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WIRING-DIAGRAMS

Fiat MULTIPLA 1.9 JTD 8V da 09/03 – DIESEL ENGINES ELECTRONIC MANAGEMENT – – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

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Fiat MULTIPLA 1.9 JTD 8V da 09/03 – DIESEL ENGINES ELECTRONIC MANAGEMENT – – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION
Wiring diagram
DIESEL ENGINES ELECTRONIC MANAGEMENT - Wiring diagram Fiat MULTIPLA 1.9 JTD 8V da 09/03Unlock Lifetime Access for This Car.


DIESEL ENGINES ELECTRONIC MANAGEMENT - Wiring diagram Fiat MULTIPLA 1.9 JTD 8V da 09/03Unlock Lifetime Access for This Car.

Components
Component codeNameAssembly reference
A1BatteryA30Ignition coilA40Heater plugsB1Junction unitB5MAXI FUSE boxB25Ignition-operated services supply fuse 1554-
B25Ignition-operated services supply fuse 1554-
B35Injection memory and CODE fuse-
B37Fuse (MAXI FUSE) spark plug and diesel preheating-
B37Fuse (MAXI FUSE) spark plug and diesel preheating-
B39Diesel pre-heating fuse-
B40Fuel injection services supply fuse-
B41Fuel injection control unit supply relay-
C11Front earth right-
C11Front earth right-
C31Rear right earth-
C60Earth on engine-
C60Earth on engine-
D1Front/facia junction-
D4Front/engine junction-
D4Front/engine junction-
D81Injector junction-
E50Instrument panelH1Ignition switchI030Brake pedal switch ( FRONT )I031Clutch pedal switch ( FRONT )I50Inertia switchI50Inertia switchJ010Fuel injection main relay ( ENGINE )-
J15Fuel pump relay-
J17Diesel preheating relay-
K36Engine coolant temperature sensor/sender unit2891259Op. 1056B multi-point injection system (mpi)
K36Engine coolant temperature sensor/sender unitK041Air flow meter ( ENGINE )K45Engine coolant temperature sensorK45Engine coolant temperature sensorK46RPM sensorK46RPM sensorK46RPM sensorK47Timing sensorK47Timing sensorK055Accelerator pedal potentiometer ( FRONT )K81Fuel temperature sensorK82Turbocharging sensorK83Fuel pressure sensorL30EGR solenoidL36Variable geometry turbine solenoid valve-
L62Butterfly casing solenoid valve-
M10Engine management ECU2891259Op. 1056B multi-point injection system (mpi)
M10Engine management ECU2891409Op. 1060G pressure pump electric control
M10Engine management ECU2891259Op. 1056B multi-point injection system (mpi)
M10Engine management ECUM15Plug preheating control unit-
N40Fuel pump and sender unitN70InjectorN74Idle actuatorN77Fuel pressure regulatorO20Diesel heater resistanceR10Multiple tester connection-
Location of components
DIESEL ENGINES ELECTRONIC MANAGEMENT - Location of components Fiat MULTIPLA 1.9 JTD 8V da 09/03Unlock Lifetime Access for This Car.

Components
Component codeNameAssembly reference
A1BatteryA30Ignition coilA40Heater plugsB1Junction unitB5MAXI FUSE boxB25Ignition-operated services supply fuse 1554-
B25Ignition-operated services supply fuse 1554-
B35Injection memory and CODE fuse-
B37Fuse (MAXI FUSE) spark plug and diesel preheating-
B37Fuse (MAXI FUSE) spark plug and diesel preheating-
B39Diesel pre-heating fuse-
B40Fuel injection services supply fuse-
B41Fuel injection control unit supply relay-
C11Front earth right-
C11Front earth right-
C31Rear right earth-
C60Earth on engine-
C60Earth on engine-
D1Front/facia junction-
D4Front/engine junction-
D4Front/engine junction-
D81Injector junction-
E50Instrument panelH1Ignition switchI030Brake pedal switch ( FRONT )I031Clutch pedal switch ( FRONT )I50Inertia switchI50Inertia switchJ010Fuel injection main relay ( ENGINE )-
J15Fuel pump relay-
J17Diesel preheating relay-
K36Engine coolant temperature sensor/sender unit2891259Op. 1056B multi-point injection system (mpi)
K36Engine coolant temperature sensor/sender unitK041Air flow meter ( ENGINE )K45Engine coolant temperature sensorK45Engine coolant temperature sensorK46RPM sensorK46RPM sensorK46RPM sensorK47Timing sensorK47Timing sensorK055Accelerator pedal potentiometer ( FRONT )K81Fuel temperature sensorK82Turbocharging sensorK83Fuel pressure sensorL30EGR solenoidL36Variable geometry turbine solenoid valve-
L62Butterfly casing solenoid valve-
M10Engine management ECU2891259Op. 1056B multi-point injection system (mpi)
M10Engine management ECU2891409Op. 1060G pressure pump electric control
M10Engine management ECU2891259Op. 1056B multi-point injection system (mpi)
M10Engine management ECUM15Plug preheating control unit-
N40Fuel pump and sender unitN70InjectorN74Idle actuatorN77Fuel pressure regulatorO20Diesel heater resistanceR10Multiple tester connection-
DescriptionAn electronic management system supervises and governs all engine parameters. It optimises performance and fuel consumption by responding in real time to different service conditions.The Diesel engine is fitted with a COMMON RAIL UNIJET injection system.This uses high, electronically-controlled injection pressure. Fuel delivery, termed a pilot injection, is optimised by the electronic control unit via the injector and not managed by the pump.The system uses signals received from numerous sensors to control actuators. It is connected to the following systems:fuel supply system;air supply system;heater plugs;accelerator pedal;engine cooling;fuel preheating. For more details, 2888240see DESCRIPTION AND OPERATION:1060DIESEL FUEL INJECTIONThe system is also controlled by means of special relays located in the engine compartment in the relay and fuse box.The supply lines for the control unit and the various system components (sensors and actuators) are protected by a special maxifuse and other fuses, also located in the above mentioned box.The pre-heating system is protected by a special maxifuse located next to the box in question.
Functional description The engine control unit M10 monitors and controls the UNIJET electronic injection system. The engine control unit M10 receives a supply controlled by the ignition (15/54) to pin 13 of connector B from the line protected by fuse B25. The relay J10 controls the supply of the system: it is supplied by the battery, the line for maxifuse UGD of B5, the coil is supplied by the same line and is energized by an earth signal coming from the control unit M10, from pin 46 of connector C. This energizing makes it possible to supply pins 7, 8 and 1 of the control unit. (the line which goes from J10 to pin 1 is also protected by fuse B41). The relay J15 is also supplied by the battery, from the line for maxifuse UGD of B5: signals arrive, from pins 30 and 52 of connector C for the control unit M10, which energize the relay J15, which provides the supply for the electric fuel pump N40 which is earthed through the inertia switch I50. In case of impact, this cuts off the circuit to prevent the danger of fuel delivery. The diesel pre-heating relay J17, supplied by the battery - connector A - through the line protected by fuses B37 and B39, is energized by the signal coming from the alternator ("recharging" warning light signal): the pre-heating only operates when the engine is running. Under these circumstances, the relay controls the operation of the diesel heating resistance O20: the thermal contact (connector A of O20) deactivates the system when the heating is over. The control unit M15, which manages the pre-heating of the heater plugs A40, is supplied - connector A - directly by the battery through the line protected by fuse B37. It receives commands from pins 38 and 51 of connector C of M10 which controls the timing and sends a feedback signal o pin 1 of connector B of the control unit. Connector B is connected to the heater plugs A40. Pins 4 and 5 of connector A of M10 are earthed. The control unit M10 receives signals from the various sensors in order to monitor all engine service conditions. Rpm sensor K46 supplies information on engine speed via a frequency signal sent to pin 26 of connector D of control unit M10. It receives an earth signal from pin 37 of control unit connector D. Both signals are weak and are therefore suitably shielded by pin 17. Timing sensor K47 is supplied from pin 12 of connector D of control unit M10. It receives a reference earth from pin 2 of connector D of control unit M10 and sends it a signal of frequency corresponding to the timing of pin 3 of the same connector. Engine temperature sender unit K45 eceives a reference earth from pin 27 of connector D of control unit M10 and supplies a signal proportional to coolant temperature to pin 36 of the same connector. Air flow meter K41 receives a general power supply from pin 11 of control unit connector D and a reference voltage from control unit pin 1. It sends pin 14 of connector D a signal proportional to air flow. K41 also contains an air temperature sensor: the sensor reference earth is supplied by pin 4 of connector D of M10, while an air temperature signal is received by pin 23 of connector A. Accelerator pedal K55 is fitted with two built-in potentiometers (a main one and a safety back-up). The first receives power and earth from pins 5 and 23 respectively of connector C of M10 and sends a corresponding signal to pin 10 of the same connector. The second receives power and earth from pins 21 and 8 respectively of connector C of M10 and sends a corresponding signal to pin 9 of connector C. Fuel temperature sensor K81 fitted on the return manifold measures the temperature of diesel leaving the injectors. It receives a reference earth from pin 1 of connector C of M10 and sends a fuel temperature signal to control unit pin 24. The supercharging sensor K82 measures the turbocharger pressure. It is supplied from pin 8 of conector D of M10 and receives a reference earth from control unt pin 7. The signal is sent to pin 6 of control unit connector D. Fuel pressure sensor K83 is responsible for providing the injection control unit with a feedback signal for governing pressure and injection duration. It receives power and a reference earth from pins 13 and 14 respectively of connector D of M10. It then sends a pressure signal to pin 24 of the same connector. Fuel pressure regulator N77 maintains fuel pressure level constant in the accumulator. Both control signals are produced by pins 31 and 21 of control unit connector D. EGR solenoid L30 controls exhaust gas recirculation. It is supplied from pin 37 of connector C of M10 and sends a signal to control unit pin 50. Pin 8 of connector B of M10 receives the signal coming from the brake lights switch I30, with the supply controlled by the ignition (INT) from fuse F1 of the junction unit B1 ( See E2021 BRAKE LIGHTS ). Pin 2 of connector C of M10 receives a signal from the second contact of clutch pedal switch I31, ignition-operated (INT/A) through a line protected by fuse F1 in junction unit B1. The injectors N70 receive the opening go ahead supply from pins 2 (cylinders 1 and 4) and 4 (cylinders 2 and 3) for connector E of M10.The engine control unit sends commands to the injectors from pins 9, 7, 5 and 3 of connector E for cylinders 1, 2, 3 and 4, respectively. The control unit is equipped with a self-diagnostic unit that may be used by connecting the unit to connector R10 via pin 28 of connector C. The autod-diagnostic system also produces a signal for the "injection failure" warning light: the instrument panel E50 receives a supply controlled by the ignition (INT) from the line protected by fuse F1 in the junction unit B1: when the earth signal arrives from pin 48 of connector C, the "injection failure" warning light comes on.An earth signal to pin 43 of connector C, on the other hand, lights up the "heater plugs" warning light. If the engine temperature is high, the control unit lights up the warning light in the instrument panel E50 (signal from pin 49 of connector C). The control unit M10 is connected with the CODE control unit M20 through the special line from pin 13 of connector C; in this way, if the CODE control unit does not detect the correct code, it does not give the go ahead and the engine cannot be started up. The speedometer signal (vehicle speed) reaches pin 26 of connector C of the control unit M10 ( See E4021 SPEEDOMETER ). Control unit M10 is connected to the air conditioning system via pin 32 of connector D and pin 3 of connector B. This allows engine idling speed to be adjusted to increased engine load whenever the compressor is activated, or to turn off the compressor in the case of high speeds or high engine loads ( 2889470SeeE6021COMPRESSOR ENGAGEMENT ). The control unit also controls the engine cooling system: pin 23 of connector B, pin 15 of connector D and 20, 45 of connector C control activation of the relevant fan ( 2889349SeeE5020ENGINE COOLING ).

Battery



A001A



A001A



A001B



A001B



A001C



A001D



A001D



A001E



A001F



A001F



A001G



A001G



A001G



A001G



Battery



A001A



A001A



A001B



A001B



A001C



A001D



A001D



A001E



A001F



A001F



A001G



A001G



A001G



A001G



Battery



A001A



A001A



A001B



A001B



A001C



A001D



A001D



A001E



A001F



A001F



A001G



A001G



A001G



A001G



Battery



A001A



A001A



A001B



A001B



A001C



A001D



A001D



A001E



A001F



A001F



A001G



A001G



A001G



A001G



Battery



A001A



A001A



A001B



A001B



A001C



A001D



A001D



A001E



A001F



A001F



A001G



A001G



A001G



A001G



Ignition-operated services supply fuse 1554



B025



B025



B025



B025



B025



B025



B025



B025



B025



B025



B025



Injection memory and CODE fuse



B035



B035



B035



B035



B035



Fuse (MAXI FUSE) spark plug and diesel preheating



B037



Diesel pre-heating fuse



B039



B039



B039



B039



Fuel injection services supply fuse



B040



B040



B040



Fuel injection control unit supply relay



B041



B041



Front earth right



C011



C011



C011



C011



C011



C011



C011



C011



C011



C011



Rear right earth



C031



C031



C031



C031



Earth on engine



C060



C060



C060



C060



C060



C060



C060



C060



Front/facia junction



D001A



D001A



D001A



D001A



D001A



D001A



D001A



D001A



D001A



D001A



D001A



D001A



D001B



D001B



D001B



D001B



D001B



D001B



D001B



D001B



D001B



D001B



D001B



D001C



D001A



D001A



D001A



D001A



D001A



D001A



D001A



D001A



D001C



D001C



D001C



D001C



D001C



D001C



D001C



D001C



D001A



D001C



D001C



Front/engine junction



D004A



D004A



D004B



D004B



D004



D004



D004



D004



D004A



D004A



D004B



D004B



D004B



D004B



D004B



D004



D004



D004



D004



D004B



D004B



D004B



D004B



D004B



D004B



D004B



D004B



D004B



Injector junction



D081A



D081A



D081B



D081B



D081



D081



D081



Instrument panel



E050A



E050A



E050A



E050A



E050A



E050B



E050B



E050B



E050B



E050B



E050B



E050B



E050C



E050C



E050A



E050B



E050C



E050C



E050A



E050C



Instrument panel



E050A



E050A



E050A



E050A



E050A



E050B



E050B



E050B



E050B



E050B



E050B



E050B



E050C



E050C



E050A



E050B



E050C



E050C



E050A



E050C



Instrument panel



E050A



E050A



E050A



E050A



E050A



E050B



E050B



E050B



E050B



E050B



E050B



E050B



E050C



E050C



E050A



E050B



E050C



E050C



E050A



E050C



Instrument panel



E050A



E050A



E050A



E050A



E050A



E050B



E050B



E050B



E050B



E050B



E050B



E050B



E050C



E050C



E050A



E050B



E050C



E050C



E050A



E050C



Instrument panel



E050A



E050A



E050A



E050A



E050A



E050B



E050B



E050B



E050B



E050B



E050B



E050B



E050C



E050C



E050A



E050B



E050C



E050C



E050A



E050C



Instrument panel



E050A



E050A



E050A



E050A



E050A



E050B



E050B



E050B



E050B



E050B



E050B



E050B



E050C



E050C



E050A



E050B



E050C



E050C



E050A



E050C



Fuel pump relay



J015



J015



Diesel preheating relay



J017



J017



Diesel preheating relay



J017



J017



Diesel preheating relay



J017



J017



Diesel preheating relay



J017



J017



Diesel preheating relay



J017



J017



Diesel preheating relay



J017



J017



Diesel preheating relay



J017



J017



Diesel preheating relay



J017



J017



Diesel preheating relay



J017



J017



Diesel preheating relay



J017



J017



Diesel preheating relay



J017



J017



Diesel preheating relay



J017



J017



Butterfly casing solenoid valve



L062



Butterfly casing solenoid valve



L062



Butterfly casing solenoid valve



L062



Fuel pump and sender unit



N040



N040



N040



N040



Fuel pump and sender unit



N040



N040



N040



N040



Fuel pump and sender unit



N040



N040



N040



N040



Fuel pump and sender unit



N040



N040



N040



N040



Fuel pump and sender unit



N040



N040



N040



N040



Fuel pump and sender unit



N040



N040



N040



N040


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