2004 DACIA SOLENZA tow

ENGINE E7J-26210
ENGINE ASSEMBLY
10 - 34
CYLINDER HEAD REMOU NT I N G
Dismount the blocking device of the cyl-
inders jackets.
Mount: - cylinder head centering bushing on
the block; - cylinder head new gasket with the
marking “ TOP” upwards;
- cylinder head (lubricate the screws
ends and threads with engine oil).
REMARK:
In order to obtain a correct tighten-
ing of the cylinder head screws, remove
the oil that may be in the cylinder head
attachm ent whol es, by means of a sy-
rin ge.
CYL INDER HEAD TIGHTENING
METHOD
1. GASKET PRE-SETTING Tighten all screws to the required moment
of 2 daNm, then to an angle of 97° ± 2°,
observing the order indicated in the bellow
drawing.
Dismounting – Remounting
W ait for 3 minutes, stabilization time.2. CYLINDER HEAD TIGHTENING
Cylinder head tightening is to be performed
successive for the screws groups 1-2, 3-4,
5-6, 7-8 and 9-10; - unscrew 1-2 screws until total release;
- tighten the 1-2 screws to the required
moment of 2 daNm, then to 97°±2°
- repeat the releasin g and tightening op-
eration for the screws groups 3-4, 5-6, 7-8
and 9-10.
The cylinder head is not to be re-tight-
ened.
Continue by mounting: -rockers ramp, positioning item 1 from
the shaft towards distribution.
Tighten the ramp attachment screws 2 to the
required moment of 2.3 daNm, not be fore l u-
bricating with oil their heads and threads.
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16ENGINE E7J-262
16 - 3
ALTERNATOR – STARTER
INTENSITY (A)E NGINEE 7J
Nominal intensity 7 5 80
Minimal intensity, generated by the alternator with
maximum of consumers under operation 5 1 60
DIAGNOSTIC
Special tool: CLIP tester and accessories for physical measurements.
CH ARGING CIRCUIT CHECKING
CLIP tester i s enabling the a lternator checking, by m easuring t he genera ted vol tage and
intensity with and without electric consumers.
REMARK: The ammeter pliers is of inductive type 0 ÷ 1000 A. Its mounting is done
without the battery disconnecting, enabling so the memorized data preserving and the
adapting values from the injection c omputer.
Mount the ammeter di rectly on t he alternator e xit, having t he arrow directed towards the
alternator.
The measurements are to be performed in three stages :
- measurement of the battery voltage with contact taken off;
- measurement without consumers of the adjusted voltage and generated intensity;
- measurement, with maximum of consumers, of the adjusted voltage and generated in-
tensity.
The values resulting further to the measurements, lead to following interpretations:
- voltage battery (without consumers) < 12.3 V – indicating discharged battery.
Without consumers :
- adjusted voltage > 14.8 V – indicating defective regulator;
- adjusted voltage < 13.2 or charging current < 2A – indicating charging failure.
With consumers:
- adjusted voltage > 14.8 – indicating defective regulator.
- adjusted voltage < 12.7 – indicating that alternator charging current must be checked
compared with its characteristics:
If the measured current is too small, check the following:
- alternator wear (collector brushes, etc);
- battery connections;
- engine mass stripe;
- drive belt tension.
If the measured current is correct and the adjusted voltage is too small, the cause may be: -the vehicle has too many electric consumers;
- the battery is discharged.
Alternator
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IGNITION AND INJECTION
17
17 - 14
The e ngines equipped with UCE injection type SIRIUS 32 are provided with oxygen sensors, as
follows:
-one up stream oxygen sensor – for engines corresponding to EURO 96 de-pollution norms.
- one upstream oxygen sensor and one downstream oxygen sensor – for engine s corresponding
to EURO 2000 de-pollution norms.
OXYGEN SENSORS HEATING
Oxygen sensors heating control is given by UCE injection as follows: -for up stream oxygen sensor – starting with engine starting.
-f or downstream oxygen sensor – after a certain time from engine starting, imposed by the
UCE injection charts, being subject to engine RPM and water temperature, red only when the
accelera tion pedal is not released.
UPSTREAM OXYGEN SENSOR VOLTAGE
After connecting the CLIP tester select “ Injection Diagnostic” and refer to “PR009 parameter:
Upstream oxygen sensor voltage”. The displayed value, expressed in mV, is representing the voltage
supplied towards UCE injection by the oxygen sensor placed upstream as the catalyst. When the
engine is running in the “closed loop” phase, voltage must fluctuate quickly between the following
lim i ts :
-20 mV ± 50 for poor fuel mixture;
-840 mV ± 70 for rich fuel mixture.
Smaller is the difference between these two limits, less good the sensor information is
(g en erally this difference is of 500 mV).
DOWNSTREAM OXYGEN SENSOR VOLTAGE
After connecting the CLIP tester select “ Injection Diagnostic” and refer to “PR010 param-
eter: Downstream oxygen sensor voltage”. The displayed value, expressed in mV, is representing
the voltage supplied towards UCE injection by the oxygen sensor placed after the catalyst. This
sensor has the purpose to catalyst diagnostic and to perform a second checking, more exactly, of
the fuel mixture enriching. This function is becoming active only after a certain time of engine
running at warm and it is not active in the engine idling phase.
When the engine is running in “closed loop” phase and at stabilized speed, voltage must fluctuate
ha ving between the maximal and minimal limits a difference of 600-mV ± 100. At deceleration,
voltage mu st be under 200 mV.
Enriching adjustment
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IGNITION AND INJECTION
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17 - 15
ENRICHING CORRECTION
After connecting the CLIP tester, select “Injection diagnostic” and refer to “PR035 parameter:
En riching correction value”. The value displayed is representing the corrections average imposed
by the UCE injection, subject to the fuel mixture enriching, red by the upstream oxygen sensor (the
sensor is analyzing the oxygen concentration from the exhaust gases). The co rrection value has an average value of 128 and the limits are 0 and 255:
-a value lower than 128 has as result, the request for fuel mixture impoverishment
-a value greater than 128 have as results the request for fuel mixture enriching.
ENRI CHING ADJUSTMEN T PHASE
Admission in the enriching adjustment phase is becoming effective after a certain time from
en gine starting, with the condition that water temperature is reaching to over 22°C and 28 seconds
from engine star ting have passed.
If ad m ission in the enriching adjustment phase is not effective, the value of PR035 parameter is
128.
Even when conditions for enriching adjustment phase beginning are accomplished, UCE injec-
tion however, will not take into account the voltage supplied by the downstream oxygen sensor, in
the following situations: -acceleration pedal fully pressed: PR035 is variable and higher than 128;
-sudden ac celeration: PR035 is variable and higher than 128;
-d ecelera tion (engine braking) followed by UCE injection detection of the position ”free” of
the acceleration pedal: PR035 = 128; -down stream oxygen sensor failure: PR035 = 128.
WORKING PROCEDURE “DAMAGED” IN CASE OF DOWNSTREAM OXYGEN SENSOR FAILURE
When the voltage supplied towards UCE injection by the downstream oxygen sensor is not
correct (showing small or not at all variations) in the enriching adjustment phase, then UCE injec-
tion will not pass to the working procedure “damaged” (PR035 = 128) unless the failure has been
rec ognized as being present for 10 seconds. Only in these conditions, the failure will be memorized
by the UCE injection.
If UC E injection is detecting a present failure of the oxygen sensor and if this failure has been
al rea dy memorized, then UCE injection will come out from the enriching adjustment phase, passing
to phase “open loop”. In this situation PR035 parameter will not show variations and will have the
value 128.
Enriching adjustment
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IGNITION AND INJECTION
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17 - 16
PRINCI PLE
When the engine is in “closed loop” phase, the enriching adjustment is correcting the injection
time in order to be able to obtain a fuel mixture with the enriching as close as possible to 1. The
co rrec tion value is fluctuating around the value 128, within the limits 0 and 255.
Although, variations in time of the components elements parameter of the injection system may
occur, this leading to the enriching correction displacement towards 0 or 255, in order to maintain
the enrichment at the value 1. The adaptive correction is allowing the “resetting” of the injection chart in order to bring the
enrichment adju stment to the average value 128 and the achievement of an effective constant
correc tion for the enrichment or impoverishment of the fuel mixture.
The adap tive correction of the enrichment adjustment is divided into two components:
-p reponderant adaptive correction at engine medium or high charges (adaptive enriching
during running); -prepo nderant adaptive correction at engine idling or small charges (adaptive enriching
during idling).
The adap tive corrections are considering the value 128 as an average value after performing
the activation (after erasing the memorized failures) and they have for the next parameters, the
following limit va lues:
PR030 = Adaptive enriching during running 80< X < 176
PR031 = Adaptive correction during idling 80 < X < 176.
The ad apti ve corrections are not applied unless the engine is warm (water temperature > 80°C),
and it is in the “closed loop” phase and the pressure from the inlet manifold is in a certain interval.
It is necessary that engine has been run in “closed loop” phase in many of the inlet manifold
pre ssure areas, for which the adaptive correction evolution is starting the compensation of the
engine running enriching dispersions.
Therefor e, further to UCE injection re-activation, after erasing the memorized failures, when
the values PR030 and PR031 are 128, it will be necessary that a specific road test is to be per-
formed.
Enriching adaptive correction
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IGNITION AND INJECTION
17
17 - 50
DF102
P RESENT
OR
ME MO RIZED
C heck for leakage on exhaust line.
If the vehicle is mostly driven in town, perform an oxygen sensor cleaning.
C heck the connection and condition of the oxygen sensor connector .
R eplace the connector if necessary.
C onnect the 90 ways terminal box instead of the injection computer then check the insulation,
continuity and the absence of the parasite resistance on lines: Pin 45 injection computer > pin C upstream oxygen sensor
Pin 80 injection computer > pin D upstream sensor
Pin 63 injection computer > pin B upstream sensor
Fi x it if necessary.
If the proble m is persisting, repla ce the oxygen sensor.
If the problem is persisting after these checking, treat the other failures then perform the conformity
checking.
Note any other functional failures.
Fix any other possible failures.
AF
TER
REPARATION
RE COMMENDATIONS
OXYGEN SENSOR FUNCTIONAL FAILURE
It shows an incoherent information received b means of the upstream
oxygen sensor.
Apply this diagnostic if the failure is prese nt or memorized.
Diagnostic – Failures interpretation
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IGNITION AND INJECTION
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DF 271 ACTUATORS RELAY EXIT VOLTAGE
P RESENT 1. DEF Open circuit or short-circuit
OR
ME MO RIZED
Conditions for diagnostic appl ication at memorized failure:
Se t the conta ct off and wait until the communication with the computer
is lo st.
RECOMMEND AT IONS
REMARK : If failure “DF009 : Actuators relay control circuit” is
prese nt or memoriz ed, it must be treated as most important, because
th is could be the cause of the failure occurring.
C heck the condition of the battery and of the vehicles electric masses.
M end if necessary.
C heck the connection and condition of the actuators relay connector .
Re place the connector if necessary.
Check with the contact set on, the pr e se nce of the +12 V supply at pole 3 of th e actuators relay.
Fi x the electric routing on the line towards the corresponding fuse .
C heck with the contact set on, the presence of +12 V supply at pole 5 of the actuators relay.
Repl ace the relay if necessa ry
C heck the insu lation and continuity on the line:
Pin 66 injection computer > p ole 5 actuators relay
M end if necessary.
Disconnect one by one the elements (injector, canister purging valve…) and observe the +12 V
s upply at the exit pole 5 of the actuator s relay, in order to identify the damaged one .
Replace the damaged el ement.
P erform the operations from ” recommendations” for reparation confirma tion.
AF TER Fix any other possible failures
REPARATION Erase the failures memoriz ed by the injection computer.
Perform a conformity checking by means of the CLIP tester.
Diagnostic – Failures interpretation
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IGNITION AND INJECTION
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ET037ENRICHING ADJUSTMENT
RECOMMEND AT IONS No failure must be prese nt or memorized.
C heck the connection and condition of the upstream oxygen sensor connector
M end if necessary
C heck the ignition
C heck the tightening of the canister purging valve (a leak is appreciably disturbing the mixture
enriching achievement).
C heck the tightening of the exhaust line.
C heck the tightening of the intake manifold.
If the vehic le is drive n only in town, the se nsor may be clogged (try in charge driving).
C heck the petrol pressure.
If idling is unstable, check the valve s cle arance and the distribution.
If necessary, replace the oxygen sensor.
C heck the prese nce of +12 volts supply on upstream oxygen sensor.
C heck the insu lation and cont inuity of the connections between:
Pin 45 injection computer > Pi n C upstream oxygen sensor
Pin 80 injection computer > Pin D upstream oxygen sensor
M end if necessary.
Diagnostic – States interpretation
AF TER Restart the conformity checking from the beginning.
REPARATION
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