Normal Operation
WARNING: This page is about a different car, the 2005 Mercury Mountaineer and 2005 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
The warning chime is an integral part of the instrument cluster. The instrument cluster sounds the door ajar chime when the driver door is opened and the ignition switch is in the RUN or START position. The door ajar status is sent to the instrument cluster from the vehicle security module.