the window circuits is required for the one-touch and anti-trap features to function. Closing the window and holding the switch for an additional two seconds will initialize the system. However the window drive motor switches off automatically after the motor ceases rotation for approximately 0.3 seconds.