US Patent 8022808 Vehicle power door control with passive entry

A vehicle equipped with a passive key entry system may employ a method of controlling a vehicle power sliding door(s) or other door(s), to accomplish locking, unlocking, opening and closing of such doors. A switch on a door handle may be activated by a physical touch or touches of a user, after which, the method may proceed with inquiring and confirming if all vehicle doors are closed; inquiring and confirming if all vehicle doors are locked; inquiring and confirming if a valid passive entry key is exterior to and within range of the vehicle; unlocking a power sliding door with a lock motor; and opening the power sliding door with a door motor. Before actually performing a door opening, closing or locking, a passive entry key system on the vehicle may verify the presence of a passive entry key fob.