ESP RENAULT MEGANE SCENIC 1995 Service Repair Manual

FUEL MIXTURE
Specifications
12
DESCRIPTION MAKE/TYPE SPECIAL NOTES
ComputerSIEMENS FENIX 555 tracks
Injection Sequential regulated multipoint injection
Ignition Static with two dual output coils
Power module integral in computer
One pinking sensor
Plugs
EYQUEM C 52 LS
CHAMPION N7YCX
BOSCH W7DCOGap: 0.9 mm
Tightening torque: 2.5 to 3 daN.m
Air filter Replace every other oil change
Fuel filter Mounted in front of the fuel tank under the vehicle
Replace at major service
Fuel pump
WALBROSubmerged in fuel tank
Flow: 80 litres/hour minimum for regulated
pressure of 3 bars and voltage of 12 V
Pressure regulator WEBER
BOSCHRegulated pressure
Zero vacuum: 3 ± 0.2 bars
Vacuum of 500 mbar : 2.5 ± 0.2 bars
Solenoid injector
SIEMENSVoltage: 12 V
Resistance: 14.5 ± 1 Ω
Throttle body SOLEX
Diameter 60 mmReference: 127 F3R 751 without AC - F3R 750
Reference: 132 F3R 751 AC
Idle speed regulation solenoid
HITACHI
AESP 207-17Voltage: 12 V
Resistance: 9.5 ± 1 Ω
Fuel vapour recirculation
canister
Solenoid valve
CAN 10
DELCO REMY
Voltage: 12 V
Resistance: 35 ± 5 Ω
Heated oxygen sensor
BOSCH LSH 25Voltage at 850°C
Rich mixture: > 625 mvolt
Lean mixture: 0 to 80 mvolt
Tightening torque: 4.5 daN.m
Fault finding
FICHE n° 27
CODE D13
SELECTOR ON S8
Throttle potentiometer
Idle speed regulation: 8 ≤ #17 ≤ 38
Full load: 188 ≤ #17 ≤ 245
R.C.O. idle speed: 20 % ≤ #12 ≤ 40 % (F3R 750)
18 % ≤ #12 ≤ 38 % (F3R 751)
Adaptive R.C.O
idle speed: - 6.2 % or - 8.6 ≤ #21 ≤ + 6.2 %
Adaptive richness
operation: 82 ≤ #30 ≤ 224
Adaptive richness idle speed: 32 ≤ #31 ≤ 224
12-6

PUMP
Mechanical power assisted steering pump
13
F8Q engine
with AC
SPECIAL TOOLING REQUIRED
Mot. 453-01 Hose clamp pliers
REMOVAL
Remove the belt (see corresponding section).
Fit clamp Mot. 453-01 to the supply pipe.
Remove:
- the pulley (three bolts),
- the wiring mounting and the high pressure
pipe by removing bolt (2),
99171R
99170R
REFITTING
Refitting is the reverse of removal.
99174-1R
- the supply pipe and the high pressure pipe,
- the three pump mounting bolts.
Remove the pump.
13-44

PUMP
Mechanical power assisted steering pump
13
F3R engine
with AC
SPECIAL TOOLING REQUIRED
Mot. 453-01 Hose clamp pliers
REMOVAL
Remove the belt (see corresponding section).
Fit clamp Mot. 453-01 to the supply pipe.
Remove:
- the pulley (three bolts),
- the wiring mounting,
- the supply pipe and the high pressure pipe,
99058S
- the three pump mounting bolts.
99502R
REFITTING
Refitting is the reverse of removal.
99502-1R1
Remove the pump.
13-45

STARTING - CHARGING
Alternator
16
OPTIMA 5800 diagnostic station
CHECKING THE CHARGING CIRCUIT USING THE DIAGNOSTIC STATION
The OPTIMA 5800 diagnostic station is used to test the alternator by measuring the voltage and current flow,
with and without electrical consumers.
NOTE : the ampermetric clamp on the station is of the inductive type (measuring range : 0 to 1000 A). It may
be positioned without disconnecting the battery, whichallows computers to retain their memory and set-
tings.
Depending on the engine, the ampermetric clamp may be positioned in different locations (the diagnostic
station will detect incorrect positioning) :
- F3R, F8Q engines : directly at the alternator output, the arrow on the clamp pointing towards the alterna-
tor.
- E7J, K7M engines : on the cable connecting the positive battery terminal to the alternator (this cable
crosses the battery compartment partition).
Measurements are made in three stages:
- measurement of battery voltage, ignition off,
- measurement with no consumers of the regulated voltage and current flow,
- measurement with the maximum number of consumers of the regulated voltage and current flow.
At the end of the test, the values noted will form the basis of a diagnostic report message:
- Battery voltage no load < 12.3 V = battery discharged.
Without consumers:
- Regulated voltage > 14.8 V = > regulator faulty,
- (Regulated voltage no load < 13.2 V) or (charging current < 2 A = > charging fault).
With consumers:
- Regulated voltage > 14.8 V = > regulator faulty,
- Regulated voltage < 12.7 V = > check the alternator flow with reference to its specifications:
Engine E7J K7M F3R F8Q
Without air conditioning 75 (45) 75 (50) 75 (50) 75 (50)
With air conditioning / 110 (80) 110 (80) 110 (80)
Notes for the table: - Current values in Amps.
- The value in brackets corresponds to the minimum flow which should be
supplied by the alternator when all consumers are connected.
FAULT FINDING
SPECIAL TOOLING REQUIRED
16-7

EXHAUST
General
19
EXHAUST PIPE MOUNTINGS UNDER THE BODY
The exhaust pipe is attached under the body using
rubber mountings.
These may generally be released by hand by lif-
ting the exhaust pipe.
In certain cases however, the retaining bolts for
mounting (A) under the body may have to be
slackened to release the rubber mountings more
easily. The catalytic converter reaches high temperatures
during operation and consequently the vehicle
should never be parked in an area where there is
combustible material which could come into
contact with the exhaust and pose a fire risk.
Under certain conditions, this type of material
could catch fire.
IMPORTANT:
- sealing between the exhaust manifold gasket
face and the catalytic converter must be per-
fect,
- any seals removed
MUST be renewed (especial-
ly at the catalytic converter flange),
- during removal and refitting the catalytic
converter should not be subjected to repeated
mechanical impacts as it may be damaged.
CUTTING THE EXHAUST PIPE
The exhaust pipes are of monoblock construction.
This means there is no break between the inlet to
the catalytic converter or the expansion chamber
and the silencer outlet.
If one of the components requires replacement as
an After Sales operation, the exhaust pipe must
be cut.
To do this:
- mark up the cutting line correctly,
- use the cutting tool Mot. 1199,
- fit the After Sales sleeve.
99225R
19-12

MANUAL GEARBOX
Gearbox (Removal - Refitting)
21
Position the driveshaft with respect to the sun-
wheel, pivot the stub-axle carrier and engage the
driveshaft into the sunwheel using the shouldered
pin B.Vi. 31-01 in order to align the holes.IMPORTANT
Fit the bolt (V) and the starter motor centring do-
wel (D) correctly :
E and K engines
A chamfer on the leading edge of the sunwheel
makes it easier to fit new roll pins.
Seal the ends
(RHODORSEAL 5661).
Fill with fluids.
Fit the caliper mounting bolts with Loctite
FRENBLOC and tighten to the correct torque.
Press the brake pedal several times to bring the
pistons back into contact with the brake pads. E and K
engines
86070R3
Reconnect the speedo cable, ensuring that the clip
is the correct way round.
92108-1S
74937-4S
Tighten all nuts and bolts to the recommended
torques.
Fill the gearbox with oil.
21-12

MANUAL GEARBOX
Gearbox (Removal - Refitting)
21
Position the driveshaft with respect to the sun-
wheel, pivot the stub-axle carrier, engaging the
driveshaft into the sunwheel using the shouldered
pin B.Vi. 31-01 in order to align the holes. F engine
A chamfer on the leading edge of the sunwheel
facilitates makes it easier to fit new roll pins.
Seal the ends
(RHODORSEAL 5661).
Fill with fluids.
Fit the caliper mounting bolts with Loctite
FRENBLOC and tighten to the correct torque.
Press the brake pedal several times to bring the
pistons back into contact with the brake pads. F
engine
86070-1R1
Check the adjustments of the upper mountings
(refer to chapter 10).
Ensure that the movement limiter is mounted the
correct way round: the nuts should be fitted on
the exhaust pipe side.
92661S
74937-4S
Tighten all nuts and bolts to the recommended
torques.
Fill the gearbox with oil.
21-18

MANUAL GEARBOX
Differential output seal
Continue in the same way but using tool B.Vi.
1058 and protector (A) of B.Vi. 945.
21
Fit new roll pins and seal the ends with
RHODORSEAL 5661 (Eg. CAF 4/60 THIXO).
Tighten the nuts and bolts to the recommended
torques.
Refit the brake caliper and coat the bolts with
Loctite FRENBLOC.
Fill the gearbox with oil.
Fit the O-ring to the sunwheel and coat the splines
with grease N° 20.
Position the driveshaft with respect to the sun-
wheel.
Pivot the stub-axle carrier, engaging the drives-
haft into the sunwheel using pin B.Vi. 31-01 to
align the holes.
92111R
74937-3S
21-25

MANUAL GEARBOX
Speedometer drive gear
REPLACEMENT
1st case :
Only the speedo gear or the pin is damaged.
REMOVAL
The gearbox does not have to be completely dis-
mantled.
Release the left hand driveshaft.
Remove the sunwheel spider.
Rotate the differential by hand so that the speedo
gear is accessible.
Unclip the pin by pulling it vertically using a pair
of long nose pliers.
Using these pliers, remove the gear from its hou-
sing.
REFITTING
Refit a new speedo gear using a pair of flat nose
pliers.
The gear and its pin should be refitted by hand.
The pin must be correctly positioned with respect
to the key lugs on the gear due to the elasticity of
the lips of the pin.
21
Ensure that it is correctly clipped in.
Refit the sunwheel spider.
2nd case :
The speedo gear and crown wheel are damaged
The gearbox has to be removed and the final drive
has to be dismantled.
88577S
86053S
Correct Incorrect
21-26

AUTOMATIC TRANSMISSION
Automatic transmission (Removal - Refitting)
23
K7M
ENGINE
Separate the gearbox from the engine by :
- removing the starter motor,
- removing the bolts from the automatic trans-
mission sump.
Remove:
- the hoses on the exchanger, Lift the engine from the sub-frame.
91131S
- the converter bolts
- the bolts around the gearbox and the TDC sen-
sor.
Separate the automatic transmission from the en-
gine.
REFITTING (special notes)
Refit the converter by positioning it with respect
to the mounting bolts.
Tighten the bolts around the automatic transmis-
sion.
Refitting is the reverse of removal.
Aligning the engine sub-frame with the body will
be made easier by positioning two approximately
100 mmlong threaded rods in the two front sub-
frame-body mountings.
Tighten the sub-frame front mounting bolts to a
torque of 6 daN.m. and to a torque of 11 daN.m at
the rear.
Tighten all nuts and bolts to the re-
commended torque.
Fit the caliper mounting bolts using Loctite
FRENBLOC and tighten them to the correct tor-
que.
Press the brake pedal several times to bring the
pistons back into contact with the brake pads.
Fill:
- the cooling circuit and purge it (see chapter 19),
- the engine with oil if necessary.
NOTE : check that the steering shaft yoke spacer is
in place when refitting.
99586R2
23-19