2004 DACIA SUPERNOVA Repair Manual

14E7J-A-2/60 ENGINE
ANTI-POLLUTION
RE-ASP
IRATION CONDITIONS
The canister-purging valve is controlled by pin 4 of the UCE injection, when : - water tempera ture > 50
oC;
- air tempera ture > 15
oC;
- the valve position outside idle position.
It is possible the reading of the RCO value ( opening cyclic ratio ) of the canister
purging valve, by means of the CLIP tester.
THE CHECKING OF THE CANISTER PURGING VALVE OPERATION
A non-operation of t he petrol vapors re-a spiration system may lead to the fuel c on-
sumption increase and to a unstable idling. It is necessary to check if the purging valve exit is correctly connected to the carbon
canister. Check also the piping condition between the canister and the fuel tank (sealing,
clogging on layout). PETROL VAPOURS-ASPIRATION
14 - 2
1. CO L LEC
TEUR ADMISSIO N
2. SOUPAPE PURG E
3. C ANI STER
4. RE SERVO IR
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14E7J-A-2/60 ENGINE ANTI-POLLUTION
Check at idling if there is a depression, by fitting a pressure gauge (-3…+ 3 bars) at the
purging valve exit (B) t owards canister. Is there any depression?
YES - Set off the contact . Using a vacuum pump, apply a 500 mbars depression at
the (C ) connection of t he purging valve. The value of t he re ad depre ssion must not vary
more than 10 mbars within 30 seconds. If change i s more than 10 mbars, then purging
valve is damaged and must be replaced. Valve cleaning of small active carbon part icles
may be tried, by low-pressure compressed air blowing at the valve (B) connection NO - When conditions of purging valve controlling are accomplished and this one
does not open, c heck its control electric circ uit ( be tween UCE i njection pin 4 and purging
valve), from continuity or short-circuit point of view. The RCO value of the signal received by the purging valve from the computer, may be
read by means of the CLIP tester in PROL 23. The m inimal value is of 0.7% (corresponding
to the closed position of the purging valve).
P
LACING - DIS M O UNT ING
Both t he c arbon c anister and the draining va lve are mounted by means of a stand on the
lining of the right-side front wing of the car.
The channellings of the c anister and the electri c conector c ommanding the draining
valve are disconnected;
The sleeve for fixing the dra ining valve is taken off and the valve is taken apart .
The carbon canister is taken apart .
REMOUNTING
Perform in the reverse orde r the dismounting opera tions.
14 - 3
PETROL VAPOURS-ASPIRATION
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E7J-A-2/60 ENGINE16
16 - 1
ST ARTING AND CHARGING
IDE NT IFIC ATIO N
ENGINE ALTERNATOR INT E NSITY
E7J - A-2/60 VALEO A11 VI 87 75A
VALEO A13 VI 212 80A
INSPE CT IO N
After 15 minutes’ warming under a 13.5 V voltage.
ENGINE REVOLUTIONALTERNATOR 75 A ALTERNATOR 80A
RATIO (rot/min) (A) (A)
1000 46 54
2000 68 75
3000 71 80
4000 72 82
FUNCTIONING AND DIAGNOSING
These c ars are equipped with interna l ve ntilation alternators, with i n-built voltage re gu-
lator a nd on-board light indicator, which must work as follows:
-when the contact is on, the light is on;
-when the engine start s, the light goes out;
-if t he l ight is on again as t he engine is runni ng, then i t i ndicates a charging dysfunc-
tion.
S
HOOT - FINDING INCIDE NT S
A.The light does not turn on when the contact is on.
To check:
-if the electric connections are done prope rly;
-if the light of the board indicator is working properly (when the circuit is set to the
mass, the light must turn on). AL
TERNATOR
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16E7J-A-2/60 ENGINE
16 - 2
ST ARTING AND CHARGING
B.The light turns on when the engine is running
This indicates a charging fa ult, the cause of which may be: - the carrying belt of t he alternator i s broken, the charging conductor i s cut (+ con-
tinuous); - a fault with the alternator (rotor, stator, diodes or brushes);
- a fault with the voltage regulator;
- a voltage surge (overvoltage).
C. The customer / user claims a fault with the charging, as the
on-board light works correctly.
If the re gulated voltage is less than 13.5 V, the alternator is checked. The cause of the defect may be:
- a burnt diode;
- disconnected or cut live wire;
- the coal powder or the wear of the collector.
C
ONTROL OF VO LTAG E
A voltmeter is connected across the terminals of the battery and the voltage value is
read.
The engine is run until the needle of the voltmeter settles at the regulated voltage. This value should be within 13.5 and 14.8 V.
The maximum of consumer devices are connected: the voltage should remain between 13.5 and 14.5 V.
CAUTION!
In case electric arc welding i s being done on t he car, the battery and t he voltage
regulator will be compulsorily disconnected (t he alternator).
AL TERNATOR
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E7J-A-2/60 ENGINE16
16 - 3
ST ARTING AND CHARGING
DIAGNOSING
Special device: Tester CLIP - SAGEM and accessories for physical measurements.
I
NSPE CT ION OF CHARG ING CIRCUIT
The CLI P - SAGEM tester allows the inspection of the alternator, by measuring the volt-
age and the curre nt supplied with, and without electri c consumers.
NOTE: The Ampere pincers are of the inductive type (0-1000 A). Its mounting
wi ll be done without disconnecting the battery, thus allowing for the memorized
da ta and the adapting values in the injection calculator to be preserved.
M ount the ammeter clamps directly to t he alternator exit, having the arrow oriented
towards this one
.
The measurements are effected in thre e steps: - measuring the battery voltage without contact on;
- measuring the regulated voltage and the current supplied without consumers;
-
measuring the regulated voltage and the current supplied with a maximum of consumers.
The values obtained as a result of t he measurements lead to the following interpretations: -the voltage of t he ‘empty’ battery < 12.3 V: so, the battery is flat;
With no consumers: -regulated voltage > 14.8 V: so, the regulator is faulty;
-regulated voltage (‘empty’) < 13.2 V or charging current < 2 A: so, there is a defect
of charging. With consumers: -regulated voltage > 14.8 V: so, the regulator is faulty;
-regulated voltage (‘empty’) < 12.7 V:the alternator charging current in regard to its
characteri stics must be checked.
IN TENSITY (A) EN GINEE7J
Rated intensity 75 80
Minimal intensity, which has to be supplied by the
altern ator to all working consumers 51 60
If the measured output is too little, the following will be checks:
-wear of alternator (collector brushes, etc.);
-battery connections;
-the mass braid of the engine;
-conformity of alternator;
-tension of carryi ng belt.
If the measured output is correct and the regulated voltage is too little, the cause may be:
-the car has too many electric consumers;
-the battery is flat. AL
TERNATOR
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16E7J-A-2/60 ENGINE
16 - 4
ST ARTING AND CHARGING
SPECIAL DEVICES
MOT 1505BELT TENSION MEASURIN G DEVICE
DIS M O UNT ING
The car is set on a two-column lifting stand;
Disconnect the electric connections from the battery.
The fuel supply conduit is uncoupled;
The following are taken off: - air filter;
- the oil-gauge tube;
- the top scre w of the alternator;
- the alterna tor belt;
- the stretching fl ange of the alternator.
The car is suspended.
The electric connectors of the alternator are uncoupled;
Di smount the alternator l ower attachment screw.
Lower the vehicle.
The alterna tor is taken out at the top.
AL TERNATOR
R
E-MOUNTING
The mounting opera tions are done in the reverse orde r;
The carrying belt of t he alternator is stretched to get the re commended ( 263
Hz+/- 10% ) mounting voltage;
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E7J-A-2/60 ENGINE16
16 - 5
ST ARTING AND CHARGING
The position of the alternator i s blocked.
The engine is revolved thre e and a half cra nkshaft turns;
The reading end of t he MOT. 1505 measuring device is placed in the measuring area;
The tension in the belt is measured;
It is checked whether t his fits i nto the mounting tension tolerance; if not, the belt will
be stretched again until the recommended tension ( 263 Hz +/- 10%) is reached.
The inspection a nd t he a djustment of the belt a re done with t he e ngine at ambient
temperature . Tighten at the require d moment, the alternator a ttachment screws :
- screw M10(lower attachment)-5 daNm
-screwM10 (upper attachment)-2.2 daNm.
Remark: Once dismounted, a belt is not to be remounted, but replaced.
MOT. 1505
MOT. 1505
AL
TERNATOR
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16E7J-A-2/60 ENGINE
16 - 6
ST ARTING AND CHARGING
DIS M O UNT ING
(in the air -conditioning variant)
The car is placed on a two-column lifting stand;
The electric connections are uncoupled from the battery;
The following are taken apart: -the top scre w of the alternator;
-the belt of the alternator;
The right-side front wheel of the car is taken apart;
The car is suspended;
The two screws fixing the shock-absorber on the steeri ng swivel stand are taken off;
The steeri ng swivel stand is lowered and the right-side planetary tra nsmission is taken
off the planetary pi nion of the gearbox; The electric conductors of the alternator a re disconnected;
The screw of the alternator is taken off;
The alterna tor is taken apart laterally past the right-side planetary tra nsmission.
R
E-MOUNT ING
The taking-apart opera tions are done in the reverse order;
The carrying belt of the alternator is stretched to obtain the mounting tension recom-
mended (263 Hz +/- 10% );
The position of the alternator i s blocked;
The engine is revolved thre e and a half cra nkshaft turns;
The reading end of the MOT. 1505 measuring device is placed in the measuring area;
The tension in the belt is measured;
It is checked whether t his fits into the mounting tension tolera nce; if not , the belt will be
str etched again until the re commended tension ( 263 Hz +/- 10%) is reached.
The i nspection and the adjustment of the belt are done with the engine at ambient
temperature .
Tighten at the require d moment, the alternator a ttachment screws :- screw M10 (lower attachment)-5 daNm
-screw M10 (upper attachment)-2.2 daNm.
Remark: Once dismounted, a belt is not to be remounted, but replaced.
AL TERNATOR
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