DACIA SUPERNOVA 2004 Owners Manual

E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 1
S
TATIC IG NIT IO N
PRE S E NT
AT IO N
The system is made up of:
- electronic control unit;
- double ignition coil;
- four sparking plugs;
- spark plugs.
DES CRIPT IO N OF FUNCT IO NING PRINCI PL E
Accordi ng to the data received from
various sensors, but essentially according
to the revolution ratio and the load of t he
engine, the electronic control uni t will de-
termine the ignition advance; it will also
identify the cylinders that are set at the
upper center point and, consequently, will
command the re spective coil. This c auses the spark at the level of the
two cylinders t hat are at the upper center
point, thus interrupting the m ass-setting of
the respective coil. T
HE CO IL
The system c ontains a doubl e c oil, con-
trolled by the calculator.
Coil no. 2 has an electric connector (1) with
four ways, whi ch si m ultaneousl y produc e
s parks at cylinders nos. 1 and 4, when it i s
commanded by pin no. 32 of the i njection cal-
culator, and on cylinders no. 2 and 3 when it
is commanded by pi n no. 1 of the same cal-
culator.
ELECTRIC CONNECTOR
Pins Function
AC ommands ignition at
cylinders nos. 1 and 4
BC ommands ignition at
cy linders nos. 2 and
CFuel supply (+DC)
inter - pin Rezisten
a
check între pini
A-B 1 W
A-C 0,5 W
B-C0,5 W
HT - HT 11 KW
IGNITION SYSTEM
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 2
EngineMakeType
E7J - A-2/60 EYQUEM RFN 58 LZ CHAMPION RC 10 PYC
Distance between electrodes: 0,9 mm
Tightening couple: 2,5 - 3 daNm
Plane stool with fitting
SPARKING PLUGS
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 3
I N J E C T I O N S Y S T E M
Peculiariti es of the multi-point system
90-pin calculator made by SIEMENS.
Multi-poi nt sequential injection. It commands an injector at a time, in turns.
S tatic ignition with double ignition coil.
Canister-dra ining valve controlled in a cyclical relation to the opening.
Correction of idle mode system in keeping with: -air-conditioning (AC);
-battery vol tage.
On -board injection light indicator;
Maximal load / regimen:
-6200 rot/min for gears: I, II, and III;
-6000 rot/min for gears: IV and V. PECULIARITIES
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 4
PLAC ING OF ELEMENTS
1.Can
ister-draining valve;
2. Air -filter;
3. Det onation sensor (tightening couple: 2.5 daNm);
4. Atmo spheric air-pressure sensor;
5. Step-by -step idle mode-adjustment engine;
6. Cla pper position potentiometer;
7. Air- temperature sensor;
8. Inje ction calcul ator;
9. Shock-s ensor;
10. Fuse-and- relay box;
11. Revolution sensor;
12. Water- temperature sensor;
13. Oxyg en sensor (tightening couple: 4.5 daNm);
14. Igniti on coil;
15. Carbon canister.
1 14 3 5 6 7 4 2 11
9
10
15 13 \
12 8
PLACING OF ELEMENTS
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 5
8. Injection calculator;
9. Shock-sensor;10. Revoluti on sensor;
11. Water-temperature sensor.
9
8
1
11
The fo
llowing relays can be identified in the fuse-box;
B = M otor-ventilator group relay (with Air-Conditioning)
H = Fuel-pump relay
C = Motor-ventilator group relay (without AC).
PLACING OF ELEMENTS
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 6
The water - temperature sensor
This sensor (no.1) sends the inform ation concerning t he water t emperature to t he c alcu-
lator, and ot her i nformation is sent t o the on-board indicator, which will di splay water
temperature . In case of emergency regarding water t emperature , the calculator will command the
lighting of the water-tempera ture alert indicator on the board. In keeping with the water-temperature information received by the calculator, it will
command:
-the injection system;
-the relays for the command of the motor-ve ntilator e ngine cooling group.
When setting the contact on, the water tempera ture indicator, placed on the instrument
panel, shall be lighted for 3 seconds then it shall turn off.
1
So, after setting the contact off, during next 2 minutes from engine stopping, the water
temperature reaches the value of 102 C and the injection computer is then control ling the
cooling blower starting at low speed. When the tempera ture is lowering at 96 C, the blower will be stopped ; its operation
must not be over 10 minutes after engine stopping. PLACING OF ELEMENTS
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 7
IN
JECTION-DISRUPTION LIGHT INDICATOR
THE SYSTEM PARTICULARITIES ( ANTI-STARTING INDICATOR )
On setting the contact, the injection calculator receives from UCE DECODING DE-
VI CE a c ode, which is then compared with t he one previously memorized; i f the two
codes are the same, then the start ing of the engine is authorized. After t he setting of t he c ontact, t he anti-start light indicator, which until then was fl ash-
ing on and off, will turn on for 3 seconds, and then it will turn off, thus confirming the
recognition of the key. If the key is wrong, after it has been put in the contact the light will turn on and off
quicker, and the engine starting will be impossible.
Ob servation:
Fo r details regarding the vehicle anti-start ing system, see chapter « Anti-starting
System » from the Workshop manual SupeRNova – vol.2, ed.I) PLACING OF ELEMENTS
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 8
THE ANTI-START FUNCTION
R
EPLACING UCE INJE CT IO N CAL CUL ATOR
The UCE injection
calculator is delivered without a code, but it is able to memorize a code.
When mounting a new c alculator, it will have to memorize the code anti-start fuction
singularity of this car, then one has to check if the a nti-start function is operational. In
order to do that, the following operations must be done: -the contact is set for a fe w seconds, then it is taken out;
-after t aking out the key, the anti-start function is actived.
I
NSPE CT ING THE ANT I - ST ART FUNCT IO N
Take the key out of the contact and after 10 seconds the anti-start light indicator on the
board must begin to flash on and off. When setting the contact on, the anti-start ing indicator must turn off.
THE INFLUENCE OF THE AIR-CONDITIONINGON THE INJECTION SYSTEM
The air-conditioning installation ( AC) uses a variable cylinder-volume compressor.
There are the following connections between the air-co nditioning and the petrol injection system:
-pin no. 46 of t he injection calculator re ceives the i nformation “ solicit accelera ted
idle mode” when the button for t he air-conditioning i nstallation is pre ssed and the pres-
su re of the freon in the installation is above a limit.
-the i nformation “ absorbed power” does not infl uence the idle m ode re gime, but lets
the calculator know about the value of the couple taken by the compressor, and the calcu-
lator will opera te the step-by-step engine, through pins nos. 12, 41, 42 and 72, in order to
compensate for the couple fall. With the tester it can read in t he m enu : « Parameters l ist «
the power absorbed by the compre ssor, wich will be between 300 and 5000 W. The value
that is re ad will be of m inimum 300 W, irre spective of the coupled / uncoupled state of the
compressor.
-pin no. 10 of the injection calculator will command the E relay located in the fuse-
box of the engine compartment, which will couple the compressor.
The injection calculator c an prohibit the coupling of the AC compre ssor:
-it does not allow the coupling of the compresso r before 10 seconds after the starting of the engine;
-accordi ng to the couple re quired from t he e ngine by the driver - a nd in cert ain
s ituations according to the power absorbed by t he c ompressor - the calculator c an forbid or
authorize the starting of the compressor;
-if the water temperature is higher than, or equal to 11 5
oC, the therm ic prot ection is oper-
ated, which will not authori ze the start ing of the compre ssor; -the overload protection doe s not permit t he coupling of t he compressor when the
revolution ratio of the engine is over 5900 rot/min.
PLACING OF ELEMENTS
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 9
IDLING REGIME ADJUSTMENT DUE TO BATTERY VOLTAGE
The idle mode of t he engine is influenced by the voltage of the battery with a view t o
compensating the voltage fa ll caused by the coupling of the consumers when the battery is
poorly charge d; this imposes an increase in the idle mode revolution ra tio, so the ratio of
the alternator will be incre ased by increasing the charging voltage. The lower the voltage,
the more significant the correction applied, which begins under 12.7 V.
The idle mode regime can thus be incre ased up to 830 rot/min.
If the injection calculator receives the information “command AC coupling”, then the
idle mode revolution ra tio will go up to 850 rot/min.
VA LUES « IDLING RCO « AND « IDLING RCO ADAPTATION «
P
RINCIPL E:
In order to use the information related to the parameters value “PR 021= RCO idling“
and “ PR 022= RCO idling”, the CLIP tester is to be used, which will be connected at the
diagnosis socket and at the vehicle battery ( or lighter socket). Select on tester m enu “COMPUTERS TEST”, then “PETROL INJECTION” . Find then
“FUNCTIONS TEST” and read here the progress of the PR 021 and PR 022 parameters.
In normal operation conditions, warm engine, the value RCO idling ( PR 022 ) is changing
between a maximal a nd a minimal value, so that nominal idling RPM is obtained. It is
possible that further to an operation dispersion ( runni ng in, engine choking up,etc) the
value “RCO idling” to get closer t o the minimal or m aximal value. The adaptive correction (PR 021 ) on “ RCO idling” (PR 022) is allowing r eaching at slow
variations of the engine air necessities, so that “RCO idling” is re-set on an average nominal
value. The parameters PR 021 and PR 022 are progressing among the following limits :
RA TED IDLE MOD E REGIME
(PR 006)
750 rot / min
RCO idling (PR 022)
5% £ X £ 12 % RCO idling
(PR 021)
-3 % .......+7 %
ID
LING REGIME ADJUSTMENT
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 10
In case of an excess (false air, non-conforming attachment of the valve body, etc) the
idling regime will i ncrease and the va lue “ RCO idling” will lower, returning so, at the
nominal idling regime. The value of the (PR 021) parameter will decre ase in orde r to realign idling RCO (PR
022) within the optimal ra nge. In c ase of a lack of air ( choking up, etc) the reasoning is
conversely : RCO idling (PR 022) will i ncrease, and t he va lue i s adjusting RCO idling (PR
022) on a avera ge nominal value.
IMP ORTANT
After battery disconnection/reconnection, it is obligatory engine starting and maintain
it for several minutes i n order to perform a correct resetting of t he adaptive correction
of the RCO idling. IDLING REGIME ADJUSTMENT
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