2001 FIAT MAREA charging

Marea- Marea Weekend 9
2000 range ©
Engine
Fuel feed system
10.
TURBOCHARGER (1910 JTD 110 CV)
The turbocharger used in the application of the
EURO 3 standards in the variable geometry
type connected to the exhaust manifold.
The turbocharger is controlled by the engine
management control unit via a duty-cycle so­
lenoid valve.
The increased volumetric output for the engine
is achieved, in the case of variable geometry
compressors, through the use of:
- a centrifugal compressor (1)
- a turbine (2)
- a series of moving vanes (3)
- a pneumatic actuator (4) controlling the
moving vanes.
- asolenoid valve (5) controlling the actuator
The variable geometry turbocharger makes it
possible to:
- increase the speed of the exhaust gases in
the turbine at low engine speeds
- slow down the speed of the exhaust gases
in the turbine at high speeds.
The control of the speed (kinetic energy) of
the exhaust gases makes it possible to pro­
duce increased engine torque at low speeds
and greater maximum power at high speeds.
Operation at low rotation speeds
When the engine is operating at low speeds,
the exhaust gases possses little kinetic energy:
under these circumstances a conventional tur­
bine would rotate slowly, supplying a limited
supercharging pressure.
On the other hand, in the variable geometry
turbine (1), the moving vanes are in the
maximum closure position and the small pas­
sage sections between the vanes increase the
speed (C) of the intake gases.
Increased intake speeds lead to increased pe­
ripheral speeds (U) of the turbine and, conse­
quently, the compressor.
The speed of the gases inside the impeller is
indicated by the vector (W).
1. Turbine
2. Moving vanes
3. Pneumatic actuator
4. Rotary seal
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Engine
Fuel feed system
JTD Marea- Marea Weekend 9
2000 range @
10.
Operation at high rotation speeds
When the engine speed is increased, the ki­
netic energy of the exhaust gases increases
gradually.
As a result, the speed of the turbine (5) in­
creases and consequently the supercharging
pressure.
The VGT solenoid valve (2) operated by the
injection control unit (1), through the actuator
(4) causes the moving vanes to change posi­
tion until the maximum opening position is
reached.
1. Injection control unit
2. VGT solenoid valve
3. Vacuum reservoir
4. Pneumatic actuator
5. Turbine
There is therefore an increase in the passage
sections and consequently a slowing down in
the flow of exhaust gases which pass through
the turbine (1) at the same speed or slower
than the low speed conditions.
The speed of the turbine (1) decreases and
settles down at a suitable vaule for the correct
operation of the engine at high speeds.
1. Turbine
2. Moving vanes
3. Pneumatic actuator
4. Rotary seal
TURBOCHARGER (1910 JTD 100 CV)
It basically consists of two impellers (1) on
one shaft (2) which rotates on floating bear­
ings lubricated by a duct (3) from the engine
lubrication circuit.
The oil used dissipates some of the large
amount of heat given off by the exhaust gases
at the turbine.
There is a waste gate valve (4) fitted on the
turbocharger, operated by a pneumatic actua­
tor (5), that makes it possible to shutter the
flow of exhaust gases to the turbine, accord­
ing to the engine power/torque requirements.
The pneumatic actuator is controlled by the en­
gine management control unit via a solenoid
valve.
* The turbocharger used on the 1910 JTD 100 CV version is the fixed geometry type.
26 VI 0^ Cam.frtfi and ri!plact<& Print n° 506.763/25

Ma tea- Marea Weekend 9 m
2000 range ©)
Engine
Fuel feed system
10.
1. Undo the fixing nuts (1) and remove the
vacuum reservoir.
SOLENOID VALVE CONTROLLING
SUPERCHARGING PRESSURE
Removing-refitting
- Position the vehicle on a lift, then discon­
nect the negative battery lead.
2. Working from underneath the vehicle, dis­
connect the electrical connector (1) and
the pipes (2).
3. Press the retaining tab on the rear of the
mounting bracket and release the solenoid
valve.
FUEL FILTER
Removing-refitting
4. Disconnect the electrical connections (1)
from the fuel filter and the supply and re­
turn pipes to the tank and the supply pipes
to the pump (2), then undo the nuts (3)
fixing the fuel filter mounting. Lift up the
filter and disconnect the electrical connec­
tion (4) for the water in the diesel sensor.
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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
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Marea- Marea Weekend
2000 range ©
Electrical equipment
Control module
55.
Wiring diagram
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n ti
O Mill
(*) JTD
A. Battery recharging warning light
B. Low engine oil pressure warning light
C. Left direction indicator warning light
D. Right direction indicator warning light
E. Side lights warning light
F. Instrument panel symbol lighting
G. Main beam warning light
H. Air Bag fault warning light
I. ABS failure warning light
J. Fuel reserve warning light
K. Fuel level gauge
L. FIAT CODE system warning light
M. Injection system failure warning light
M1. EOBD warning light
N. Water in diesel filter warning light
O. Heater plugs warning light
(**) TD 75 BHP
P. Seat belt warning light
Q. Brake pad wear warning light
R. Low brake fluid/handbrake on/EBD sys­
tem failure warning light
S. Brake light electronic control module
T. Brake light failure warning light
U. Doors open warning ilght
V. Speedometer
W. Rev counter
X. Engine coolant temperature gauge
Y. Electronic module
Z. Milometer - trip meter/outside tempera­
ture gauge
Z1 Odometer reset button
* Short-circuit plugs
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Electrical equipment
Instrument panel
Marea- Marea Weekend
2000 range ©
55.
Rear side (the connector sockets are shown)
Connector A (on front lead) Connector B (on facia lead)
Pin no. Cable colour Circuit involved
1 BV EBD system failure
2 BN Brake fluid level
3 BR Brake pad wear
4 CL Heater plugs (JTD)
5 MN FIAT CODE
6 LN Injection system failure (JTD)
7 HN Battery recharging
8 HG Engine oil minimum pressure
9 LN EOBD (petrol only)
10 RV ABS fault
11 GN Reserve signal (petrol only)
12 VB Speedometer signal
13 AG +30 battery
14 CN Speedometer generator power sup­ply
15 HB engine coolant temperature
16 HL Outdoor temperature signal
17S HM Speedometer signal
18 L Rev counter signal
(*) not connected in this version
Pin no. Cable colour Circuit involved
1 RG Left brake light failure
2 RV Brake light switch
3 RV Brake light switch
4 C Air Bag system fault
5 GV Water in diesel filter (JTD)
6 M Seat belt
7 -N.C.
8 A Left turn signal
9 AN Right turn signal
10 -N.C.
11 GN Side lights
12 LB Main beam headlamps
13 BN Handbrake on
14 RN Right brake light failure
15 H Doors open
16 CN Boot open
17S -N.C.
18 GR Instrument panel light
19 N Lighting earth
20 HG Fuel level
21 GL Outdoor temperature display
22 R +15 from ignition
23 N electronic earth
24 -speedometer signal (*)
25 VN Speedometer signal
26 -speedometer signal (*)
16 Print n° 506.763/23

Electrical equipment
Control module
Marea- Marea Weekend
2000 range ©
55.
Rear side (the connector sockets are shown)
Connector A Connector B
N° Cable
colour Circuit involved
1 HN Generator (G)
2 BN Brake fluid level (J)
3 -Injection system failure (*)
4 AG +30
5 LN EOBD (E)
6 -Not connected
7 -Turbocharging (N)
8 BR Brake pad wear (K)
9 MN Fiat Code (L)
10 -Heater plugs (*)
11 -Not connected
12 HG Minimum oil pressure (H)
13 HM Speedometer signal
14 HL Outside temperature signal
15 CN Speedometer module supply
16 L Rev counter signal
17 HB Coolant temperature gauge
18 -Not connected
19 RV ABS failure (M)
20 -Trailer lights (*)
N° Cable
colour Circuit involved
1 LB Main beam headlamps (D)
2 GR Instrument panel light
3 GN Side lights (C)
4 -Not connected
5 BN Handbrake (J)
6 M Seat belt (I)
7 N Earth
8 -Speedometer signal (*)
9 VB Speedometer signal
10 A Left turn signal
11 AN Right turn signal
12 -Not connected
13 CA Automatic transmission (A)
14 N Earth (electronic)
15 GL Outside temperature switch
16 HG Fuel level
17 R + 15
18 C Air Bag failure (B)
19 GN Fuel reserve
20 -Speedometer signal
(*) not used
18 Print n° 506.763/23

Marea-Marea Weekend Electrical equipment
2000 range (§) Wiring diagrams
55.
DESCRIPTION
Engine types
DESCRIPTION 10i 0) c.a. 01/70
ANTI-LOCKING BRAKING SYSTEM (ABS) AND FAILURE WARNING LIGHT 67 67 67 67
STARTING - ELECTRONIC IGNITION AND INJECTION - RECHARGING AND WARNING LIGHT - INSUFFICIENT ENGINE OIL PRESSURE WARNING LIGHT - INJECTION SYSTEM FAILURE WARNING LIGHT -
REV COUNTER 69 69 — 71
STARTING - ELECTRONIC INJECTION - RECHARGING AND WARNING LIGHT - LOW ENGINE OIL PRESSURE WARNING LIGHT - HEATER PLUGS WARNING LIGHT - INJECTION SYSTEM FAILURE WARNING
LIGHT - FUEL PREHEATING — — 73 —
STARTING - EGR CONTROL - INJECTION CONTROL - HEATER PLUGS AND WARNING LIGHT - RECHARGING AND WARNING LIGHT - LOW ENGINE OIL PRESSURE WARNING LIGHT — — — —
AUTOMATIC TRANSMISSION - SYSTEM FAILURE WARNING LIGHT — 75 — —
DIAGNOSTIC SOCKECT CONNECTIONS 77 77 77 77
PREPARATION FOR TAXI 79 79 79 79
FM.B. The numbers in the table correspond to the page number of the electrical system in the manual
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