Engine Side Wiring (A); Vehicle Side Wiring (B); Location Of System Earth Points - Fiat 1998 Marea Service Manual

Marea- Marea Weekend
99 update

engine side wiring (A)

butterfly position sensor
coolant temperature sensor
air flow meter
engine rpm sensor
engine timing sensor
vehicle speed sensor
detonation sensor
injectors
coils
idle speed stepping motor
charcoal filter solenoid valve
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ELECTRICAL/ELECTRONIC CIRCUIT
Wiring
The system has two distinct sets of wiring. The
engine side wiring (A) connects the compo-
nents fitted on the engine to the engine man-
agement control unit and the vehicle side wir-
ing (B) which conects the other components
to the control unit and acts an an interface
with the vehicle wiring.
NOTE The two connectors are the same,
4F018OJ01

vehicle side wiring (B)

electric fuel pump
twin relay
radiator fan relay
climate control compressor relay (if fitted)
fuses
Lambda sensor
diagnostic equipment
FIAT CODE control unti
instrument panel connection
supply from battery
supply from ignition switch

Location of system earth points

In order to increase electro-magnetic compati-
bility and operational reliability, special care
has been taken over the number and the loca-
tion of the earth points, as illustrated below:
main earth directly on the battery negative;
engine control system earth on the timing side
power unit mounting.
P3N19GJ02
Fuel system
therefore if the control unit is disman-
tled the fitting position (arrow) must
be followed to prevent them from be-
ing mixed up.
Engine
10.
19