I just got this JDM Honda Fit GD3 with 200km mileage, I'm not sure what year model it is, probably 2006. Whenever I remove the key in the ignition, it starts beeping 3 times and it won't stop until I turn the key to the II position. Even when I had someone lock the door on the outside, the beeping still happened. I'm worried it may drain the battery and I'm planning to sleep in the car and this beeping is annoying as hell.
I asked the owner why this was happening, and he said it was probably the alarm but the key didn't have buttons to disarm or enable the alarm, it doesn't look like the original Honda key as well.
The only light on in the dash that indicates issues is the airbag, that's it.

Here's the video: The beep starts when the green key icon flashes
https://streamable.com/aaq692

This is what the ignition looks like:
https://streamable.com/ii8zc4

 

Hi, don’t know if you found a solution yet, but mine beeps if you don’t turn off the headlights.