Engine management control unit M010 controls and governs the entire electronic ignition and injection system.The ignition-operated power supply (15/54) arrives via a line protected by fuse F16 of the engine compartment junction unit B001 at pin 23 of connector B of M010 .The direct battery power supply arrives via a line protected by fuse F18 of the engine compartment junction unit B001 at pin 50 of connector B of M010 .Pins 1, 2 and 3 of connector B of M010 are earthed. Another injection control unit earth C060 is connected to the case of the same control unit (connector C).The main relay T09 of B001 controls the entire system: the coil receives a power supply from the line protected by fuse F18 of engine compartment juntion unit B001 and is energized by a control signal (earth) from pin 80 of connector B of control unit M010 and thus sends a power supply:- to pin 5 of connector B of the control unit (primary loads power supply), via the line protected by fuse F17 of B001 ;- to pins 4 and 6 of connector B of the actual control unit (injector supply), via the line protected by fuse F22 of B001;- to the Lambda sensor K040, to the heater plugs control unit M015 (pin 3 of connector B), to the EGR solenoid L030 and to the turbine variable geometry control solenoid L036 and to pin 5 of connector A of control unit M010, via the line protected by fuse F11 of B001.The fuel pump relay T10 of B001 is supplied by the line protected by fuse F21 of B001. The coil for relay T10 is connected to the contact board at the negative battery pole A001 (connector E); it provides the power supply for the electric fuel pump N040, which is earthed via the inertia switch I050, which interrupts the circuit in the case of an impact and stops the dangerous supply of fuel, by means of a (positive) signal coming from pin 85 of connector B of control unit M010..Control unit M015 that manages preheating of the heater plugs A040 is supplied - connector A - directly from the battery via a line protected by fuse F00 of control unit B001.It exchanges command and control signals with pins 70 and 74 of connector B of M010 and controls the timing. Connector C is connected to the heater plugs A040.The engine management control unit M010 receives signals from the various sensors in order to control all engine service parameters.The rpm sensor K046 provides engine rpm information via a frequency signal sent to pins 43 and 59 of connector A of control unit M010.Timing sensor K047 is supplied from pin 25 of connector A of M010 . It receives a reference earth from pin 21 of connector A of control unit M010 and on the way to this, a frequency signal corresponding to the phase at pin 56 of connector A.The engine coolant sensor K036 receives a reference earth from pin 29 of connector A of control unit M010 and sends a signal proportional to engine coolant temperature to pin 54 of connector A.The air flow meter K041 - with an ignition-controlled supply (INT) from fuse F37 of junction unit B002 - receives a reference earth from pin 27 of connector A of M010 and sends pin 14 of connector A a signal proportional to the air flow rate.An air temperature sensor inside K041 also sends an air temperature signal to pin 10 of connector A of M010 .Accelerator pedal K055 contains two built-in potentiometers (a main one and a safety one).The former receives power and earth signals from pins 83 and 35 of connector B of M010 and sends a corresponding signal to pin 65.The latter receives power and earth signals from pins 15 and 32 of connector B of M010 and sends a signal to pin 41.The fuel temperature sensor, incorporated in the diesel filter K101, detects the temperature of the incoming diesel fuel. It receives a reference earth from pin 61 of connector B of M010 and sends a fuel temperature signal to pin 13.The supercharging sensor K082 measures the pressure and the temperature in the intake chamber, downstream of the turbocharger. This is supplied by pin 23 of connector A of M010 and receives a reference earth from pin 24 of connector A. A signal corresponding to the pressure level is sent to pin 41 of connector A of the control unit, the signal corresponding to the temperature is sent to pin 37 of connector A.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 8 and 6 of connector B of M010 ; it then sends a pressure signal to pin 38.Lambda sensor K040 sends signals to pins 44, 46 and 47 of connector B of M010 while pin 45 supplies a reference earth. Sensor K040 is heated by a coil to ensure efficient operation even when cold. The coil is supplied by the line for fuse F11 of B001 and receives an earth signal from pin 12 of connector B of control unit M010.The fuel pressure regulator on the pump N077 controls the high pressure produced by the actual pump; the two control signals come from pins 4 and 20 of connector A of control unit M010.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 15 connector A 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 30 of connector A of M010.The throttle body solenoid L062 controls the opening of the throttle; it is supplied by a line protected by fuse F11 of B001 and is controlled by a signal from pin 60 connector A of M010.The engine management control unit sends the command to the injectors N070 from pins 16-47, 17-49, 31-48, 1-46 of connectorA of M010 for cylinders 1, 2, 3 and 4, respectively.Pin 92 of connector B of M010 receives the signal coming from the brake lights switch I030 - N.C. contact - with an ignition-controlled supply (INT) from fuse F35 of the junction unit under the dashboard B002; it receives the signal - N.A. contact - coming from the brake lights switch I030 with an ignition-controlled supply (INT) from fuse F37 of junction unit B002.The control unit M10 receives - at pin 9 of connector A - a signal from the minimum engine oil pressure sensor K030.The water in diesel filter sensor built into filter K101 receives an ignition-operated supply from fuse F37 of control unit B002 and sends a corresponding signal to pin 90 of connector B of M010. Pin 4 of K101 is connected to the contact board for the negative battery pole A001 (connector E).Engine control unit M010 (pins 40 and 64 of connector B) is connected, via the CAN, to the Body Computer M001 (pins 44 and 45 of connector D) and to the other network nodes; information concerning the following is sent through this connection:- engine coolant temperature, which is sent to the instrument panel E050 which manages the gauge and the warning light;- engine rpm, which is sent to the instrument panel E050 rev counter;- minimum engine oil pressure, which is sent to the 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 general failure warning light is activated if the engine oil pressure sensor or the water in the diesel filter is faulty or if the inertia switch I050 is activated.The engine control unit M010 receives the speedometer signal, produced by the ABS/ESP control unit M050, via the CAN.On versions without ABS/ESP (LOW trim level) the speedometer signal is supplied by the dedicated sensor K084: the latter receives an ignition-controlled supply (INT) along the line protected by fuse F35 of the junction unit under the dashboard B002 (pin 19 of connector A) and receives a reference earth via a Body Computer line M001 (pin 27 of connector D). Sensor K084 provides the Body Computer M001 (pin 10 of connector D) with the speedometer signal from pin 2 and this signal is forwarded to the other nodes involved via the CAN. See E4010 INSTRUMENT PANEL The control unit self-diagnostic system M010 generates a negative signal (pin 78 of connector B) that is connected directly to the EOBD warning light located in instrument panel E050 (pin 18) . The latter receives a power supply, at pin 3, from the ignition-controlled line (INT) protected by fuse F37 of B002.Engine control unit M060 is also connected:- from pins 7 and 8 of connector B for managing the engine cooling fan; See E5020 ENGINE COOLING - from pins 19, 20, 21 and 22 of connector B for managing the Cruise Control function; See E5060 CRUISE CONTROL- from pins 10, 37, 87, 79 and 28 of connector B for managing the compressor engagement function; See E6021 COMPRESSOR ENGAGEMENT - from pin 88 of connector B for the connection of the diagnostic line (K line). See E8010 DIAGNOSTIC MULTIPLE CONNECTOR