sensor RENAULT MEGANE 2018 User Guide

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)

2.34
DRIVER CORRECTION DEVICES AND AIDS (5/10)
If the driver depresses the brake pedal
and the system still detects a risk of col-
lision, the brake force is increased.
If the driver fails to react following
an alert of an imminent collision, the
system activates the brakes.
Active emergency braking
Using the sensor 1, the system calcu-
lates the distance separating the vehi-
cle from the one in front and alerts the
driver if there is a risk of a front-end col-
lision. The driver can then brake the ve-
hicle to limit the damage arising from a
collision.
Note: Make sure that the sensor 1 is
not obscured (by dirt, mud, snow, etc.).
Operation
When driving (speed between 19 and
87 mph (30 and 140 km/h) or depend-
ing on the vehicle, 93 mph (150 km/h)),
if there is a risk of collision with the ve-
hicle in front, depending on the vehicle:
– the warning light
\b is displayed
in red on the instrument panel, ac-
companied by a beep;
or
– the indicator 2 is displayed in red on
the instrument panel and, depending
on the vehicle, on the head up dis- play, accompanied by a beep.
The system only detects vehicles
driving in the same direction of traf-
fic. The system cannot detect mo-
torcycles because of the difficulty in
forecasting their trajectory.
1
2

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.

2.37
DRIVER CORRECTION DEVICES AND AIDS (8/10)
Active emergency braking
Limitation of the system operation
– The system will only respond to vehicles which are moving or which have \
been sensed as moving.
– A vehicle travelling in the opposite direction will not trigger any alert\
or any action on the system operation.
– The sensor area should be kept clean and free of any modifications in or\
der to ensure the proper operation of the system.
– The system cannot respond to small vehicles such as motorbikes or bicycl\
es as effectively as to other vehicles.
Deactivating the function
You must disable the function if:
– the brake lights are not functioning;
– the front of the vehicle has undergone an impact or been damaged;
– the vehicle is being towed (breakdowns).
Halting the function
You can halt the active braking function at any time by tapping the accel\
erator pedal or by turning the steering wheel in a avo id-
ance manoeuvre.
If the driver notices any unusual behaviour in the system, please consul\
t an authorised dealer.

2.43
BLIND SPOT WARNING (1/4)
This system alerts the driver to other
vehicles in the detection zone A.
The system is activated when the vehi-
cle’s speed is between approximately
30 km/h (19 mph) and 140 km/h (87
mph).
This function uses sensors 1 installed
in the front and rear bumper of both
sides.
1
A
Special feature
Make sure that the sensors are not ob-
scured (by dirt, mud, snow, etc.).
If a sensor is obscured, the message
“Blind spotclean sensor” will appear on
the instrument panel. Clean the sen-
sors.
AThis function is an addi-
tional aid which indicates
other vehicles in the blind
spot area.
It can never in any case be a sub-
stitute for care nor for the driver’s
responsibility while in charge of his
vehicle.
The driver should always be ready
for sudden incidents while driv-
ing: always ensure that there are
no small, narrow moving obstacles
(such as a child, animal, pushchair,
bicycle, stone, post etc.) in the blind
spot when manoeuvring.

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

2.48
SAFE DISTANCE ALERT (2/2)
The measurement is dis-
played for information only:
the system performs no
action on the vehicle.
This function is not designed for use
in urban conditions or for a dynamic
driving style (sudden cornering, ac-
celeration, braking, etc.), but rather
for stable driving conditions.
The function does not interact with
the braking system.
The sensor area should be kept
clean and free of any modifications
in order to ensure the proper opera-
tion of the system.
Any work in the area where the
radar is located (repairs, replace-
ments, touching up of paintwork)
must be carried out by a qualified
professional.
– C (orange): the time interval falls
between around 1 and 2 seconds (in-
sufficient distance between the two
vehicles);
– D (red): the time interval is less than
or equal to around one second (very
insufficient distance between the two
vehicles).
If the interval between the two vehicles
is less than around 0.5 seconds, war-
ning light 4 will flash on the instrument
panel. Under certain conditions, the
time interval may not be displayed:
– while cornering;
– when changing lane;
– if the vehicle in front is sufficiently far or outside the range of the sensor.
This function is essential if adaptive
cruise control is activated.
On equipped vehicles, some infor-
mation is given on the head-up dis-
play.
4A
B
C
D
Operation
Upon activating the function, indicator 4
notifies the driver of the distance sepa-
rating them from the vehicle in front.
– A (grey): function not operational;
– A (green): no vehicle detected;
– B (green): the time interval is greater
than or equal to around two seconds
(distance between the two vehicles
adapted to your speed);

2.61
ADAPTIVE CRUISE CONTROL (1/7)
When traffic conditions permit (large
free-flowing road or motorway), the
adaptive cruise control gives you the
option of maintaining a chosen speed,
known as the cruising speed, which can
be set from 31 mph to 87 mph (50 and
140 km/h), or 93 mph (150 km/h) de-
pending on the vehicle, while keeping
a following distance from the vehicle in
front in the same lane.
The sensor has a range of 120 metres.
Note: The driver should take into ac-
count the maximum speed limit in the
country where they are driving.
Note: the adaptive cruise control can
brake the vehicle up to a third of the
braking capacity. Depending on the
situation, the driver may need to brake
harder.
This function is an additio-
nal driving aid. This function
does not take the place of
the driver.
Therefore, it can under no circum-
stances replace the driver’s respon-
sibility to respect speed limits and to
be vigilant (the driver must always
be ready to brake).
The adaptive cruise control should
not be used in heavy traffic, on
winding or slippery roads (black ice,
aquaplaning, gravel) and during bad
weather (fog, rain, side winds etc.).
There is a risk of accidents.
Sensor location
Make sure that the sensor 1 is not ob-
scured (by dirt, mud, snow, etc.).
1
On equipped vehicles, some infor-
mation is given on the head-up dis-
play.

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