Passive Anti-Theft System (PATS)
WARNING: This page is about a different car, the 2004 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
The passive anti -theft system (PATS) is integrated into the PCM. The PCM controls the PATS system functions as well as illumination of the anti-theft indicator. The PCM stores the ignition key codes and controls engine disable. For additional information, refer to ANTI-THEFT .