DACIA SUPERNOVA 2004 Repair Manual

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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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 53
DIAGNOSING-CON
FORMITY TEST
Canister
draining valve Stat
e: canister draining valve
Parameter: canister draining
valve RCO Confirmed state detonation
X < 0,7 %
C
anister draining not allowed
Draining valve stays shut
13.
G.M.V.
State: low speed ventilator
Parameter: water tempera-
ture
Stat e: high speed ventilator
Parameter: water tempera-
ture Not confirmed state
Ve n t
ilator must run when water
tem perature is over 96
oC
Confirmed state
Ve n t ilator must run when water
tem perature is over 102
oC
SUGGESTIONC - During a route test.
LIST OF STATES
14.
Can ist er drai n-
ing va
lve Para meter:
can ister d raining val ve
Para meter: can ister d raining val ve
RCO Confi rmed state
Can ist er drai ning is au thori zed
X > 0 ,7 % an d has vari ations1.
LIST OF PARAMETERS
Speed
t ran slator Para meter:
Car speed X = s p eed read on th e gau ge as
km/h If fu
rther
problems
arise, refer to
the diagnosing
of that
parameter2.
Detonation
sen s or Car un der lo ad
Para meter:
Det o nat ion si gnal
Para meter: Ant i -detonat ion co r-
rect ion X is variab le an d different fro m 0
0 oRAC If fu
rther
problems
arise, re f e r to
the diagnosing
of t hat param-
eter
3.
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 54
DIAGNOSING-CON
FORMITY TEST
5.Po l luting fumes At 25 00 rot/min aft er keeping fo r
30 seco nds
In idle mode, aft er settling ro tat ion
ratioCO < 0,3 %
CO
2 > 13,5 %
O
2 < 0, 8 %
HC < 100 ppm 0,97< l <1,03CO < 0,5 %
HC < 100 ppm 0,97< l <1,03
Aft er memo rizat ion
Para meter: en rich ment adap ta-
tion un der lo ad
Para meter: en rich ment adap ta-
tion in id le mode80 < X < 176
80 < X < 176
If further
problem s ari se,
refer to the
di a gnosing of
those param-
eters
Enri chmen t
ad ap tat ion4.
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 55
DIAG
NOSING-INTERPRETING THE STATES
STATECONNECTION SPEED TRANSLATOR
SUGGESTIONSThere shou ld be no defect present or memorized
Change the injection calculator if the car is unable to run at more than 40 km/h.
If further problems arise, refer to the diagnosing of the car speed parameter.
AFTER REPAIR
STATEANTI-STARTER
There shou ld be no defect present or memorized.
SUGGESTIONS
Check if the anti-starter device is defect.
If the cause is the anti-starter device, remedy the defect before doing this diagnosing.
Check the insulation and the continuity of the cabling along the circuit from pin 58 calculator.
If the defect has not been eliminated, refer to the diagnosing of the anti-starter device.
Perform again the conformity test.
AFTER REPAIR Perform again the conformity test.
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 56
DIAG
NOSING-INTERPRETING THE STATES
STATEIDLE MODE ADJUSTMENT
SUGGESTIONS There shou
ld be no defect present or memorized
Check the resistance of the step-by-step engine for the idle mode adjustment.
Change it if necessary.
Check the insulation and the continuity of the cabling along the circuits:
- pin 12 calc ulator ♦ pin B step-by-step engine
- pin 41 calc ulator ♦ pin A step-by-step engine
- pin 42 calc ulator ♦ pin C step-by-step engine
- pin 72 calc ulator ♦ pin D step-by-step engine
Remedy if necessary, and then go on with the diagnose, watching the tolerance value of
the idle mode rotation ratio.
The id le mode rotation
ra tio< minimal limit. The id le mode rotation ratio is too small.
-Check th e functioning of the enrichment adjustment.
-Clean the air supply circuit (clapper body, step-by-step engine) as they seem to be dirty.
-Ch eck th e oil level of the engine (too high a level causes splash lubrication)
-Ch eck the pressure of petrol (see if it is not too small)
-Ch eck en gine compression with the “CLIP TEHNIC” tester
-Ch eck the adjustment of the rocker-arms and the settling of the distribution.
-Ch eck the ignition system
-Ch eck the in jectors.
If all the above are correct, then the step-by-step engine will have to be replaced.
AFTER REPAIRPerform again the conformity test.
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 57
DIAG
NOSING-INTERPRETING THE STATES
The idle mode rotation
ra tio > maximal limit. The id
le mode rotation ratio is too great.
- Chec k the oil level of the engine
- Chec k the good functioning of the atmospheric pressure sensor.
- Check the tubes connected to the admission collector.
-C heck the fittings of the admission collector
- Check the watertightness fittings of the clapper body
- Check the watertightness of the power-brakes.
- Chec k the presence of the nozzles of the oil-vapour re-aspiration circuit
- Chec k petrol pressure.
- Check the adjustment of the rocker-arms and the settling of the distribution.
If all the above are correct, then the step-by-step engine will have to be replaced.
Perform again the conformity test
AF T E R REPAIR
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 58
STATEENRICHMENT ADJUSTMENT
SUGGESTIONSThere shou
ld be no defect present or memorized.
Check the connection and the condition of the oxygen probe connector.
Remedy if necessary.
Check the presence of + 12V at pin A of oxygen probe after setting the contact.
Check insulation and continuity along the circuits:
pin 45 calculator
♦ pin C oxygen probe
pin 80 calculator
♦ pin D oxygen probe.
Remedy if necessary.
- Check the ignition system
- Check the watertightness of the connections to the canister draining valve and to the can
ister (lack of watertightness in these locations considerably perturbs enrichment).
- Chec k the watertightness of the exhaust (i.e. exhaust-pipe) circuit.
- Chec k the watertightness of the intake collector.
- If the car on ly runs in town, the probe can be clogged (try to do a loaded running)
- If the idle mode running is unstable, check the adjustment of the rocker-arms and the
settling of the distribution.
- Chec k petrol pressure
- Chec k the injectors (the petrol flow and the shape of the flow).
If necessary, replace the oxygen probe.
AFTER REPAIR Perform again the conformity test.
DIAG
NOSING-INTERPRETING THE STATES
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 59
STATEAIR CONDITIONING AC COMPRESSOR REQUIREMENT
SUGGESTIONSNo defect should be present or memorized
The compressor
clutch do es n ot
couple Check the insulation and continuity along the circuit towards pin 10
injection calculator.
Remedy if necessary.
If
the incident persists, refer to the diagnosing of he air-conditioning.
AFTER REPAIRPerform again the conformity test
CALCULATOR POWER VOLTAGE
PA R AMETER
No defect should be present or memorized.
No consumer should be turned on.
SUGGESTIONS
The contac
t is set
If the voltage < the minimal voltage, then the battery may be flat.
Check the charging circuit, in order to detect the cause of the problem.
If the voltage > the maximal voltage, then it is possible that the
battery may be overcharged.
Check the charging voltage to be correct, with and without consumers.
In idle mode
If the vo ltage < the minimal voltage, then the charging voltage is too
small.
Check the charging circuit, in order to detect the cause of the problem.
If th e voltage > the maximal voltage, then the charge of the battery is
too high.
The vo ltage regulator is faulty.
Remedy this problem, and then check the level of the electrolyte in the
ba ttery.
DIAG NOSING-INTERPRETING THE STATES
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 60
DIAG
NOSING-INTERPRETING THE STATES
Remark:
The testing of the battery and the charging circuit can be done with “TECHNIC CLIP”
an d does not require disconnecting the battery, so it allow the conservation of the calculator
memory.
AFTER REPAIRPerform again the conformity test.
PA RAM ETER
CLAPPER POSITION
MEMORIZED VALUE FOR
FREE POSITION OF ACCELERATION PEDAL
SUGGESTIONSNo defect should be present or memorized.
The contact is set or the engine is started.
The value is
memorized at limit
or fa ilure to detect
the free pedal
po sition, or failure to
detect the completely
pushed down
position Check if the mechanic limitation of the potentiometer has been
a
ltered.
Check the command of the acceleration (friction, obstacles).
Check the resistance of the clapper potentiometer.
Change potentiometer if necessary.
Check the insulation, the continuity and the absence of contact
re sistance along the circuits:
pin 43 of calculator ♦ pin C of clapper potentiometer
pin 74 of calculator ♦ pin B of clapper potentiometer
pin 75 of calculator ♦ pin A of clappe r p otentiometer.
Remedy if necessary.
Th e po sition, of the
clapper is fixed
Check the resistance of the clapper potentiometer during the
operation of the clapper.
If the resistance varies, check the electric circuits connected to
the potentiometer.
If the resistance does not vary, check if the potentiometer is
mechanica lly coupled to the clapper.
Change the potentiometer if necessary.
AFTER REPAIRPerform again the conformity test.
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