2004 DACIA SUPERNOVA Repair Manual

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
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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
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 65
DIAG
NOSING-INTERPRETING THE STATES
LOW SPEED VENTILATOR
HIGH SPEED VENTILATOR
No defect should be present or memorized
CO
MMAND
SUGGESTIONS
Check the insulation and the continuity of the cabling along the
circu it to pin 8 of calculator.
Remedy if necessary.
If the incident persists, check on the basis of the electrical schema:
- the supply of the ventilator (700) and of the GMV ventilator
- the connection to the mass of the GMV ventilator
- th e state of the GMV (700) relay
- the state of the fuse (321) located between the relay 700 and the
GMV ventilator
- the state of the GMV ventilator.
Remedy if necessary.
Th
e ventilator does
not turn at low speed
The ventilator does
not turn at high speedCheck the insulation and the continuity of the cabling along the
circu it to pin 38 of calculator.
Remedy if necessary.
If the incident persists, check on the basis of the electrical schema:
-t he supply of the ventilator (234) and of the GMV ventilator
-t he connection to the mass of the GMV ventilator
-the state of the GMV (234) relay
-t he state of the GMV ventilator.
Remedy if necessary.
AFTER REPAIR Perform again the conformity test.
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 66
DIAG
NOSING-BREAKDOWN LOCALIZATION ALGORITHM
STARTING PROBLEMS
1.
Do not use this information before having done the complete check-up
with the tester!
SUGGESTIONS
♦♦
♦♦
Check if there is petrol in the fuel tank (do not rely on the
on-board in
dices). Check if it is the fuel recommended by
the manufacturer.
Disconnect the tube between the draining valve and the
intake collector and strangle it up. If the disturbances disap-
pear, the cause was the draining valve.
Connect the “CLIP TEHNIC” device to do this test in ac-
cordance with the usual manner of work.
Connect the tester “CLIP” and do the test corresponding to
the check-up of the rotation signal.
Gently touch the step-by-step engine in order to possibly
unbloc k it.
Check the fuel
Check the canister
draining valve♦♦♦♦
Check the engine
co
mp ression
Check the
engine flywheel
Check the step-by-
step engine
♦♦ ♦♦
♦
♦
Check if there are no broken tubes.
Check the state of the sparking plugs and the ignition coil.
Check the tubes and
hoses
♦♦♦♦
Check the ignition♦♦♦♦
Check the flow and the pressure of the fuel: the condition
of
the petrol-pump, of the pressure regulator. Check the
injectors (flow, shape of jet)
Check if the exhaust circuit is not strangled-up and the
cata lyst is not stopped-up.
Check the fuel-
supply circuit
♦♦♦♦
Check the exhaust
system
♦♦♦♦
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 67
DIAG
NOSING-BREAKDOWN LOCALIZATION ALGORITHM
IDLE MODE PROBLEMS
Do not use this information before having done the complete check-
up w ith the tester!2.
SUGGESTIONS
Check if there is petrol in the fuel tank (do not rely on the
on-board indi ces). Check if it is the fuel recommended by
the manufa cturer.
Check the fuel

Check if there are no broken tubes.
Check the tubes and hose
s.
♦
♦
Check the state of the sparking plugs and the ignition coil.
Check, on the o il ga uge , if the le ve l of the oil is not too h igh.
Connect the tester “CLIP” and do the test corresponding
to the check-up of the rotation signal.
Gently touch the step-by-step engine in order to possibly
unblock it.
Check the condition of the fittings.
Check, after taking them apart, whether the injectors leak.
Check if the clapper body is not clogged.
Check the ignition
Check the engine oil level
Ch eck the step-by-step engine
Check the intake collector
Check the injectors
Ch eck the body of the clapper
♦
♦
Check the engine flywheel♦
♦
♦
♦
♦
Check the flow and the pressure of the fuel: the condition
of the pe trol-pump, of the pressure regulator. Check the
injectors (flow, shape of jet)
Check if the exhaust circuit is not strangled-up and the
cata lyst is not stopped-up.
Check the fuel-supply
circuit
Check the exhaust system
♦
♦
A
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 68
DIAG
NOSING-BREAKDOWN LOCALIZATION ALGORITHM
A
Check if there are cases of lack of watertightness (noise)
on the powe r-brakes.
Connect the “CLIP TEHNIC” device to do this test in
accordance with the usual manner of work.
Disconnect the tube between the draining valve and the
intake collector and strangle it up. If the disturbances
d isappear, the cause was the draining valve.
AFTER REPAIR Erase the def
ects memorized. If there are no other problems,
eras e the parameters memorized by the calculator.
Check the powe r -br a kes
Ch eck t h e engine compression
♦
♦
Check the canister
draining valve♦
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 69
DIAG
NOSING-BREAKDOWN LOCALIZATION ALGORITHM
RUNNING PROBLEMS3.
SUGGESTIONSDo not use this information before having done the complete
check- up with the tester!
Check if there are no broken tubes
Check if the air filter is not deformed.
Check the condition of the fittings.
Check if the exhaust collector is watertight.
Make sure that, after taking them off, the injectors do not leak.
♦
♦
♦
Check if there are no broken tubes
Check the state of the sparking plugs and the ignition coil.
Check if there is petrol in the fuel tank (do not rely on the
on-board in dices). Check if it is the fuel recommended by
the manufa cturer. Check if there are no broken tubes.
Check if the exhaust circuit is not strangled-up and the
cata lyst is not stopped-up.Check the exhaust
system
♦♦
♦ ♦
♦ ♦ ♦Check, on the oil gauge, if the level of the oil is not too high.
Check the air filter
Ch eck the fuel
Check the tube s a nd
hose s.
Check the fuel-sup-
ply circuit
Check the ignition Check the engine oil
levelCheck the intake
collector
Check the exhaust
collector
Check the injectors
A
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E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 70
DIAG
NOSING-BREAKDOWN LOCALIZATION ALGORITHM
Check if the clapper body is not clogged.
Check if there are cases of lack of watertightness (noise)
on the powe r-brakes.
Connect the tester “CLIP” and do the test corresponding
to the check-up of the rotation signal.
Check if the spurs, the brake cylinders and the wheel ball-
rings are no t seized-up.Check the body o f
the clapper♦
Ch eck t he power-br akes
Check the engine
flywheel
Check the running
train
Check the cooling
of the engine
♦
♦
♦
Check if there is enough engine cooling.♦
Check the canister
draining valve Disconnect the tube between the draining valve and the in-
take collector and strangle it up. If the disturbances disap-
pear, the caus
e was the draining valve.
Check the engine
comp ression Connect the “CLIP TEHNIC” device to do this test in accor-
dance w ith the usual manner of work.
AFTER REPAIR Erase the defec
ts memorized. If there are no other problems,
eras e the parameters memorized by the calculator.
♦
♦
A
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