If you are not driving the car for months at a time, you should be disconnecting the battery cables and using a trickle charger. Especially during winter months if you live a cold climate.I just buy a corllola 2009, ce. I notice that the security light will flash once I turn off the engine and it will flash all the time until I insert key again. The dealer tell me this is immobilizer system functioning. I am wondering if it has to be this way? If I leave my car there for 2-3 months not driving it, it will also flash all the time? I do not see the light flash in dealer's showroom.
Yes it will flash all the time and it doesn't take much power so no need to worry. My car will sit for weeks at a time and it hardly drains the battery.
If it's not flashing in the showroom then, chances are the negative cable has been removed for safety and insurance purposes. Perhaps there's another reason since mine is pure speculation.