WIRING DIAGRAM - PETROL ENGINES ELECTRONIC MANAGEMENT - Fiat BRAVO 1.4 16v
COMPONENTS - PETROL ENGINES ELECTRONIC MANAGEMENT - Fiat BRAVO 1.4 16v
| Component code | Description | Reference to the operation |
| A030 | IGNITION COIL | |
| B001 | JUNCTION UNIT | |
| B002 | JUNCTION UNIT UNDER DASHBOARD | |
| B099 | MAXI FUSE BOX ON BATTERY | - |
| C010 | LEFT FRONT EARTH | - |
| C020 | PASSENGER SIDE DASHBOARD EARTH | - |
| C038 | EARTH ON CENTRE TUNNEL | - |
| C040 | ENGINE EARTH | - |
| D001 | FRONT/DASHBOARD COUPLING | - |
| D004 | FRONT/ENGINE COUPLING | - |
| D081 | INJECTOR JUNCTION | - |
| E050 | INSTRUMENT PANEL | |
| H001 | IGNITION SWITCH | |
| I030 | BRAKE PEDAL SWITCH | |
| I031 | CLUTCH PEDAL SWITCH | |
| I050 | INERTIA SWITCH | |
| K015 | LAMBDA SENSOR ON PRE-CATALYZER | |
| K017 | LAMBDA SENSOR ON CATALYZER | |
| K030 | ENGINE OIL PRESSURE SENSOR (SWITCH) | |
| K036 | ENGINE COOLANT TEMPERATURE SENSOR/SENDER UNIT | |
| K043 | INTEGRATED AIR TEMPERATURE SENSOR | |
| K046 | RPM SENSOR | |
| K047 | TIMING SENSOR | |
| K050 | DETONATION SENSOR | |
| K055 | ACCELERATOR PEDAL POTENTIOMETER | |
| L010 | FUEL VAPOUR RECOVERY SOLENOID VALVE | |
| M001 | BODY COMPUTER | |
| M010 | ENGINE MANAGEMENT ECU | |
| N040 | FUEL PUMP AND LEVEL GAUGE | |
| N070 | INJECTOR | |
| N075 | BUILT-IN THROTTLE BODY ACTUATOR | |
| R010 | MULTIPLE TESTER CONNECTION | - |
COMPONENT LOCATION - PETROL ENGINES ELECTRONIC MANAGEMENT - Fiat BRAVO 1.4 16v
| Component code | Description | Reference to the operation |
| A030 | IGNITION COIL | |
| B001 | JUNCTION UNIT | |
| B002 | JUNCTION UNIT UNDER DASHBOARD | |
| B099 | MAXI FUSE BOX ON BATTERY | - |
| C010 | LEFT FRONT EARTH | - |
| C020 | PASSENGER SIDE DASHBOARD EARTH | - |
| C038 | EARTH ON CENTRE TUNNEL | - |
| C040 | ENGINE EARTH | - |
| D001 | FRONT/DASHBOARD COUPLING | - |
| D004 | FRONT/ENGINE COUPLING | - |
| D081 | INJECTOR JUNCTION | - |
| E050 | INSTRUMENT PANEL | |
| H001 | IGNITION SWITCH | |
| I030 | BRAKE PEDAL SWITCH | |
| I031 | CLUTCH PEDAL SWITCH | |
| I050 | INERTIA SWITCH | |
| K015 | LAMBDA SENSOR ON PRE-CATALYZER | |
| K017 | LAMBDA SENSOR ON CATALYZER | |
| K030 | ENGINE OIL PRESSURE SENSOR (SWITCH) | |
| K036 | ENGINE COOLANT TEMPERATURE SENSOR/SENDER UNIT | |
| K043 | INTEGRATED AIR TEMPERATURE SENSOR | |
| K046 | RPM SENSOR | |
| K047 | TIMING SENSOR | |
| K050 | DETONATION SENSOR | |
| K055 | ACCELERATOR PEDAL POTENTIOMETER | |
| L010 | FUEL VAPOUR RECOVERY SOLENOID VALVE | |
| M001 | BODY COMPUTER | |
| M010 | ENGINE MANAGEMENT ECU | |
| N040 | FUEL PUMP AND LEVEL GAUGE | |
| N070 | INJECTOR | |
| N075 | BUILT-IN THROTTLE BODY ACTUATOR | |
| R010 | MULTIPLE TESTER CONNECTION | - |
DESCRIPTION - PETROL ENGINES ELECTRONIC MANAGEMENT - Fiat BRAVO 1.4 16v
An electronic control system supervises and governs all engine parameters to optimise performance and fuel consumption by means of a real-time response to different service conditions.The system is managed by a single control unit which controls both ignition and injection.
FUNCTIONAL DESCRIPTION - PETROL ENGINES ELECTRONIC MANAGEMENT - Fiat BRAVO 1.4 16v
Engine management control unit M10 controls and governs the entire electronic ignition and injection system.Control unit M10 is supplied directly from the battery at pin 18 of connector A, via a line protected by fuse F18 junction unit B1 .The ignition-operated power supply arrives via a line protected by fuse F16 of the engine compartment junction unit B1 at pin 51 of connector A of M10 .Main injection relay T9 of B1 controls the entire system: it is energized by an earth signal from pin 19 of connector A of control unit M10 and then forwards a power supply:- to pins 17, 49 and 33 of connector A of the actual control unit, via the line protected by fuse F17 of B1;- to fuel vapour recovery solenoid L10 and to lambda sensors K15 and K17 (all these lines are protected by fuse F11 of B1;- to coils A30 and injectors N70 via a line protected by fuse F22 of B1.Fuel pump relay T10 of B1 is supplied by the line protected by fuse F21 of B1.It is energized by a control signal coming from pin 62 of connector A of control unit M10 and provides the power supply for the electric fuel pump N40 which is earthed via the inertia switch I50 which interrupts the circuit in the case of an impact and stops the dangerous supply of fuel.The engine management control unit M10 receives signals from the various sensors, thereby keeping all the engine operating parameters under control.The rpm sensor K46 provides information, via a frequency signal sent to pins 10 and 42 of connector B of the control unit M10, about the engine speed.Timing sensor K47 is supplied from pin 7 of connector B of control unit M10 ; this receives a reference earth from pin 9 of connector B, and sends a signal with a frequency corresponding to the phase to pin 36 of connector B of the control unit.Integrated air temperature sensor K43 receives a reference earth from pin 26 of connector B; it sends a signal corresponding to intake air temperature to pin 55 of the control unit. Pin 7 of connector B of M10 sends a reference power supply to sensor K43 , which returns a signal proportional to intake air pressure to pin 6.The engine temperature sender unit K36 receives a reference earth from pin 9 of connector B of the control unit M10 and provides a signal proportional to the temperature of the engine coolant at pin 38 of connector B of the control unit.The Lambda sensor on pre-converter K15 and the one on catalyzer K17 provide control unit M10 with information concerning the correct composition of the air-fuel mixture.Sensor K15 sends a signal to pin 8 of connector B of the control unit, while pin 25 provides a reference earth: these two signals are very low intensity and are thus appropriately shielded. Sensor K15 is heated by a resistance to ensure correct operation even when cold; the resistance is supplied by the main relay T9; pin 49 of connector B of M10 provides the reference earth.Sensor K17 sends a signal to pin 57 of connector B of the control unit, while pin 41 provides a reference earth: these two signals are very low intensity and are thus appropriately shielded. Sensor K17 is heated by a resistance to ensure correct operation even when cold; the resistance is supplied by the main relay T9; pin 17 of connector B of M10 provides the reference earth.By means of frequency signals, knock sensor K50 provides information concerning the onset of detonation in the combustion chamber: it sends two signals to pins 37 and 21 of connector B of M10 ; these signals are also appropriately shielded.Accelerator pedal K55 has two built-in potentiometers (a main one and a safety one). The former receives power and earth signals from pins 21 and 22 of connector A of M10 and sends a corresponding signal to pin 22 of the same connector. The latter receives power and earth signals from pins 4 and 5 of connector A of M10 and sends a corresponding signal to pin 37 of the same connector.The control unit M10 receives - at pin 42 of connector A - a signal from the minimum engine oil pressure sensor K30Pin 25 of connector A of M10 receives the signal coming from the brake lights switch I30 - N.A. contact - with an ignition-controlled supply (INT) from fuse F37 of junction unit B2; it receives the signal - N.C. contact - coming from the brake lights switch I30 at pin 57 of connector A of M10 with an ignition-controlled supply from fuse F35 of junction unit B2.Pin 7 of connector A of M10 receives the signal coming from the clutch switch I31.The control unit M10 controls the opening of the injectors N70 by means of special signals sent by pins 51, 18, 2 and 34 of connector B of M10. The injectors N70 receive a power supply to enable the opening of the main relay T9 of B1 .Control unit M10 also controls 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 32, 16, 31 and 15 of connector B of M10. The primary windings of coils A30 receive a power supply to enable opening of main relay T9 of B1 .The throttle body actuator N75 has two built-in potentiometers connected in parallel: this controls the throttle opening by means of a step motor.The motor receives a supply from pairs of pins 11-43 and 28-60 of connector B of M10 . Pin 15 of connector B sends power to both potentiometers, while pin 58 sends an earth signal to the potentiometers; pins 23 and 39 of the same connector receive signals that reach throttle body actuator N75.The fuel vapour recovery solenoid L10 allows the flow of fuel vapours to the engine intake, where they are added to the mixture entering the combustion chamber. Valve L10 is supplied from main relay T9 of B1 ; it is opened by the control unit when the engine is loaded via a signal from pin 33 of connector B of M10 .The autodiagnostic data can be read by connecting to connector C of the Body Computer M1 - pin 7: signals arrive from pin 2 of connector A from the control unit M10 via the special diagnostic lineOn right hand drive versions there is also diagnostic connector R10 separated from the Body Computer.The autodiagnostic system for the control unit M10 also produces a signal - which leaves pin 31 of connector A - which is connected directly to the EOBD warning light in the instrument panel E50.The control unit M10 is then connected via the CAN to the Body Computer M1 and to the other network nodes: information on the following is sent through this connection- engine coolant temperature, which is sent to the instrument panel E50 which manages the gauge and the warning light;- engine rpm, which is sent to the instrument panel E50 rev counter;- minimum engine oil pressure, which is sent to the instrument panel E50 which manages the warning light;It receives the speedometer signal, via the CAN, produced by the ABS control unit M50.
