torque FIAT MAREA 2000 1.G Workshop Manual

Technical Data
Engine
Marea-Marea Weekend
2000 range @
OO.io
SPECIFICATIONS
Cycle OTTO 4 stroke
^Q\^ Timing gear TOHC
1 Fuel system type Integrated electronic injection - ignition
L—,1 Number of cylinders
Ml • • •
4 5
Vt—•F-jZf Cylinder liner
Is—A \ mm
W (bore)
80.5 82
j^J |q| Stroke mm 78.4 75.65
fifi-9 0> °-ace" cm3
1596 1998
^|*^^ Compression
= 9 ratio
ft
10.50 ±0.15 10.5 ±0.15
kW
r _ (bhp) X Maximum
76
(103)
110
(150)
/ power CEE
/ .. ... • rpm 5750 6500
daNm
(kgm)
Maximum
14.5
(14.8)
18.1
(18.5)
, torque CEE
... \ > rpm 4000 3750
10 Print n° 506.763/23

Marea-Marea Weekend
2000 range ©
Technical Data
Engine
SPECIFICATIONS
OO.io
JTD
Cycle
Timing gear
Fuel system type
Diesel 4 stroke
single overhead camshaft
Direct injection
Turbocharger + intercooler
Number of cylinders 4 in line
r
0 Cylinder liner
(bore) mm 82
Stroke mm 90.4
Displacement cm 1910
Compression
ratio 18.45 ± 0.5
kW
(bhp)
Max power CEE
rpm
daNm
(kgm)
Max torque CEE
rpm
81
(110)
4000
20
(20.4)
1500
Copyright by Fiat Auto 29

Marea- Marea Weekend
2000 range (§)
Technical Data
Automatic transmission - differential
GEARBOX
AUTOMATIC AISIIM
ENGINE TYPE
00.21-27
Speeds .1. ooooq
ooooo
.1,
OOOOO
ooooo
Gear ratios OOOOO
oooo©
2.807
1.479
1.000
0.735
2.769
Idler ratio 1.019 (54/53)
Torque converter 0 mm 216
T X Drive torque ratio 2.150
Quantity of
oil
Total, with gearbox con­
verter, radiator and pipes
empty
GI/2 Replacement only
6 litres (5.4 kg)
4.3 litres (3.9 kg)
DIFFERENTIAL
Ratio crown wheel
and pinion
reduction
Final drive ratio
3.505 (82/23)
3.633 (54/53x82/23)
OOOOO
OOOOO
OOOOO
Ratio at the wheels OOOOO
OOOO©
10.198
5.373
3.633
2.670
10.060
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Marea- Marea Weekend Technical Data
2000 range (§) Electrical equipment: starting
00.55
STARTER MOTOR l^p| 20v I^P) JTD
Make Bosch
DW -12V -1,1 kW
Bosch
0 74.5-1.1/12
Bosch
0 78.5-2 KW/12
Voltage V 12
Nominal power kW 1.1 1.1 2
Rotation, pinion side clockwise
No. of poles 6 4 6
Winding windings in series permanent magnets
Engagement free wheel
Operation solenoid
End float of armature shaft mm 0.1-0.5 0.1-0.5 0.1-0.5
Data for bench test
Operating test (*):
current A
speed rpm
voltage V
torque developed daNm
-
360-380
1150
8.15
1.30
500
1950
7.30
1.30
Engagement test (*):
current A
voltage V
torque developed daNm
-680-700
4.9
3.11
1200
5.5
3.0
Idle test (*):
current A
voltage V
speed rpm
-
60-80
4.9
4040
70-80
11.5
5450-5750
Relay [ pull in Q -0.33-0.37 0.4
Winding
resistance (*) 1 hold in Q -1.13-1.27 1.7
Lubrication
Internal splines and
shaft bushes
VS+ SAE 10W
Enagement sleeve and intermediate
disc TUTELA MR3
(*) Data obtained at an ambient temperature of 20°C.
NOTE When overhauling it is not necessary to undercut the insulator between the commutator bars
Copyright by Fiat Auto 47

Technical data
Engine
JTD 100 CV Marea Weekend {_
2000 range ©
OO.io
SPECIFICATIONS
ICETTili JTD 100 cv
Cycle
Timing
Type of fuel system
Diesel 4 stroke
single overhead camshaft
Direct injection
Turbocharger + intercooler
9.
No. of cylinders 4 in line
Cylinder liner
(bore) mm 82
Stroke mm 90.4
&8
Capacity cm 1910
Compression
ratio 18.45 ± 0.5
Max power CEE
Max torque CEE
kW
(bhp)
rpm
daNm
(kgm)
rpm
74
(100)
4000
20
(20.4)
1500
2 Print n° 506.763/25

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 & 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
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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 © ™ Engine
2000 range Q Fuel feed system
10.
FUEL SYSTEM
INTRODUCTION
Marea and Marea Weekend 1.9 JTD cars are equipped with a 4 cylinder in line, 1910 cc turbodiesel en­
gine with two valves per cylinder, an overhead camshaft, turbocharger and intercooler and electronic in­
jection.
The fuel system ensures correct engine operation and can be divided into the following subsystems:
- Fuel feed circuit with common rail injection;
- air feed circuit;
- exhaust circuit;
- blow by vapour recirculation circuit;
- Exhaust Gas Recirculation (EGR) circuit
Operation of the various circuits making up the fuel system is optimised by an electronic control system
managed by a special control unit.
The main feature of the fuel system is common rail fuel injection. Common rail is a higher pressure elec­
tronic injection system for fast direct injection diesel engines.
The main features of the common rail system are as follows:
- availability of high injection pressures (up to 1350 bars);
- possibility of modulating these pressures (from a minimum of 150 bars to a maximum of 1350 bars)
independently of engine speed (rpm) and engine load;
- ability to operate at high engine speeds (up to 6000 rpm);
- precise injection control (injection advance and duration);
- reduced fuel consumption;
- reduced emissions.
FUEL SYSTEM MANAGEMENT STRATEGIES
The management program (software) is stored inside the control unit memory and consists of a series of
strategies, each of which manages a precise system control function.
Through the use of information providd by the various sensors (input), each strategy processes a set of
parameters based on data stored in special control unit memory areas. It then controls system actuators
(output), i.e. the devices that allow the engine to operate.
The main purpose of these management strategies is to determine the exact amount of fuel to be injected
into the cylinders with timing (injection advance) and pressure designed to achieve the best possible en­
gine performance in terms of power, fuel consumption, fumes, emissions and handling.
The main system management strategies are essentially as follows:
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of injected fuel quantity;
of injection advance;
of injection pressure;
of auxiliary fuel pump;
of injection during over-run (cut-off);
of idle speed;
of maximum speed limitation;
of maximum torque limitation;
of fuel temperature;
of engine coolant temperature;
of air turbocharging pressure;
of glow plugs;
of exhaust fumes;
of exhaust gas recirculation (EGR);
of climate control system activation;
control of engine immobiliser operation (Fiat
CODE);
self-diagnosis
Copyright by Fiat Auto 1

Fuel feed system
Engine Marea- Marea Weekend 9 ™
2000 range (Q)
10.
Control of idle speed
On the basis of signals from the rpm sensor and engine coolant temperature sensor, the injection control
unit controls the pressure governor and alters the injector control times to maintain idle speed stable at all
times.
Under certain conditions, the idle speed control unit also considers battery voltage.
Control of maximum speed limitation
According to rpm level, the injection control unit limits maximum speed by means of two types of inter­
vention:
- as maximum speed approaches, it reduces the amount of fuel injected to reduce line pressure;
- when maximum speed is exceeded, it inhibits operation of the auxiliary pump and injectors.
Control of maximum torque limitation
On the basis of rpm level, the injection control unit computes limit torque and maximum permitted fume
index parameters on the basis of predefined, stored maps.
It then corrects the above parameters using engine coolant temperature and car speed data. The resulting
values are then used to modulate the amount of fuel to be injected by adjusting the pressure regulator and
injectors.
Control of fuel temperature
The injection control uint is kept constantly informed of fuel temperature by a sensor on the return mani­
fold.
If fuel temperature exceeds a set value (about 110 °C), the control unit reduces line pressure by adjusting
the pressure governor, leaving injection times unaltered.
Control of coolant temperature
The injection control unit is constantly informed of coolant temperature by a sensor on the thermostat.
If engine coolant temperature or air conditioning fluid pressure exceeds certain levels, the control unit
performs the following actions:
- It reduces the amount of fuel injected by adjusting the pressure governor and injectors (power reduc­
tion);
- it controls the engine radiator cooling fan.
Control of glow plugs
The injection control unit controls operation of the glow plug preheating control unit to bring the tem­
perature in the combution chambers up to levels that promote fuel self-ignition and thus make start-up
easier.
The control unit controls the operation of the glow plug control unit for a certain time both before (pre­
heating) and after (postheating) engine start-up and also controls activation of the warning light on the
control panel.
Preheating, postheating and glow plug warning light activation times vary according to engine coolant
temperature.
4 Publication no. 506.763/24