engine RENAULT MEGANE 2018 Repair Manual

2.25
MAINTENANCE AND ANTIPOLLUTION ADVICE
Your vehicle complies with criteria for
recycling and recovering vehicles at the
end of their service life, which entered
into force in 2015.
Some parts of your vehicle have there-
fore been designed to facilitate future
recycling.
These parts are easy to remove so
that they can be recovered and reproc-
essed by recycling companies.
By virtue of its design, moderate fuel
consumption and initial settings, your
vehicle also conforms to current anti-
pollution regulations. The manufac-
turer is actively striving to reduce pol-
lutant exhaust gas emissions and to
save energy. But the fuel consumption
of your vehicle and the level of pollutant
exhaust gas emissions are also your
responsibility. Ensure that it is main-
tained and used correctly.
Maintenance
It is important to remember that fail-
ure to respect antipollution regulations
could lead to legal action being taken
against the vehicle owner.In addition, replacing engine, fuel
supply system and exhaust compo-
nents with parts other than those origi-
nally recommended by the manufac-
turer may alter your vehicle so that it
no longer complies with anti-pollution
regulations.
Have your vehicle adjusted and
checked by an authorised dealer, in ac-
cordance with the instructions given in
your maintenance schedule: they will
have all the equipment necessary for
ensuring that your vehicle is maintained
to its original standard.
Engine adjustments
– Spark plugs:
for optimum condi-
tions of use, output and performance
the specifications laid down by our
Design Department must be strictly
applied.
If the spark plugs have to be changed, use the make, type and gap specified
for your vehicle’s engine. Contact an
authorised dealer for this.
– Air filter, fuel filter: a choked ele-
ment will reduce efficiency. It must
be replaced.
– Ignition and idle speed: no adjust-
ment is needed.
Exhaust gas monitoring
system
The exhaust gas monitoring system will
detect any operating faults in the vehi-
cle’s antipollution system.
If this system malfunctions, toxic sub-
stances may be released into the at-
mosphere or damage may occur.
ÄThis warning light on the in-
strument panel will indicate if
there are any faults in the system:
This lights up when the ignition is
switched on and goes out when the
engine is started.
– If it lights up continuously, consult an approved Dealer as soon as possi-
ble;
– if it flashes, reduce the engine speed until the light stops flashing. Contact
an authorised dealer as soon as pos-
sible.

2.31
DRIVER CORRECTION DEVICES AND AIDS (2/10)
Operating faults:
–
© and x lit up on the in-
strument panel accompanied by the
messages “Check ABS”, “Check
braking system” and “Check ESC”:
this indicates that the ABS, the ESC
and the emergency brake assist are
disabled. Braking is always ena-
bled;
–
x, D, © and ®
lit on the instrument panel accom-
panied by the message “Braking
system fault”: this indicates a fault
with the braking system.
In both cases, consult an approved
dealer.
Your braking systems
are partially operational.
However, it is dangerous
to brake suddenly and
it is essential to stop immediately,
as soon as traffic conditions allow.
Contact an approved dealer.Warning light ® re-
quires you to stop immedi-
ately, for your own safety,
as soon as traffic conditions
allow. Switch off the engine and do
not restart it. Contact an approved
Dealer.

2.32
Electronic stability control
ESC with understeer control
and traction control
Electronic stability control ESC
This system helps you to keep control
of the vehicle in critical driving condi-
tions (avoiding an obstacle, loss of grip
on a bend, etc.).
Operating principle
A sensor in the steering wheel detects
the direction selected by the driver.
Other sensors throughout the vehicle
measure the actual direction.
The system compares driver input to
the actual trajectory of the vehicle and
corrects the trajectory if necessary by
controlling the braking of certain wheels
and/or engine power. In the event that
the system is engaged, indicator light
 flashes on the instrument panel.Understeer control
This system optimises the action of the
ESC in the case of pronounced under-
steer (loss of front axle road holding).
Traction control
This system helps to limit wheelspin of
the drive wheels and to control the ve-
hicle when pulling away accelerating or
decelerating.
Operating principle
Using the wheel sensors, the system
measures and compares the speed of
the drive wheels at all times and slows
down their over-rotation. If a wheel is
starting to slip, the system brakes au-
tomatically until the drive supplied be-
comes compatible with the level of grip
under the wheel again.
The system also adjusts the engine
speed to the grip available under the
wheels, independently of the pressure
exerted on the accelerator pedal.
Operating faults
When the system detects an operat-
ing fault the message “Check ESC” and
warning light
© and  appear
on the instrument panel.
In this case, the ESC and traction con-
trol system are deactivated. Consult an
authorised dealer.
DRIVER CORRECTION DEVICES AND AIDS (3/10)

2.36
DRIVER CORRECTION DEVICES AND AIDS (7/10)
Active emergency braking
This function is an additional driving aid. This function is not under any
circumstances intended to replace the due care and attention of the
driver, who should at all times be in control of the vehicle.
System servicing/repairs
– In the event of an impact, the sensor alignment may become changed, and \
its operation will consequently be affected. Deactivate the function, then consult
an authorised dealer.
– Any work in the area where the radar is located (repairs, replacements,\
touch- ing up of paintwork) must be carried out by a qualified professional.
Only an authorised dealer is qualified to service the system.
In the event of system disturbance
Some conditions can disturb or damage the operation of the system, such \
as:
– a complex environment (metal bridge, etc.);
– poor weather conditions (snow, hail, black ice, etc.).
Risk of inadvertent braking.
Operating faults
When the system detects an operating
fault, the
\b warning light lights up
on the instrument panel, with the mes-
sage “Active braking disconnected”.
There are two possibilities:
– The system is temporarily experienc- ing difficulties (for example: sensor
obscured by dirt, mud, snow etc.);
in this case, park the vehicle and
switch off the engine. Clean the de-
tection zone of the radar. When you
next start the engine, the warning
light and the message go out;
– If this is not the case, this may arise from another cause; contact an
Approved Dealer.

2.44
Activation/deactivation
Vehicles fitted with a navigation
system
From the multimedia screen 2, select
the “Vehicle” menu, “Driving assist-
ance”, “Blind spot alert” then choose
“ON" or "OFF".
You can access menu “Driving as-
sistance” directly from button 3
.
Vehicles not fitted with a navigation
system
– With the vehicle at a standstill, press
and hold the switch 4 OK to access
the settings menu;
– repeatedly press the control 5 up or
down until you reach the “Driving as-
sistance” menu. Press the switch 4
OK;
BLIND SPOT WARNING (2/4)
– repeatedly press the control 5 up or
down until you reach the Blind spot
alert menu, then press the switch 4
OK.
– Press the switch 4 OK again to acti-
vate or deactivate the function.
45
When the engine is started, the system
remembers its position when the igni-
tion was last switched off.
3
2

2.46
Operating faults
If the system detects a fault, the mes-
sage “Check blind spot alert” is dis-
played on the instrument panel. Consult
an approved dealer.
Note: when the engine is started, the
indicator light 6, display B , flashes
three times. It is normal.
– The system’s detection
range operates according
to a standard lane width. If
you are driving in wide traf-
fic lanes, the system might not
be able to detect a vehicle in the
blind spot.
– The system might be disrupted momentarily if it is exposed to
strong electromagnetic waves
(as beneath high-tension power
lines) or to very poor weather
conditions (heavy rain, snow,
etc.). Remain aware of driving
conditions.
There is a risk of accidents.
BLIND SPOT WARNING (4/4)
Because sensors have
been installed in the bump-
ers, any work (repairs, re-
placements, touching up of
paintwork) must be carried out by a
qualified professional.
6
B
C
D
Conditions for non-function
– If the object is not moving;
– if traffic is heavy;
– the road is winding;
– if front and rear sensors both detect objects at the same time (e.g. when
passing an articulated lorry).
– ...

2.47
SAFE DISTANCE ALERT (1/2)
Activating/deactivating the
function
From the multimedia screen 2, select
the “Vehicle” menu, “Driving assist-
ance”, “Distance warning” then choose
“ON" or "OFF".
1
Using the sensor 1 , this function noti-
fies the driver about the time interval
separating them from the vehicle in
front, so they can respect a safe dis-
tance between the two vehicles.
Note: make sure that the sensor 1 is
not obscured (by dirt, mud, snow, etc.).
The function is activated when the ve-
hicle speed is between about 20 and
125 mph (30 and 200 km/h).
When the engine is started, the func-
tion maintains the same status that was
active when the engine was last stop-
ped.
You can access menu “Driving as-
sistance” directly from button 3
.
This function is an additio-
nal driving aid. However,
this function is not under
any circumstances in-
tended to replace the due care and
attention of the driver, who should at
all times be in control of the vehicle.
3
2

2.49
FATIGUE DETECTION WARNING (1/2)
The fatigue detection warning is a func-
tion which is useful on monotonous
roads (motorways, high-speed roads
etc.).
It analyses driver behaviour and takes
account of events to inform you of any
risk of fatigue such as:
– steering wheel movement;
– driver actions on other devices (indi-cators, windscreen washer etc.);
– time spent driving without stopping;
– ...
This function is an addi-
tional driving aid in case of
risk of fatigue. This function
does not take the place of
the driver.
Under no circumstances should this
function replace the driver’s care or
responsibility whilst driving.
Activation/deactivation
Vehicles fitted with a multimedia
system
From the multimedia screen 1, select
the “Vehicle” menu, “Driving assist-
ance”, “Fatigue detection warn.” then
choose “ON" or "OFF".
You can access menu “Driving as-
sistance” directly from button 2
.
2
1
When the engine is started, the
system remembers its position
when the ignition was last switched
off.

2.64
ADAPTIVE CRUISE CONTROL (4/7)
Exceeding the cruising speed
The cruising speed may be exceeded
at any time by depressing the accelera-
tor pedal.
When exceeding this speed, the crui-
sing speed and the following bars are
shown in red, and the cruising speed
flashes on the instrument panel: the
distance control function is no longer
active.
Then, release the accelerator: cruise
and distance control will automatically
reactivate unless the function has been
set to standby.
Putting the function on
standby
The function is set to standby if:
– you press switch 4 (O);
– you depress the brake pedal;
– you depress the clutch pedal;
– you use the gear lever;
– the vehicle speed is lower than 25 mph (40 km/h) or over 100 mph
(160 km/h);
– the engine speed is too low or too high;
– certain driver correction devices and aids are triggered (ABS, ESC, etc.)
In the latter three cases, the message
“Adaptive cruise Adaptive cruise” is dis-
played on the instrument panel when
the function is set to standby.
Standby is confirmed by the display of
the cruising speed in grey and the mes-
sage “Adaptive cruise ctrl”. Returning to the cruising speed
If a speed is stored, it can be recalled,
once you are sure that the road con-
ditions are suitable (traffic, road sur-
face, weather conditions, etc.). Press
switch
3 (R) if the vehicle speed is
above around 30 mph (50 km/h).
When the stored speed is recalled,
activation of the cruise control is con-
firmed by the illumination of the cruis-
ing speed in green, along with the mes-
sage “Adaptive cruise ctrl”.
When the cruise control is set to
standby, pressing switch 2, side a (+),
reactivates the cruise control function
without taking into account the stored
speed: it is the speed at which the vehi-
cle is moving that is taken into account.
2
a
b
3
4

2.66
ADAPTIVE CRUISE CONTROL (6/7)
This function is an additional driving aid. This function is not under any
circumstances intended to replace the due care and attention of the
driver, who should at all times be in control of the vehicle.
The driver should always adapt their speed to the traffic conditions, re-
gardless of the system indications.
The system should under no circumstances be taken to be an obstacle dete\
ctor
or an anti-collision system.
System servicing/repairs
– In the event of an impact, the sensor alignment may become changed, and \
its operation will consequently be affected. Deactivate the function, then consult
an authorised dealer.
– Any work in the area where the radar is located (repairs, replacements,\
touch- ing up of paintwork) must be carried out by a qualified professional.
System disturbance
In a complex environment (metal bridge, etc.), the system may be affected.
Risk of inadvertent braking.
Operating faults
When the system detects an operating
fault, the
\b warning light lights up
on the instrument panel, with the mes-
sage “Check cruise control”.
There are two possibilities:
– the system is temporarily disrupted (for example: radar obscured by
dirt, mud, snow etc.). In this case,
park the vehicle and switch off the
engine. Clean the detection zone of
the radar. When you next start the
engine, the warning light and the
message go out.
– Otherwise, this may be caused by another fault. Consult an approved
dealer