Pass-Key II(R)
WARNING: This page is about a different car, the 1994 Cadillac Fleetwood. However, it is still accessible from the selected car via links, so may be relevant.
Personal automotive security system (PASS-Key II(R)) is designed to prevent vehicle theft by disabling engine unless an ignition key assembly with a specific electrical resistance is used in ignition cylinder assembly. System components include ignition key assembly, ignition cylinder assembly, Central Control Module (CCM), starter enable relay assembly, and Powertrain Control Module (PCM).