PATS Function

WARNING: This page is about a different car, the 2007 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If the instrument cluster or the PCM is being replaced (or both), the parameters must be reset in both modules or the vehicle will experience a PATS no-start. This will occur even if the vehicle is not equipped with PATS. PATS vehicles and non-PATS vehicles have parameters in the instrument cluster and the PCM and they must be reset whenever either (or both) module(s) is (are) replaced. Refer to Passive Anti-Theft System (PATS) Parameter Reset in this article.

The PATS function is controlled by the instrument cluster. The PATS uses the instrument cluster to carry out all of the PATS functions such as receiving the identification code from the PATS key, issuing a signal to the powertrain control module (PCM) to control the starter and fuel injectors enable, and initiates the key interrogation sequence when the ignition key is turned to the ON or START position. Because of the interaction between the instrument cluster and the PCM, there are parameters that must be set if the instrument cluster or the PCM (or both) are replaced. Refer to Passive Anti-Theft System (PATS) Parameter Reset in this article. If the instrument cluster must be replaced for any reason (PATS concerns or driveability concerns), the PATS keys also must be programmed into the new instrument cluster. Refer to Key Programming Using Diagnostic Equipment in this article. All elements of PATS must be functional before the vehicle will start. If any of the components are not working correctly, the vehicle will not start.

PATS is active only for a few seconds when the vehicle is starting. It is not a PATS concern if the vehicle stalls after it has been running for a minimum of 3 seconds. PATS will not disable a running vehicle.

PATS is not compatible with aftermarket remote start systems, which allow the vehicle to be started from the exterior of the vehicle. These systems may reduce the security of the vehicle, and also may 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.