Normal Operation
WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
The passive anti-theft system (PATS) transceiver module communicates with the PATS key. During each vehicle start sequence, the PATS transceiver module reads the PATS key identification code and sends the data to the powertrain control module (PCM). The control functions are contained in the PCM. This module carries out all of the PATS functions, such as receiving the identification code from the PATS key and controlling engine enable. The PCM initiates the key interrogation sequence when the key is turned to ON or START.