check engine light FIAT MAREA 2000 1.G Workshop Manual

Fuel feed system
Engine Marea- Marea Weekend © ™
2000 range @
10.
The control unit autodiagnostic system checks the signals coming from the sensors and compares them
with the figures allowed:
- signalling faults during starting
- warning light on for 4 seconds indicates test stage
- warning light off after 4 seconds indicates no fault with components that could alter the pollution con­
trol standard figures
- warning light on after 4 seconds indicates fault.
- signalling faults during operation
- warning light on indicates fault
- warning light off indicates no fault with components that could alter the pollution control standard fig­
ures.
- recovery
- from time to time, the control unit defines the type of recovery according to the components which are
faulty
- the recovery parameters are managed by components which are not faulty.
Control of cylinder balancing during idling
According to the signals coming from the sensors, the injection control unit controls the idle speed torque,
altering the injector operating times.
Control of irregular operation
Depending on the signals coming from the sensors, the injection control unit corrects the amount of fuel
to be injected in order to improve driveability and reduce jerking whilst driving.
The correction is achieved through the fuel pressure regulator and by varying the injector operating times.
Control of electrical balance
According to the battery voltage, the injection control unit alters the idle speed, to guarantee a sufficient
current supply from the alternator in situations where the consumers are absorbing a great deal of power.
The variation in the idle speed is achived by regulating the fuel pressure and altering the injector operat­
ing times.
VGT variable geometry turbocharger control (1910 JTD 110 CV)
The injection control unit processes the signal coming from the supercharging sensor, at the various en­
gine operating speeds, and determines the quantity of fuel to be injected, acting on the fuel pressure
regulator and the injector opening times.
In addition, through the solenoid valve, the control unit regulates the geometry of the turbine in order to
ensure optimum performance in all operating conditions.
Turbocharger waste gate valve control (1910 JTD 100 CV)
At the various engine operating speeds, the injection control unit processes the signal coming from the
supercharging sensor and determines the amount of fuel to inject, acting on the fuel pressure regulator
and the injector opening times.
In addition, the control unit controls the opening of the turbocharger waste gate valve, via the solenoid
valve, in order to ensure excellent performance in all operating conditions.
Control of throttle closing when engine is switched off
When the engine is switched off (ignition key in OFF position) the injection control unit closes the throt­
tle valve located on the air intake duct via the special solenoid valve.
This action makes it possible to limit the tiresome shuddering of the engine whilst it is switching off.
6 .i. V!-01-.Cancelftand replaces Print n° 506.763/25

Marea-Marea Weekend 9 -™ Engine
2000 range (j§) Fuel feed system
10.
I I TEST
4F017XJ01
A switch (1) on the brake pedal con­
trols the car brake lights; the same
switch sends a signal to pin 59 of the
injection control unit
The control unit uses the "brake pedal
depressed" signal to:
- detect a situation of over-run;;
- check the plausibility of the signal
from the accelerator potentiometer
CLUTCH PEDAL SWITCH
A switch (2) on the clutch pedal is connected to pin 61 of the injection control unit.
The injection control unit uses the "brake pedal operated" signal to distinguish gear engaged and gear
shift conditions.
PRESSURE RELIEF SENSOR
The sensor is fitted to the intake manifold and
the signal sent to the injection control unit is
used to:
- regulate injection pressure;
- regulate injection duration.
The figure alongside shows the sensor and
electrical connector with the following pin-
out:
1. pressure signal
2. Earth
3. Fuel feed system
ATMOSPHERIC PRESSURE SENSOR
The atmospheric pressure signal is built into the injection control unit. It is responsible for measuring at­
mospheric pressure in order to correct measured air flow and reference air flow values to control the EGR
function.
Copyright by Fiat Auto 17

Marea- Marea Weekend 9 ™
2000 range (Q)
4F019XJ01
1. Impeller
2. Volumes
3. Intake port
4. Outlet port
5. Rollers
6. Outer race
7. Pressure relief valve
4F019XJ02
Engine
Fuel feed system
10.
SUBMERGED FUEL PUMP ASSEMBLY
(AUXILIARY) AND LEVEL GAUGE CON­
TROL
The assembly consists mainly of:
- a roller-type fuel pump;
- a fuel level gauge;
- a fuel filter
The submerged fuel pump is volumetric type
with rollers and a motor with brushes and
permanent magnet excitation.
Impeller (1) is driven by the electric motor to
turn and create volumes (2) that move from
intake port (3) to outlet port (4).
These volumes are delimited by rollers (5) that
adhere to outer race(6) as the motor turns.
The pump is fitted with two valves: a check
valve to prevent the fuel circuit emptying
(with the pump off); a second pressure relief
valve (7) that short-circuits the outlet to the
inlet when pressures exceed 5 bars.
FUEL FILTER
The fuel filter is located in the engine bay.
The filter is cartridge type with a filter element
(1) made up of a pack of paper discs with a
filtering area of some 5300 cm 2 and a filter
gauge of 4 - 5 microns.
The filter is equipped with a fuel preheating
device (2) controlled by the engine control
unit via a relay.
The control unit activates or deactivates the
diesel filter on the basis of a diesel tempera­
ture signal sent by sensor (3) on the filter.
A plug (4) screwed to the base of the fuel
filter cartridge is used to drai off the water.
The plug incorporates a sensor for the detec­
tion of water in the diesel filter connected to a
warning light on the instrument panel.
1. Filter cartridge
2. Diesel preheating device
3. Diesel temperature sensor
4. Water drain plug with sensor to detect
presence of water in diesel filter
Copyright by Fiat Auto 19

Marea-Marea Weekend H nD Engine
2000 range (Q) Fuel feed system
10.
1. Grip the outer casing of the regulator, partly
extract it and, at the same time, rotate it so
that the fins (1) which contain the open­
ings for the fixing bolts are positioned hori­
zontally.
NOTA Do not grip the pressure regulator by
the electrical connector.
Insert the blades of two screwdrivers by the
fins (1) and very carefully extract the pressure
regulator.
NOTE Do not use a screwdriver or other
tools in the seal areas between the
regulator and the pressure pump.
2. Pressure regulator
1. High pressure seal (black or green)
2. Anti-extrusion seal (white)
3. Low pressure seal (black)
NOTE // the high pressure seal accidentally
remains inside the pump casing, turn
the ignition key to the ON position
(engine switched off); this will op­
erate the pump shaft and a small
amount of fuel and the seal will come
out.
NOTE Do not, under any circumstances, use any tools for extracting the high pressure seal and this
could damage the inner surface of the pump.
Refitting
- Suction off any impurities present inside the pump casing.
- Check the condition of the three seals and make sure they are correctly positioned before fitting.
- Slightly lubricate the outer surface of the three seals using vaseline. Do not, under any circumstances,
lubricate the other surfaces of the pressure regulator.
- Insert the pressure regulator in its housing on the pump, pressing gently and, at the same time, rotating
the regulator until it is is contact with the surface of the pump.
NOTE Do not, under any circumstances, use a hammer or other tools when fitting the pressure regula­
tor.
- Fit the two bolts fixing the pressure regulator to the pump acsing. and tighten them to a torque of
0.9±0.1 daNm.
- Reconnect the electrical connector and complete the refitting of the remaining components reversing the
order of the operations carried out for the removal.
Copyright by Fiat Auto |& yt-01 - Update 37

Electrical system Marea-Marea Weekend
Wiring diagrams 2000 range (jcj)
55.
DESCRIPTION
Marea-Marea Weekend
DESCRIPTION lnp> Ittpl a.t
PREDISPOSITION FOR CAR PHONE AND TELEPASS 33 33 33 33
ELECTRIC SUN-ROOF 35 35 35 35
HEADLLAMP ALIGNMENT CORRECTOR 37 37 37 37
ADJUSTABLE, HEATED FRONT SEATS 39 39 39 39
AIR BAG AND PRETENSIONERS AND FAILURE WARNING LIGHT 41 41 41 41
AIR BAG WITH SIDE BAG AND PRETENSIONERS AND FAILURE WARNING LIGHT 43 43 43 43
WINDSCREEN WASH/WIPE - REAR WASH/WIPE - HORNS - HEATED REAR WINDOW - HEADLAMP WASHER 45 45 45 45
INSTRUMENT PANEL CONNECTIONS 47 49 47 47
CHECK PANEL/DOOR CHECK CONNECTIONS — — — —
THERMOSTATICALLY-ADJUSTABLE CLIMATE CONTROL SYSTEM/HEATER 51 51 53 55
ADDITIONAL HEATER — — 57 —
VERSIONS WITH CLIMATE CONTROL
ENGINE COOLING 59 59 61 63
VERSIONS WITHOUT CLIMATE CONTROL
ENGINE COOLING 65 65 61 —
Xll-Oa-i.Supersedes previous version 'u • Publication no. 506.763/24

Electrical system
Component location
Marea- Marea Weekend
2000 range ©
DIRECTION INDICATORS AND WARNING LIGHT (WITH ALARM)
LIGHTS
Component key
1 Left front light cluster
2 Right front light cluster
3 Power fusebox
4 Junction unit
6 Instrument panel
7 Stalk unit
8 Left front earth
9 Right front earth
10 Battery earth on engine
11 Battery
12 Ignition switch
13 Connection between right/left front cables
16 Left tail light cluster
17 Right tail light cluster
18 Left rear earth
19 Right rear earth
HAZARD WARNING LIGHTS - BRAKE LIGHTS (WITH CHECK) - REVERSING
20 Left front side direction indicator
21 Right front side direction indicator
22 Left facia earth
23 Hazard warning light control switch unit
28 Connection between dashborad/rear ca­
bles
40 Brake lights control switch
41 Additional brake light
55 Connection between front/engine cables
100 Alarm electronic control unit
107 Door lock remote control receiver
159 Reversing lights control switch
236 Connection between rear cable and tail-gate
310 Connection shunt
55.
Left front light cluster
VN4C
AV4D
B
* AN n.d.
HN4C N8
1 3 Connection between right/left front cables
H2A
23A Hazard warning lights switch unit
'LB 7D
*AB4I
'AR4I
23B Hazard warning lights switch unit
*A4H .
' LR 7C AN 4H'
236 Connection between rear cable and tail-gate
CB28B
CB 26
HL 4E
RG4G
Marea Weekend
"The cables concerned are marked in the wiring diagram with an asterisk
12 XII 00 &jiii!-»cdes OMtfiuii.-. vtrsiun Publication no. 506.763/24

Electrical system
Component location
Marea- Marea Weekend
2000 range ©
DIRECTION INDICATORS AND WARNING LIGHT (WITHOUT ALARM) - HAZARD WARNING
ING LIGHT
Component key
IGHTS - BRAKE LIGHTS (WITHOUT CHECK) - REVERS-
1 Left front light cluster
2 Right front light cluster
3 Power fusebox
4 Junction unit
6 Instrument panel
7 Stalk unit
8 Left front earth
9 Right front earth
10 Engine battery earth
11 Battery
12 Ignition switch
13 Connection between right/left front cables
16 Left tail light cluster
17 Right tail light cluster
18 Left rear earth
19 Right rear earth
20 Left front side direction indicator
21 Right front side direction indicator
22 Left facia earth
23 Hazard warning lights switch unit
28 Connection between dashboard/rear ca­
bles
40 Brake light control switch
41 Additional brake light
55 Connection between front/engine cables
70 Connection between dashboard/front ca­
bles
107 Door lock remote control receiver
159 Reversing lights control switch
236 Connection between rear cable and tail-gate
328 Hazard warning lights relay
55.
Left front light cluster
VN4C
AV4D
B
HN 4C
1 3 Connection between right/left front cables
H2A
70 Connection between dashborad/front cables
A1 RN4C B1 M29 A2 VG 127 B2 V328* A3 VB 195A B3 AG 6A A4 HL26A B4 G n.d. * B5 AV4D B6 AB4D B7 LR4C B7 AN4C
EL GL n.d.
EL GV13
5§^LT]
El GV
1L AN 120 EL GV J B8 C8
236 Connection between rear cable and tail-gate
CB28B
CB26
HL4E
RG4G 4F014ML05
"The cables concerned are marked in the wiring diagram with an asterisk
14 XII-98 - Supersedes previous version Publication no. 506.763/24

Electrical system
Component location
Marea-Marea Weekend
2000 range ©
ALARM DEVICE AND DOOR CHECK
Component key
3 Power fusebox
4 Junction box
6 Instrument panel
8 Left front earth
10 Battery earth on engine
11 Battery
12 Ignition switch
18 Left rear earth
19 Right rear earth
22 Left facia earth
28 Connection between facia/rear leads
34 Switch control unit
35 Connection between dashboard/left front
door cables
36 Connection between dashboard/right
front door cables
42 Right dashborad earth
70 Connection between dashboard/front ca­
bles
86 Connection between rear/left rer door ca­
bles
87 Connection between rear/right rear door
cables
100 Alarm electronic control unit
105 Alarm deactivation switch
106 Alarm switch on bonnet
107 Door lock remote control receiver
108 Left rear door lock
109 Right rear door lock
110 Left front door lock
111 Right front door lock
236 Connection between rear cable and tail-gate
243 Luggage compartment light control button
310 Connection shunt
375 Standard tester input
55.
35 Connection between dashboard/left front door cables
'HVn.d.
Cn.d.
ZB67
ZG244A
B310E
CB244A
BV244A
Rn.d.
GV78B
AG 67
CN244A
87 Connection between rearl/right rear door cables
G 109A
BV83
H 109A
'HR109C
RN 83
BR 85
BN 83
ZB 85 Hn.d.
RN n.d.
HR 28B *
1 00A Alarm electronic control unit
' BV 375
G105A"
100B Alarm electronic control unit
*HG70_
'HN 70
*HR70
AR n.d. *
N 106* RN70'
*The cables concerned are marked in the wiring diagram with an asterisk
28 x" 00 -Supersedes previous version £ Publication no. 506.763/24