Prius V with a factory install alarm

Guys,

I purchased a Prius V that came with a factory installed alarm. Anytime, I can get additional items, I think I got away with a "deal". However, recently, the alarm has been a bit wacky. Perhaps, I am not sure how it works, but I wanted to see if anyone experienced this.

When unlock the door (front passenger or trunk) by grabbing the handle it opens fine, but when I close the door or open another door, it the alarms goes off (horn). My guess is the grabbing the handle unlocks the door, but doesn't "disarm" the system. I am missing something?

Thanks!

 

Thanks Parnami - Yup, got my serviced and its now working as it should.