engine DACIA SUPERNOVA 2004 Repair Manual

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.
vnx.su

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.
vnx.su

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
vnx.su

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
vnx.su

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
vnx.su

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.
vnx.su

E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 61
DIAG
NOSING-INTERPRETING THE STATES
PARAM ETERWATER TEMPERATURE
SUGGESTIONSNo defect should be present or memorized
If the value read is not real, check if the sensor for water temperature correctly follows the
“standard curve of the resistance according to temperature”.
Replace sensor if there are deviations.
REMARK: a sensor displaying deviations regarding the normal evolution of its param
eter s has previously undergone an electric shock.
Check the insulation, the continuity and the absence of contact resistance along the circuits:
pin 13 of calculator
♦ pin B2 of water temperature sensor
pin 73 of calculator
♦ pin B1 of wa ter temperature sensor.
Remedy if necessary.
AFTER REPAIR Perform again the conformity test.
SUGGESTIONS No defect should be present or memorized PA R A METER
AIR TEMPERATURE
If the va lue read is not real, check if the sensor for air temperature correctly follows the
“ standard curve of the resistance according to temperature”.
Replace sensor if there are deviations.
REMARK: a sensor displaying deviations regarding the normal evolution of its param
eter s has previously undergone an electric shock.
Check the insulation, the continuity and the absence of contact resistance along the circuits:
pin 49 of calculator
♦ pin 1 of air te mperature sensor
pin 73 of calculator
♦ pin 2 of ai r temperature sensor.
Remedy if necessary.
AFTER REPAIR Perform again the conformity test.
vnx.su

E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 62
DIAG
NOSING-INTERPRETING THE STATES
PARAM ETERCOLLECTOR PRESSURE
ATMOSPHERIC PRESSURE
Check the insulation, the continuity and the absence of contact
resistance along the circuits:
pin 15 of calculator
♦ pin A of atmo spheric pressure sensor
pin 16 of calculator
♦ pin B of atmo spheric pressure sensor
pin 78 of calculator
♦ pin C of atmo spheric pressure sensor.
Remedy if necessary.
If all the above are correct, replace the atmospheric pressure
sensor
SUGGESTIONSNo defect should be present or memorized
Collector pressure not
r eal after setting
contact.
Co llector pres s ure <
Min. in idle mode.
Atmospheric pressure
not r eal
Check:
- watertightness of tube between the atmospheric pressure sensor
and the intake collector
- adju stment of rocker-arms
- canister draining valve, which should be closed in idle mood
- cy linder compression, controlled with “CLIP TEHNIC”
If all the above are correct, replace the atmospheric pressure sen-
sor
Collector pressure <
Max. in idle mode.
Perform again the conformity test.
AFTER REPAIR
vnx.su

E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 63
DIAG
NOSING-INTERPRETING THE STATES
PARAM ETERDETONATION SIGNAL
SUGGESTIONSNo defect should be present or memorized
The de tonation sensor should generate a signal, the amplitude of which must differ from 0,
a proof of the fact that it perceives the mechanical vibrations of the engine.
If th e signal = 0:
- check if the sensor is well fixed
- ch eck the insulation and continuity of cabling along the circuits:
pin 20 of calculator
♦ pin 1 of detonation sensor
pin 79 of calculator
♦ pin 2 of detonation sensor
pin 19 of calculator
♦ pin 1 of detonation sensor screening.
Replace detonation sensor if necessary.
AFTER REPAIR
PA R A M E T E RADAPTATION OF ENRICHMENT WHILE RUNNING
ADAPTATION OF ENRICHMENT IN IDLE MODE
SUGGESTIONS No defect should be present or memorized.
Do initialization.
Ma
ke sure the canister draining valve is watertight.
Erase memo ry o f th e injection calculator.
With the engine hot, in the stage of the idle mode adjustment, watch these parameters and
notice:
- if one of the parameters drifts to the MAX limit, then there is no enough petrol
- if one of the parameters drifts to the MIN limit, then there is too much petrol.
Ensure the cleanness and the good functioning of:
- p etrol filter
- petr ol pump
- petrol supply circuit
- petr ol tank.
AFTER REPAIR Perform again the conformity test.
Perform again the conformity test
vnx.su

E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 64
COMMANDPETROL TANK
SUGGESTIONS No defect should be present or memorized
Check that the shock sensor has the inner contact shut.
Push in order to perform the closing of the shock sensor, if necessary.
Check, while the injection calculator commands the petrol pump, the presence of 12V at
pin 3 of the shock sensor.
If there is no 12V at pin 3 of the sensor, then remedy the circuit between pin 3 of sensor
and pole 5 of petrol pump relay.
Check the continuity between pin 1 and pin 3 of shock sensor.
If necessary, replac e shock sensor.
Check the integrity of the cabling and the presence of mass at pin A1 of the connector on
the cap of the petrol tank.
Check the insulation and the continuity of the cabling along the supply circuit +12V:
-pin 1 shock sensor
♦ pin B1 pe trol tank connector.
Remedy if necessary.
If the incident persists, replace petrol pump.
AFTER REPAIR Perform again the conformity test
DIAG NOSING-INTERPRETING THE STATES
vnx.su