When technicians need to perform advanced security tasks—such as in "all keys lost" situations or replacing a control unit (PCM or BCM)—the vehicle's diagnostic system requires a security handshake. How Does Ford PATS Work?
often requires these calculators to unlock advanced service functions. Timed Access
By inputting these parameters, the calculator generates a unique PATS login code that allows technicians to access and program the vehicle's computer system.