I found that my Civic will beep fast three to four times if I close all the doors but the key fob is out of range. For example, I had gotten groceries and my keys where in the door of the house which was about 15 or so feet away. When I finally closed the doors on the car, it wouldn't lock. Instead it beeped fast about three or four times.On a few occasions I've heard 3 beeps when returning to the car and unlocking (by touching the door handle) as opposed to 2 beeps. Any idea what this means?