Power Windows

1994-1997, ALL MODELS - ZKE IV CONTROL







With the introduction of ZKE IV, the control of the power window circuits was integrated into the General Module. The separate front door modules of the ZVM system were deleted, however the hall sensors on the front door glass motors are still required. The general module contains the relays for front window operation.

A Relay Module was added for rear window operation in the 4 door and convertible models only. Similar to the front window relays in the General Module, the Relay Module contains the relays for the rear window motors on these cars. The Relay Module is located forward of the glove box in the electrical carrier next to the General Module.

ZKE IV WINDOW SWITCHES
A further simplified window switch was also introduced with ZKE IV. The switch continued to have a second detent position for one touch signalling, but it requires one less wire for communicating with the General Module.

All of the features of the ZVM system carry over to the ZKE IV including:
- Toll/One-touch operation (up/down on front windows, down only on rear.)
- Anti-trap on the front windows only!
- Initialization required for one-touch operation.
- Child lock out - now a switched ground input to the General Module. With this ground signal active, rear door window switch signals are ignored.

Power window features with ZKE IV include:
- Comfort Closing - Any open window can be closed from the door lock cylinders by holding the key in the lock position.
- Power protection - against a jammed or seized motor. This is monitored by the hall sensors which causes the power to be interrupted to a jammed motor.
- Rear windows utilize current sensing for shut off.

Features of the ZKE IV specific to the E36 convertible include:







- Central window switch - in the center console that will raise or lower all four windows at the same time. The window lowering has the one-touch feature.
- Convertible top operation - Prior to lowering the top, the top control module signals the GM to lower all four windows half way.
- If the top switch is held after the top is fully lowered, the windows will close fully.
- If the top switch is held after the top is fully closed the GM will close the windows.

- With the introduction of the fully automatic convertible top, the comfort close feature of the convertible was also added.