Passive Anti-Theft System Transceiver Module
WARNING: This page is about a different car, the 2001 Ford Excursion and 2000 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.
Passive Anti-theft System (PATS) transceiver module communicates with encoded ignition key. During each vehicle start sequence, transceiver module reads the encoded ignition key identification code and sends data to PATS control module.