1995 RENAULT MEGANE SCENIC reset

VALUES AND SETTINGS
Belt tension
07
96601R
SPECIAL TOOLING REQUIRED
Mot. 1273 Tool for checking belt tension
A Sensor
B Display
C Connecting lead
D Calibration checking plate
Principle
The sensor, through the adjusting button (1), the
pressure device (2) and the outer lugs (3), applies a
constant force to the belt.
The reaction from the belt is measured using a
test piece (4) fitted with strain gauges.
Any movement on the gauges creates a variation
in their electrical resistance. This variation, once it
has been converted by the device, is displayed on
the display in SEEM units (US).Calibrating the device
The device is set in the factory, however it must be
recalibrated every six months.
Procedure
Resetting zero:
- switch the device on (button E) with the adjus-
ting button (1) fully screwed in,
- if 0 is displayed, do not touch anything,
- if nothing is displayed, check the condition of
the 9 volt battery in the device ,
- if a value other than 0 is displayed, adjust screw
(F) until 0 is displayed.
07-5

FUEL SUPPLY
Fuel cut-out on impact
13
AIM
The aim of this function is to avoid a fire after an
accident due to a fuel leak. To accomplish this, all
components which pump fuel from the fuel tank
are stopped during and after the impact. They
may only be started again by a mechanical action
performed by the driver or repair mechanic.
DESCRIPTION
The system comprises an inertia switch which may
be reset, which:
- detects the impact (1),
- cuts the electrical circuit.
99511R
It is mounted:
• For petrol engines, between track 1 of the
pump relay (236) and the + feed.• For diesel engines, between the + feed and
the fuel shut off (or the coded solenoid valve
if the vehicle is fitted with an engine
immobiliser).
OPERATION
During the impact, the inertia switch ball leaves its
seat and breaks the electrical current.
For petrol engines, the + feed to the pump relay
control circuit (236) is cut. The pump and the
injectors are thus no longer fed electrically.
The fuel in the fuel tank is therefore isolated.
For diesel engines, the + feed to the fuel shut off
or the coded solenoid valve is cut.
The pump can no longer take up fuel, there is no
high pressure any more. Any risk of fire due to
high pressure diesel spray over the engine is
removed.
RESETTING THE SWITCH AND SWITCH
OPERATION
To reset the inertia switch, press the top to
reposition the ball in its seat.
IMPORTANT:
• for petrol engines, after resetting the switch,
the computer memory
MUST be erased using
the XR25. The injection computer will
memorise a pump relay fault when the system
is triggered.
• for diesel engines, after resetting the switch,
the passenger compartment connection unit
memory
MUST be erased using the XR25. This
unit will memorise a break in feed to the
coded solenoid valve.
13-1

INJECTION
Idle speed adaptive correction
17
PRINCIPLE ( K7M and F3R engines)
The E7J engine has no idle speed adaptive correction and no #12 function.
Under normal warm engine operating conditions, the RCO idle speed value using #12 varies between an up-
per and a lower value to obtain the nominal idle speed.
If the engine operating conditions are different (running in, engine contaminated...) the RCO idle speed va-
lue may be situated close to the upper or lower value.
Adaptive correction (#21) for the RCO idle speed (#12) allows compensation to be made for slow variations
in the engine’s air requirements, in order to recentre the RCO value (#12) to a nominal average value.
This correction is only operational if the coolant temperature is greater than 80°C, 20 seconds after starting
the engine and if the engine is in the nominal idle speed regulation phase.
RCO IDLE SPEED VALUES AND ADAPTIVE CORRECTION
Engine
F3R 750Engine
F3R 751Engine
K7M 702Engine
K7M 703Engine
K7M 720
Nominal idle
speed (#06)X = 770 rpm. X = 770 rpm. X = 720 rpm.X = 750 rpm.
in P and NX = 720 rpm.
R.C.O. idle speed
(#12)20 %≤X≤40 % 18 %≤X≤38 % 6 %≤X≤15 %10 %≤X≤20 %
in D
6 %≤X≤15 %
in P and N4 %≤X≤14 %
Adaptive idle
speed
(#21)Threshold:
- min : - 8.6 %
- max : +6.2 %Threshold:
- min : - 8.6 %
- max : +6.2 %Threshold:
- min : - 2.4 %
- max : +6.2 %Threshold:
- min : - 2.4 %
- max : +6.2 %Threshold:
- min : - 2.4 %
- max : +6.2 %
INTERPRETATION OF THE GATE VALUES
If there is an excess of air (air leak, throttle stop incorrectly set...) the idle speed increases, the RCO idle speed
value for #12 decreases to return to the nominal idle speed; the RCO idle speed adaptive correction value for
#21 reduces to recentre the RCO idle speed for #12.
If there is a lack of air (pollution, etc.), the strategy is reversed:
The RCO idle speed for #12 increases and adaptive correction for #21 also increases, in order to recentre #12
to a nominal average value.
IMPORTANT : after erasing the computer memory (disconnecting the battery), the engine must be allowed to
run at idle speed before returning the vehicle to the customer so that the adaptive correction may correctly
reset itself. Minimum threshold for the F3R engine 750 (- 8.6 %) : this value is taken from the definitive setting. The first
versions to be marketed have a threshold of - 6.2 %.
17-33

CLUTCH
Thrust pad Fork
20
After the gearbox has been refitted, position the
cable on the clutch fork, reset the toothed sector
and check that the play compensation device
works.
Check the clutch travel.
The fork travel should be:
X = 27.4 to 30.7 mm
97758-1R
20-15