2004 DACIA SUPERNOVA light

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 - 12
ENRICHING ADAPTIVE CORRECTION
PRINCIPLE
In the “ closed loop” stage, t he enri ching correction va lue (PR 035) is adjusting the
injection times in order to obtain a ratio as close as possible to the enriching value = 1.
The correction value is close to 128, having as limits 0 and 255; nevert heless, dispersions
of the injection system components may occur, that a re giving the correction a displacement
towards 0 or 255, in order to obtain the enriching value 1.
The a daptive c orrection i s allowing the injection c hart displacement i n order to re -
focus the enri chment adjustment (PR 035) on the 128 value.
The values of the adjustment correction may be read by means of the CLIP tester, as follows :
- connect the tester to the vehicle diagnosis socket and to the battery (or to the lighter socket).
- select
“COMPUTERS TEST” , then “PETROL INJECTION”
- in the menu “FU NCTIONS TEST”, access “ENRICHING ADJUSTMENT”, where
you can find para meters PR 030= enriching a dapting in opera tion (the adaptive corre ction
for the partial and large charge s area) and PR 031= enriching adapting at idling (adapting
correction at idling and in small charges area).
PARAMETER FIELD
Enriching adapting in operation (PR 030) 80% £ X £ 176 %
Enriching adapting at idling (PR 031) 80% £ X £ 176 % ENRICHING ADAPTIVE CORRECTION
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 42
DIAG
NOSING-INTERPRETING THE DEFECTS
WATER TEMPERATURE ALERT CIRCUIT
1. Open circuit or short-circuit to mass of the way to pin 9 of the calculator
2. Short-circuit at 12 V along the way to pin 9 of the calculator.
DEFECT
PRESENTOR
MEMORIZED
Condition of breakdown detection by the calculator:
- start the engine and keep it at over 1500 rot/min for at least 10 sec-
onds.
Conditions of performing the diagnosing:
-the defect is present
-the defect has been memorized but is recorded in the “present” state.
SUGGESTIONS
26.
Check the connection an d th e co nd i ti o n of the connectors al on g th e ci rcuit:
pin 9 of calcul at or -> water tem pe ra tu re ale rt li ght in di ca to r (o n board).
Change connectors if necessary.
Check the co ndition of water te mp e rature al er t light indicator on board. On se t ting the
con tac t, it mus t fla sh for 3 se co nds , the n it turn s off .
Remedy if necessary.
Check if the electric bulb of th e water te m perature alert li gh t indicato r has 12 V, after
settin g the conta ct.
Remedy if necessary.
Connect the 90 - way terminal-tester instead of the calculator and check the insulation
and the con ti nui ty alo ng the circui t:
pin 9 of ca lc ul at or -> wa te r te mp er at ure al ert li gh t in di cat or (on bo ar d). .
Remedy if necessary.
Er ase defects memorized by the computer.
Perform the steps under “Suggestions” to confirm the repair.
Remedy other possible defects.
AFTER REPAIR
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 49
DIAGNOSING-CON
FORMITY TEST
Finally, the testing of the various states and parameters of the system will be done,
in the following situations:
A - With the stopped engine, and with contact set
B - With the hot engine, in idle mode, without consumers
C - During a route test.
LIST OF STA TES
Nr.
crt:Characteristics
1.
State: +After Contact to calculator
Parameter: Supply voltage of
injection calculator
Actuating relay command
Stat e: Connection for AC
Stat e: Configuration with anti-
st arter
Stat e: Connection with speed
translator
Stat e: Anti-starter
Acceleration pedal let free
Stat e: position of clapper when the
acceleration pedal is raised
Parameter: position of cla pper
Parameter : Memorized va lue for
t he position when the pedal is raised
Acceleration pedal slightly pushed
Stat e: position of clapper when ac-
cele ration pedal is raise d
Stat e: position of clapper when ac-
celerat i on pedal is comp letel y
pushed
A cceleration pe dal completely
pushed
Stat e: position of clapper when ac-
celerat i on pedal is comp letel y
pushed
Parameter: position of cla pper
Function
Battery
voltage
2.
Injection
calc ulator
configura-
tion
3. Anti-starter
4.
SUGGESTIONSA- With the stopped engine, and with contact se t
Visualizing and
Rema rks
Confirmed state
11.8V Confirmed state
if the car is
equipped with AC
Confirmed state
Confirmed state
Not confirmed
state
Confirmed state
0 Not confirmed
state
Not confirmed
state
Confirmed state
200 further problems
arise, refer to the
di agnosing of that
parameter
If further problems
arise, refer to the
di agnosing of those
states
If further problems
arise, refer to the
di agnosing of that
state
If further problems
arise, refer to the
di agnosing of those
parameters Diagnosis
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 50
DIAGNOSING-CON
FORMITY TEST
LIST OF PARAMETERS
5.Water te m-
perature sen-
sor Parameter
: water
temp erature X= Eng ine
temperature +/- 50C
If further problems
arise, refer to the diag-
no sing of that parameter
Parameter : air te mperature
Air tempera-
ture se nsor X= Temp erature
under engi ne ho od
+/- 5
0C
If further problems arise,
refer to the diagnosing of
that parameter
6.
P
ressure sen-
sor Parameter
: collector
pressure
Parameter : atmospheric
pressure If
further problems arise,
refer to the diagnosing of those parameters
X= Atmo s pheri c
pressure
X= Atmo s pheri c
pressure
7.
COMMAN D OF A CTUATO RS
8. Petrol pump Command:
relay of petrol
pu
mp
F unctioning of
petrol pump must be heard If
further problems arise,
refer to the diagnosing of that command
Command: low speed cool-
i ng ventilator
Command: high speed cool-
i ng ventilator F
unctioning of
l ow speed ventila-
tor must be heard
F unctioning of
high speed venti-
lator mu st be
heard If
further problems arise,
refer to the diagnosing of that command
If further problems arise,
refer to the diagnosing of that command
C
ooling
ventilator
If further problems arise,
refer to the diagnosing
for lack of conformity to
idle mod e adjustment
Pu
t hand under the
engine to feel its
functioning
Command:
idle mode adjust-
me nt engine
St
ep-by-step
engine
If further problems
arise, refer to the diag-
nosi ng defects along the
d raining valve circuit
Va l
ve must be
functional
Command: C
anister draining
valve
C
anister
draining
valve
9.
10. 11. If further problems
arise, refer to the diag-
nosi ng of the states of air
conditioning
Compress
or must
couple
Command:
AC must be op-
erated through the board
switch
Air condi-
tioning (AC)
12.
Command: Water tempe ra-
ture
alert light indicator on
board
Water te m-
perature alert
light indica-
tor
13.
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30
GENERAL
30 - 11
BRAKING SYSTEM DIAGNOSTIC
II.
CONSTANT EFFECT AT BEHAVIOUR
EFFECTS
Brakes not accomplishing the
required braking distance
Vibrating brakes
When braking, the vehicle ( front
p art) is left/right deviating
Braking
Heating brakes POSSIBLE CAUSES
- No n- un if o rm wo rn brake lin ings
(backing off);
- Brake linings slightly greased;
- Springs with modified characteristics.
- Brake disks with high wobbling;
- Inconstancy brake disks width;
- Particles abnormal deposit on brake disks
(oxidation between linings and disk).
- Front axl e suspension, steering (to be
checked);
- Stuck piston;
- Tires – wear, inflati on pressure;
- Rigid duct narrowed (flattening).
- Stuck piston;
Automatic adjustment : hand brake cable very
tighten.
REMARK :
Automatic recovering is performed by
means of the brake pedal, if there is no ab-
no rm al t ensi on in the hand brake cable
when released (hand brake released).
- Return spring.
- Insufficient hydraulic stroke of the brake
pump, not allowing the return at rest of
the brak e pump pistons ( brake pump
remaining under pressure);
- Stuck pistons or hardly returning;
- Rigid duct narrowed (flattening);
- Def ective adjustment of the hand brake
control.
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30
GENERAL
30 - 13
BRAKE FLUID
PERIODICITY OF THE BREAK FLUID CHANGE
The manufacturing conception of the brakes equipping the Dacia vehicles, especially
the di sks brake type (F 54 inner empty pistons, low qua ntity of fluid in t he c ylinders,
sliding calipers avoiding existence of a fl uid reserve in the less cooled area of t he wheel)
enable t he m aximum re jection of fluid vapori zation ri sk, even in c ase of intensive using of
brakes (mountain are a). The current bra ke fluids are subject in all cases to a slight degradation during the fi rst
months of use by a slight humidity absorpt ion seri es (see the Vehicle Warra nty and
Maintenance Booklet, for brake fluid change)
LEVEL COMPLETION
The wear of brakes pads and shoes generate a gradually diminution of brake fluid level
in its reservoi r. It is useless t o compensate t his diminution, because the level will be re -
stored in the moment of next changing the brake pads and shoes. Obviously, in the mean-
time, the level of brake fl uid in re servoir must not go down bellow the minimal mark.
HOMOLOGATED BRAKE FLUIDS
The mixture i n t he bra king circuit of two non compatible brake fluids may leads to loss
important risks mainly due to gasket damage
In order t o avoid such risks, it is obligatory t o use bra ke fluids checked and approved by
our laboratories and which are accordi ng to Norm SAEJ 1703, DOT 4.
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MECHAN ICAL ELEMENTS CONTROL
37
B. DE-BRAKING
After effort ending, the two pistons resume their initial position under the effect of the retainer
springs, while the fluid is coming back and the pressure is decreasing in both circuits.
PRIMARY CIRCUIT – PRESSURE LOOSING
Lack of pressure in the primary circuit leads to the following situation :
The primary piston is a dvancing up to the pin, so is controlling mechanically the secondary
piston. The secondary piston reaches a fluid pressure that shall operate on the piston – linings
assembly moving it t o the right, opening also t he second e xit of t he rear circ uit ( the by-pass
circuit) increasing the pressure for this circuit. In this moment, by means of the transducer, the warning light on the instrument panel is on.
SECONDARY CIRCUIT – PRESSURE LOOSING
Both pump pistons go on. The caliper cylinders of the front brake shall normally operate.
The secondary piston re aches its respective pi n, but the pre ssure will decrease (due to the
failure). BRAKE PUMP
37 - 2
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