Engine - Fiat 1998 Marea Service Manual

Marea- Marea Weekend
99 update
HITACHI INTEGRATED
TION/IGNITION SYSTEM
Introduction
Functional diagram of HITACHI
injection/ignition system
Diagram showing information enter-
ing/leaving HITACHI
tion/ignition system control unit and
sensors/actuators
Location of HITACHI
tion/ignition system components in
engine compartment
S Y S T E M
MANAGEMENT STRATEGIES
Management of the signals
Management of the injection
- . Management of the FIAT-CODE
anti-theft function
Management of the ignition
Management of the engine idle
control
Management of the charcoal filter
scavenging
Management of
manifold
Management of the climate control
system
Management of the radiator fans
DIAGNOSTICS
ELECTRICAL/ELECTRONIC CIRCUIT
HITACHI system wiring diagram
System relays
HITACHI system control unit pin-
out
HITACHI system control unit pin-
out
Engine rpm sensor
Engine timing sensor
Air flow meter
Lambda probe
Butterfly position sensor
Coolant temperature sensor
Vehicle speed sensor
Detonation sensor
Ignition coil
DIAGRAM SHOWING AIR INTAKE
CIRCUIT
Copyright Fiat Auto
ft
page ,
INJEC-
1
1
2
injec-
3
injec-
4
5
5
6
10
11
14
14
the modular
14
15
16
18
19
20
21
22
23
24
25
26
27
.28
29
30
30
31
32
INTAKE CIRCUIT
- Throttle body
Engine idle speed adjustment ac-
tuator
DIAGRAM SHOWING FUEL CIR-
CUIT
FUEL SUPPLY CIRCUIT
Fuel drip tray assembly
Fuel manifold
Injectors
Inertia safety switch
EMISSION CONTROL DEVICES
Catalytic silencer
Fuel anti-evaporation system
Exhaust gas recirculation system
(blow-by)
CHECKS, ADJUSTMENTS
REPAIR OPERATIONS
HITACHI MPI SYSTEM
Checking concentration of emis-
siosn
Engine idle speed check
Ignition advance check
Checks on fuel supply circuit
Fuel manifold and injectors
- Throttle body
- Accelerator cable adjustment

Engine

Index
10.
page
33
33
34
' 35
35
36
38
39
40
41
41
42
44
AND
ON THE
45
45
46
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47
52
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54