323002812 - E5030 PETROL ENGINE ELECTRONIC MANAGEMENT - FUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTION

Engine management control unit M010 controls and governs the entire electronic ignition and injection system.The control unit M010 receives a direct supply from the battery at pin 70 of connector B via the line protected by fuse F18 of junction unit B001.The ignition-operated power supply (15/54) arrives via a line protected by fuse F16 of the engine compartment junction unit B001 at pin 6 of connector B of M010 .Pins 1, 2, and 4 of connector B of M010 are earthed via the contact board at the negative battery pole A001 (connector E).The main injection relay T09 of B001 controls the entire system: t is energized by an earth signal from pin 72 of connector B of control unit M010 and then forwards a power supply:- to pins 5 and 3 of connector B of the actual control unit, via the line protected by fuse F17 of B001;- to fuel vapour recovery solenoids L010, Waste Gate L037 and turbocharger by-pass L102, as well as Lambda sensors K015 and K017 (all these lines are protected by fuse F11 of B001);- to coils A030 and injectors N070 via a line protected by fuse F22 of B001.The fuel pump relay T10 of B001 is supplied by the line for fuse F21 of B001 located in B001.It is energized by a (positive) control signal coming from pin 68 of connector B of control unit M010 and 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 supply of fuel.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 37and 38 of connector A of control unit M010.Timing sensor K047 is supplied from pin 11 of connector A di M010 ; this receives a reference earth from pin 28 of connector A, and sends a signal with frequency corresponding to the phase to pin 12 of connector A of the control unit.The air pressure/temperature sensor K044 receives a reference earth from pin 44 of connector A; it sends a signal corresponding to intake air temperature to pin 24 of the control unit. Pin 9 of connector A of M10 sends a power supply to sensor K044, which returns a signal proportional to intake air pressure to pin 25.Turbocharging sensor K82 receives a reference earth from pin 44 of connector A and a power supply from pin 9 of connector A of M010, and returns a signal proportional to turbocharging pressure to pin 21.The engine temperature sender unit 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 43 of connector A of the control unit.The Lambda sensor on the pre-converter K015 and the one on converter K017 provide the control unit M010 with information concerning the correct composition of the air-fuel mixture.The sensor K015 sends a signal to pin 55 of connector A of the control unit, while pin 52 provides a reference earth: these two signals are very low intensity and are thus appropriately shielded. Sensor K015 is heated by a resistance to ensure correct operation even when cold; the resistance is supplied by the main relay T09; pin 16 of connector A of M010 provides the reference earth.The sensor K017 sends a signal to pin 53 of connector A of the control unit, while pin 54 provides a reference earth: these two signals are very low intensity and are thus appropriately shielded. Sensor K017 is heated by a resistance to ensure correct operation even when cold; the resistance is supplied by the main relay T09; pin 1 of connector A of M010 provides the reference earth.The detonation sensor K050 provides information, by means of frequency signals, concerning the onset of detonation in the combustion chamber: it sends two signals to pins 36 and 51 of connector A of M010 ; these signals are also appropriately shielded.Accelerator pedal K055 contains two built-in potentiometers (a main one and a safety one). The former receives power and earth signals from pins 49 and 30 of connector B of M010 and sends a corresponding signal to pin 79 of the same connector. The latter receives power and earth signals from pins 27 and 29 of connector B of M010 and sends a corresponding signal to pin 55 of the same connector.The control unit M10 receives - at pin 35 of connector A - a signal from the minimum engine oil pressure sensor K030.Pin 82 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 at pin 87 of connector B.Pin 63 of connector B of M010 receives the signal coming from the clutch switch I031.The control unit M010 controls the opening of the injectors N70 by means of special signals sent by pins 17 (cylinder 1), 14 (cylinder 2), 2 (cylinder 3) and 19 (cylinder 4) of connector B of M010. The injectors N70 receive a power supply to enable the opening of the main relay T09 of B001.Control unit M010 also controls the coils A30 via control signals for the primary winding of the coil, while the secondary winding sends a pulse to the spark plugs: from pins 31, 48, 46 and 47 of connector A of M010. The primary windings of coils A030 receive a power supply to enable opening of main relay T09 of B001 .Throttle body actuator N075 is equipped with two built-in potentiometers connected in parallel: this controls the throttle opening by means of a step motor.The motor receives a power supply from pins 49 and 50 of connector A of M010. Pin 10 of connector A sends power to both potentiometers, while pin 13 sends an earth signal to the potentiometers; pins 42 and 22 of the same connector receive signals that reach throttle body actuator N075Fuel vapour recovery solenoid L010 allows fuel vapours to flow through toward the engine intake, where they join the mixture that is entering the combustion chamber. Valve L010, supplied by the main relay T09 of B001, is opened by the control unit when the engine is operating in load conditions by means of a signal from pin 3 of connector A of M010.The turbo pressure solenoid L037 regulates the turbocharger Waste Gate mechanical valve; solenoid L037 is supplied by main relay T09 of B001 and is controlled by the control unit via a signal from pin 18 of connector A of M010.The by-pass solenoid of turbocharger L102 - connected to the intake pipe near the throttle body - allows excess pressure to be released during over-run. This helps to avoid excessive pressure increases (hammer) that could damage the intake pipes and interfere with turbine operation.It is supplied by the main relay T09 of B001 and is controlled by the control unit via a signal from pin 5 of connector A of M010.The engine management control unit M010 (pins 88 and 89 of connector B) is connected, via the CAN, to the Body Computer M001 (pins 44 and 54 of connector D) and to the other network nodes; it receives information concerning the following via 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;The general failure warning light is activated if the engine oil pressure sensor is faulty or if the inertia switch I050 is activated.The engine management control unit M010 receives the speedometer signal, produced by the ABS/ESP control unit M050, via the CAN.The control unit self-diagnostic system M010 also generates a negative signal (pin 71 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 M010 is also connected:- from pins 12 and 13 of connector B for managing the engine cooling fan;    See E5020 ENGINE COOLING - from pins 61, 84, 85 and 86 of connector B for managing the Cruise Control function;    See E5060 CRUISE CONTROL- from pins 7, 11, 28, 57 and 64 of connector B for managing the compressor engagement function;    See E6021 COMPRESSOR ENGAGEMENT - from pin 91 of connector B for the connection of the diagnostic line (K line).    See E8010 DIAGNOSTIC MULTIPLE CONNECTOR