2016 RENAULT MEGANE brake sensor

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 18.6 and
86.8 mph (30 and 140 km/h)), if there
is a risk of collision with the vehicle in
front, depending on the vehicle:
– the warning light
 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

2.37
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
The function should be deactivated 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.

2.59
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 cruise control, adjusta-
ble from 30 mph to 85 mph (50 and
140 km/h), 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 their
location.
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 addi-
tional driving aid. However,
the 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.

2.65
ADAPTIVE CRUISE CONTROL (7/7)
Limitation of the system operation
– 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.
– Fixed obstacles (vehicles at a standstill, traffic jams, toll booths, etc.) or objects travelling at low speed or of a\
small size
(motorbikes, bicycles, pedestrians, etc.) may not be detected by the s\
ystem.
– A vehicle entering the same lane will only be detected once it has entere\
d the detection zone. Sudden or late braking may then take place.
– When entering a bend or a curve, it may occur that the sensor temporaril\
y no longer detects the vehicle in front, and this may lead to acceleration.
– When exiting a curve, the detection of the vehicle in front may be affected or delayed. Sudden or late braking may then take place.
– A slower vehicle travelling in an adjacent lane may be detected and cause\
a slowing down if one of the two vehicles is trav- elling too close to the lane of the other.
– The system is deactivated below around 20 mph (40 km/h). Drivers must \
react accordingly.
– Sudden changes in situation are not instantly taken into account by the \
system. Drivers must remain vigilant at all times and
under all circumstances.
Deactivating the function
The function should be deactivated 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);
– traffic is heavy;
– the vehicle is travelling in a tunnel;
– the vehicle is travelling on a windy road;
– the vehicle is travelling on a slippery road or in poor weather conditio\
ns (fog, snow, rain, side winds, etc.).
If the driver notices abnormal system behaviour, please consult an authorised dealer.