Window Anti-Trap Detection (Sedan, Coupe And Sport Wagon)
The window anti-trap detection feature is only active in the one touch and convenience close modes of operation. If the window switch is pushed/pulled and held, the Anti-trap feature will not function.
The rubber pressure guards are located at the top edge of each door frame for the Sedan and Sport Wagon and are incorporated into the felt edge protector in the Coupe. Each guard consists of two contact strips that close when subjected to pressure. This provides anti-trap detection and signal generation to the GM V.
When the contact strip closes, the window immediately (10ms) reverses direction as with previous anti-trap systems. The contact strip does not require that the anti-trap feature be initialized prior to operation.
The E46 pressure sensor finger guard has a resistance of 3.0 k/Ohm and it is monitored for open circuit. When pressed, the monitored resistance changes to <1KOhm. Faults with the anti-trap system require that the window switch be held to close the window.