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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2133 (Anti-Theft - Passive Anti-Theft System (Pats) - (Hybrid)) >> Description And Operation >> Anti-Theft >> PATS Function

PATS Function

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: If the IC or the TCM (or both) is replaced, the parameters must be reset in both modules or the vehicle will experience a PATS no-start. Refer to Passive Anti-Theft System (PATS) Parameter Reset .
NOTE: When using the IDS, the IC and the TCM parameters are reset at the same time.

The PATS function is controlled by the IC. The IC is used to carry out all of the PATS functions such as receiving the identification code from the PATS key, controlling the electronically controlled continuously variable transmission (eCVT) and fuel injector(s) 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 IC and the TCM, there are parameters that must be set if the IC or the TCM (or both) is replaced. Refer to Passive Anti-Theft System (PATS) Parameter Reset . If any of the components are not working correctly, the vehicle will not start. If the IC must be replaced for any reason (PATS concerns or IC concerns), the PATS keys must be programmed into the new IC. Refer to Integrated Keyhead Transmitter (IKT) Key Programming Using Diagnostic Equipment . Also, the parameters must be reset in the IC and the TCM if either module (or both) has been replaced. Refer to Passive Anti-Theft System (PATS) Parameter Reset .

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.

When operating properly, the Hybrid normally shuts down the engine after it has been idling for approximately 2 minutes, and the anti-theft indicator does not illuminate. As soon as the driver presses the accelerator, the Hybrid will either start the engine and accelerate the vehicle, or the traction motor in the eCVT will cause the Hybrid to accelerate. Depending on how much pressure is applied to the accelerator pedal, the TCM will determine if only the traction motor engages, or the engine will start, or both the traction motor and the engine will cause the Hybrid to accelerate. If the engine shuts down, it may be due to normal Hybrid operation. At this time, always check to see if the anti-theft indicator is flashing or glowing (PATS concern) or if it is not illuminated. PATS always affects the starting of the vehicle, whether the traction motor or the engine (or both) cause the Hybrid to start and accelerate. PATS will not cause a running vehicle to stall.

PATS may cause a vehicle no start due to either the fuel injectors not operating or the TCM not cranking the engine, or both. Always check for PATS DTCs from the IC and the TCM when a no-crank or no-start condition exists. A low state of charge (SOC) in the vehicle battery may cause the PATS to allow the TCM to crank the engine, but prevent the fuel injectors from operating. If the theft light does not prove out (it may be either flashing or glowing steadily) and one (or both) of the previous conditions (fuel injectors and/or engine won't crank) are present, it may be due to a PATS issue. If the theft light proves out, it may not be a PATS issue. If the theft light does not illuminate at all, it may be an IC issue. For additional information, refer to the Symptom Chart in this article.

The PATS function uses the IC and the TCM to enable or disable the engine. All elements of PATS must be functional before the engine is allowed to start. If any of the components are not working correctly, the vehicle will not start. If there is a PATS concern present, the IC will send a message to the PCM to not allow fuel injector operation and should send a message to the TCM to not start the engine. If the vehicle starts and stalls, or the engine will not start at all, check the anti-theft indicator operation and if flashing or glowing, retrieve DTCs from the IC and the PCM and follow the PATS diagnostics in this article.

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.

PATS will disable the vehicle from starting if there is:

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