Theft Systems Description and Operation: Disarming
WARNING: This page is about a different car, the 2004 Suzuki Swift + and 2004 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.
When the driver door is unlocked with a key, the tamper switch closes. This grounds the door's input to the remote control door lock receiver (RCDLR). The system is then disarmed and the alarm state will not become active when the door is opened.
The remote control door lock receiver is an internal part of the RCDLR for the remote keyless entry (RKE) system. When the RCDLR receives a valid key transmission from the remote transmitter, it unlocks the doors. Therefore the RCDLR recognizes this in the same manner as a valid door lock switch disarm input.
Turning the ignition switch to any position out of LOCK will not disarm the system when the alarm is active.