Marea-Marea Weekend®™®™
99 range
Engine
Index
10.
page
FUEL SYSTEM
1
Introduction 1
System management strategies 1
Fuel system functional diagram 2
INJECTION SYSTEM WIRING DIA-
GRAM
6
Injection electronic control unit 8
Diagram showing information en-
tering/leaving the control unit and
sensors/actuators 10
Rpm sensor 11
Timing sensor 12
Air flow meter 12
Injectors 13
Engine coolant temperature sensor 14
Fuel temperature sensor 14
Fuel pressure sensor 14
Heater plugs control unit 15
Accelerator pedal potentiometer 15
Brake pedal switch 16
Clutch pedal switch 16
Excess pressure sensor 16
Atmospheric pressure sensor 16
FUEL SUPPLY CIRCUIT
17
Immersed (auxiliary) electric fuel
pump assembly and gauge 18
- Fuel filter 18
Pressure pump 19
Fuel pressure regulator 19
Multi-purpose valve 20
Supply manifold (rail) 20
Inertia safety switch 21
AIR SUPPLY CIRCUIT
22
Turbocharger 23
Exhaust gas circuit 24
EMISSION CONTROL DEVICE
25
Catalytic converter 25
Exhaust gas recirculation circuit
(EGR) 25
EGR solenoid valve 26
Circuit for recirculating vapours
coming from the crankcase (blow-
by) 27
Copyright by Fiat Auto
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