2000 FIAT MAREA ECU

Technical Data
Front suspension
Marea- Marea Weekend
2000 range @
00.44
Front suspension independent, Mac Pherson type with transverse lower track control arms secured to an
auxiliary crossmember. Offset coil springs and double acting, telescopic, hydraulic shock absorbers. Anti-
roll bar connected to the telescopic damper.
CLASSIFICATION OF SPRINGS ACCORDING TO VARIOUS VERSIONS AND ENGINE TYPES
VERSIONS
ENGINE TYPES
VERSIONS
Standard E C
Standard with ABS E C
With air conditioning D B
With air conditioning, ABS and all options D B
With air conditioning and ABS D B
Standard with automatic transmission D
Standard with automatic transmission and ABS D
With air conditioning and automatic transmission C
With air conditioning, ABS and all options C
With ABS (fitted as standard) B
With ABS (fitted as standard) and air condi­
tioning A
With ABS (fitted as standard), air conditioning
and all options A
SPECIFICATIONS OF VARIOUS SPRINGS
Coil springs A B C D E
Wire diameter mm 13.6±0.05 13.5±0.05 13.2±0.05 13.2±0.05
Number of effective coils 3.75
Coil direction Clockwise
Released spring height mm 449 448 434 425 413
Load under which spring height is .
173 mm am 432±17 417±17 397±16 353-383 336-364
The springs have been divided into two cate­
gories identifiable by a mark
yellow (*) for those with a height of >173 mm
under a load of:
green (*) for those with a height of <173 mm
under a load of:
432 daN 417 daN 397 daN 368 daN 350 daN
( ) Springs of the same type must be fitted
42 Print n° 506.763/23

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

Engine Marea- Marea Weekend 9 ™
Fuel feed system 2000 range @
10.
ELECTRONIC INJECTION CONTROL UNIT
The control unit processes signals from the various sensors by applying software algorithms and controls
the actuators accordingly (particularly the injectors and pressure regulator) to achieve the best possible
engine service conditions.
The control unit is "flash E.P.R.O.M." type, i.e. it can be reprogrammed from outside without andy need
to adjust the hardware.
The injection control unit contains a built-in absolute pressure sensor and is connected to the wiring by
means of a 121 pin connector.
Control unit connection identification (PIN-out)
4 5 43 24 6 25 96 106 113 105 119 120 121
1 Earth 25 Not connected
2 Earth 26 Not connected
3 Earth 27 Not connected
4 Actuator power supply 28 Not connected
5 Injector/ECU power supply 29 Not connected
6 Not connected 30 Not connected
7 Not connected 31 Not connected
8 Not connected 32 Not connected
9 Not connected 33 Not connected
10 Not connected 34 Not connected
11 Fiat CODE 35 Not connected
12 Not connected 36 Not connected
13 Injection relay
14 Glow plug control
15 Throttle body solenoid
16 EGR valve
17S VGT solenoid
18 Air conditioner relay
19 Radiator fan high speed relay
20 Radiator fan low speed relay
21 Diagnostic warning light control
22 Glow plug activation control
23 Not connected
24 Auxiliary fuel pump relay
10 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

Marea- Marea Weekend 9 *°
2000 range @)
Engine
Fuel feed system
10.
1. Undo the bolts (1) fixing the expansion
joint to the E.G.R. valve, disconnect the
pipe connecting the pneumatic valve and
the solenoid valve, then undo the bolts (3)
and remove the throttle casing.
2. At the bench, undo the bolts (1) and
separate the expansion joint from the throt­
tle casing.
The pneumatic valve (2) is secured to the
throttle casing.
E.G.R. VALVE
Removing-refitting
- Remove the throttle casing, following the
description in the previous paragraph.
3. Loosen the bolts (1) fixing the pipe con­
necting the E.G.R. and the heat exchanger.
4. Disconnect the electrical connection (1) for
the E.G.R. valve self-adjustment motor; undo
the bolts (2) fixing the E.G.R. valve to the
intake manifold, then lift up the valve and
remove the bolts fixing the pipe connected to
the heat exchanger (loosened previously).
Copyright by Fiat Auto VI 01 i ndate 31

Marea-Marea Weekend Electrical system
2000 range (§) Index
55.
page
PROTECTION AND SAFETY DEVICES
- Protection and security devices 1
- Junction unit 4
- List of fuses and main protected circuits 5
- Supplementary fusebox 8
LOCATION OF VEHICLE COMPO­
NENTS
- Location of vehicle relays and fuses. 9
- Location of control units and testing 12
sockets
CONTROL PANEL
- Control panel (except AT) 14
- Control panel (AT) 17
RADIO SYSTEM
- General description 19
- Warnings 23
- Description of controls 24
- Operation 33
- EXPERT control level 40
- Coding 44
- Compact Disc Player 46
- Cassette Player 47
- Multiple Compact Disc player 49
- Advice and precautions 51
Copyright by Fiat Auto XII-00 Supersedes previous, version

Marea- Marea Weekend
2000 range ©
Electrical equipment
Protection and security devices
55.
PROTECTION AND SAFETY DEVICES
All the vehicle supply lines were designed taking into account the most up-to-date directives in terms of
safety and protection, especially to prevent fires.
There are 2 types of protection:
- active protection, aims to reduce the causes of faults "at source"
- passive protection, aims to limit the effects of a fault as much as possible
The first category includes a carefully designed wiring layout with wires positioned and carefully anchored
on tracks that are repaired and protected if necessary.
The cables connected to the alternator and the motor were modified for this reason by adding protective
caps etc. A strengthened sheath was also introduced for some of the more exposed sections of wiring.
The passive protection includes all interventions to reduce faults due to high current (overload, short cir­
cuit).
All system fuses were rated based on the nominal absorbtion of the loads activated at the same time, to
ensure intervention in cases of a clear short circuit.
The introduction of a box containing 4 maxifuses with other fuses connected on the outside means all
the supplies can be protected except for the cable that connects the battery to the starter motor and the
cable that connects the starter motor to the recharging alternator. These cables are therefore protected by a
strengthened supplementary sheath.
In "MAXI" fusebox A:
EFI electronic injection fuse (petrol)
GLOW: plug fuse (diesel)
IGN: ignition switch fuse
J/B2 fuse master supply .
J/B1 fuse master supply
Next to the box.
B: fan fuse (see table)
C: ABS 60A fuse
D: second fan fuse: 40A (JTD)
115961 1998
iFil 30A IJ/B21 BOA
fiGNl 4OA IJTBTI BOA
1910JTD
IGLOWl 60A P7B21 80A
MGNI 40A IJ/Bll 80A
FUSE B
30A engine petrol without air conditioner
40A 1596 with air conditioning, JTD
50A 1998 wth air conditioning
Copyright by Fiat Auto 1

Electrical system
Protection and security devices
Marea-Marea Weekend
2000 range Q
55.
SUPPLEMENTARY FUSEBOX
Many shunt fuses are found under the facia
just above the junction control unit
The fuses are grouped in two special multiple
connectors, one for the front wiring the other
for the facia wiring, according to a pre-set
position and located as shown in the figure:
3A: front wiring
Fuse Protected circuit Amp
- F1 Fuse protecting ignition activated services (15/54) 7.5
- F2 Fuse protecting headlamp washers 20
- F3 Fuse protecting injection and CODE, fan 7.5
- F4 Fuse protecting ABS 10
- F5 Fuse protecting compressor and air conditioner 7.5
- F6 Fuse protecting injection memory and CODE, fan 7.5
3D: facia wiring
Fuse Protected circuit Amp
- F1 Fuse protecting ignition activated services (INT) 7.5
- F2 Fuse protecting foglamps 15
- F3 Fuse protecting rear electric windows 25
- F4 Fuse protecting front electric windows 25
- F5 Fuse protecting sunroof, seats, cigarette lighter 30
- F6 Fuse protecting airbag 10
8 Publication no. 506.763/24