Fiat 1996 Brava Service Manual page 412

Bravo-Brava @«
'98 range
16v
Engine
Fuel system
10.
M. MARELLI- WEBER I.A.W.-49F IN­
TEGRATED FUEL INJECTION-IGN­
ITION
Introduction
page page
MANAGEMENT
SYSTEM
STRATEGIES 1
Functional diagram of fuel injection-
ignition 2
- Management of fuel injection 3
- Management of ignition 9
- Management of engine starting block
function (Fiat CODE) 12
- Management of radiator fan 12
- Management of engine idle control 13
- Management of fuel vapour recirculation 13
- Management of fault diagnosis 13
- Management of climate control system 14
Diagram of input/output information
between control unit and sensors/actu­
ators of the fuel injection-ignition 15
Diagram of air intake system 16
Diagram of fuel supply system 17
Diagram of fuel evaporation control
system 18
Diagram of crankcase gas recirculation
system (blow-by) 19
Wiring diagram of fuel injection- igni­
tion 20
Diagram of exhaust assembly 22
Location of components of fuel injec­
tion-ignition 23
FUSES AND RELAYS OF FUEL INJEC­
TION-IGNITION 24
DIAGNOSTIC SOCKET 24
EARTH POINTS 24
COMPONENTS OF THE FUEL
INJECTION-IGNITION 25
- Wiring of fuel injection-ignition 25
- Fuel injection-ignition electronic con­
trol unit 25
- Engine rpm and TDC sensor 29
- Knock sensor 31
- Throttle body 32
- Throttle position sensor 33
- Coolant temperature sensor 35
Engine idle speed actuator
Intake air temperature and
sensor
Electric fuel pump
Fuel manifold
pressure
Charcoal filter and fuel vapour cut
valve
Multi-function valve
Vehicle speed sensor
Safety and ventilation valve
Fuel injectors
Inertial safety switch
Ignition coils
Lambda probe
-off
36
38
39
40
40
42
43
43
44
45
46
48
CHECKS-ADJUSTMENTS AND RE­
PAIR INTERVENTIONS ON THE FUEL
INJECTION/IGNITION 51
- Adjusting throttle cable 51
- Removing-refitting fuel manifold and
fuel injectors 51
- Removing-refitting fuel tank 53
- Removing-refitting throttle cable 56
- Checking engine idle speed 57
- Checking concentration of polluting
emissions 57
- Checks on fuel supply circuit 59
FAULT DIAGNOSIS 62
- Recognition and storage in memory of
errors 62
- Error frequency counter 62
- Error deletion 62
- Management of system fault warning
light 62
- Communication between control unit
and diagnostic equipment 63
- Parameters displayed 63
- List of errors 63
- Active diagnosis 64
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