2004 DACIA SOLENZA air condition

IGNITION AND INJECTION
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PRINCIPLE
In engine normal operation conditions at warm, the RC O value is varying between a high and
a low limit, in order to obtain the nominal idling regime. Further to an operation dispersion
(ru nning in, engine clogging, etc), it may be possible that RCO idling value to be situated next to
the lower and higher values. The ad aptive correction of the “RCO idling ” parameter is allowing obtaining of slow variations
of the engine air requirement, so that RCO value centering on an average nominal vale is obtained.
Th is correction is becoming effective unless the water temperature is over 80°C, at 20 seconds
after engine starting and if it is in the nominal idling adjustment phase.
“R CO IDLING” AND “ IDLING EN RICHING ADAPTATION” VALUES
PARA M E T ER RE COM MENDE D VAL UE
PR006: Engine regime 750 rot/min
PR022: RCO idling 5%< X < 12%
PR031: Idling enriching adaptation 80 < X < 176
At each engine stopping, the injection computer is controlling the performing of a new position-
ing of the step-by-step engine, bringing it to the bottom limit. This function so called “re-setting”, is
main tained for 8 seconds.
INTERPRETATION OF T HE PREV IOUSLY M ENT IONED PARAM ETERS
In the situation of an air excess (infiltration air, valve body inadequate attachment, etc), the idling
re gi me will increase and the “RCO idling” va lue will decrease in order to return to the nominal
idling regime. The value of the RC O idling adaptive correction will decrease in order to centering
again the id ling adjustment operation.
In case of an air lack (clogging, etc) the reasoning is opposite: “ RCO idling” is increasing, and
the value of the “ RCO idling” adaptive correction will increase in order to center again the idling
opera tion on an average nominal value.
IMPORTANT: After erasing the failures memorized by the injection computer, it is necessary
to start the engine then stop it, in order to achieve in this way the re-setting of the step-by-step
en gine. Start then again the engine and let it idle run until reaching the nominal idling regime, in
or der to achieve a correct re-setting of the adaptive correction.
Idling regime adaptive correction
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IGNITION AND INJECTION
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At vehicles equipped with diagnostic system OBD (On Board Diagnostic), when detecting a
caus e leading to an excessive pollution, on the instrument panel the OBD indicator will be on,
indicating to the driver that vehicle must be repaired to eliminate the pollution cause.
The OB D system is taking into consideration during its operation of the performing the follow-
ing diagnostics: -electric diagnostics;
-c ombustion misfires diagnostics
-f unc tional diagnostic of the upstream oxygen sensor;
-c atalyst diagnostic.
El ectric and combustion misfires diagnostics are permanently performed.
Functional diagnostic of the upstream oxygen sensor and catalyst diagnostic are performed one
time only during one driving, subject to reaching the imposed values of the following parameters, in
or der to a.m. diagnostics commencement:
-water /air temperature conditions;
-v ehicle speed condition (evaluation field);
-e ngine parameters conditions (inlet manifold pressure, values fields and stability);
- starting timer.
OBD information management is completing classical electric failures management.
In orde r to meet this requirement, it is obligatory the OBD operation as per following way:
- lighting (or blinking for some failures) of the OBD indicator;
-memoriz ing of the OBD failures by UCE injection.
EFFEC TS ON DIAGNOSTIC AND REPARATIONS
During reparation of vehicles equipped with OBD system, a special attention will be given to
a void the OB D indicator lighting after reparations performing and returning the vehicle to the end-
user.
Certain failures can be noticed only during driving, this being the moment when the adaptive
values ar e ”learned ”, so: The reparation validation is obligatory imposed .
REMARK: all electric failures leading to pollution limit exceeding, will produce the OBD
indicator lighting.
ATTENTION: after each test performing, the contact setting on is imposed (key in M
position) before reading the res ults by means of the C LIP tester. Any contact sett ing off
be fore reading the test results, will lead to their wrong interpretation.
“On Board D iagnostic” system c haracteristics
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IGNITION AND INJECTION
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DIAGNOSTIC CONDI T IONS
If wh en setting on the contact, with stopped engine, one of the following conditions is accom-
plished: -air temperature, red by the air temperature sensor, is not situated between –6° and 119°C.
-w ater temperature, red by the water temperature sensor, is not situated between –6° and
119°C.
-atmosphe ric pressure is under 775mbar,
then the OBD diagnostics are not authorized until the next contact setting on. In order to have a correct operation of the OBD diagnostic system, no electric failure of the
injection system must exist, even if the lighting of the OBD indicator is not established. The catalyst and oxygen sensor diagnostics can not be performed in the same time, but one
after other.
When the catalyst or oxygen sensor diagnostics are under operation, the canister purging valve
is closed, and the adaptive values are “blocked” at the last existent value prior to a.m. diagnostics
starting. TESTS PERFORMING LOGIC
-Solve fa ilures of electric nature.
-Erase a ll failures by means of the CLIP tester
-Perform the “teaching” stage of all adaptive values by the injection system (if necessary).
OB D COMPLETE ACTIVATION BY MEANS OF CLIP TESTER
-Erase all memorized failures.
-Erase the “learned” values from UCE injection if further to an intervention on an injection
system component, a disturbance of the “learned” values took place (step-by-step engine, flywheel
or RPM sensor, etc).
RETENTIONS (“LEARNINGS”) NECESSARY FOR UCEINJECT ION FOR OBD DI AGNOSTIC
〈 COUPLING/SUPPLY RATE LEARNING (state “ET014 = cylinder recognition 1” is PER-
FORMED with running engine). This is to be performed as following:
-a deceleration with “cutting” of the petrol injection in the third gear of the gearbox, be-
tween 3000-3500 rot/min for at least 2 seconds,
-a second deceleration with ”cutting” of the petrol injection in the third gear of the gearbox,
between 2400-2000 rot/min, for at least 2 seconds.
〈 MIXTURE ENRI CHING ADAPTIVE LEARNING
In order to do that, it is necessary that vehicle is running observing in the same time the pressure
ranges men tioned in the chapter “ Enriching adaptive correction”.
〈 State “ET202 = OBD diagnostic of combustion misfires taken into consideration” must be
AC TIVE.
“On Board Diagnostic” diagnostic conditions
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IGNITION AND INJECTION
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Diagnostic – Failures interpretation
DF004
P RESENT
OR
MEMORIZEDWATER TEMPERATURE SENSOR CIRCUIT
1. DEF : Open circuit or short-circuit
RE CO MMENDATIONS
AFTER
REPARATION
C heck the connection and the state of the air tempe ratur e sensor connector.
Re place the connector if necessary.
C heck tha t resistance of wate r te mperatur e se nsor is not zero or infinite (sensor sur e failure).
Use chapter “Help” in order to compare the measured resistance values compared with
recommend ed ones).
Repl ace the wate r tempe ratur e se nsor if necessary.
C onnect the 90 w ays terminal box instead of the injection c omputer then c heck the insulation,
continuity and absence of the parasite resistance on lines: Pin 73 injection computer > pin B1 water temperature sensor
Pin 13 injection computer > pin B2 water temperature sensor
Fix if necessary
C heck the correct evolution of the sensor resistance subject to the temperature.
Repl ace the wate r tempe ratur e se nsor if necessary.
If the problem is persisting after these checking, fix the other failures the n perform the conformity
checking.
If failure “DF345 : Supply 5 volts potentiometers or transducers” is present
or memorized, this must be treated with priority.
Conditions for failure detection by the compu ter:
- Set the contact on
- If the failure is only memorized, st art the engine in order to obtain a temperature
variation (an engine cooling fan starting).
(The failure must pass to the present state, but i t may become again memorized
imme diately after finishing performing the previous operations).
* If the failure is memorized with OBD indicator on, check in the context part,
if state “ET275 : Water temperature sensor circuit” c orresponding to the
OBD indicator lighting request is affirma tive. In this case, proceed a s per
bellow mentioned method.
P erform the operations from “recommendations” for reparation confirmation.
Fix a ny other possible failures.
Erase the failures memoriz ed by the injection computer.
Perform a conformity checking by means of the CLIP tester.
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IGNITION AND INJECTION
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Conditions for diagnostic appl ication to memorized failure:
Set t he contact on.
* If the failure is memorized with OBD indicator on, check in the context
part, if state “ET255 : Idling adjustment circuit” corresponding to the
OBD indicator lighting request is affirmative. In this case , proceed as
per bellow mentioned method.
RE CO MM ENDATIONS
After repairing the step-by-step engine for idling adjustment, it may possible
that engine is not starting; in this situation, the “learning” stage of the adaptive
values by the injection computer must be again pe rformed (se e c hapter “
Enriching adaptive correction”).
Fi x any other possible failures then perform a conformity checking by means of
t he CLIP tester.
AF
TER
REPARATION
DF 060
P RESENT
OR
ME MO RIZEDIDLING ADJUSTMENT CIRCUIT
1.DEF : Open circuit or short-circuit
CO : Open circuit
CC. O : Short-circuit at mass
CC.1 : S hort-circuit at +12 volts
Check the connection and condition of the step-by-step engine connector for idling adjustment
R eplace the connector if necessary.
C heck the resistance of the step-by-step engine for idling adjustment. Refer to chapter “Help” in
order to compare the measur ed resistance values with the recommended ones.
R eplace the step-by-step e ngine valves if necessa ry.
C heck the insu lation, continuity and absence of the p arasite resistance on lines:
Pin 12 injection computer > pin B step-by-step engine for idling adjustment
Pin 41 injection computer > pin A step-by-step engine for idling adjustment
Pin 42 injection computer > pin C step-by-step engine for idling adjustment
Pin 72 injection computer > pin D step-by-step engine for idling adjustment
Fix if necessary.
If the problem is persisting after these checking, treat the other failures then perform the conformity
checking.
Diagnostic – Failures interpretation
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IGNITION AND INJECTION
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RECOMMENDATIONS
Diagnostic – Failures interpretation
DF 109
DF 110
P RESENT
OR
ME MO RIZEDPOLLUTED COMBUSTION MISFIRE
DESTRUCTIVE COMBUSTION MISFIRE
St ate ET014 : Recognition of the cylinder 1 must be active, in order to
i dentify each cylinder.
ET093 : combustion misfire on cylinder 1
ET094 : combustion misfire on cylinder 2
ET095 : combustion misfire on cylinder 3
ET096 : combustion misfire on cylinder 4
These w ill provide information regarding failure cause and location.
In this situation, the problem is probably due to an element that can act
only on one cylinder:
- Problem at injector
A cylinder is declared - Problem at spark plug
damaged : ET093 or ET094 - Problem at high voltage cable.
or ET095 or ET096. Before replacement, try the spark plug or cable changing to anothe r
cylinder.
Cy linders 1 and 4 or In this cylinders 2 and 3 declared situation, the proble m is probably
damaged : ET093 and ET 0 96 due to an eleme nt that can act only this pair of cylinders:
or ET094 and ET095. - Problem at ignition coil, at the high voltage part. - Problem at ignition coil, at the control part
In this situation, the problem is probably due to an element tha t can
F our cylinders declared act only on all cylinders:
damaged : ET093 and -Problem at fuel filter
ET094 or ET095 and ET096. -Problem at fuel pump
-Problem on in use fuel type
-Problem of in use spark plugs
In case by using this method the problem is not solved, cons ult the fail ures diagnostic DF109 / DF
1 10 CONTINUA TION
Ensure that all failures are solved. Erase all memorized failures.
There is no need to erase the “adaptive values” memoriz ed by the injection computer.
In order to check the correct reparation of the system, the following conditions must be
AF TER accomplished:
REPARATION - No more electrical failures;
- All “adaptive values” to be memorized by the injection computer;
- Warm engine (minimum 75°C);
- Run at idling, all consumers being in use for 20 minutes (1 minute DF110);
- If the failure is again occurring, repeat the dia gnostic.
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IGNITION AND INJECTION
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Va l ve potentiometer resistance Track = 1200 Ω ± 20 %
Slider = < 1050 Ω
Idling regulator resistance at 25°C= 53 Ω ± 10%
Ignition coil resistance Primary= 0.5 Ω ± 5 %
Se condary = 7200 Ω ± 10 %
Injector ’s resistance at – 40°C= 11.1 Ω
at 20C = 14.5 Ω ± 5%
at 120°C =20.6 Ω
Se nsor atmospheric pressure r esistance =50 kΩ
Upstream oxygen sensor heating resistance
For engines E7J-260-MA and E7 J-262 MB at 23°C = 6 ± 1Ω
Downstream oxygen sensor heating resistance for engines
E7J-260-MB, E7J-262-MB or upstream
for engine E7J-262-MB at 23°C= 3.3
+0.7 Ω
RPM sensor resistance at 23°C = 200 - 270 Ω
C anister purging valve resistance at 23°C = 26 Ω ± 7 %
Te m perature ( °C ) -40 -10 25 50 80 110 120
Air tempe ratur e se nsor 50000 9500 2051 810 309 135 105
Resist ance (ohms) ± 14 % ± 10 % ± 6 % ± 6 % ± 6 % ± 6 % ± 7 %
Water temperature sensor 75780 12460 2252 811 282 115 88
Resist ance (ohms) ± 9 % ± 9 % ± 5 % ± 5 % ± 3 % ± 2 % ± 2 %
Ignition system checking:
C heck the condition, insulation and continuity of the high voltage cables.
R eplace them if necessary.
C heck the condition and correct tightening of the ignition spark plugs and if the spark plugs are corresponding
with the recommended ones.
R eplace them if necessary.
C heck the condition of the ignition coil connectors.
Replace if necessa ry.
C heck the condition and the primary and secondary resistance values of the ignition coil.
R eplace if necessary
C heck the coils supply:
Pr esence of the +12 volts supply (contact set on).
C heck the ele ctric routing between the coil and the actuators relay.
M end if necessary.
Diagnostic – Help
-0. 3
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Diagnostic – Conformity checking
RECOMMEND AT IONS The values show n on this conformity checking are only as indication.
Performing conditions : St opped engine, contact set on.
Sequence Function Parameter / Controlled state or acti on Visualization Diagnostic
and Observations
3 Anti-starting ET002 : Anti starting PASSIVE In case of a
problemc onsult
t he DF004
diagnostic.
4V alve position Acceleration pedal release d.
potentiometer ET003 : valve pos ition for released pedal. Yes
PR 017 : measured valve pos ition.0 < x < 47
PR008 : position memorized vale for released pedal. 0 < x < 47
Acceleration pedal slightly pressed. In case of a
ET003 : released pedal valve pos ition.NOproblem
ET005 : valve position at maximum accelera tion NO c onsult
Acceleration pedal fully pressed. the DF017
ET003 : valve pos ition for released pedal. NO diagnostic.
ET005 : valve position at maximum accelera tion. YES
PR 017 : measured valve pos ition. 170 < x < 255
5Water In case of a
tem perature PR002 : water temperature X= engine problem
se nsor temperature ± 5°C consult the
PR002
dia gnostic
6Air In case of a
tem perature PR003 : air temperature X = under bonnet problem
se nsor temperature ± 5°C consult
the PR003
dia gnostic
7P ressure PR016 : atmospheric pressure X = atmospheric In case of a
trans duc e r pressure problem
PR001 : manifold pressure X = atmospheric c onsult
pressur e the PR001
dia gnostic
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