Normal Operation
WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
The transceiver module communicates with the passive anti-theft system (PATS) key. During each vehicle start sequence, the transceiver module reads the PATS key identification code and circuit 1216 (GY/OG) 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.