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Fiat MULTIPLA 1.6 16v fino a 05/99 — PETROL ENGINE ELECTRONIC MANAGEMENT — — BIPOWER — WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION — WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

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Fiat MULTIPLA 1.6 16v fino a 05/99 — PETROL ENGINE ELECTRONIC MANAGEMENT — — BIPOWER — WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION — WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION
Wiring diagram
PETROL ENGINE ELECTRONIC MANAGEMENT - Wiring diagram Fiat MULTIPLA 1.6 16v fino a 05/99Unlock Lifetime Access for This Car.


PETROL ENGINE ELECTRONIC MANAGEMENT - Wiring diagram Fiat MULTIPLA 1.6 16v fino a 05/99Unlock Lifetime Access for This Car.


PETROL ENGINE ELECTRONIC MANAGEMENT - Wiring diagram Fiat MULTIPLA 1.6 16v fino a 05/99Unlock Lifetime Access for This Car.

Components
Component codeNameAssembly reference
A30Ignition coilB1Junction unitB5MAXI FUSE boxB25Ignition-operated services supply fuse 1554-
B25Ignition-operated services supply fuse 1554-
B28Petrol pump fuse-
B29Injector fuse-
B34GPL injector fuse-
B35Injection memory and CODE fuse-
B36Lambda sensor fuse-
B36Lambda sensor fuse-
B40Fuel injection services supply fuse-
C10Left front earth-
C10Left front earth-
C31Rear right earth-
C60Earth on engine-
C62Methane injection control unit earth-
C63GPL injection control unit earth-
D1Front/facia junction-
D4Front/engine junction-
D4Front/engine junction-
D6Front/rear junction-
D81Injector junction-
E50Instrument panelH1Ignition switchH94Petrol GPL switchH94Petrol GPL switchH95Petrol/methane selectorH95Petrol/methane selectorI50Inertia switchI50Inertia switchJ010Fuel injection main relay ( ENGINE )-
J24GPL solenoid valve relay-
J25Methane solenoid relay-
J26Methane/LPG relay feed-
J26Methane/LPG relay feed-
J27Petrol cut out relay-
K15Lambda sensor on pre-catalyzer-
K17Lambda sensor on catalyzer-
K36Engine coolant temperature sensor/sender unit2891259Op. 1056B multi-point injection system (mpi)
K36Engine coolant temperature sensor/sender unitK40Lambda sensorK43Integrated air temperature sensorK45Engine coolant temperature sensorK45Engine coolant temperature sensorK46RPM sensorK46RPM sensorK47Timing sensor-
K47Timing sensor2891259Op. 1056B multi-point injection system (mpi)
K47Timing sensor-
K47Timing sensorK50Detonation sensorK50Detonation sensorK56Throttle position sensorK57Methane pressure and temperature sensor-
L10Fuel vapour recovery solenoidL60Methane supply solenoidL61Methane regulation solenoidL63GPL cut out solenoid valveM10Engine management ECUM10Engine management ECU-
M10Engine management ECUM10Engine management ECUM16Electr device petrol/methane selector-
M16Electr device petrol/methane selector-
M17Availability. of electric pump and GPL supply. solenoid valve.2891489Op. 1043A gpl tank
M17Availability. of electric pump and GPL supply. solenoid valve.M18GPL control unitM19Methane injection control unit-
N40Fuel pump and sender unitN70InjectorN72Methane injectorN73GPL injectorN74Idle actuatorR10Multiple tester connection-
Location of components
PETROL ENGINE ELECTRONIC MANAGEMENT - Location of components Fiat MULTIPLA 1.6 16v fino a 05/99Unlock Lifetime Access for This Car.

Components
Component codeNameAssembly reference
A30Ignition coilB1Junction unitB5MAXI FUSE boxB25Ignition-operated services supply fuse 1554-
B25Ignition-operated services supply fuse 1554-
B28Petrol pump fuse-
B29Injector fuse-
B34GPL injector fuse-
B35Injection memory and CODE fuse-
B36Lambda sensor fuse-
B36Lambda sensor fuse-
B40Fuel injection services supply fuse-
C10Left front earth-
C10Left front earth-
C31Rear right earth-
C60Earth on engine-
C62Methane injection control unit earth-
C63GPL injection control unit earth-
D1Front/facia junction-
D4Front/engine junction-
D4Front/engine junction-
D6Front/rear junction-
D81Injector junction-
E50Instrument panelH1Ignition switchH94Petrol GPL switchH94Petrol GPL switchH95Petrol/methane selectorH95Petrol/methane selectorI50Inertia switchI50Inertia switchJ010Fuel injection main relay ( ENGINE )-
J24GPL solenoid valve relay-
J25Methane solenoid relay-
J26Methane/LPG relay feed-
J26Methane/LPG relay feed-
J27Petrol cut out relay-
K15Lambda sensor on pre-catalyzer-
K17Lambda sensor on catalyzer-
K36Engine coolant temperature sensor/sender unit2891259Op. 1056B multi-point injection system (mpi)
K36Engine coolant temperature sensor/sender unitK40Lambda sensorK43Integrated air temperature sensorK45Engine coolant temperature sensorK45Engine coolant temperature sensorK46RPM sensorK46RPM sensorK47Timing sensor-
K47Timing sensor2891259Op. 1056B multi-point injection system (mpi)
K47Timing sensor-
K47Timing sensorK50Detonation sensorK50Detonation sensorK56Throttle position sensorK57Methane pressure and temperature sensor-
L10Fuel vapour recovery solenoidL60Methane supply solenoidL61Methane regulation solenoidL63GPL cut out solenoid valveM10Engine management ECUM10Engine management ECU-
M10Engine management ECUM10Engine management ECUM16Electr device petrol/methane selector-
M16Electr device petrol/methane selector-
M17Availability. of electric pump and GPL supply. solenoid valve.2891489Op. 1043A gpl tank
M17Availability. of electric pump and GPL supply. solenoid valve.M18GPL control unitM19Methane injection control unit-
N40Fuel pump and sender unitN70InjectorN72Methane injectorN73GPL injectorN74Idle actuatorR10Multiple 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 system is managed by a single control unit which controls both the petrol and methane injection.In effect, it also manages the complex logic for automatically switching from methane to petrol in addition to the manual engagement of running on petrol via the button in the dashboard.The system uses signals received from numerous sensors to control actuators. It is connected to the following systems:petrol supply;methane supply;air supply:engine cooling;exhaust with catalytic converter;fuel vapour recirculation. For more details, 2888249see DESCRIPTION AND OPERATION:1058CNG FUEL SYSTEMThe system is also controlled by means of three relays located in the fuse and relay box in the engine compartment near the actual control unit. The supply lines for the control unit and the various system components (sensors and actuators) are protected by a special maxifuse and five other fuses also located in the above mentioned box.
Functional description The engine control unit M10 monitors and controls the entire electronic ignition and injection system. The control unit is supplied directly by the battery - at pin 29 - by the line for the maxifuse EFI of B5 , through the line protected by fuse B35 . The supply controlled by the ignition (15/54) reaches pin 47 from the line protected by fuse B25 . Pins 27 and 28 of the control unit M10 are earthed.The main relay J10 is supplied directly by the battery from the line for the maxifuse EFI of B5.whilst the coil supply is controlled by the ignition (15/54) from the line protected by fuse B25; it is energized by an (earth) signal coming from pin 15 of the control unit M10 (safety signal which enables the system, petrol/methane) and, as a result, sends the supply:to the methane system relay feed J25 ;to the petrol system relay feed J26 , via the line protected by fuse B36 ;to the switching device for the injectors M16 to the Lambda sensor heater K40 , via the line protected by fuse B36 ;to the vapour recovery solenoid valve L10 through the line protected by fuse B36 ;to the coil A30 ; The switching button H95 receives a supply controlled by the ignition (INT) from the line for fuse F8 of the junction unit B1 , in the case of manualy switching to petrol it sends a signal to pin 11 of the control unit M10 and the green LED on the actual button also comes on. According to the control logic, pins 16 and 31 of control unit M10 enable either the petrol or methane fuel system, excluding the other system. When running on petrol, pin 16 sends an earth signal which energizes the petrol operation relay J26 : The latter is supplied by the line for maxifuse EFI of B5 , via the line protected by the specific fuse B28 and the coil supplied by the line controlled by the control unit safety logic, via relay J10 ; when it is energized, it sends the supply to the electric fuel pump N40 ; The electric fuel pump N40 is earthed through the inertia switch I50 which, in the case of an impact, cuts off the circuit and stops the dangerous supply of fuel. The same signal is sent to the instrument E50 - pin 10 of connector B - and lights up the special warning light which signals running on petrol Pin 31 - methane operation - sends an earth signal which energizes the methane operation relay J25 ; the latter is supplied by the line for maxifuse EFI of B5 and the coil supplied by the line controlled by the control unit safety logic, via relay J10 ; when it is energized it sends the supply to the methane adjustment solenoid valve L61 and to the three methane canister L60 solenoid valves; The solenoid valves located on the methane canisters L60 are earthed via the inertia switch I50 which, in the case of an impact, interrupts the circuit and prevents dangerous leaks of fuel. (for more details on the methane system safety devices, 2888249see DESCRIPTION AND OPERATION:1058CNG FUEL SYSTEM ). The engine control unit M10 receives signals from the various sensors in order to monitor all engine service conditions. The sensor K46 , through a frequency signal sent to pins 53 (positive) and 67 (negative) for the control unit M10 , provides information concerning the engine speed: the intensity of these two signals is extremely low and therefore they are appropriately shielded (pin 77). The timing sensor K47 receives a reference supply from pin 68 and a reference earth from pin 54 of M10 and provides information concerning the engine timing through a signal sent to pin 69 of control unit M10 . The integrated air temperature sensor K43 receives a reference earth from pin 54; it sends a signal corresponding to the temperature of the intake air to pin 55 of the control unit. From pin 68 of M10 a reference supply is sent to the sensor K43 which restores a signal, at pin 75, proportional to the pressure of the intake air. The butterfly position sensor K56 receives a 5 V supply from pin 60 and receives a reference earth from pin 54; it sends a signal, through a potentiometer, which is proportional to the opening of the butterfly, to pin 76 of M10. The engine temperature sensor K45 , receives a reference earth from pin 54 of the control unit M10 and supplies a signal proportional to the temperature of the engine coolant to pin 62 of the control unit. The detonation sensor K50 provides information concerning the onset of detonation in the combustion chamber through frequency signals: it sends two signals to pins 56 (positive) and 70 (negative ) of M10 ; these signals are also suitably shielded (pin 63). The heated Lambda sensor K40 provides the control unit M10 with information concerning the correct composition of the air/fuel mixture: the signal is sent to pin 20 of the control unit, whilst pin 9 provides the reference earth: the intensity of these two signals is extremely low and therefore they are appropriately shielded (pin 44). The sensor K40 is heated by a resistance to ensure correct operation, even when cold; the resistance is supplied by the main relay J10 through the line protected by fuse B36 .The control unit M10 controls the opening of the injectors via special signals sent from pins 71, 78 and 79. The switching between the petrol injectors N70 and the methane injectors N72 is managed by the actual control unit with the assistance of a specific electronic device M16 . It consists of a multiple relay supplied, at pin 3, by the line for maxifuse EFI of B5, via the line protected by the specific fuse B29 and, with the coils supplied, at pin 14, by the line controlled by the control unit safety logic, via relay J10; the coils are energized by two specific signals for control unit M10:petrol operation is controlled by pin 42 of M10 to pin 13 of M16 : this closes the contacts and pins 7, 8, 12 and 15 which supply the petrol injectors N70 methane operation is controlled by pin 5 of M10 to pin 1 of M16 : this closes the contacts and pins 2, 9 , 10 and 11 which supply the methane injectors N72 . The control unit M10 also controls the coil A30 through the signals for the coil primary winding, whilst the secondary winding sends the impulse to the spark plugs: from pin 59 for the pair of cylinders 1 & 4 and from pin 66 for cylinders 2 & 3. The coil A30 primary windings receive a signal to enable opening from main relay J10 . The idle actuator N74 regulates the butterfly by-pass line. It is controlled by the control unit M10 through the signals from pins 57, 58, 64 and 65. Fuel vapour recovery solenoid L10 allows fuel vapours to pass through to the engine intake where they join the mixture entering the combustion chamber. The valve L10 , supplied by the main relay J10 , is opened by the control unit when the engine is loaded by a signal from pin 52 of M10 . The control unit M10 is connected with the CODE control unit M20 through the special serial line from pin 13; this way, if the CODE control unit does not detect a correct code, it does not give the go ahead and the engine is not started up. ( 2889511SeeE7010CODE ). The control unit is equipped with an auto-diagnostic system which can be used by connecting the unit to the connector R10 : it receives signals from pin 25 from the control unit M10 through the special diagnostic line. The auto-diagnostic system also produces the signal for the "injection failure" warning light in the instrument E50 , which comes from pin 26 of the control unit M10 . If the engine temperature is high, the control unit causes the relevant warning light in the instrument panel E50 to come on (signal from pin 17 of M10 ). The speedometer signal (vehicle speed) reaches pin 50 of the control unit M10 ( 2889248SeeE4010INSTRUMENT PANEL ). The control unit M10 is connected with the air conditioning system through pins 41 and 48. This makes it possible to adjust the engine idle speed as the load increases each time the compressor is switched on or to switch off the compressor in the case of high engine speed or load conditions ( 2889470SeeE6021COMPRESSOR ENGAGEMENT ). The control unit also controls the engine cooling system: pins 14, 35 and 40 control the engagement of the relevant fan ( 2889349SeeE5020ENGINE COOLING ).

Ignition coil



A030



A030



A030



Ignition coil



A030



A030



A030



Ignition coil



A030



A030



A030



Ignition-operated services supply fuse 1554



B025



B025



B025



B025



B025



B025



B025



B025



B025



B025



B025



Petrol pump fuse



B028



B028



B028



Injector fuse



B029



B029A



B029B



B029A



B029B



GPL injector fuse



B034B



B034A



Injection memory and CODE fuse



B035



B035



B035



B035



B035



Lambda sensor fuse



B036



B036



B036



B036



Fuel injection services supply fuse



B040



B040



B040



Left front earth



C010A



C010B



C010C



C010C



C010D



C010D



C010A



C010A



C010A



C010A



C010A



C010A



C010A



C010A



Rear right earth



C031



C031



C031



C031



Earth on engine



C060



C060



C060



C060



C060



C060



C060



C060



Methane injection control unit earth



C062



GPL injection control unit earth



C063



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



Front/rear junction



D006



D006



D006



D006



D006



D006



D006



D006



D006



D006



D006



D006



D006



D006



D006



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



GPL solenoid valve relay



J024



Methane solenoid relay



J025



J025



Methane/LPG relay feed



J026



J026



J026



Petrol cut out relay



J027



J027



Lambda sensor on pre-catalyzer



K015



K015



K015



Lambda sensor on catalyzer



K017



Lambda sensor on catalyzer



K017



Lambda sensor on catalyzer



K017



Lambda sensor on catalyzer



K017



Lambda sensor on catalyzer



K017



Lambda sensor on catalyzer



K017



Timing sensor



K047



K047



K047



K047



K047



Timing sensor



K047



K047



K047



K047



K047



Timing sensor



K047



K047



K047



K047



K047



Timing sensor



K047



K047



K047



K047



K047



Fuel vapour recovery solenoid



L010



L010



Fuel vapour recovery solenoid



L010



L010



Fuel vapour recovery solenoid



L010



L010



Fuel vapour recovery solenoid



L010



L010



Fuel vapour recovery solenoid



L010



L010



Electr device petrol/methane selector



M016



Electr device petrol/methane selector



M016



Electr device petrol/methane selector



M016



Electr device petrol/methane selector



M016



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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