194001621 - E5030 PETROL ENGINE ELECTRONIC MANAGEMENT - OPERATIONAL DESCRIPTION

Engine management control unit M010 controls and governs the entire electronic ignition and injection system.The control unit M10 is supplied directly by the battery at pin 20 of connector A via a line protected by fuse F18 of the engine compartment junction unit B001he 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 19 of connector A.Main injection relay T9 of B001 controls the entire system: t is energized by an earth signal from pin 1 of connector A of engine control unit M010 and then forwards a power supply:- to injectors N070 and ignition module A031 - pin A - with interference filter P087 - through a line protected by fuse F22 of B001;- to vapour recovery solenoid L010, to the lambda sensors on the catalyic converter K017 and K018 and to the air flow meter K041, via a line protected by fuse F11 of B001;- to pins 48, 64 of connector A of control unit M010, via the line protected by fuse F17 of B001;Fuel pump relay T10 of B001 is supplied by the line of fuse F21 of B001.It is energized by a control signal coming from pin 51 of connector A of control unit M010 and provides the power supply for the electric fuel pump N040 which is earthed via the inertia switch I50 which interrupts the circuit in the case of an impact and stops the dangerous outflow of fuel. The NO contact of I050 is connected to the maxifuse control unit on the battery B099 to cut off the vehicle electrical supply in the event of impact.    See E5010 STARTING AND RECHARINGControl unit M010 receives signals from the various sensors in order to control all engine service parameters.Engine coolant sensor/sender unit K036 receives a reference earth from pin 38 of connector B of control unit M010 and sends a signal proportional to engine coolant temperature to pin 8 of connector B of the control unit.The detonation sensor K050 provides information, by means of frequency signals, concerning the onset of detonation in the combustion chamber: it receives a reference earth from pin 4 of connector B of M010 and sends the respective signal to pin 37 of control unit connector B. These signals are shielded.Engine rpm sensor K046 supplies information on engine speed and crankshaft angular position via a frequency signal sent to pins 23 (negative) and 26 (positive) of connector B: these two signals are very low intensity and are thus appropriately shielded.Absolute pressure sensor K048 erceives a positive and negative signal from pins 32 and 42 of connector B of control unit M010 and sends the corresponding signal to pin 12 of connector B of M010.The control unit M10 receives - at pin 15 of connector B - a signal from the minimum engine oil pressure sensor K30.Pin 54 of connector A of control unit M010 receives a signal from engine oil level sensor K032.Air flow meter (debimeter) K041 sends pin 29 of connector B a signal proportional to the air flow. K041 also contains an air temperature sensor: a reference earth is provided by pin 58 of connector B of M010, while pin 10 of connector B receives an air temperature signal.The Lambda sensor upstream of the catalyzer K017 and the one downstream K018 provide the control unit M010 with information concerning the correct composition of the air/fuel mixture.The sensor on the preconverter K017 sends a signal to pin 5 of connector B of M010, while pin 6 provides a reference earth. The sensor is heated by a coil to ensure correct operation even when cold, via an earth signal from pin 57 of connector B of M010.The sensor on the preconverter K018 sends a signal to pin 7 of connector B of M010, while pin 19 provides a reference earth. The sensor is heated by a coil to ensure correct operation even when cold, via an earth signal from pin 62 of connector B of M010.Fuel 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 is opened by the control unit when the motor is loaded via an earth signal from pin 17 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 29 and 34 of connector A and sends a correspondong signal to pin 12 of the same connector of M010. The latter receives power and earth signals from pins 50 and 44 of connector A of M010 and sends a corresponding signal to pin 13 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. Pins 47 and 64 of connector B of M010 control closure of the motorised throttle while pins 46 and 63 of the same connector control closure.Throttle body actuator N075 is equipped with two integral potentiometers: a main potentiometer and a stand-by potentiometer. The former receives power and earth signals from pins 30 and 34 of connector B and sends a correspondong signal to pin 28 of the same connector of M010. The latter receives power and earth signals from pins 31 and 35 of connector B of M010 and sends a corresponding signal to pin 25 of the same connector.Ignition module A031 - pin F - sends pin 18 of connector B of control unit M010 engine timing information to replace the typical timing sensor function.Engine management unit M010 controls the opening of individual injectors N070, via appropriate signals (duty-cycle type) sent from pins 33 (cyl.1), 49 (cyl.2), 51 (cyl.3), 50 (cyl.4) of connector B.Injectors N070 receive a supply to enable excitation of main relay T9 of B001.Ignition module A031 contains 2 coils that supply cylinders 1-4 and 2-3 respectively via command signals received - pins B and G - from pins 27 and 13 of connector B of M010. Pin E is earthed.Pin 38 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 27 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 22 of connector A of M010 receives a signal (earth) from clutch pedal switch I031.Control unit M010 then connects via the CAN network - pins 5, 6 and 37, 39 - 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.Control unit M010 receives a speedometer signal generated by the ESP control unit M051 via the CAN network.The control unit self-diagnostic system M10 also generates a negative signal that leaves pin 24 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 59 of connector A of M051 via the special diagnostic K line.