Factory alarm goes off spontaneosly every 3 minutes?

swe370z

Hi,
Yesterday my Z started to sound the OEM alarm every 3-4 minutes, and still does. Very annoying for me and my neighbors.

I Googled the problem and found some threads here, and I noticed someone had a problem with the hood latch switch (if that's the official name?). I've checked the door switches, and there's no visible problem

I went out to the car, started it up and noticed that this light is lit until maybe 7-10 seconds after every enginestart, and then shuts off just like the other warninglights.
But is this normal for this warninglight, should it light up at all?



Or, do you have any other suggestion what the problem can be? I can't understand why the alarm keeps going off. Z has just been at the workshop for regular service, and they changed all fluids in the car, if something happened there?
Z has also just been put in traffic again after the winter, two weeks ago.

Thanks in advance!