1995 RENAULT MEGANE SCENIC engine

93703S
This test is only possible using the Nauder lead test kit.
To obtain a test kit, contact your After Sales Head Office.
Part numbers: - For the complete kit: T900
- For a set of 40 test papers : T 900/1
ANTIPOLLUTION
Test for the presence of lead
14
METHOD
Detecting lead at the exhaust
a- Conditions for the test:
- Engine not running
- Exhaust pipe warm but not burning.
- Do not perform the test if the temperature is below 0 °C.
b- If necessary, use a dry cloth to clean the inside of the exhaust pipe to remove soot deposits.
c- Wearing the gloves, moisten a test paper slightly with distilled water (if the paper becomes too wet, it
will lose its efficiency).
d- Apply the moistened test paper to the cleaned section of the exhaust pipe and hold it there with
slight pressure for approximately one minute.
e- Remove the test paper and leave it to dry. If lead is present, the paper will be a red or pinkish colour.
ATTENTION :The test for lead should be carried out on the exhaust tail pipe. It should never be carried out
on the oxygen sensor.
Petrol engine
14-22

CHECKING
After 15 minutes warming up with a voltage of13.5 volts.
STARTING - CHARGING
Alternator
16
IDENTIFICATION
ENGINE ALTERNATOR CURRENT
F3R
F8QValéo A 11 VI - 59
Valéo A 13 VI 4575 A
110 A
F3R CA
F8Q CAValéo A 13 VI - 57 110 A
K7MValéo A 11 VI - 61
Valéo A 13 VI 10575 A
110 A
E7J
Valéo A 13 VI 104
Valéo A 13 VI 10580 A
110 A
engine rpm 75 apms 80 apms 110 apms
1000
2000
3000
400046
68
71
7254
75
80
8257
94
105
108
16-1

STARTING - CHARGING
Alternator
16
OPERATION - FAULT FINDING
These vehicles are fitted with alternators with in-
ternal ventilation, an integral regulator and a
warning light on the instrument panel which ope-
rates as follows :
- when the ignition is turned on, the warning
light illuminates,
- when the engine starts, the warning light ex-
tinguishes,
- if the warning light illuminates again when
the engine is running, there is a "charging"
fault.
LOOKING FOR FAULTS
The warning light does not illuminate when the
ignition is turned on.
Check:
- the electrical connections are correct,
- the bulb is not blown (to do this, earth the cir-
cuit; the bulb should illuminate).
The warning light illuminates when the engine is
running
There is a charging fault which could be due to:
- the alternator drive belt being broken or the
charging cable being cut,
- internal damage to the alternator (rotor, sta-
tor, diodes or brushes),
- regulator fault,
- an excess voltage.The customer complains of a charging fault and
the warning light operates correctly.
If the regulated voltage is less than 13.5 V, check
the alternator. The fault could be caused by:
- a destroyed diode,
- a cut phase,
- track contamination or wear.
Checking the voltage
Connect a voltmeter across the battery terminals
and read the battery voltage.
Start the engine and increase the engine speed
until the voltmeter needle stabilises at the
regulated voltage.
This voltage should be between 13.5 V and 14.8 V.
Connect as many consumers as possible, the
regulated voltage should remains between 13.5 V
and 14.8 V.
IMPORTANT: if arc welding is carried out on the
vehicle, the battery and the regulator must be
disconnected.
16-2

STARTING - CHARGING
Alternator
16
- the alternator drive belt, together with bolt (3)
and shaft (4), removing through opening (5),
REMOVAL
With the vehicle on a 2 post lift, disconnect:
- the battery,
- the alternator electrical connections.
Remove:
- the power assisted steering belt by slackening
the three bolts (1) and the nuts (2) for the ten-
sioner, E 7 J and
K 7 M engines
SPECIAL TOOLING REQUIRED
Mot. 1273 Tool for testing belt tension
T. Av. 476 Ball joint extractor
Upper shock absorber mounting bolt 3
Track rod end nut 3.5
Wheel bolts 9
TIGHTENING TORQUES (in daN.m)
98747R198745R2
- the front right hand wheel,
- the track rod end (6) using tool T. Av. 476,
98712R
16-3

STARTING - CHARGING
Alternator
16
- the two upper shock absorber mounting bolts
(7).
98709R1
Press downwards on the front axle assembly to
make removing the alternator easier through the
front right hand wheel arch.
REMOVAL
Refitting is the reverse of removal.
Special notes:
- do not refit the old drive belt, renew it,
- refer to section 07 for tension values. E 7 J and
K 7 M engines
16-4

STARTING - CHARGING
Alternator
16
REMOVAL
(there are no special notes for engines fitted with
power assisted steering)
To release the alternator shaft the following must
be removed:
- the mounting bolts (1) for the coils,
- the two bolts (2) from the coil mounting.
Slacken bolt (3) then slide the mounting down.
98899R1
REFITTING
Refitting is the reverse of removal. F 3 R engine
16-5

STARTING - CHARGING
Alternator
16
REMOVAL
Disconnect:
- the battery,
- the alternator electrical connections.
Remove the mounting bolt for the diesel fuel pipe
retaining bracket and move it to one side.
98837R
Slacken bolt (A) then bolt (B), to just past the
shoulder, while holding the automatic tensioner
plate with a 9 mm wrench (Eg. : FACOM J 151 rat-
chet), then slacken the belt by moving the ratchet
in the direction of the arrow. F 8 Q engine
with AC
98837-1R
Remove:
- the lower timing cover,
- the belt,
- the alternator mounting bolts,
- the alternator.
REFITTING(Special note)
Refitting is the reverse of removal.
The belt is tensioned by moving the automatic
tensioner plate against the stop at bolt (B), wi-
thout forcing it, using a 9 mm wrench (Eg. :
FACOM J 151 ratchet ).
98837-1R1
NOTE : do not refit a belt once it has been remo-
ved.
16-6

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