check engine DACIA SUPERNOVA 2004 User Guide

ENGINE E7J-A-2/6011
UPPER AND FRONT ENGINE UNITS
The engine is set at the tuning point (see Chapter 10, pages 10-19);
The screw-nut of t he stretching runner i s loosened;
The distri bution belt is taken off.
R
E-MOUNT ING
A new distribution belt is mounted ( see Chapter 10, pages 10-33);
The tension in t he di stribution belt is checked and a djusted, by m eans of MOT.1505
device, at the value of 145-185 Hz.
The opera tions are done in the reverse order of those in the dismantling process;
The screws are tightened at the couple;
It is c ompulsory t o tighten the crankshaft pulley a t a 2 daNm couple plus a n angle of
68
o+/-6o;
The compressor pulley ( AC) is re-mounted;
The be lt of the alterna tor a nd that of the compre ssor are stretched, oberving the
values of the mounting tension:
Alternator: 263 Hz+/- 10%
Co mpressor: 222 Hz+/- 10%.
11 - 2
DISTRIBUTION BELT
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ENGINE E7J-A-2/6011
UPPER AND FRONT ENGINE UNITS
SPECIAL TOOL- AND-CHECK SETS
MOT.1202-01 -”CLIC” collar-pincers
MOT.1505 -Device for measuring belt tension
MOT.484 -Device for jacket maintaining -Wrench for angular tightening
-Pincers for elastic collar
TIG H TENING CO UPL E S (daNm )
S crew-nut of stretching runner/pulley 5
Screw of crankshaft pulley 2+68
o+/-6o
Screws of pendular suspension stand 6.2
Screw-nut of hydro-elastic buffer 3.7
Wheel Screws 7.5
Co mbustion-head Screws 2+97
o+/-2o
To take apart :
-the connector of the induction coil;
-the fue l hoses (t he going- and re -
turn circ uit); -the connectors of the injectors;
-the plugs of the sparks;
-the induction coil.
11 - 3
CYLINDER HEA D FITTING
D
IS M O UNT ING
The car is placed on a two-column lift -
ing stand; The battery i s disconnected;
The cooling circuit is emptied at the
jack situated at the lower pa rt of the radia-
tor; The distribution belt is taken apart (see
Chapter Distri bution Belt);
The following are taken apart: -air-filter;
-the c onnector of the c lapper-posi-
tion potentiometer (1); -the acceleration cable;
-the connector of the atmosphe ric
pressure sensor (2);
-the co nnector of the step-by-step
engine (3); -the connector of t he air temperature
sensor (4) on the intake collector;
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ENGINE E7J-A-2/6011
UPPER AND FRONT ENGINE UNITS
The hoses of the thermostat stand are
disconnected;
To take apart :
-the thermic screen;
-the exhaust collector;
-the alterna tor;
-the guide of the oil-l evel gauge;
To take apart :
-the combustion-head screws, ex-
cept the scre w corresponding to A po-
sition, which i s only loosened, then the
combustion-head is turned round the re-
maining screw; -the cylinder-head;
The ja cket -mainta ining MOT.484
device is mounted.
Check the plane of the c ylinder-head.
11 - 4
CYLINDER HEA D FITTING
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ENGINE E7J-A-2/6011
UPPER AND FRONT ENGINE UNITS
RE-MOUNT ING
The plane of the fitting is cleaned and checked.
Mount the cylinder he ad with a new gasket.
The taking-apart opera tions are done in the reverse order.
The combustion-head is tightened ( see Chapter 10, pages 10-31).
The distri bution belt is mounted ( see Chapter 10, pages 10-33);
It is mounted in the reverse order of the taking-apart process;
The filling-up and the airing of the cooling circuit is done ( see Chapter “Filling-up
and draining” );
The rocker-arms are adjusted.
NOTE
At each operation requiring battery disconnection, when reconnecting, introduce
the radio code, which is written on the vehicle-buying invoice.
11 - 5
CYLINDER HEA D FITTING
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ENGINE E7J-A-2/6012
FUEL MIXTURE
CH ARACTERISTICS
ENGINE
Car Gearbox Ty p e Index Cylinder Stroke Cylinder
bore length volume
(mm) (mm) (cm3)
SupeRNova JH3-050 E7J A-2/60 75,8 77 1390 9,5/1
Check-ups in idle mood*
Motor Emisii poluan
i
Fuel
Type Index Mode CO(%) CO2(%) HC Lambda (minimum
(rot/min) (1) ppm l octanic number)
E7 J A-2/60 750+/50 0,5 14,5 100 0,97.. .. Unleaded petrol
max min max ....1,03 (CO95)
(1) at 2500 rot /min the CO value must be max. 0.30%;
* For water t emperature over 80
oC and after stabilizing at 2500 rot/mi n for 30
seconds; then turn ba ck into idle mode and the level of fumes is measured. The water-tempera ture a nd air-t emperature sensors are type NTC (negative
temperature coefficient), and the vari ation of their re sistance as to temperature
has the following evolution:
T (0C ) 0 20 40 80 90
A ir-T sensor
11970 - 7470 4045 - 3060 1600 - 1315 - -
R (Ohm)
Engine T 8000 - 67 00 3000 - 2600 1300 - 1100 300 - 270 215 -200
sensor
R (Ohm)
12 - 1
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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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