oil temperature FIAT MAREA 2001 1.G Workshop Manual

Marea-Marea Weekend
2000 range (§)
Introduction
Product characteristics FL Group
OO.o
Name of
product
Description
International designation Application
SELENIA 20K
Synthetic SAE 10W40 multigrade engine oil.
Exceeds specifications ACEA A3-96/CCMC G5 and API
SJ
SELENIA
PERFORMER
Synthetic SAE 5W-30 multigrade engine oil. Exceeds
specifications ACEA A1 and API SJ
Temperatures below
- 20°C
SELENIA
Turbo Diesel
Synthetic SAE 10W40 multigrade engine oil
Exceeds specifications ACEA B3 and API CD
SELENIA
WR DIESEL
Synthetic SAE 5W-40 multigrade engine oil. Exceeds
specifications ACEA B3 and API CF
Temperatures below
- 15°C
TUTELA CAR
ZC 75 SYNTH
SAE 75W-80 EP oil. Satisfies standards MIL-L-2105 D
LEV and API GL 5
Manual gearboxes and
differentials
TUTELA Gl/A «ATF DEXR0N II D LEV» SAE 10W type oil for hydraulic
power assisted steering
Hydraulic power as­
sisted steering
TUTELA GI/2 « ATF DEXRON II D LEV» SAE 10W type oil for auto­
matic transmissions
Automatic
gearboxes
TUTELA MRM2 Water repellant, lithium soap based grease containing
molybdenum disulphide, consistency NLGI = 2 Constant velocity joints
TUTELA TOP 4 Synthetic fluid NHTSA n° 116 D0T4, ISO 4925, SAE
J-1703 and CUNA NC 956-01
Hydraulic brakes and
hydraulically operated
clutches
DP1 Mixture of alcohol, water and surface active agents
CUNA NC 956-11
To be used undiluted
or diluted in windscreen
washer systems
Paraflu11
Anti-freeze for cooling systems with mono-ethylene gly­
col base
CUNA NC 956-16
Cooling circuits
Percentage to be used
50% up to -35°C
Diesel Mix Additive for diesel fuel with protective action for Die­
sel engines
To be mixed with die­
sel fuel (25 cc per 10
litres)
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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

Technical Data Marea- Marea Weekend
Engine: fuel system - special tools 2000 arnge ©)
OO.io
INTEGRATED ELECTRONIC INJECTION/IGNITION SYSTEM COMPO­
NENTS
Injection/ignition system electronic control unit Bosch ME31F001
Motorized throttle body Bosch 0.250.003.052
Injector Bosch 0.280.155.770
Electric fuel pump (*) Bosch 0.580.313.011
Air flow meter Bosch 0.281.002.199
Engine coolant temperature sensor ELTH 2690350 - SYLEA
402.183.01
Lambda sensor (one upstream and one downstream of the catalyzer) Bosch LS F4
0.258.006.193
Fuel vapour solenoid valve Bosch 0.280.142.340
Detonation sensor Bosch 0.261.231.131
Hall effect injection timing sensor Bosch 0.232.101.036
Top Dead Centre and rpm sensor Bosch 0.261.210.160
Ignition coil Bosch 0.221.504.014
SPECIAL TOOLS
(*) Use tool 1870736000 for removing-refitting the fuel pump retaining ring nut
28 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
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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

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
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Engine Marea- Marea Weekend IP ™
Fuel feed system 2000 range o
10.
The EGR valve consists of:
- a Pierburg EGR solenoid (1) operated by engine management unit (2)
- a pipe from the exhaust manifold (4) (from which the exhaust gases flow)
- an air-water heat exchanger (3) (that lowers exhaust gas temperature)
- a pipe connected to throttle body (5) to which exhaust gases are admitted
4
Operation
With coolant temperature > 20°C and engine speeds between 800 and 3000 rpm, the engine management
unit controls the EGR solenoid by means of a square wave signal.
Changes in this signal allow the EGR coil to move a plunger and thus modulate the flow of exhaust gas
from the exhaust manifold to the intake manifold; this achieves two results:
- less air is taken in
- combustion temperature is lowered (due to the presence of inert gases), thus reducing the formation of
NOx (nitrogen oxides).
The engine management control unit is constantly informed of recirculation gas quantity via data from the
debimeter. If the intake of a given quantity of air (Qam) is required for a given rpm and the level sent by
the debimeter (Qar) is lower, the difference (Qgr) is the amount of gas recirculated.
Qam - Qar = Qgr
Qam = stored theoretical air quantity
Qar = actual air quantity
Qgr = recirculated gas quantity
An atmospheric pressure signal is used in controlling the EGR valve to detect when the car is being driven at
altitude. The recirculation gas quantity can then be reduced to prevent engine fumes.
28 Publication no. 506.763/24

Marea-Marea Weekend
2000 range (j§)
1
4F029XJ02
Engine
Fuel feed system
10.
RECIRCULATION CIRCUIT FOR CRANK-
CASE VAPOURS (BLOW-BY)
The control of the oil vapour emissions is
achieved through a separator (1) (function
carried out by the tappet cover) which collects
the vapours released by the crankcase in the
pipe (2).
The difference in temperature between the
separator and the oil vapours causes partial
condensation.
The vapours which have not condensed are
sent, via the pipe (3), to the turbocharger air
intake hose.
The adjustment valve, consisting of a spring
(1) and a diaphragm (2), on the tappet cover
makes it possible to prevent intake.
When the vacuum values inside the tappet
cover exceed a pre-set limit, the diaphragm
moves downwards sealing the duct from the
crankcase.
Copyright by Fiat Auto 29