car security, 2009 corolla

do this in addition to the alarm being hooked up to the unlock wire. the time it takes to activate the relay and pulse the wire again will give you a double pulse and unlock the other three doors.

There is another way, use the door switch wire instead of the key cylinder wire. Just like the old Corollas, the drawback is if you lock with the switch on the way out of the car the door won't unlock with the remote. In otherwords, in order for this to work you have to lock with the remote everytime or you will have to use the key to get in. As for the wire itself, i don't know the color but it is in the same plug as the cylinder wires and will show ground when the switch is pushed. this only requires one pulse to unlock all doors....