Windows: Description and Operation

Power Windows (ZKE/FH):

Functional Description:

Block Diagram Power Windows:

Image Legend:
No. Abb. Description

1 GM General module
2 RM Relay module
3 TMFT Driver's door module
4 TMBT Passenger's door module
6 Power window switch block S40
7 Electronic power fuse relay: Driver's side K15
Passenger's side K30
M20 Power window motor driver's door, rear
M21 Power window motor driver's door
M22 Power window motor passenger's door, rear
M23 Power window motor passenger's door
S45 Driver's window contact, rear
S46 Passenger's window contact, rear
S97 Power window switch, passenger's door

General:

The front power windows (FH) are controlled by the corresponding door module. The rear power windows by the general module (GM) of the ZKE II. The power window relays are located in the relay module (RM). The load circuits are fuse protected by means of the electronic power fuse ES relay K15.

Operation:

The power windows can be operated by way of the power window switch block or by means of the power switch (driver's door). The power window switch block is located on the driver's door and is linked via a data line to the general module (GM). The power window motor drive is switched off automatically on reaching the end position.

Switch-on conditions: Ignition (terminal 15) ON:

Switch-off conditions:

ECE version: Windows can still be operated after switching off the ignition. Power window system deactivated after opening and closing the driver's or passenger's door.

US version, Australia: Operation deactivated after switching off the ignition and opening the driver's or passenger's door

Finland version: Switch-off conditions as ECE version but no toll circuit for driver's window and sun root

Special features:

Central opening and closing:

The windows and the sunroof can be closed and opened by way of the door locks. For this purpose, the key must be held for longer than 2 seconds in the lock or unlock position. The sequence for the central closing function is rear power windows, front power windows, sunroof (SHD). The reverse sequence applies to central opening.

Lowering window:

To avoid wind noises and instability, the closed door windows are positioned in a rubber lip in the roof. When operating the door handles on the inside or outside, the corresponding window is lowered by several millimeters to facilitate easy opening and closing of the door.

Jamming protection, position sensor:

The position of the front power windows is monitored by position sensors. If, while closing a door window, the position sensor detects jamming of a part in the closing range of the window, the closing operation of the power window is interrupted and the window is opened once again by approx. 10 cm. The anti-jamming feature is only active until the last 4 mm of the power window closing range (window up) are reached. The anti jamming feature is not active when the power window button is constantly pressed in the second rest position. This facilitates emergency closing.

Initialization:

If battery voltage is disconnected or the general module, relay module or one of the door modules is removed, the position sensors must be initialized after reconnection or reinstallation.

Check for non-initialized condition: Toll circuit not possible.

Initialization instructions:

- Close doors
- Close front power windows as far as they will go by pressing and holding the power window switch in the second rest position.
- When window is closed, hold switch pressed for at least 3 seconds
- Power window is initialized - check toll circuit

Speed-dependent window closing:

The front windows are closed automatically at a speed above 150 km/h.

Country-specific variants:

The country coding is achieved by way of the software in the ZKE coding data.