Engine management control unit M010 controls and governs the entire electronic ignition and injection system.A battery-controlled supply ( < R1 > ) reaches the engine management control unit (pin 1 of connector A) via relay R09 and fuse F17 of the engine compartment junction unit B001. See E1010 SUPPLYAn ignition-operated supply (15/54) is received at pin 28 of connector A from a line protected by fuse F16 of control unit B001.The main injection relay R09 (inside B001) controls the entire system: t is excited by an earth signal from pin 72 of connector A of engine control unit M010 and then forwards a power supply:
to pin 5 of connector A of the control unit via lines protected by fuse F22 of B001;
along the line protected by fuse F11 to air flow meter K041, to water in diesel filter sensor K031, to glow plug preheating control unit M015, to wastegate valve L037, to EGR valve L030, to throttle body solenoid L062 and to the coil of heated diesel filter relay R19 inside the engine compartment junction unit B001;
Heated diesel filter relay R19 is supplied from the battery via a line protected by fuse F20 of engine bay control unit; this is excited by an earth signal from pin 68 of connector A of M010 and controls the operation of diesel heating coil O020: the thermal contact inside the coil is connected to pins 10 and 11 of B of engine control unit M010. It deactivates the system once the diesel is warm enough.Fuel pump relay R10 inside junction unit B001, whose coil is excited by an earth signal from engine control unit M010 (pin 91 of connector A), supplies fuel pump N040 via a line protected by fuse F21 of B001; pump N040 is connected to earth via inertia switch I050 that interrupts the circuit and thus stops the fuel supply in the case of impact. See E6015 ADDITIONAL HEATERControl unit M015 that manages preheating of glow plugs A040 is supplied directly from the battery via a line protected by fuse F61 of control unit B001. This receives preheating commands (connector A) form pins 93 and 52 of connector A of control unit M010. The power supply to the five glow plugs A040 leaves from connector C of M015.Control unit M010 receives signals from the various sensors in order to control all engine service parameters.RPM sensor K046 provides engine rpm information via a frequency signal sent to pins 27 and 12 of connector B: hese two signals are very low intensity and are thus appropriately shielded.Timing sensor K047 is supplied from pin 11 of connector B of control unit M010 and receives a reference earth from pin 20 of connector B; this sensor in turn sends the control unit a frequency signal corresponding to phase (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.Air flow meter (debimeter) K041 receives a reference voltage from pin 29 of connector B of engine management unit M010 and sends a signal proportional to air flow to pin 37 of connector B. K041 also contains an air temperature sensor: a reference earth is provided by pin 44 of connector B of M010, while pin 42 of connector B receives an air temperature signal.The engine management control unit M010 controls the opening of the individual injectors N070, via special (duty-cycle) type signals sent to pin 47 (cyl. A), 31 (cyl. B), 46 (cyl. C), 33 (cyl. D), 48 (cyl. E) of connector B.The injectors N070 receive an enablement supply from the control unit M010 from pin 16 (cyl. A), 2 (cyl. B), 1 (cyl. C), 17 (cyl. D) and 18 (cyl. E) of connector B.Turbocharging sensor K082 measures turbocharging pressure. It is supplied and receives a reference earth from pins 13 and 23 of connector B of M010, respectively and still interfaces at pins 40 and 53.The engine control unit receives a signal from water in fuel filter sensor K031 at pin 74 of connector B.Fuel pressure regulator N077 maintains fuel pressure constant in the accumulator. The two control signals come from pins 4 and 34 of connector B of control unit M010.Fuel pressure sensor 083 is responsible for sending the engine control unit a feedback signal to regulate injection pressure and duration. This receives a supply and reference earth from pins 28 and 8 of connector B of M010, and sends its own signal to pin 43 of the same connector.Linear sensor K120 is connected to control unit M010 at pins 22 e 12 of connector A for power supply and earth and pin 13 for transmission of its own signal.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 46 and 30 of connector A and sends a correspondong signal to pin 31 of the same connector of M010. The latter receives power and earth signals from pins 45 and 8 of connector A of M010 and sends a corresponding signal to pin 9 of the same connector.Throttle body solenoid L062 sends a signal to pin 59 of connector A of engine control unit M010 to ensure the throttle is correctly controlled.Waste-gate L037 determines turbine air pressure values according to accelerator pedal pressure; engine control unit M010 is connected to the solenoid from pin 15 of connector A.Solenoid EGR L030 controls exhaust gas recirculation. This is connected to the engine control unit at pin 60 of connector A.The engine oil level sensor K032 receives a supply from 17 of connector B of the instrument panel E050 and sends pin 18 of the same connector a signal which switches on the insufficient oil level warning light.Pin 80 of connector A of the engine management unit receives a signal from the normally closed brake light switch I030, while pin 17 receives a signal from the normally closed switch See E2021 BRAKE LIGHTSPin 79 of connector A of M010 receives an earth signal via a contact on clutch pedal switch I031.The engine control unit receives a signal from low engine oil pressure switch K030 at pin 35 of connector B.Control unit M010 is then connected via the C-CAN network (pins 83 and 84 of connector A) to Body Computer M001 (pins 32 and 33 of connector B) and the other network nodes; it uses this connection to send information on engine coolant temperature, engine rpm, water in diesel filter, glow plug preheating, EOBD engine control system faults and engine oil pressure ( < R1 > ). It also receives a speedometer signal generated by M051 (pins 1 and 2) via the C-CAN network (pins 61 and 62 of connector A). See E4010 INSTRUMENT PANEL