2000 FIAT MAREA engine

Engine
Fuel feed system
Marea- Marea Weekend
2000 range @
10.
FUEL ANTI-EVAPORATION SYSTEM
The fuel anti-evaporation system has several improvements, compared with previous versions, aimed at
sealing the fuel vapours on the outside.
In particular, the following measures have been adopted:
- multi-purpose valve on the tank to prevent leaks.
- New anti-evaporation solenoid valve and the adoption of rapid attachment connectors for the anti-
evaporation system pipes.
- Plug on the fuel filler with attachment cable.
For further information on the fuel system, refer to publication: 507137.
Key
1. Filler
2. Multi-purpose valve
3. Active charcoal filter
4. Anti-evaporation solenoid
valve
5. Fuel vapour intake on inlet
manifold
6. Fuel tank
7. Engine management elec­
tronic control unit
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 the connection with the diagnostic equip­
ment (Examiner or other instruments) for the
other electronic control units on the vehicle.
In effect, it is a "standardized" 16-way diagnostic
socket which can be connected to the diagnostic
equipment using the "MPX97" adaptor.
2 Print n° 506.763/23

Marea- Marea Weekend 9* Engine
2000 range (Q) Fuel feed system
10.
LOCATION OF INJECTION/IGNITION SYSTEM COMPONENTS IN THE ENGINE COMPART­
MENT
1 2345678 9
Key
1. Active charcoal filter
2. Anti-evaporation solenoid valve
3. Intake air pressure and temperature sensor
4. Engine idle adjustment stepping motor on
throttle casing
5. Throttle valve position sensor on throttle cas­
ing
6. System relay feed
7. Protective fuse
8. Throttle case
9. Maxi-fuse protecting I.E. system (EFI)
10. Speedometer sensor
11. Engine management control unit
12. Coolant temperature sensor
13. Ignition coil
14. Injectors
15. Rpm and TDC sensor
16. Timing sensor
17. Spark plugs
Copyright by Fiat Auto 3

Engine
Fuel feed system
Marea- Marea Weekend •
2000 range @
FRONT LAMBDA SENSOR
Removing
- Disconnect the negative battery terminal.
1. Disconect the electrical conection (1a), re­
lease the wiring from the retaining band
(2) and disconnect the Lambda sensor (3).
Refitting
- Position the sensor and tighten it to torque
avoiding forcing the component which
would damage it irreparably.
Apply special grease (e.g. Bosch 5
964080112) to the threaded part of the
sensor.
REAR LAMBDA SENSOR
Removing
- Position the vehicle on a lift.
- Disconnect the negative battery terminal.
2. Disconnect the electrical connection (1)
and release the wiring from the retaining
bands.
3. Raise the vehicle and disconnect the
Lambda sensor.
Refitting
- Position the sensor and tighten it to torque
avoiding force on the component which
would damage it irreparably.
Apply special grease (e.g. Bosch 5
964080112) to the threaded part of the
sensor.
- Connect the connector and renew the
Lambda senor cable fastenings.
4 Print n° 506.763/23

Marea-Marea Weekend
2000 range ©
Engine
Fuel feed system
10.
CATALYTIC CONVERTER HEAT SHIELD
Removing-refitting
- Position the vehicle on a lift and disconnect
the negative battery terminal.
1. Raise the vehicle and undo the bolts (1)
fixing the heat shield for the driveshaft
boot, then detach the heat shield (2); undo
the other lower bolt for the catalyzer heat
shield.
- Lower the vehicle and detach the front
Lambda sensor as described in the relvant
paragraph.
2. Loosen the bands shown and detach the
air hose from the filter to the throttle cas­
ing, complete with resonator.
3. Undo the upper bolts fixing the heat shield
and detach it.
CATALYTIC CONVERTER
Removing-refitting
- Position the vehicle on a lift and disconnect
the negative battery terminal.
- Disconnect the front Lambda senor as de­
scribed in the relevant paragraph.
- Detach the catalytic converter heat shield
as described in the relevant paragraph.
4. Undo the nuts fixing the catalytic converter
to the exhaust manifold.
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Engine
Fuel feed system
16v Marea- Marea Weekend ©
2000 range @
1. Loosen the band securing the catalyzer
acting on the bolt (1) and undo the bolts
(2) fixing the band to the bracket.
2. Disconnect the connector for the rear
Lambda sensor and release the cable from
the retaining bands along the routing.
3. Raise the vehicle, undo the bolts fixing the
catalytic converter to the rear exhaust pipe
and detach the converter, complete with
rear Lambda sensor.
EXHAUST MANIFOLD
Removing-Refitting
- Position the vehicle on a lift, disconnect
the negative battery terminal and discon­
nect the following components, as de­
scribed in the relevant paragraphs.
- Front Lambda sensor
- Catalytic converter heat shield
- Catalytic converter.
4. Remove the protective cover for the power
assisted steering pump drive belt.
6 Print n° 506.763/23

Marea- Marea Weekend •
2000 range ©
16v Engine
Fuel feed system
10.
1. Loosen the belt tension using the lock nut
(2) and the adjustment screw (1); then re­
lease the belt from the pulley.
2. Undo the bolts fixing the bracket for the
power assisted steering pump mounting
and detach the pump.
3. Undo the nuts fixing the exhaust manifold
to the cylinder head and detach the mani­
fold.
- To refit, reverse the order of the operations
carried out for the removal; tension the
power assisted steering pump drive belt,
using the adjustment screw; use tool
189576200 to check that the tension is
between 32 and 45 daN.
ELECTRIC FUEL PUMP WITH LEVEL
SENDER UNIT
Removing-refitting
- Disconnect the negative battery terminal.
- Lift up the lining in the luggage compart­
ment and remove the fuel pup protective
cover.
- Disconnect the electrical connection for the
electric pump assembly and the fuel supply
and breather pipes.
4. Undo the ring nut fixing the electric fuel
pump to the tank using tool 1870736000.
The gasket on the tank housing should be
replaced each time the pump drip tray is
removed-refitted.
NOTE The position of the fuel pump is fixed
and is established by a reference in
the housing in the tank which sou Id
correspond to the projection on the
pump drip tray.
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Marea- MareaWeekend • ** Engine
2000 range @ . . Index
10.
. Page
FUEL FEED SYSTEM
- Engine management system 1
- Location of injection/ignition system
components 2
- Location of diagnostic socket 2
- Removing-refitting accelorometer 3
- Removing-refitting front Lambda sensor 3
- Removing-refitting rear Lambda sensor 4
- Removing-refitting heat shield 5
- Removing-refitting catalytic converter 7
Copyright by Fiat Auto

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