Hi people little while back I disconnected my battery on my 2002 type r ep3 anyways reconnecting the battery car starts fine but when I got out of the car and locked it using the fob the car made 2 chirps.reminds of the sound vin diesel rx7 made in fast and the furious 1 when he parks it in the garage during police chase.it actually sounds cool I kinda like it but when I enter my radio code so stereo works it no longer makes the chirp like noise.

I have took battery off few times and does this.

My question is why lol