One other thing. That little LCD on the dash that blinks is also the vallet switch. Pressing it causes the system to stop chirping (if I remember correctly). And, arming the system with the doors open does cause it to change the chirp sequence. As stated above, "it is supposed to do that." Check your owner's manual if you have it handy. I think it gives the exact details. If you don't have it E-mail me. I think I still have mine. I could scan the key sections for you.