HA! Funny you should ask Ben, Last night I actually thought of something similar to maybe what you're thinking. My door ajar light is always on cause when me and my buddy removed the door to cut out the rot from the pillar, we didn't do the greatest job hanging it back up straight. So thinking along the lines as possibly some safety thing, with the door wide open, I pushed the button to trigger the door ajar light off while turning the key...nothing new happened.
Just now going outside to get the exact rundown, here's my finding....
Door wide open key on: 4 beeps
Finger pushing door button key on: 4 beeps
Button, release, button (mimic entering vehicle) key on: 4 beeps
Door open, button in or out, lights on: 4 beeps
Key removed, door open, lights on: constant beep
Key removed, lights on, push button: no beep
Whatcha thinking Ben!?!
If it at all matters, air bag light is on. I removed the front sensor...it was in the way of my Knight Rider LED light bar
:rofl