Page 74 of 891

ENGINE E7J-26212
12 - 2
F UEL M IXTURE
DENOMINATION PARTICU LARITIES
UCE injection SIEMENS - Connector with 90 ways
In jection system Sequential multi-point
I gnition Static with double coil PINI R (W)
I gnition control led by
RA- C0,52
ΩΩΩΩ
± 10%
UCE in
jectionRB-C0,52
ΩΩΩΩ
± 10%
R 1 -47,2 KΩΩΩΩ ±
10%
R
2-37,2 KΩΩ ΩΩ ±
10%
Characteristics
Detonation sensor Sagem – piezo-electric type
Tightening moment = 2 daNm.
RPM sensor ELECTRICFIL or SIEMENS
R = 200………….270 Ù
Spa rk plugs SAGEM – Type RFC 52 LZ
Ti ghtening moment = 2.5 –3 daNm
Fuel filter For de-pollution norm 1504
Mounted under the vehicle in front the fuel tank.
Replacement at every scheduled checking
For EURO 00 and EURO 96;
Insi de the fue l tank, attached on the fuel pump assembly.
Do not replace it separately.
Feeding pump Immersed in the fuel tank
For de-pol lution norm 1504:
- Flow: 1.3 l/min. Pressure: 3 bars at 12 V ten sion.
For EURO 00 and EURO 96:
- Pressure: 3.5 bars at 12 V tension.
Pressure regulator For de-pollution norm 1504:
Regulator attached on the injection ramp.
Adjusted pressure : 3 ± 0.2 b ars at zero depression
2.5± 0.2 bars at 500 mbars depression
For EURO 00 and EURO 96:
Mounted inside the fuel tank on the fuel pump assembly.
Adjusted pressure : 3.5 bars
Electro-magnetic Injectors SIEMEN S
R = 14.5 Ù ± 5 % AT 20 º C
Supply + 12V
Step by step engine R
A-D = 53 Ù 10% at 25º C
R
B- C = 53 Ù 10% at 25 ºC
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Page 76 of 891
ENGINE E7J-26212
12 - 4
F UEL M IXTURE
Body valve
2
2
1
I
II
DISMOUNTIN G
Disconnect the battery.
Dismount the air inlet duct from the battery
protection screen. Dismount the air filter four attachment
screws.
Disconnect the hose ( 1) for oil vapors re-
aspiration, between the cylinder head cover and
the air filter. Remove the air filter.
Disconnect :
〈 Dismount acceleration cable ( disconnect
the cable end from the body control lever and
extract it from the support sleeve) 〈 connectors
I – of the step-by-step engine
II – of the body potentiometer
( pull upwards the no.2 clamp and disconnect
the connector). Disconnect the body control lever
Dismount
the valve body.
REMOU NT I NG
Replace the valve body gasket.
Perform the dismounting operations in the
reverse order.
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Page 79 of 891
ENGINE E7J-26212
12 - 7
F UEL M IXTURE
Air filter
2 3
5
1
4
FILTER ELEMENT REPLACEMENT
Dismount the attachment
screws (1) of the air filter cover.
Detach the attachment clamps (2).
Remove the cover and replace the filter element ( 3).
DISMOUNTING OF THE AIR FILTER
Dismount the air filter inlet hose
Dismount the four-attachment screws (4)
of the air filter on the cylinder head cover and
inlet manifold. Lift the air filter and disconnect from the
filter, the oil vapors re-aspiration hose ( 5).
REMOU NT I NG
Perform the dismounting operations in the
reverse order.
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Page 85 of 891

ENGINE E7J - 26214
14 - 2
ANTI-POLLUTION
Pet rol vapors re-aspiration
OPERATING PRINCIPLE
The communication of the t ank with t he
atmosphere is done through the carbon can. The petrol vapors are retained when they are
passing through the active carbon from the carbon
can. By means of a purging valve controlled by a
RCO signal issued by UCE injection, the petrol
vapors are re-aspired through piping by the intake
manifold.
The flow section of the purging valve is
variable, subject to the balance given by the
magnetic field created by supplying the purging
valve coil and the power of the spring ensuring
the valve closing.
RE-ASPIRATION CONDITIONS
The can-purging valve is controlled by pin
4 of the UCE injection, in the moment when:
-w ater tempera ture > 20 ° C;
- air temperature > 10 ° C;
- engine is running over a certain im-
posed charge; -valve potentiometer is not in the posi-
tion acceleration pedal not pressed.
By using the CLIP tester, it is possible the
reading of the RCO value (opening cyclic
ratio).
The purging valve is closed for a value
smaller than 0.7%. OPERATION CHECKING OF THE
CAN PURGING VALVE
A defective operation of the petrol vapors
re-aspiration system, may lead to an unstable
idling or even to the engine stopping. First of all, check:
-circuit conformity (see the operating
diagram)
-piping condition between the can and
the fuel tank (sealing, circuit clogging).
The (B) piping coming from the tank shall
be clogged.
Connect a manometer (-3…+3 bar) at the
(M) connection for communication with the
atmosphere and check at idling if there is
depression. Is there depression?
YES – Set conta ct off. Usi ng a
vacuum pump, apply a 500 - mbar depression
at the (A ) piping connection of t he purging
valve. The value of the red depression must
not have a variation more than 10 mbar
wi thin 10 seconds.
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Page 87 of 891
ENGINE E7J - 26214
14 - 4
ANTI-POLLUTION
Oil vapors re-aspiration
1 2
CIRCUIT PRESENTATION
1 – Ho se for oil vapors re-aspiration, connected upstream of valve body between cylinder
head cover and air filter case (the circuit is used for middle and big charges).
2 – Hose for oil vapors re-aspiration, connected downstream of valve body between cylinder
head cover and intake manifold.
For a correct operation of the oil vapors re-aspiration system, the hoses must be kept clean
and in good condition.
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Page 91 of 891
ENGINE E7J-26216
16 - 4
ALTERNATOR – STARTER
SPECIAL TOOLS
MOT 1505 Belt tension measurement device
TIGHTENING MOMENTS (daNm)
Upper attachment screw 2,2
Lower attachment screw 5
MOT 1505
Ve
hicles without air conditioning.
DISMOUNTIN G
Place the vehicle on a two-column elevator.
Disconnect the battery.
Disconnect the fuel supply pipe.
Dismo unt :
- air filter;
- oil gauge pipe;
- alternator upper attachment screw;
- alternator’s belt;
- alternator tightening clamp.
Lift the vehicle.
Disconnec t the alternator electric connectors.
Di smount the alternator l ower attachment
screw.
Lower the vehicle.
Remove the alternator through the upper part.
REMOU NT I NG
Perform the dismounting operations in the
reverse order Tighten the alternator driving belt to 263
HZ ± 10% by means of the MOT 1505
device (see the method described in chapter
07 “ Accessories belts tightening”)
Tight e n to t he re qui red m om ent the
alternator’s attachment screws.
Alternator
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Page 95 of 891
IGNITION AND INJECTION
17
17 - 1
PRESENTATION
The system is composed of : -electronic control unit (UCE injection);
-a double ignition coil;
-f our spark plugs;
- spark plugs cables.
OPERATING PRINCIPLE
Subject to the information received from different sensors, but mainly subject to engine RPM
and charge, the electronic control unit will establish the advance at ignition, will identify the cylinders
being at upper dead point and consequently , will control the corresponding coil to them.
This is producing the spark at the level of the two cylinders being at upper de ad point,
interrupting the mass connection of the corresponding coil.
Ignition system
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Page 96 of 891
IGNITION AND INJECTION
17
17 - 2
IGNITION COIL
The system is including a double coil (X), controlled by the electronic control unit (UCE).
The coil has and electric connector (Y) with four ways, and is simultaneously producing sparks at cylinders
1 and 4, when it is controlled by the pin 32 of the UCE injection and at cylinders 2 and 3, when it is controlled
by the pin 1 of the UCE injection.
Ignition system
ELECTRIC CONNECTOR
PINS FUNCTION
AControlling ignition a t
cy linders 1 and 4
B Controlling ignition a t
cy linders 2 and 3
C Supply 12 V (+DC)
CHECKIN G RESISTANCE
BETWEEN PINS
A-C 0.52
± 10 % Ω
B-C 0.52 ± 10 % Ω
HT - HT 7.2 ± 10 % KΩ
X
Y
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