In the Key Learning special function menu, you will find the ““Module Initialization” option in the dropdown menu. This function helps you when replacing PATS modules. You need to install the appropriate for the vehicle second hand module, and than start the module initialization function, so that the module is programmed with the rest of the modules in the vehicle and the car would operate as supposed to. The software would suggest what needs to be done. With the next ignition on all modules would be synchronized