Fiat GRANDE PUNTO 1.3 Multijet – DIESEL ENGINES ELECTRONIC MANAGEMENT – – 90 CV – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

WIRING DIAGRAM - DIESEL ENGINES ELECTRONIC MANAGEMENT - Fiat GRANDE PUNTO 1.3 Multijet

DIESEL ENGINE ELECTRONIC MANAGEMENT WIRING DIAGRAM Fiat GRANDE PUNTO 1.3 Multijet

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COMPONENTS - DIESEL ENGINES ELECTRONIC MANAGEMENT - Fiat GRANDE PUNTO 1.3 Multijet

Component code	Description	Reference to the operation
A040	HEATER PLUGS
B001	JUNCTION UNIT
B099	MAXI FUSE BOX ON BATTERY
C001	BATTERY EARTH	-
C010	LEFT FRONT EARTH	-
C015	DASHBOARD EARTH, DRIVER'S SIDE	-
D020	DASHBOARD/REAR COUPLING	-
D029	ENGINE CABLES/ENGINE SERVICES CABLE COUPLING	-
D107	DASHBOARD-REAR/ENGINE SERVICES COUPLING	-
E050	INSTRUMENT PANEL
I020	REVERSING LIGHTS SWITCH
I030	BRAKE PEDAL SWITCH
I031	CLUTCH PEDAL SWITCH
I050	INERTIA SWITCH
K030	LOW ENGINE OIL PRESSURE SENSOR (SWITCH)
K036	ENGINE COOLANT TEMPERATURE SENSOR/SENDER UNIT
K040	LAMBDA SENSOR
K041	AIR FLOW METER
K046	RPM SENSOR
K047	TIMING SENSOR
K055	ACCELERATOR PEDAL POTENTIOMETER
K082	SUPERCHARGING SENSOR
K083	FUEL PRESSURE SENSOR
K101	FUEL TEMPERATURE AND WATER IN FUEL FILTER SENSOR
L030	EGR SOLENOID VALVE
L036	TURBINE VARIABLE GEOMETRY CONTROL SOLENOID VALVE
M001	BODY COMPUTER
M010	ENGINE MANAGEMENT ECU
M015	PLUG PREHEATING CONTROL UNIT
N040	FUEL PUMP AND LEVEL GAUGE
N070	INJECTOR
N077	FUEL PRESSURE REGULATOR	-
N087	FUEL PRESSURE REGULATOR ON RAIL

COMPONENT LOCATION - DIESEL ENGINES ELECTRONIC MANAGEMENT - Fiat GRANDE PUNTO 1.3 Multijet

DIESEL ENGINE ELECTRONIC MANAGEMENT COMPONENT LOCATION Fiat GRANDE PUNTO 1.3 Multijet

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Component code	Description	Reference to the operation
A040	HEATER PLUGS
B001	JUNCTION UNIT
B099	MAXI FUSE BOX ON BATTERY
C001	BATTERY EARTH	-
C010	LEFT FRONT EARTH	-
C015	DASHBOARD EARTH, DRIVER'S SIDE	-
D020	DASHBOARD/REAR COUPLING	-
D029	ENGINE CABLES/ENGINE SERVICES CABLE COUPLING	-
D107	DASHBOARD-REAR/ENGINE SERVICES COUPLING	-
E050	INSTRUMENT PANEL
I020	REVERSING LIGHTS SWITCH
I030	BRAKE PEDAL SWITCH
I031	CLUTCH PEDAL SWITCH
I050	INERTIA SWITCH
K030	LOW ENGINE OIL PRESSURE SENSOR (SWITCH)
K036	ENGINE COOLANT TEMPERATURE SENSOR/SENDER UNIT
K040	LAMBDA SENSOR
K041	AIR FLOW METER
K046	RPM SENSOR
K047	TIMING SENSOR
K055	ACCELERATOR PEDAL POTENTIOMETER
K082	SUPERCHARGING SENSOR
K083	FUEL PRESSURE SENSOR
K101	FUEL TEMPERATURE AND WATER IN FUEL FILTER SENSOR
L030	EGR SOLENOID VALVE
L036	TURBINE VARIABLE GEOMETRY CONTROL SOLENOID VALVE
M001	BODY COMPUTER
M010	ENGINE MANAGEMENT ECU
M015	PLUG PREHEATING CONTROL UNIT
N040	FUEL PUMP AND LEVEL GAUGE
N070	INJECTOR
N077	FUEL PRESSURE REGULATOR	-
N087	FUEL PRESSURE REGULATOR ON RAIL

DESCRIPTION - DIESEL ENGINES ELECTRONIC MANAGEMENT - Fiat GRANDE PUNTO 1.3 Multijet

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.Diesel engines are equipped with a COMMON RAIL type injection system.This features the use of an electronically controlled high injection pressure. The supply of fuel, known as the pilot injection, is optimized by the electronic control unit by means of the injector rather than managed by the pump.In this 4 valve per cylinder version, the common rail injection system uses Multijet technology: i.e. during each engine stroke, it carries out more than the two injections normally used: it performs two pre-injections (before the piston is at top dead centre), one main and two post-injections.This solution improves fuel consumption, noise levels and performance because it allows better control of temperature in the combustion chamber by lowering the maximum value and extending the optimum combustion area.Depending on the signals received from numerous sensors, the control unit controls the injectors connected to it managing the following systems:- fuel supply;- air supply;- heater plugs;- accelerator pedal;- engine cooling;- fuel pre-heating;- emission control (lambda sensor).To respect the latest emission control regulation (EURO 4), the most recent electronic on-board management version is used that comprises new components (injectors, pressure regulator and high pressure pump, digital debimeter) and the adoption of a lambda sensor.For more details,The system is also controlled by dedicated relays in the engine bay control unit. Lines supplying the control unit and various system components (sensors and actuators) are protected by dedicated fuses that are also located inside the engine bay.

FUNCTIONAL DESCRIPTION - DIESEL ENGINES ELECTRONIC MANAGEMENT - Fiat GRANDE PUNTO 1.3 Multijet

Engine management control unit M10 controls and governs the entire electronic ignition and injection system.The ignition-operated power supply arrives via a line protected by fuse F20 of the engine compartment junction unit B1 at pin 23 of connector A of M10 .The ignition-operated power supply arrives via a line protected by fuse F43 of the engine compartment junction unit B1 at pin 50 of connector A of M10 .Pins 1, 2 and 3 of connector A of M10 are earthed.Main injection relay T9 of B1 controls the entire system: this is protected by a line protected by fuse F43 of engine compartment control unit B1 and is excited by a control signal (earth) from pin 80 of connector A of control unit M10 and thus sends a power supply:- to pin 5 of connector A of the control unit, via the line of fuse F29 of B1 ;- to pins 4 and 6 of connector A of the actual control unit, via the line protected by fuse F28 of B1;- to lambda sensor K40 and debimeter K41 through the line from fuse F27 of B1.Fuel pump relay T8 of B1 is supplied by the line protected by fuse F30 of B1. This is energized by a command signal (earth) from pin 85 of connector A of control unit M10 and supplies power to fuel pump N40 , which is earthed via inertia switch I50 , that cuts off the circuit in the case of impact and thus prevents dangerous flows of fuel.Control unit M15 that manages the preheating of the heater plugs A40 is supplied directly - connector A - from the battery via a line protected by MAXIFUSE F7 of B99.This is supplied - connector B - from the line of fuse F59 of B1 and exchanges command and control signals with pins 70 and 74 of connector A of M10, which controls the timing. Connector C is connected to spark plugs A40.The engine management control unit M10 receives signals from the various sensors thereby keeping all the engine operating parameters under control.Rpm sensor K46 supplies, via a frequency signal exchanged with pins 43 and 59 of connector B of control unit M10 , information on engine speed.Timing sensor K47 is supplied from pin 21 of connector B of M10 . It receives a reference earath from pin 56 of connector B of control unit M10 and on the way to this, a frequency signal corresponding to the phase at pin 25 of connector B.Engine temperature sensor K36 receives a reference earth from pin 29 of connector B of control unit M10 , and sends a signal proportional to engine coolant temperature to pin 54 of connector B .The air flow meter K41 - supplied by fuse F27 of junction unit B1 - receives a reference earth from pin 27 of connector B of M10 and sends pin 14 of connector B a signal proportional to the air flow rate.An air temperature sensor inside K41 also sends an air temperature signal to pin 10 of connector B of M10 .The accelerator pedal K55 has two built in potentiometers (one main one and one safety one).The former receives power and earth signals from pins 65 and 83 of connector A of M10 and sends a corresponding signal to pin 35.The latter receives power and earth signals from pins 15 and 32 of connector A of M10 and sends a signal to pin 41.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 61 of connector A of M10 and sends a fuel temperature signal to pin 13.The supercharging sensor K82 measures the pressure and the temperature in the intake chamber, downstream of the turbocharger. It is supplied by pin 24 of connector B of M10 and receives a reference earth from pin 23 of connector B. A signal corresponding to the pressure level is sent to pin 41 of connector B of the control unit, the signal corresponding to the temperature is sent to pin 37 of connector B.Fuel pressure sensor K83 supplies the injection control unit with a feedback signal to modulate injection pressure and duration.It receives power and a reference earth from pins 38 and 6 of connector B of M10 ; it then sends a pressure signal to pin 8.Lambda sensor K40 sends signals to pins 44, 46 and 47 of connector A of M10 while pin 45 supplies a reference earth. Sensor K40 is heated by a coil to ensure efficient operation even when cold. The coil is supplied by the line of fuse 27 of B1 and receives an earth signal from pin 12 of connector A of control unit M10.The fuel pressure regulator on the pump N77 controls the high pressure produced by the actual pump; the two control signals come from pins 4 and 34 of connector B of control unit M10.The fuel pressure regulator on the rail N78 is responsible for keeping the value of the fuel pressure in the actual rail constant; the two control signals arrive from pins 19 and 20 of connector B of control unit M10.The EGR solenoid L30 controls exhaust gas recirculation. It is supplied by a line from fuse F59 of B1 , and is controlled by a signal from pin 15 of connector B of M10 .The turbine variable geometry solenoid valve L36 regulates the operation of the turbine depending on the engine load: it is supplied by the line for fuse F59 of B1 and is controlled by a signal from pin 30 of connector A of M10.The engine management control unit sends the command to the injectors N70 from pins 16-47, 17-49, 31-48, 1-46 of connector B of M10 for cylinders 1, 2, 3 and 4, respectively.Pin 81 of connector A of M10 receives a signal from brake light switch I30 - NO contact - provided with an ignition-controlled power supply from fuse F22 of Body Computer M1. It receives via the CAN a signal - NC contact - from brake light switch I30 supplied with an ignition controlled supply from fuse F26 of Body Computer M1.Pin 22 of connector A of M10 receives the signal coming from the clutch switch I31.Pin 94 of connector A of M10 receives the signal coming from the clutch switch I20.The control unit M10 receives - at pin 9 of connector B - a signal from the minimum engine oil pressure sensor K30The water in diesel filter sensor built into filter K101 receives an ignition-operated supply from fuse F59 of control unit B1 and sends a corresponding signal to pin 90 of connector A of M10.The control unit M10 is then connected via the CAN - pin 40-64 of connector A of M10 - to the Body Computer M1 and to the other network nodes: it sends information through this connection on: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- system self-diagnosis, which may be used by connecting to connector R10;- 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;- heater plugs pre-heating, which is sent to instrument panel E50 that controls the warning light;- water in the diesel filter, which is sent to instrument panel E50 that controls the display;It receives a speedometer signal via the CAN network that is generated by the ABS control unit M50.The autodiagnostic system for the control unit M10 also produces a signal - which leaves pin 78 of connector A - which is connected directly to the EOBD warning light in the instrument panel E50.