2004 DACIA SOLENZA air condition

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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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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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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16ENGINE E7J-262
16 - 5
ALTERNATOR – STARTER
21
Vehicles equipped with air conditioning
DISMOUNTIN G
Place the vehicle on a two-column elevator
Disconnect the battery
Dismount the alternator upper attachment screw.
Dismount the front right wheel.
Lift the vehicle.
Dismo unt :
- protection fairing;
- lateral tie-rod ( 1);
-s hock absorber two attachment screws (2) on steering knuckle.
Swing over the steering knuckle and remove the right planetary transmission from the plan-
etary gear of the gearbox. Disconnect the electric connectors of the alternator.
Dismount the alternator lower attachment screw.
Dismount the alternator’s belt.
Remove the alternator, laterally by the right planetary transmission.
REMARK:
In order to replace the alternator belt, first dismount the accessories driving belt
(compressor and/or power steering pump).
R EMOU 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 m ethod described in c hapter 07 “ Accessories belts tightening”)
Tighten to the required moment the alternator’s attachment screws.
REMARK:
A dismounted belt is not to be remounted, but replaced.
Alternator
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IGNITION AND INJECTION
17
17 - 4
Injection system
CHARACTERISTICS
• Electronic control unit (UCE injection) with 90 pins SIEMENS.
• Sequential multi-poin t injection.
• Controlling one injector each time.
• Static ignition with a double ignition coil.
• Canister purging valve controlled in opening duty cycle.
• Idling regime correction subject to:
- climate maintenance (air conditioning);
- battery voltage.
• Maxima l regime:
- 6200 rot/min for first, second and third speed;
- 6000 rot/min for fourth and fifth speed.
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IGNITION AND INJECTION
17
17 - 5
ELEMENTS LOCATION
1. RPM sensor ( tightening moment : 0.8 daNm);
2. Water temperature sensor (tightening moment: 2.5 daNm);
3. Atmospheric pressure sensor;
4. Step-by-step engine for idling adjustment;
6. Air temperature sensor;
7. UCE injection;
8. Choke sensor;
9. Fuse and relays box;
10. Air filter;
11 .D etonation sensor (tightening moment: 2.5 daNm);
12. Oxygen sensor (tightening moment: 4.5 daNm);
13. Ignition coil;
14. Carbon canister with purging valve included;
15. Power steering pressure controller(tightening moment: 1.2 daNm);
16. Air conditioning pressure controller (tightening moment: 0.8 daNm).
Injection system
13 10 11 5 4 6 3 2 1 8 9
14 1 6 15 12 7
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IGNITION AND INJECTION
17
17 - 10
MU LTI-POINT INJE CT ION CHARACT E RISTICS
〈 SIRIUS 32 with 90 pins computer is managing the ignition and the injection.
〈 For diagnostic, CLIP Sagem tester is to be used.
〈 The injection system in use is a sequential multi-point type, injection and ignition phases
controlling being based on the SIRIUS 32 computer program logic, starting from the signal received
from the RPM sensor.
〈The pr esence of the anti-pollution indicator OBD on the instrument panel, that is lighted for
3 seconds when setting the contact on, is specific to the vehicles observing pollution norms EURO
2000. The injection computer of these vehicles is provided with diagnostic system type OBD (“ On
Board Diagnostic).
〈 Idling regime correction is subject to:
-c limate maintenance on/off control (air conditioning)
-e lectrical balance on vehicle, as a result of connecting different electric consumers.
〈 EURO 2000 specific vehicles are provided with two oxygen sensors located in front of the
cata lyst (upstream oxygen sensor) and after catalyst (downstream oxygen sensor).
〈 At EURO 2000 specific vehicles, the fuel supply is performed at constant pressure (3.5 ±
0.2 bar), the pressure controller placed in the fuel tank being provided for this purpose.
Chara cteristics
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IGNITION AND INJECTION
17
17 - 11
AIR CONDITIONING UNIT IS USING A COMPRESSOR
WITH VARIAB LE DI SPLACE M ENT
Th e connections injection/air conditioning, are the followings:
- pin 46 of the injection computer is receiving the information “ air conditioning
re que st” further to the air conditioning switch acting;
- pin 10 of the injection computer will transmit the coupling control of the air
co nditioning compressor by means of the “A” relay, if the coupling authorization conditions are
accomplished.
The information “power absorbed by compressor” displayed when performing diagnostic by
means of the CLIP tester, is related to the couple value taken by the compressor. This is of 300-
5000W, the minimal displayed value being of 300 W, regardless the compressor coupled / unc oupled
c ondition.
Th e injection computer is forbidding the compressor coupling in the following situations:
-at less than 16 seconds from engine starting;
-subject to the power requested to the engine by the vehicle driver.
-when th e acceleration pedal is fully pressed;
-i f the engine RPM is lowering till 550 rot/min (compressor is again coupling if the RPM is
r eachi ng to 1800 rot/min);
-if the wa ter temperature has increased to over 110° C;
-if the engi ne RPM is exceeding 6000 rot/min.
Injection / air conditioning strategy
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