wheel torque FIAT DUCATO 2015 3.G Owners Manual

ABS
This is an integral part of the braking
system, which prevents one or more
wheels from locking or slipping
regardless of the road surface
conditions and braking intensity,
ensuring control of the vehicle even
during emergency braking.
The system intervenes when braking
and the wheels are about to lock,
typically in emergency braking or
low-grip conditions, when locking may
be more frequent.
The ABS ensures the direction of the
vehicle while braking and optimises the
braking distances at the same time.
The system also improves control and
stability of the car when braking on a
surface where the grip of the left and
right wheels varies, or when braking on
corners.
The system is completed by EBD
(Electronic Braking Force Distribution),
which distributes the braking action
between the front and rear wheels.
IMPORTANT To obtain the maximum
efficiency of the braking system, a
bedding-in period of about 500 km is
needed: during this period it is better to
avoid sharp, repeated and prolonged
braking.
50)
SYSTEM INTERVENTION
The driver can feel that the ABS has
come into action because the brake
pedal pulsates slightly and the system
gets noisier: it means that the car
speed should be altered to suit the type
of road surface.
51) 52) 52) 53) 54) 55) 56) 57)
MSR SYSTEM
(Motor Schleppmoment Regelung)
This system is an integral part of the
ABS and intervenes, if there is sudden
downshifting, restoring torque to the
engine, thereby preventing excessive
drive at the drive wheels which,
especially in poor grip conditions, could
lead to a loss in stability of the vehicle.
WARNING
50) The ABS exploits the grip
available to the full, but it cannot
improve it. Therefore, you should
take great care when driving on
slippery surfaces, without taking
unnecessary risks.51) When the ABS intervenes and
you notice the brake pedal
pulsating, keep the pedal pushed
down and don’t be alarmed. This
will help you to stop in the
shortest distance possible,
depending on the road conditions.
52) If the ABS intervenes, it means
you have almost reached the grip
limit between the tyres and the
road surface: slow down to make
sure that you drive in accordance
with the available grip
53) The ABS can’t overrule the
natural laws of physics, and can’t
increase the grip available
according to the condition of the
road.
54) The ABS cannot prevent
accidents, including those due to
excessive speed on corners,
driving on low-grip surfaces or
aquaplaning.
55) The capability of the ABS must
never be tested irresponsibly and
dangerously, in such a way as
to compromise personal safety
and the safety of others.
56) For the correct operation of the
ABS, it is essential that the tyres
are of the same make and type on
all wheels, in perfect condition
and, above all, of the specified
type and dimensions.
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57) If the space-saver wheel (for
versions/markets, where
provided) is used, the ABS keeps
operating. Always remember
that the space-saver wheel, being
smaller than the original wheel,
provides less grip.ESC (Electronic
Stability Control)
SYSTEM
(for versions/markets, where provided)
The ESC system improves the
directional control and stability of the
vehicle in various driving conditions.
The ESC system corrects the vehicle’s
understeer and oversteer, distributing
the brake force on the appropriate
wheels. The torque supplied by the
engine can also be reduced in order to
maintain control of the vehicle.
The ESC system uses the sensors in
the vehicle to determine the trajectory
required by the driver through steering
and compares it with the real trajectory
of the vehicle. When the real trajectory
deviates from the desired trajectory, the
ESC system intervenes to counter the
car’s understeer or oversteer.
❒Oversteer: occurs when the vehicle is
turning more than it should according
to the angle of the steering wheel.
❒Understeer: occurs when the vehicle
is turning less than it should
according to the angle of the steering
wheelThe ESC system also includes the
following subsystems:
❒Hill Holder
❒ASR
❒HBA
❒ERM
❒HDC
58) 59) 60)
SYSTEM INTERVENTION
This is signalled by the flashing of
warning light
in the instrument panel,
to inform the driver that the vehicle is
in critical stability and grip conditions.
SYSTEM ACTIVATION
The ESC system switches on
automatically when the engine is
started and cannot be switched off.
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KNOW YOUR VEHICLE

HILL HOLDER SYSTEM
This system is an integral part of the
ESC system and facilitates starting on
slopes.
It is automatically activated in the
following conditions:
❒uphill: vehicle stationary on a road
with a gradient higher than 5%,
engine running, brake pressed and
gearbox in neutral or gear (other than
reverse) engaged;
❒downhill: vehicle stationary on a road
with a gradient higher than 5%,
engine running, brake pressed and
reverse gear engaged.
When setting off, the ESC system
control unit maintains the braking
pressure on the wheels until the torque
necessary for starting is reached, or
in any case for a maximum of 2
seconds, allowing your right foot to be
moved easily from the brake pedal to
the accelerator.
When two seconds have elapsed,
without starting, the system is
automatically deactivated, gradually
releasing the braking pressure. During
this release stage, the typical brake
disengagement noise indicating that the
vehicle is going to move imminently
will be heard.IMPORTANT The Hill Holder system is
not a parking brake; therefore, never
leave the vehicle without having
engaged the handbrake, turned the
engine off and engaged first gear,
so that it is parked in safe conditions
(for further information read the
"Parking" paragraph in the "Starting
and driving" chapter).
ASR (AntiSlip
Regulation) SYSTEM
It is an integral part of the ESC system.
It automatically operates in the event
of one or both drive wheels slipping,
loss of grip on wet roads (aquaplaning)
and acceleration on slippery, snowy
or icy roads, etc.
Depending on the slipping conditions,
two different control systems are
activated:
❒if the slipping involves both drive
wheels, the ASR intervenes reducing
the power transmitted by the engine;
❒if the slipping only involves one of the
drive wheels, it intervenes
automatically braking the wheel that
is slipping.
62)
Engagement/ disengagement of the
ASR system
The ASR system switches on
automatically each time the engine is
started.
Whilst driving, the ASR can be switched
off and subsequently switched on
again by pressing the ASR OFF button
fig. 125.
61)
On some versions, the intervention of
the system is indicated by a message
shown on the display.
When the system is not active, the LED
on the button ASR OFF turns on and,
on some versions, a message appears
on the display.
If the ASR is disengaged during driving,
it is automatically reactivated when
the vehicle is next started.
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Traction Plus operation
The system is deactivated when
starting. To activate the Traction Plus
system, press button A fig. 127: the
LED on the button switches on.
The activation of the Traction Plus
system involves the following functions
being switched on:
❒inhibition of the ASR function, in
order to fully exploit the engine
torque;
❒the differential locking effect on the
front axle, through the braking
system, to improve traction
on irregular grounds.
If the Traction Plus system is faulty, the
warning light on the instrument
panel switches on constantly.When travelling on snowy roads with
snow chains, it may be helpful to turn
the Traction Plus on and thus inhibiting
the ASR function: in fact, in these
conditions, slipping of the drive wheels
when moving off makes it possible to
obtain better traction.
WARNING
67) The Traction Plus system acts
effectively only on road surfaces
that are not homogeneous and/or
differentiated between the two
drive wheels.
68) Until the setting off manoeuvre is
terminated, fully depress the
accelerator pedal in order to
transfer all the drive torque to the
wheel with the best grip.
TPMS (Tyre
Pressure
Monitoring System)
(for versions/markets, where provided)
69) 70) 71) 72) 73) 74) 75) 76) 77)
DESCRIPTION
The tyre pressure monitoring system
(TPMS) warns the driver of low tyre
pressure on the basis of the cold
inflation pressure prescribed for the
vehicle.
Changes in outside temperature may
cause tyre pressure to vary. This means
that a decrease in the outside
temperature corresponds to a decrease
in the tyre pressure.
Tyre pressure must always be adjusted
according to the cold inflation pressure.
Cold tyre inflation pressure is the tyre
pressure after letting the vehicle stand
for at least three hours or a travel
shorter than 1.6 km after an interval of
three hours.
The cold tyre inflation pressure must
not exceed the maximum inflation
pressure value printed on the side of
the tyre.
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