I just bought a 2010 forester and need to turn off the passive alarm. I read the manual and did the hold unlock for 10 seconds and the display read "al off". But if i leave my car unlocked for 2 minutes or so, the car chirps and then the alarm is activated. This is incredibly annoying in situations like a gas station and my garage. Does anyone know if I can deactivate this myself or do i have to have a dealer do it.