Front brakes RENAULT MASTER 2018 Owners Manual

2.17
Operating faults
When the system detects an operating
fault the message “CHECK ESC” and
warning light
© and  appear
on the instrument panel. In this case,
the ESC and traction control system
are deactivated.
Consult an approved dealer.
Electronic stability program
(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.
DRIVING CORRECTION DEVICES AND AIDS (2/8)
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.
These functions are an ad-
ditional aid in the event of
critical driving conditions,
enabling the vehicle behav-
iour to be adapted to suit the driving
conditions.
The functions do not take the place
of the driver. They do not increase
the vehicle’s limits and should
not encourage you to drive more
quickly. Therefore, they can under
no circumstances replace the vigi-
lance or responsibility of the driver
when manoeuvring the vehicle (the
driver must always be ready for
sudden incidents which may occur
when driving).

2.19
DRIVER CORRECTION DEVICES AND AIDS (4/8)
Pressing and holding one of the but-
tons 3 or 4 again will reactivate the
system. The message “AEBS ACTIVE”
is displayed and the
 indicator
light goes out on the instrument panel.
This system is reactivated each time
the ignition is switched on.
Conditions for non-activation of the
system
The system cannot be activated:
– when the gear lever is in neutral;
– when the parking brake is activated;
– while cornering.
Operation
While driving (at speeds of between
about 9 and 62 mph (15 and 100 km/h)),
if there is a risk of collision with the ve-
hicle in front, the warning light

will flash on the instrument panel in red
and a beep will sound.
If the driver depresses the brake pedal
and the system still detects a collision
risk, the warning light
 continues
to flash on the instrument panel, ac-
companied by a beep, until the system
no longer detects any risk of collision.
If the driver fails to react following
an alert of an imminent collision, the
system activates the brakes.
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.
Activating/deactivating the system
With the vehicle stationary and the ig-
nition on:
– repeatedly press button 3 or 4 to
select the “AEBS ACTIVE” function
on the display 2;
– press and hold button 3 or 4 for
around 3 seconds to deactivate
the system. The message “AEBS
DEACTIVATED” will be displayed
and the
indicator light on the
instrument panel will light up and
stay on to confirm the deactivation of
the system.
3
4
2

2.49
SEQUENTIAL GEARBOX (5/5)
Load position
When the vehicle is driven loaded,
press the 6 switch on the dashboard.
The indicator light
§ on the instru-
ment panel will light up.
Load mode is deselected every time
the engine is switched off. It will be nec-
essary to select it again.
Load mode may be used to equal effect
in both automatic and manual modes.
6
Bleep– If you hold the vehicle on a slope for too long without applying the
brakes or handbrake, you will strain
the system (risk of overheating the
clutch).
In this case, an intermittent beep- ing sound will remind you that you
should put your foot on the brake
pedal or apply the handbrake.
– Never leave the vehicle with the engine running when in gear. For
safety reasons you will hear an in-
termittent beeping sound when you
open the door if you have not shifted
into neutral or you have not switched
off the ignition or depressed the
brake pedal.
Special circumstances
On a slippery surface or surface with
little grip, change to manual mode
(A/M) and select second gear before
accelerating to avoid wheelspin.
Operating faults
i
If this warning light comes on
when the vehicle is in motion , it
indicates a fault in the system. In most
cases, you may still drive the vehicle,
although it will not function perfectly.
Contact an approved dealer as soon as
possible.
Towing a vehicle with a sequential
gearbox
If the gearbox is stuck in a gear:
– switch on the ignition;
– select neutral with the brake pedal
depressed;
– check that the gearbox is in neutral (by pushing the vehicle, for exam-
ple).
If you cannot find neutral you must tow
the vehicle with the front wheels raised.
The vehicle should always be towed
with the ignition switched off.