2004 DACIA SUPERNOVA tow

E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 21
DIAG
NOSING-INTERPRETING THE DEFECTS
CIRCUIT OF COMMAND ACTUATOR RELAY
1. Circuit of command or short-circuit to the mass of the circuit to-
wards pin 39 of the calculator
2.
Short-circ uit a t 12V a long the c irc uit tow a rds p in 39 of the c a lc ula tor
4.
SUGGESTIONSConditions of breakdown detection by the calculator:
-tak e the contact and wait till dialogue with the tester is lost
-put th e contact and enter dialogue.
Condition of performing the diagnosing:
-defec t is present.
REMARK : This defect has priority and should be dealt with be-
fore the following ones.
Check the state of the battery and the connections to the mass.
Remedy if necessary.
Check the connecting and the state of the connector of 238 relay.
Change the connector if necessary.
Check the presence of +12V at the pole 1 of 238 relay.
Remedy the circuit to fuse S
1 in the engine compartment.
Check the coil of the 238 actuator relay.
Change relay if necessary.
Connect the 90-way terminal-tester instead of the calculator and check the insulation and
the continuity along the circuit:
pin 39 of calculator
♦ pole 2 of actu ato r r elay 2 38.
Remedy if necessary.
The proble m is not yet solved! Consequently, the injection calculator must be changed.
CAUTION! The destruction of the calculator has probably been caused by an electric shock.
The cause of the destruction must be found before mounting a new
calcul ator.
AFTER REPAIR Er
ase defects memorized by the computer.
Perform the steps under “Suggestions” to confirm the repair.
Remedy other possible defects.
DEFECT
PR ESENT
vnx.su

E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 22
DIAG
NOSING-INTERPRETING THE DEFECTS
CIRCUIT OF COMMAND PETROL PUMP
1. Open circuit or short-circuit to the mass of the circuit towards pin 68 of the c alculator
2. Short-circuit at 12V along the circuit towards pin 68 of the calculatorDEFECT
PRESENT
SUGGESTIONS
Conditions of breakdown detection by the calculator:
-tak e the contact and wait till dialogue with the tester is lost
-put the contact and enter dialogue.
Condition of performing the diagnosing:
-defec t is present.
REMARK : This defect has priority and should be dealt with before
the following ones.
Check the connection and the state of the 236 petrol pump connector.
Change connector if necessary.
Check, after setting the contact, the presence of +12V at the pole 1 of 236 petrol pump.
Remedy if necessary.
Connect the 90-way terminal-tester instead of the calculator and check the insulation
and the co ntinuity along the circuit:
pin 68 of calculator
♦ pole 2 of the 236 petrol pump.
Remedy if necessary.
Check the coil of the 236 petrol pump.
Remedy if necessary.
The prob lem is not yet solved! Consequently, the injection calculator must be changed.
CAUTION! The destruction of the calculator has probably been caused by an
electric shock.
The cause of the destruction must be found before mounting a new
calculator.
AFTER
R EPAIREr ase defects memorized by the computer.
Perform the steps under “Suggestions” to confirm the repair.
Remedy other possible defects.
5.
vnx.su

E7J-A-2/60 ENGINE17
IGNITION AND INJECTION
17 - 37
DIAG
NOSING-INTERPRETING THE DEFECTS
DEFECT
PRESENTOR
MEMORI ZEDOXYGEN PROBE CIRCUIT
Breakdown of oxygen probe signal
Conditions of breakdown detection by the calculator:
-se t the contact
-start the engine and wait for the enrichment adjustment to be
active for at least 5 minutes.
Conditions of performing the diagnosing:
-defec t is present

-t he de fe ct ha s bee n memoriz ed but is recorded in the “present” stat e .
SUGGESTIONS
Check the connection and the condition of the oxygen probe
Change the connector if necessary.
Check if there is any “false air” caused by cases of lack of watertightness along the
exhau st-probe circuit.
If the ca r has been running a lot out of town proceed to probe-cleaning
Check, after setting the contact, the presence of +12 V 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 calculator
♦ pin C of ox ygen probe
pin 80 of calculator
♦ pin D of oxygen probe.
Remedy if necessary.
Change the oxygen probe if the incident persists
Th e pr ob lem is not yet solved! Consequently, the injection calculator must be changed.
CAUTION! The destruction of the calculator has probably been caused by an electric shock.
The cause of the destruction must be found before mounting a new
calcul ator.
Er ase defects memorized by the computer.
Perform the steps under “Suggestions” to confirm the repair.
Remedy other possible defects.
AFTER REPA IR
21.
vnx.su

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
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

19 - 14
19
COOLING - EX HA U ST - FU EL TANK
DISMOUNTING - REMOUNTING EXHAUST
The catalytic converter, when in operation, reaches high tempera-
tures, and consequently m ust not co me in touch with flammable materials, which
would lead to self-combustion. The catalytic converter will be kept out of mechanic shocks.
D
IS M O UNT ING
In order to take apart t he noise-damper system 1, the following opera tions a re to be
performed: The screw-nuts 2 of the fixing collar, between holder 3 and noise-damper 1, are
loosened; The two elastic fixing stands of the damper are taken apart , at the back on the car
bodywork; The noise-da mper system is pulled and taken out.
In order to take apart the assembled holder 4, the following operations are to be performed:
Collar 4 is taken off and the assembled holder is disconnected from the catalytic
converter;
The elastic stands of the assembled holder are taken off;
The scre w-nuts of the fixing collar 2 are loosened and t he a ssembled holder is
taken out by gently rot ating, and pulling it towards the front.
In order to take apart the catalytic convert er system 6, the following opera tions are to
be performed:
The engine shield is taken apart ;
The two screw-nuts 7 for the fixation of the engine shield on the two stud-bolts on
the exhaust gallery flange;
The fixing screws of converter stand 5 are taken off;
The oxygen probe is taken apart;
Collar 4 is taken apart, and t he c atalytic converter assembled on the assembled
holder is disconnected; The catalytic convert er is taken out.
R
EMONTARE
The mounting opera tions are performed in the re verse order.
Make sure there perfect watertightness between the elements of the exhaust system,
by using the Wurth watert ightening paste, along the (i nner part of the) joining stretch,
between the gas expansion chamber and the catalytic convert er ( 0.014 kg), and between
the noise-da mper a nd the expansion chamber ( 0.013 kg);
The fittings of the oxygen probe will be replaced for each taking-apart operation;
The tightening couple between the damper and the holder: 3.5 daNm +/-0.5.
vnx.su

19 - 17
19
COOLING - EXHA U ST - FUEL TANK
The fuel tank has a watertight stopper; the inlet for the fi lling with unleaded fuel has a
filling orifice incompatible with a classical filling gun (as lead has a negative effect on the
anti-pol lution system, the oxygen probe and the catalyst).
THE ANTI - TILT VA L V E
In case the car is tilted / overthrown, the valve gets blocked, thus avoiding petrol from spilling
towards the carbon canister or the filling inlet.
T
HE SECURITY VALV E
In case the petrol vapour recycling circuit is stopped up, the security valve avoids over-pres-
sure or under-pressure in the tank. It is mounted with the red-marked end towards the joining tube “T”, and with the white-marked
en d towards the tube linking it to the filling inlet.
TANK FU EL DESCRIPTION
vnx.su