2001 FIAT MAREA Rear

Marea- Marea Weekend & Engine
2000 range (§) Fuel feed system
ENGINE MANAGEMENT SYSTEM
Foreword
The Marea-Marea Weekend 1998 20v is equipped with a 5 cylinder in line engine with 20 valves, 1998
cc, twin overhead camshaft and a Bosch ME3.1 integrated electronic injection/ignition system.
The fuel system differs from the one described for the 1998 20v "99 range" version through the addition
of several variants to make it compatible with the EEC Stage 3 EOBD regulations.
The main modifications to the system can be summarized as follows:
- Catalytic converter near the exhaust manifold to take maximum advantage of the heat of the gases.
- Two Lambda sensors, one upstream (front) and one downstream (rear) which check the quality of the
exhaust gases and the operation of the catalyzer.
- Adoption of an accelerometre sensor on the right shock absorber turret, used to distinguish between
engine torque variations doe to the uneveness of the road surface and those due to failed ignition in
the combustion chamber (misfire).
- Adoption of a timing sensor on the inlet side timing pulley.
- Multi-purpose valve on the tank to prevent leaks.
- Adoption of raipd attachment connectors for the anti-evaporation system pipes.
- Cap on the fuel filler with an attachment cable.
For further information on the fuel system, refer to publication 507137.
DIAGRAM SHOWING ENGINE EXHAUST ASSEMBLY
4F001WJ01
Key
1. Exhaust manifold
2. Catalytic converter
3. Front Lambda sensor
4. Rear Lambda sensor
5. Silencers
Copyright by Fiat Auto 1

Engine
Fuel feed system
Marea-Marea Weekend ®> *»
2000 range @)
10.
LOCATION OF INJECTION/IGNITION SYSTEM COMPONENTS
Key
1. Variable valve timing control solenoid
2. Injectors
3. Fuel vapour cut-out solenoid valve
4. Injection/ignition control unit
5. General system protective fuse
6. Flow meter/air temperature sensor
7. Motorized throttle body
8. Engine coolant temperature sensor
9. Vehicle speed sensor
10. Variable geometry manifold actuator solenoid
valve
11. RPM sensor
12. Front Lambda sensor connector
13. Ignition coil
14. Timing sensor
15. Rear Lambda sensor connector
16. Detonation sensors
17. Accelerometer
LOCATION OF DIAGNOSTIC SOCKET
The diagnostic socket for the analysis of the en­
gine management system is located under the
junction unit in the dashboard. This socket also
makes a connection with the diagnostic equip­
ment (Examiner or other instruments) for the
other electronic control units on the vehicle.
It is a "standardized" 16-way diagnostic socket
which can be connected to the diagnostic equip­
ment using the "MPX97" adaptor.
2 Print n° 506.763/23

Engine
Fuel feed system
Marea- Marea Weekend 9
2000 range ©
- Release the electrical wiring for the front
Lambda sensor from the retaining bands
and remove the sensor.
Refitting
NOTE Apply special grease (e.g. Bosch VS
14016- FT) to the threaded part ot
the sensor
- Place the Lambda sensor in position and
tighten to torque.
E Lambda sensor : 4.5 daNm
Reverse the order of the operations de­
scribed for the removal.
REMOVING-REFITTING REAR LAMBDA
SENSOR
Removing
- Position the vehicle on a lift.
- Disconnect the negative battery terminal.
1. Disconnect the electrical connector (1a)
and release the electrical wiring from the
retaining bands.
- Raise the lift.
2. Undo the lower fixing bolts (1a) and the
side fixing bolts (1b) and remove the
shield (1c) under the engine.
3. Use tool USAG 875 (1a), shown in the
diagram or a similar tool to undo the rear
Lambda sensor.
Refitting
NOTE Apply special grease (e.g. Bosch VS
14016- FT) to the threaded part of
the sensor.
- Place the Lambda sensor in position and
tighten to torque.
E Lambda sensor: 4.5 daNm
Reverse the order of the operations carried
out for the removal.
4 Print n° 506.763/23

Marea- Marea Weekend 9
2000 range ©
Engine
Fuel feed system
10.
REMOVING-REFITTING CATALYTIC
CONVERTER
Removing
- Position the vehicle on a lift.
- Disconnect the negative battery terminal.
- Remove: the upper and lower heat shields,
the front and rear Lambda sensors, carrying
out the operations described in the relevant
chapters.
- Lower the lift.
1. Undo the fixing nuts (1a) and separate the
catalytic converter (1b) from the exhaust
manifold (1c).
E
Nuts la: 3.2 daNm
- Raise the lift.
2. Undo the fixing nuts (1a) and separate the
exhaust pipe (1 b).
EI
Nuts 1a: 4.2 daNm
3. Undo the nuts (1a) and the bolts (1b) and
remove the bracket (1c).
E
E
Nuts 1a: 2.5 daNm
Bolts 1b: 2.5 daNm
- Remove the catalytic converter.
Refitting
- Reverse the order of the operations carried
out for the removal.
Copyright by Fiat Auto 7

Ma tea- Marea Weekend 9 m
2000 range ©)
Engine
Fuel feed system
10.
1. Undo the fixing nuts (1) and remove the
vacuum reservoir.
SOLENOID VALVE CONTROLLING
SUPERCHARGING PRESSURE
Removing-refitting
- Position the vehicle on a lift, then discon­
nect the negative battery lead.
2. Working from underneath the vehicle, dis­
connect the electrical connector (1) and
the pipes (2).
3. Press the retaining tab on the rear of the
mounting bracket and release the solenoid
valve.
FUEL FILTER
Removing-refitting
4. Disconnect the electrical connections (1)
from the fuel filter and the supply and re­
turn pipes to the tank and the supply pipes
to the pump (2), then undo the nuts (3)
fixing the fuel filter mounting. Lift up the
filter and disconnect the electrical connec­
tion (4) for the water in the diesel sensor.
Copyright by Fiat Auto oi upjdin 35

Electrical equipment
Junction unit
Marea-Marea Weekend
2000 range ©
55.
Junction unit
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Front view of control unit
and location of fuses
The connectors cannot
be connected incor­
rectly as each has its
own unique shape. The
letters identifying the
connectors are the same
as those used in the
wiring diagrams .
NOTE connectors A, C and D: are connected to the front lead.
connectors B,F, I, J and H are connected to the facia lead
connectors E and G are connected to the rear lead
Rear view of control unit
and location of relays.
E1. Switch discharge relay for
starting (30A)
E2. Horn relay (20A)
E3. Heated rear windscreen relay
(30A)
4 Print n° 506.763/23

Marea-Marea Weekend
2000 range Q
DESCRIPTION OF WIRING AND CONNECTORS
CONNECTOR A
N.
No.
Wiring
colour Circuit involved
1 R Supply (+30) from fuse box
2 BR Supply (+30) from fuse box
CONNECTOR c
N. No.
Wiring colour Circuit involved
1 RN Car interior fan power supply (with
air conditioner), air conditioner
control unit
2 MB Fuel pump control, inertia switch
3 AN Car interior fan power supply (only heater), air conditioner control unit
4 H Right dipped beam headlamp
5 HN Left dipped beam, headllamp en­
ablement
6 VN Left main beam
7 V Right main beam
CONNECTOR E
N.
No.
Wiring colour Circuit involved
1 RN Right brake light
2 GR Rear view mirror control light
3 RG Left brake light
4 MN Rear window power supply
5 MB Fuel pump, inertia switch
6 -N.C.
7 AN Left rear turn signal
8 -N.C.
9 GR Right rear side light (without check
panel)
10 HL Left number plate light (without
check panel)
11 -N.C.
12 RG N.C.
13 RN N.C.
14 R Supplementary brake light
Electrical system
Junction unit
55.
CONNECTOR B
N. No.
Wiring
colour Circuit involved
1 R Power supply to electric windows, door lock, service control unit, main beam relay, fog lamp, sun-roof, heated seats, cigar lighter
CONNECTOR D
N.
No.
Wiring colour Circuit involved
1 G Left headlamp alignment
2 G Right headlamp alignment
3 G Headlamp alignment control
4 AN Front and left side turn signal
5 AR Alarm control unit power supply
6 HB Right headlamp alignment power
supply
7 H Left headlamp alignment power
supply
8 H Headlamp alignment control
9 B Reversing light control
10 Z Horns.
11 Z Horns.
12 -N.C.
13 GV Right front side light
14 AR Brake light power supply
15 A Front and right side turn signal
16 GL Left front side light
17S -N.C.
18 RN Brake light control
CONNECTOR F
N.
No.
Wiring colour Circuit involved
1 HR Dipped beam control
2 -N.C.
3 LR Main beam control
4 -N.C.
5 G Side light power supply from ignition
Copyright by Fiat Auto 5

Electrical system
Junction unit
Marea- Marea Weekend
2000 range ©
55. 55.
DESCRIPTION OF WIRING AND CONNECTORS (cont)
CONNECTOR G
N.
No.
Wiring
colour Circuit involved
1 HB Right number plate light (without check panel)
2 -N.C.
3 AR Rear view mirror power supply
4 -N.C.
5 A Right rear turn signal
6 BN Left reversing light (only Marea)
7 B Right reversing light
8 GN Left rear side light (without check panel)
9 RG Rear courtesy light power supply (left for Marea Weekend)
10 RN Remote control receiver power sup­ply
11 RN Front courtesy light power supply
12 RN Right rear courtesy light power sup­ply (Marea Weekend)
CONNECTOR 1
N. No. Wiring
colour Circuit involved
1 AN Hazard warning light power supply
2 CB + 15 power supply from ignition
3 -N.C.
4 CB Stalk unit power supply
5 C Power supply, windscreen wiper
6 N Earth
7 LN Horn signal
8 AG + 15 power supply from ignition (start-up excluded)
9 AB Hazard warning light power supply
10 AB Hazard warning lights and instru­ment panel power supply (from January 2001)
11 AB Hazard warning light power supply
12 AR Turn signal power supply
13 R Instrument panel power supply
14 -N.C.
CONNECTOR H
N.
No.
Wiring
colour Circuit involved
1 AN Right turn signal warning light
2 C Power supply, door lock, radio
3 AN Right turn signal control
4 RN Right brake light (versions with Check Panel)
5 A Left turn signal control
6 A Left turn signal control
7 A Left turn signal warning light
8 AN Right turn signal control
9 RV Brake light control (versions with
Check Panel)
10 MN Mirror demister control
CONNECTOR J
N.
No.
Wiring colour Circuit involved
1 RG Left brake light (versions with check
panel)
2 AG Alarm and instrument panel power
supply (to December 2000)
3 GN Side light warning light, switch panel lighting, automatic transmis­sion control lighting
4 BC Rear window control
5 R Power supply, radio
6 LB Main beam warning light
7 RV Radio phone power supply
8 -N.C.
9 R Radio power supply
10 GN Radio lighting
11 GN Instrument lighting dimmer
12 GN Cigar lighter lighting
6 Publication no. 506. 763/24