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Engine management control unit M010 controls and governs the entire electronic ignition and injection system. The ignition-operated power supply (15/54) arrives through a line protected by fuse F16 of the engine compartment junction unit B001 (pin 9 of connector C) at pin 54 of connector B of M010. Pins 2, 4 and 6 of connector B of M010 are connected to the injection control unit earth C060. The water in diesel filter sensor integrated in filter K101, the oil vapour heating resistance O007 (where provided) and the engine oil sensor signal control unit M186 (pin 4) are connected to the same earth. The main injection relay switch T09 of the control unit B001 manages the whole system: its coil is directly supplied by the battery through the line protected by fuse F18 of the engine compartment junction unit. This relay switch is energised by an (earth) control signal from pin 28 of connector B of the engine management control unit M010 and then forwards a power supply:
The oil vapour heating resistance (blow-by) O007 is controlled by relay switch T22 of B046. Its coil is activated by a negative signal supplied from pin 91 of connector B of M010. Pin 20 of B046 supplies resistance O007 and the relative engagement signal is sent to the engine management control unit M010 (pin 11 of connector B). Fuel pump relay switch T10 of B001 receives a direct battery supply through the line for fuse F21 of junction unit B001 itself. The coil is energised by pin 75 of connector B of the engine management control unit M010; the coil for relay switch T10 receives a reference earth, via pin 11 of connector C of the engine compartment junction unit B001, coming from the NC contact for the inertia switch I050 (pin 3). In the case of an impact the inertia switch opens, no longer supplying the reference earth to the coil for relay switch T10 and thereby interrupting the activation of the fuel pump N040 and the additional heating pump N044. See E6015 The engine management control unit M010 receives signals from the various sensors, thereby keeping all the engine operating parameters under control. The engine rpm sensor K046 provides engine rpm information via a frequency signal sent to pins 59 (positive) and 44 (negative) of connector A of control unit M010. Timing sensor K047 is supplied from pin 13 of connector A of M010; this receives a reference earth from pin 28 of connector A, and sends a signal with frequency corresponding to the phase to pin 14 of connector A of the control unit. Engine coolant temperature sensor/sender unit K036 receives a reference earth from pin 58 of connector A of engine control unit M010 and sends a signal proportional to engine coolant temperature to pin 57 of connector B of the control unit. The air flow meter K041 receives a reference earth from pin 20 of connector B of control unit M010 and sends a signal proportional to the air flow rate to pin 21 of connector B. An air temperature sensor inside K041 also sends an air temperature signal to pin 19 of connector B 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 16 and 38 of connector B of M010 and sends a corresponding signal to pin 60 of the same connector. The latter receives power and earth signals from pins 17 and 39 of connector B of M010 and sends a corresponding signal to pin 61 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 chokes and closes the throttle for example when the engine is turned off. It is controlled by a signal from pin 20 connector A of M010. Pins 21 and 22 of connector A of M010 manage the solenoid valve control function. The water in diesel filter sensor, integrated in the diesel filter K101, receives an ignition-operated supply (INT) from fuse F51 of the Body Computer M001 (pin 4 of connector C) and is connected to the earth C060, sending the corresponding signal to pin 30 of connector B of control unit M010. 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 65 of connector B of control unit M010 and sends a fuel temperature signal to pin 87. Sensor K044 measures the air pressure and the temperature in the intake chamber, downstream of the turbocharger. It is supplied by pin 10 of connector A of control unit M010 and receives a reference earth from pin 25 of the same connector. The signal corresponding to the pressure value is sent to pin 40 of control unit connector A of control unit M010. An air temperature sensor, housed in K044, sends a signal to pin 55 of connector A 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 respectively from pins 11 and 26 of connector A of engine control unit M010 and then sends a pressure signal to pin 41 of the same connector. The oxygen sensor K040 sends signals to pins 63, 64 and 86 of connector B of control unit M010 while pin 85 supplies a reference earth. Sensor K040 is heated by a coil to ensure efficient operation even when cold. The resistance is supplied by the line protected by fuse F17 of B001 and receives an earth signal from pin 7 of connector B of control unit M010. The fuel pressure regulator N077 on the pump controls the high pressure produced by the pump itself; the two control signals come from pins 60 (negative) and 15 (positive) of connector A of control unit M010. EGR solenoid valve L030 controls the exhaust gas recirculation. The EGR solenoid valve L030 is controlled by two signals (positive and negative) from pins 50 and 35 of connector A of M010; the position sensor integrated into the solenoid valve L030 receives a power supply and earth from pins 9 and 24 and returns a position signal to pin 39 of connector A of M010. The wastegate solenoid valve L037 adjusts the turbocharger operation according to the engine load: it is controlled by a negative signal from pin 93 of connector B of control unit M010. The heat exchanger water supply actuator control solenoid valve for EGR L103 is controlled by a negative signal from pin 19 of connector A of M010. The control unit M010 receives, at pin 54 of connector A, the signal from the minimum engine oil pressure sensor K030. The engine oil sensor signals control unit M186 receives an ignition-controlled power supply (INT) at pin 1, through the line protected by fuse F51 located in the Body Computer M001 (pin 7 of connector C); it receives the information from the engine oil level sensor K032, at pins 3 (positive) and 6 (negative) and sends these signals, from pins 2 (oil level signal) and 5 (earth signal) to the control unit M010 (pins 6 and 5 of connector A respectively). Engine control unit M010 controls the opening of the individual injectors N070, via appropriate signals (positive and negative respectively) sent from pins 16-32 (cyl.1), 2-46 (cyl.2), 1-31 (cyl.3), 17-48 (cyl.4) of connector A. The heater plug control unit M015 is supplied at pin 5 of connector A, directly from the battery through the line protected by fuse F02 of the engine compartment junction unit B001 (pin B of connector B) Pin 3 of connector A of M015 receives a reference earth to manage the pre-heating function from the engine management control unit M010 (pin 89 of connector B). Control unit M015 exchanges command and control (feedback) signals from pins 2 and 1 of connector A with pins 26 and 67 of connector B of control unit M010 which controls the timed delay. Connector B of M015 is connected to the heater plugs A040. Pin 88 of connector B of control unit M010 receives an NO signal from the switch on brake pedal I030, provided by an ignition-operated supply (INT) via the line protected by fuse F42 of the Body Computer M001. The latter receives the same signal at pin 57 of connector D. Body Computer M001 receives an NC signal from the switch on brake pedal I030 at pin 11 of connector D. This also has an ignition-operated supply (INT) via a line protected by fuse F37 of the Body Computer. The latter forwards this signal to the control unit M010 through the C-CAN. The clutch pedal switch I031, with analogue potentiometer, receives supply and reference earth respectively from pins 15 and 37 of connector B of the engine management control unit M010 and provides the pedal position signal (from maximum extension with pedal pressed to pedal released position) to pin 59 of the same connector. The control unit M010 is then connected via the CAN - pins 24 and 25 of connector B - to the Body Computer M001 - pins 38 and 37 of connector D - and to the other network nodes; information is sent, via this connection, for the management of the indicators and warning lights in the instrument panel E050, in particular for the management of:
The control unit M010 receives a speedometer signal generated by the braking system control unit M051 via the C-CAN. It is also connected:
See E5020
See E6021
See E5070 PARTICLE FILTER SYSTEM
See E5010 STARTING AND RECHARING
See E2022 |