Passive Anti-Theft System (PATS) Function

WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

The PATS function is controlled by the IC . PATS uses the IC to carry out all of the PATS functions such as receiving the identification code from the PATS key, issuing a signal to the PCM to control the starter and fuel injectors enable, and initiating the key interrogation sequence when the ignition key is turned to the ON or START position. Because of the interaction between the IC and the PCM, there are parameters that must be set if the IC or the PCM (or both) are replaced. Refer to PASSIVE ANTI-THEFT SYSTEM (PATS) PARAMETER RESET . If the IC must be replaced for any reason (PATS concerns or an IC concern), the PATS keys also must be programmed into the new IC . Refer to INTEGRATED KEYHEAD TRANSMITTER (IKT) KEY PROGRAMMING USING DIAGNOSTIC EQUIPMENT . All elements of PATS must be functional before the vehicle starts. If any of the components are not working correctly, the vehicle cannot start.

PATS is not compatible with aftermarket remote start systems, which allow the vehicle to be started from the exterior of the vehicle. These systems can reduce the security of the vehicle, and also can be the cause of no-start concerns. Remote start systems must be removed from the vehicle before any PATS -related no-start concerns are investigated.