2004 DACIA SUPERNOVA engine

E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 45
DIAG
NOSING-INTERPRETING THE DEFECTS
VENTILATOR RELAY COMMAND CIRCUIT
(for cars having no A.C.)
1. Open circuit or short-circuit to mass of the way to pin 8 of the calculator
2. Sh ort-circuit at 12 V along the way to pin 8 of the calculator.DEFECT
PRESENT29.
Conditions of breakdown detection by the calculator:
-take the contact and wait for the dialogue with the tester to be lost
-set the conta ct and enter dialogue.
Condition of performing the diagnosing:
-the defe ct is present
Note: this defect has to be correlated with the diagnosing of the water
temperature sensor circuit.
SUGGESTIONS
Check the connection and the condition of the connector of the 23 4 cooling ventilator
re lay.
Change the connector if necessary.
Check, af t er se tt i ng co nt a ct, the pr e sence of +12 V at po le 1 of the 234 re lay.
Remedy it if necessary.
Connect the 90 - way te r m in a l -tester instead of th e calculator an d check the in s ulation
and the con ti nui ty alo ng the circui t:
pi n 8 of ca lc ul at or
♦ pole 2 of th e 23 4 cooling ve nt il at or re la y.
Remedy if necessary.
Check th e coil of th e 234 co ol in g ventilator relay.
Change th e relay if ne ce ss ar y .
The problem is not yet solved! Consequently, the injection calculator must be changed.
CAUTION! The destruction of the calculator has probably been caused by an
ele ct ric sho ck.
The cause of the destru ction must be found before mounti ng a new
calcu lato r.
Er ase defects memorized by the computer.
Perform the steps under “Suggestions” to confirm the repair.
Remedy other possible defects.AFTER
R EPAIR
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 46
DIAG
NOSING-INTERPRETING THE DEFECTS
FUNCTIONAL BREAKDOWN OF THE OXYGEN PROBE
La ck of coherence of the information received from the oxygen probe.DEFECT
PR ESENT OR
MEMORI ZED30.
Note down other functional defects.
Erase the defec ts memorized by the calculator.
Remedy other possible defects.AFTER
R EPAIR
Check that there is no “false air” caused by the lack of watertightness along the exhaust
circu it up to the oxygen probe
Remedy if necessary.
If the car ha s been running for a long while in town, clean the oxygen probe.
Check the connection and the condition of the oxygen probe connector.
Change connector if necessary.
Check the heating resistance of the oxygen probe.
Change oxygen probe if necessary.
Check, after setting the contact, the presence of +12V (after the actuating realy) at pin A
of the oxygen probe.
Remedy if necessary.
Connect the 90-way terminal-tester instead of the calculator and check the insulation,
the continuity and the absence of contact resistance along the circuits:
pin 45 of c alculator
♦ pin C of oxyg en probe
pin 80 of calc ulat or
♦ pin D of oxygen probe.
Remedy if necessary.
Connect the 90-way terminal-tester instead of the calculator and check the insulation,
the continuity and the absence of contact resistance along the circuit:
pin 63 of calculator
® pin B of oxygen probe.
Remedy if necessary.
If the incident persists, replace the oxygen probe.
SUGGESTIONS
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 47
DIAG
NOSING-INTERPRETING THE DEFECTS
POLLUTING COMBUSTION MISFIRE
DESTRUCTIVE COMBUSTION MISFIRE
1. Combustion misfire during the last running done
2. Confirmed combustion misfire.DEFECT
PR ESENT
Combustion misfire at cylinder 1
Combustion misfire at cylinder 2
Combustion misfire at cylinder 3
Combustion misfire at cylinder 4.
Furnishe s informa tion c onc e rning the na ture and loc ation of bre a kdown.
SUGGESTIONS
31.
Connect the tester and select “Test of ignition”.
Watch the indications and replace the necessary parts.
Connect the tester and select “Test of compression”.
Watch the indications and replace the necessary parts.
Connect the tester and check the cogs of the flywheel.
Remedy if necessary.
If no defect is found ou
t, then there is a problem with the fuel-supply circuit. You must
check:
-p etro l filter
-f low and pressure of fuel
-condition of petrol pump
- if there are impurities inside the tank
-condition of injectors.
Remedy the elements of the fuel-supply circuit that are faulty.
Note down other functional defects.
Erase the defec ts memorized by the calculator.
Remedy other possible defects.
AFTER REPAIR
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 48
DIAG
NOSING-INTERPRETING THE DEFECTS
COMBUSTION MISFIRE AT CYLINDER 1
COMBUSTION MISFIRE AT CYLINDER 2
COMBUSTION MISFIRE AT CYLINDER 3
COMBUSTION MISFIRE AT CYLINDER 4
It must be said that in infrequent cases the indication of the faulty cylin-
der is not exac t; the calculator can declare cylinder 1 as not working,
while it is not faulty. So, you have to check this cylinder as a priority,
an d if everything s correct, the other cylinders will be checked. These
indications will only be used if the polluting or destructive combustion
m isfires are present.
SUGGESTION
In this case, the problem is probably caused by an element which acts
only on this cylinder:
- its injector
-the spar k plug of this cylinder
-the plug of the spark for that cylinder.C YLINDER 1 IS
DECLARED
FAULTY
32.
In this case, the problem is probably caused by an element which acts
only on this couple of cylinders (1 and 4 or 2 and 3):
-t he high-tension part of the ignition coil for cylinders 1 and 4 or for
cy linder 2 and 3
-the command part of the ignition coil for cylinders 1 and 4 or for
cy linder 2 and 3.CYLINDERS 1
AND 4 OR
C YLINDERS 2
AND 3 ARE
DECLARED
FAULTY
F OUR
C YLINDERS
ARE
DECLARED
FAULTYIn this case, the problem is probably caused by an element which
acts on all the cylinders:
-t he petrol filter
-the petrol pump
-t he quality of the petrol.
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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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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 51
DIAGNOSING-CON
FORMITY TEST
SUGGESTIONS B - Wi
th the hot engine, in idle mode, wit hout consumers
Battery voltage
LIST OF STÃTES
State: +After Contact to calc u-
lator
Parameter: Supply voltage of
calc ulator
If the parameter: Supply volt-
age of calc ulator
Th en the parameter: Engine
rotation ratio Confirmed state

13V X<12.7
750 rot/min If further prob-
l
ems arise, refer
to the diagnosing
of that param-
eter
Petrol pump com-
m and
State: Co mmand of actuators’
relay
Confi rmed state
Confi rmed state
Stat e: Petrol pump relay com-
m and
Co mmand of ac-
tuat ors
If furthe r prob-
l ems arise, refer
to the diagnos-
ing of the rota-
tion signal infor-
mation defectConfi rmed stateStat e: Ro tation signal
Ro tation signal
If further
proble ms arise,
refer to the
“Diagnosing Conditions”
Confi rmed stateSt ate: Recognition of the 1
cylinder
Recognition of the
1 cylinder
1.
2.
3.
4.
5. Heating of oxygen
probe Stat
e: Heating of oxygen
probe
Confi rmed state
Cl apper potenti-
ometer Stat
e: Pos ition of clapper of
acceleration pedal: free (raise d)Confi rmed stateIf further
problems arise,
refer to the
di agnosing of
that parameter
Stat e: Idle mode adjustment
Parameter: engine rotation
Parameter: To lerance of idle
m ode regimen
Parameter: Idle mode RCO
Parameter: Idle mode RCO
adapta tion.Confi rmed state
725 < X < 7 75 rot/min
-25 < X < +25 ro t/min
5 % < X < 12 %
-3 % < X < 7 % If furthe
r prob-
l ems arise, refer
to the diagnos-
ing of that state
Idle mode adjust-
m
ent
6.
7.
8.
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 52
DIAGNOSING-CON
FORMITY TEST
Pressure circuitParameter: Collector pres-
sure
Parameter: Atmospheric
pressure 290 < X < 370 mbar
X=Atmos
pheric
pressureIf further problems
arise, refer to the
di agnosing of those
p arameters9.
Parameter: Detonation sig-
nal 30 < X < 70
If
further problems
arise, refer to the
di agnosing of that
p arameter
Anti-detonation
circuit
10.
LIST OF STÃTES
LIST OF PARAMETERS
Enrichment
adjustment
Stat
e: enrichme nt adjustment
Parameter: tension of oxygen
probe
Parameter: enrichme nt ad-
justm ent correction Confirmed state
20mV 0 A verage = 128 If
further problems
arise, refer to the
di agnosing of that
state
Stat e: Air-conditioning re-
quirement
Stat e: Accelerated idle mode
Stat e: AC compressor
Parameter: en g i ne ro t ation ratio
Parameter: power absor bed
by AC compressor
State: Ai r-condit ioning requirment
State: Accelerated idle mode
Stat e: AC compressor
Para meter: en gine ro t ation ratio
Para meter: power ab s o rbed by
AC co mp res sor Confi rmed state
Lig ht indicat or is on
when AC co mman ds
co upling of co mpres -
sor
Confi rmed state
Lig ht indicat or is on
when accel erated idle
mo d e is active
Confi rmed state
Lig ht indicat or is on
when injection au tho-
ri zes co u pling of co m-
pressor
75
0 3 00 Not co nfirmed sta te
Confi rmed state
Not co nfirmed sta te
If th e injection does
not auth ori ze co upling
of compres sor
75 0 X<25 0 W
Confi rmed state
Ventilator must have
low rotation ratio
Sta te: Low sp eed ven tilat or
If further problems
arise, refer to the
di agnosing of those
states
11.
12.
Air-conditioning
(board-com-
m
anded AC)
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