Engine management control unit M010 controls and governs the entire electronic ignition and injection system.The ignition-operated power supply (15/54 from the steering lock control unit) is received from a line protected by fuse F16 of B001 at pin 28 of connector A.Main injection relay T9 of B001 controls the entire system: it is energized by an earth signal from pin 72 of connector A of engine control unit M010 and then forwards a power supply:- to pin 1 of connector A of the control unit, via the line protected by fuse F17 of B001 ;- to pin 5 of connector A of the control unit, via the line protected by fuse F22 of B001 ;- to the heater plugs control unit M015 (pin 3 of connector A) to the solenoid valves L030, L036,and the one in the throttle body actuator N075, via the line protected by fuse F11 of B001.Fuel pump relay T10 of B001 is supplied by the line protected by fuse F21 of B001.This is energized by a command signal (earth) from pin 91 of connector A of M010 and supplies power to fuel pump N040 , which is earthed via inertia switch I050 , that cuts off the circuit in the case of impact and thus prevents dangerous flows of fuel.Pins 2, 4, 6 of connector A are earthed.Diesel preheating relay T19 of B001 is supplied by the line protected by fuse F20 of B001.It is energized by a control signal (earth) from pin 68 connector A of M010 and supplies power to diesel heating resistance inside K100.Control unit M015 that manages preheating of the heater plugs A040 is supplied directly from the battery via a line protected by maxifuse F72 of the control unit on the battery B099.This is supplied at connector A - from the line protected by fuse F11 of B001, and exchanges command and control signals with pins 52 and 93 of connector A of M010, which controls the timing; connector C is connected to the heater plugs A040.Control unit M010 receives signals from the various sensors in order to control all engine service parameters.Engine rpm sensor K046 supplies, via frequency signal0 exchanged with pins 12 and 27 of connector B of M010, information on engine speed.Timing sensor K047 is supplied from pin 11 of connector B of M010 . It receives a reference earath from pin 20 of connector B of control unit M010 and sends a frequency signal corresponding to the phase at pin 50 of connector B.Engine coolant sensor/sender unit K036 receives a reference earth from pin 41 of connector B of control unit M010 and sends a signal proportional to engine coolant temperature to pin 58 of connector B of the control unit.The control unit M10 receives - at pin 56 of connector B - a signal from the minimum engine oil pressure sensor K30.The control unit M010 receives the signal, at pin 21 of connector B, coming from the engine oil level sensor K032.The air flow meter K41 - receiving an ignition-controlled supply (INT from the steering lock control unit) via the line protected by fuse F35 of junction unit B002 - receives a reference earth from pin 44 of connector B of M010 and sends pin 42 of connector B a signal proportional to the air flow rate. An air temperature sensor inside K041 also sends an air temperature signal to pin 37 of connector B of M010 .Accelerator pedal K055 is equipped with two built-in potentiometers: a main potentiometer and a stand-by potentiometer. The former receives power and earth signals from pins 30 and 45 of connector A and sends a correspondong signal to pin 9 of the same connector of M010. The latter receives power and earth signals from pins 46 and 8 of connector A of M010 and sends a corresponding signal to pin 31 of the same connector.According to the signal from accelerator pedal K055, control unit M010 controls the throttle opening by means of a motor built into throttle body N075. The internal solenoid valve reduces and closes the throttle opening, e.g. when the engine is turned off. It is supplied by a line protected by fuse F11 of B001 and is controlled by a signal from pin 59 connector B of M010. An earth and a power supply for the management of the motorized throttle are sent from pins 39 and 52 of connector B of M010 respectively.Fuel temperature sensor K100 detects the temperature of the incoming diesel fuel. It receives a reference earth from pin 10 of connector A of M010 and sends a fuel temperature signal to pin 11.The supercharging sensor K044 measures the pressure and the temperature in the intake chamber, downstream of the turbocharger. It is supplied by pin 13 of connector B of M010 and receives a reference earth from pin 23 of connector B. The signal corresponding to the pressure value is sent to pin 40 of control unit connector B. An air temperature sensor, housed in K044, sends a signal to pin 53 of connector B of M010.Fuel pressure sensor K083 supplies the injection control unit with a feedback signal to modulate injection pressure and duration. It receives power and a reference earth from pins 28 and 8 of connector B of M010; it then sends a pressure signal to pin 43 of connector B of M010.Fuel pressure regulator N077 maintains fuel pressure constant in the accumulator. The two control signals come from pins 19 (positive) and 49 (negative) of connector B of control unit M010.The fuel pressure regulator in the rail N087 receives two control signals from pins 4 (positive) and 34 (negative) of connector B of control unit M010.The EGR solenoid L030 controls exhaust gas recirculation. It is supplied by a line protected by fuse F11 of B001 and is controlled by a signal from pin 60 of connector B of M010 .The turbine variable geometry solenoid valve L036 regulates the operation of the turbine depending on the engine load: it is supplied by the line for fuse F11 of B001 and is controlled by a signal from pin 7 of connector A of M010.The water in the diesel filter sensor K031 receives an ignition-operated power supply (INT from the steering lock control unit) via the line protected by fuse F35 of junction unit B002; it sends a signal relating to the presence of water in the diesel filter to pin 74 of connector A.Engine management unit M010 controls the opening of individual injectors N070, via appropriate signals sent from pins 16-47 (cyl.1), 2-31 (cyl.2), 1-46 (cyl.3), 17-33 (cyl.4) of connector B.Pin 17 of connector A of control unit M010 receives an NO signal from the switch on brake pedal I030, supplied by an ignition-controlled supply (INT from the steering lock control unit) via a line protected by fuse F37 of junction unit B002.Pin 80 of connector A of control unit M010 receives an NC signal from the switch on brake pedal I030, also supplied by an ignition-controlled supply (INT from the steering lock control unit) via a line protected by fuse F35 of junction unit B002.Pin 79 of connector A of M010 receives a signal (earth) from clutch pedal switch I031.Control unit M010 then connects via the CAN network - pins 61, 62 and 83, 84 - to Body Computer M001 - pins 36 and 37 of connector B - and to the other network nodes. Via this connection, it sends information on:- coolant temperature, which is sent to instrument panel E50 that controls the gauge and warning light;- engine rpm, that is sent to the rev counter on instrument panel E50;- minimum engine oil pressure, which is sent to instrument panel E50 that controls the warning light.- heater plugs pre-heating, which is sent to instrument panel E050 that controls the warning light;- water in the diesel filter, which is sent to instrument panel E050 that controls the warning light;The control unit M010 receives the speedometer signal produced by the ABS/ESP control unit M051 via the CAN.The control unit self-diagnostic system M10 also generates a negative signal that leaves pin 71 of connector A - that is connected directly to the EOBD warning light located in instrument panel E050 .The check function within instrument panel E050 monitors the operation of the inertia switch and checks for faults in the oil pressure sensor: If faults are detected, the general failure warning light is turned on and the information is shown simultaneously on the display.The control unit autodiagnostic data can be read by connecting to connector C of M001, pin 7: it receives signals from pin 25 of connector A of M051 via the special diagnostic K line.