2000 FIAT MAREA oil press

Technical Data
Engine: lubrication
OO.io
Marea- Marea Weekend
2000 range ©
LUBRICATION - DESCRIPTION LUBRICATION - DESCRIPTION Values in mm
Engine lubrication circuit forced circulation, via geared pump
with cartridge oil filter in series
Oil pump: type gears
Pump operated through auxiliary shaft
Oil pressure relief valve incorporated in the oil pump
Full flow filter cartridge
Low oil pressure transmitter electrical
IlimBi between the edge of the gears
^^^•••F and the pump casing
JjOj^^^U between the upper edge of the
^^*^^B§ gears and the pump cover
Clearance between the bearing and the driven gear
Clearance between the drive gear shaft and the
housing in the pump casing
Oi p between drive gear
* * and driven gear
0 © J±
Operating pressure at a temperature of 100°C
when idling > 1 bar
at 4000 rpm > 4.5 bar
Pi 9.0-9.8 daN
31
9 1 Hi I H? P2 6.92-7.21 daN
H2 21
24 Print n° 506.763/23

Marea-Marea Weekend
2000 range ©
Technical Data
Engine: lubrication
OO.io
LUBRICATION - DESCRIPTION Values in mm
Engine lubrication circuit forced circulation, via geared pump
with cartridge oil filter in series
Oil pump: type geared located in the
crankshaft front cover
Pump operated by chain driven by crankshaft
Oil pressure relief valve incorported in crankshaft front cover
Full flow filter cartridge
Low oil pressure transmitter electrical
llOmH between the edge of the gears
^^^•••F and the pump casing
(EQi^^^U between upper edge of
^^^^BBf gears and pump cover
Oi 0 between drive gear
-*r-H- and driven gear
© © J:
Operating pressure at a temperature of 100°C
when idling 1 bar
at 4000 rpm > 4 bar
11.73-12.51
2 J*
Hi
Oil pressure relief valve spring
35
Copyright by Fiat Auto 25

Marea-Marea Weekend Technical Data
2000 range (j§) Engine: fuel system - special tools
OO.io
INTEGRATED ELECTRONIC INJECTION/IGNITION SYSTEM
COMPONENTS
Electronic control unit
Manual gearbox I.A.W. 4EF. B3
Electronic control unit
Automatic transmission I.A.W. 4EF. L1
Air pressure sensor M. Marelli TPRT 05
Fuel vapour solenoid valve M. Marelli EC2
Throttle case M. Marelli 46 SX F2
Idle adjustment actuator M. Marelli IB 02
Injector M. Marelli IWP 109
Fuel pressure regulator MARWALL RPM 84
Coolant temperature sender unit SYLEA 402.386.01
Top Dead Centre and rpm sensor M. Marelli CVM 02
Throttle position sensor (potentiometer) M. Marelli IPF 2C
Detonation sensor NGK KNE 11
Electric fuel pump (*) MARWALL ESS 291
Lambda sensor upstream of catalyzer NTK OZA 534 A1
Lambda sensor downstream of catalyzer NTK OZA 532 A1
Fuel filter MARWALL FA 5325 IN
Timing sensor SYLEA SFA 200
Ignition coil Champion BAE 920A/
BERU 0.040.100.029
SPECIAL TOOLS
(*) Use tool 1870736000 for removing-refitting the fuel pump retaining ring nut
Copyright by Fiat Auto 27

Marea- Marea Weekend Technical Data
2000 range (§) Engine: supercharging
OO.io
SUPERCHARGING Turbocharger operated by exhaust gases with waste-gate pressure valve and air/air
heat exchanger (intercooler)
COOLING
Turbocharger: type Garret GT 17 variable geometry
Maximum supercharging pressure 1 bar
6
5
1. Compressor inlet
2. Oil inlet
3. Turbine outlet
4. Oil outlet
5. Turbine inlet
6. Oil inlet
7. Oil outlet
8. Compressor outlet
Copyright by Fiat Auto 31

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

Marea- Marea Weekend 9"°
2000 range ©
Engine
Fuel feed system
10.
TIMING SENSOR
The Hall effect sensor is fitted to the cylinder head and faces the camshaft pulley.
An opening on the pulley allows the timing sensor to detect the engine timing position and indicate it to
the injection control unit.
The injection control unit uses the timing sensor signal to detect TDC at the end of compression.
Operation
A semi-condulator layer, through which a current passes, immersed in a magnetic field (lines of force per­
pendicular to the direction of the current), produces a difference in power, known as Hall voltage.
If the intensity of the current remains constant, the voltage produced only depends on the intensity of the
magnetic field. The intensity of the field can simply be altered periodically to produce a modulated electri­
cal signal. Signal frequency is proportional to the speed with which the magnetic field changes.
To achieve this change, the sensor is crossed by a metal ring (inner part of the pulley) with an opening.
When it moves, the metal part of the ring covers the sensor to magnetic field and the output signal is
therefore low; Conversely, the sensor generates a high signal at the opening when the magnetic field is
present.
This signal, together with the rpm and TDC signals, allows the injection control unit to identify piston po­
sition and determine injection point.
AIR FLOW METER
(DEBIMETER)
The debimeter is located on the air intake
sleeve and is hot film type.
The debimeter contains an intake air tem­
perature sensor.
Operation
The principle of operation is based on a
heated membrane fitted into a measurement
channel through which engine intake air
flows.
The hot film membrane is maintained at a
constant temperature (about 120 °C higher
than incoming air) by the heater coil.
The mass of air flowing through the measure­
ment channel tends to take heat from the
membrane. To keep the membrane at constant
temperature, a certain current level must flow
through the resistance.
Because this current is proportional to the
mass of air that flows to the engine, it can be
measured with a Wheatstone bridge and the
resulting signal is sent to the injection control
unit.
1. Covers
2. Electronic card
3. Sensor
4. Mounting plate
5. Mount
6. o-ring
7. Temperature sensor
Copyright by Fiat Auto 13

Engine
Fuel feed system
10.
1. Pressure rod
2. Pin
3. Nozzle
4. Coil
5. Pilot valve
6. Ball plunger
7. Control area
8. Supply volume
9. Control volume
10. Fuel outlet connector (low pressure)
11. Control port
12. Supply port
13. Electrical connection
14. Fuel input connector (high pressure)
15. Spring
Marea- Marea Weekend 9 ™
2000 range (Q)
INJECTORS
The injectors are fitted to the cylinder head
and are electromagnetic in type. They are
controlled directly by the injection control
unit.
The injectors come with a high-pressure sup­
ply port and a recirculation pipe at environ­
mental pressure; The supply port is connected
to a delivery manifold (rail) with pipes de­
signed to withstand the high service pressures.
The injector can be divided into two parts:
- Actuator/spray made up of a pressure rod
(1), pin (2) and nozzle (3);
- control solenoid made up of coil (4) and
pilot valve (5).
Operation
Injector operation may be divided into three
stages:
1. rest position
Coil (4) is deactivated and plunger (6) is in
closed position to prevent fuel entering the
cylinder: Fc > Fa where Fc is the force gener­
ated by pressure acting on the control area (7)
of pressure rod (1) and Fa is the force due to
the pressure acting on supply volume (8).
2. Start of injection
Coil (4) is excited and causes plunger (6) to
rise. Fuel flows from control volume (9) to
the return manfold to bring about a pressure
drop in control area (7). Simultanteously, line
pressure through supply port (12) exerceses a
force Fa > Fc on supply volume (8) to cause
pin (2) to rise and thus allow fuel into the
cylinders.
3. end of injection
Coil (4) is deactivated and causes plunger (6)
to return to closed position. The resulting bal­
ance of forces makes pin (2) return to rest po­
sition and injection therefore ends.
14 Publication no. 506.763/24

Engine
Fuel feed system
JTD Marea-Marea Weekend ©
2000 range ©
10.
iH
ft
B I 0 ] I D
[ 0 0 1 1
D
0 1 GLOW PLUG PREHEATING CONTROL
UNIT
The glow plugs are controlled by means of a
preheating control unit under the direct con­
trol of the injection control unit.
The preheating control unit contains a smart
relay that sends a return response (feedback)
to the injection control unit, which is thus in­
formed of faults in the preheating control unit
or glow plug short-circuits to earth.
The figure shows the connectors on the base
of the preheating control unit and the pin-out
1. Earth
2. Injection control unit (pin 22)
3. Power supply from main injection relay
4. Not connected
5. Injection control unit (pin 62)
8. Positive from battery (+30)
G. Glow plugs (only four outputs are used)
ACCELERATOR
PEDAL POTENTIOMETER
Accelerator pedal position is converted to an
electrical voltage signal and send to the injec­
tion control unit by a potentiometer connected
to the accelerator pedal.
Accelerator pedal position is processed to­
gether with rpm information to provide injec­
tion times and pressure.
The sensor consists of a case (1) secured to
the pedal by a flange, which contains an axi-
ally-positioned shaft (2) connected to two
potentiometers (3): main and safety potenti­
ometers.
A coil spring on the shaft ensures the correct
resistance to pressure while a second spring
ensures return upon release.
16 Publication no. 506.763/24