tow DACIA SUPERNOVA 2004 User Guide

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.
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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 - 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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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.
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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
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20
CLUTCH
The clutch disc is mounted with the A damping flange towards the gearbox
The clutch d isc is centered with the AMB 1518 centering device
The clutch mech anism is mounted;
Th e fixing screws are progressively put on the thread of the mechanism, then they are tight-
ened to the couple;
The MOT 582 fly wheel-stopping sector is taken off.
CLUTCH DISC MECHANISM
20 - 10
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CV JH3 - 05021
MANUAL GEARBOX
21 - 13
In order to recover t he balls and t he locking
s prings of the shafts, two magnets placed in the
C orifices are used.
Pull the control shaft towards exterior.
The crankcases are separated.
Rotate to the left the shaft – reverse driving
pinion assembly and dismount the control reverse
driving shaft velocity 5-th step. T
ake out the fork pin 3-4 by means of the
C.V. 949 device and dismount the a xle and
3-4 fork assembly. Simultaneously, dismount the primary shaft
and secondary shaft assembly with the axle
and 1-2 fork.
Place vertically the secondary shaft, with
the pinion of the 1 step downwards, so that
the other pinions will not fall. Recover the locking pi ns ( A) and ( B) of
the command axles.
GEARBOX DISMOUNTING
Easy lift the primary shaft and di smount the
shaft and reverse driving pinion assembly .
C.V. 1170
C.V. 94 9
A
B
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CV JH3 - 05021
MANUAL GEARBOX
21 - 15
BEARING DISMOUNTING OF THE MECHANISMS
CRANKCASE
The safety ring of the bearing (t he hol ding ri ng) i s widened by means of a pa ir of safety
pincers, then the bearing is extracted from the crankcase by hammering towards the inside of the
mechanisms crankcase, by means of the C.V. 551 device.
BEARING REMOUNTING OF THE MECHANISMS CRANKCASE
Replace the safety of the bearings with a new one, then it is introduced into its groove in the
mechanisms crankcase, so that i t keeps its position as c ompared t o the crankcase (the safety
shows a shoulder).
The bearing lying a t the outside of the c rankcase of the mechanism is pressed towards the
inside of it, until the safety fits into the groove carved on the outer ring of the bearing.
Mounting the bearing is performed by means of the C.V. 551 device.
C.V. 551
GEARBOX DISMOUNTING
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CV JH3 - 05021
MANUAL GEARBOX
21 - 16
The roll bearing i n the c rankcase i s dismounted in t he opposite di rection to the clutch, by
means of the C.V. 553 device.
Ensure that device is well fixed upon depressing the bearing.
BEARING REMOUNTING FROM TH E CLUTCH – DIFFERENTIAL CRANK-
CASE
The remounting shall be performed using the same C.V. 553 device, the mounting directions
of the bearing being towards the clutch. BEARING DISMOUNTING FROM THE CLUTCH – DIFFERENTIAL CRANK-
CASE
C.V. 553
GEARBOX DISMOUNTING
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