Patent ID: 7683764

Claim:
A method of controlling a locking system for a door of a vehicle, the method comprising: initiating an auto-lock command with a control unit in the vehicle; searching an area surrounding the vehicle for a valid key fob by employing the control unit to transmit a signal outside the vehicle; sending a normal request from an interior antenna within an interior of the vehicle, the normal request covering less than all of the interior of the vehicle, if the valid key fob is found outside the vehicle; sending a wide area request from the interior antenna to the interior of the vehicle, the wide area request covering all of the interior of the vehicle, if the valid key fob is not found within the interior of the vehicle by the normal request; locking the door if the valid key fob is not found by the normal request; locking the door if the valid key fob is not found by the wide area request; and providing a warning and not locking the door if the valid key fob is found by one of the normal request and the wide area request.