Power Latch: Operation
WARNING: This page is about a different car, the 2004 Chrysler Pacifica. However, it is still accessible from the selected car via links, so may be relevant.
Operating on hardwired inputs from the power liftgate control module, the latch mounted actuator (cinch/release motor) provides the torque required to close the liftgate from the secondary to the primary closed and latched position. The actuator also releases the liftgate from the primary closed and latched position to the fully unlatched and movable position.
NOTE:
Power latch "Cinching" will become disabled if the pinch sensors are inoperable or damaged.