The engine management control unit M10 controls and manages the DPF system with the help of 2 special sensors:- downstream particle filter temperature sensor K190;- DPF differential pressure sensor K187.Sensor K190 receives an earth signal from the engine management control unit M10 - pin 11 of connector A - and sends the temperature signal to pin 91 of connector A of M10.Sensor K187 receives a power supply and an earth signal from the engine management control unit M10 - pin 14 and 33 of connector A - and sends the pressure signal to pin 49 of connector A of M10.The control unit M10 sends, via the B-CAN - pins 58 and 59 of connector A, the signals useful for the display of the warnings lights and messages in the instrument panel E50. This communicates with the system - pins 8 and 9 of connector A - producing the filter regeneration (particulate trap blocked) process management signals or indicating that filter regeneration is not possible (fault in EOBD).