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A PATS system is a car security system that monitors the car’s keys. Each car is provided with a transponder in the key, and each transponder has a different code that the system recognizes. In total, there are 18 billion possible combinations of codes generated by the PATS system. When the car is turned on, the transponder sends data to a module in the vehicle’s engine. This data can be a potential threat, but a simple solution can be found online.
Transponder in key head is used to deceive Ford PATS system
If you’ve lost your key, or simply want to save money, there are ways to disable Ford PATS system. A simple key-head transponder transmits an RF message to the vehicle’s PC, which confirms that the key is in fact the one you’re trying to start. The traditionalist reaction may be to panic, but you’ll still need to disable the fuel siphon and the motor to make it start. Fortunately, there are some easy ways to bypass the Ford PATS system, and you can do it yourself without the help of an expert.
Also read: How to Disable Transponder Key Systems Without Key
You first need a screwdriver or flathead screwdriver. Then, use a flathead screwdriver to open the black square on top of the key. Care must be taken not to break the transponder. You must have the key with the transponder near the ignition. If the key is not near the ignition, the Ford vehicle can’t read the chip.
The Ford PATS system, also known as the Ford Securilock, is an innovative system that uses an RFID chip in the key head to determine whether a car key is genuine. By scanning the key’s transponder chip, the car can determine whether the key is a genuine one or a fake. A fake key has no RFID chip and therefore won’t communicate with the transponder and won’t start the engine.
Communication issues between PCM and PATS module
When you notice that your PATS indicator is blinking fast, there are a few things you can do to fix the problem. First, make sure the light is blinking only once or twice per second. If it blinks many times per second, the module has a communication problem. Next, verify that the PCM is receiving the signal from the PATS transceiver module. If you’re unsure of which component is responsible for the blinking, contact the manufacturer of your vehicle.
The PATS module is a separate part of the ignition switch, and it has two dedicated communication lines. The communication lines use a “challenge and response” style protocol that uses the vehicle’s data communication BUS to send a signal to the PCM when the theft detection sensor detects a key. The transceiver in the PATS module biases the TX line with 12 volts and pulls the RX line low to communicate. The PATS module itself pulls the RX line low to talk, and the PCM does the same.
Other common causes for communication issues between the PCM and PATS module include a malfunctioning key transceiver. This device is usually found on a car’s dashboard, and is responsible for providing a key bypass. However, the system isn’t foolproof. It requires an adapter that is reliable and has a reliable connection. A USB adapter is ideal for this purpose. If you’re concerned about your vehicle’s security, FORScan recommends an OBD2 USB adapter that will ensure a more reliable connection.
Failure modes of PATS module
If your vehicle’s PATS module is failing to work, you may have to perform a self-diagnosis procedure. Usually, you can perform a test by pressing the start/stop switch, but you may encounter other failure modes as well. Here’s a look at some of these modes to determine which one is causing your car to malfunction. Regardless of the failure mode, a diagnostic procedure is important to resolve the problem.
The PATS module is either a standalone module, integrated into the instrument cluster, or contained within the PCM. It works by reading key codes stored in nonvolatile memory and comparing it to the stored codes. If a key is programmed correctly, the PATS module will unlock the vehicle and prevent theft. However, it may malfunction when the keys are removed. In these cases, the diagnostic process will require access to the PATS ECU and the fault code memory.
The PATS control module is a stand-alone module that communicates with the encoded ignition key. It’s located behind the steering wheel column shroud. It’s connected to the PCM via a hard-wired connection. The transceiver energizes the transponder key electronics through a circular antenna. A receiver receives the PATS validation signal and sends it back to the control module. The PCM then uses the information it receives to power up the fuel pump and injectors.
