wheel torque FIAT PUNTO 2014 Owner handbook (in English)

73
SAFETYSTARTING
AND DRIVINGWARNING
LIGHTS AND
MESSAGESIN AN
EMERGENCYSERVICE
AND CARETECHNICAL
SPECIFICATIONSINDEXCONTROLS
AND DEVICES
ESP SYSTEM (Electronic
Stability Program) (for versions/markets, where provided)This is an electronic system that controls
car stability in the event of tyre grip loss,
helping to maintain directional control.
The ESP system is therefore particularly
useful when road surface grip changes.
In addition to the ESP system, ASR system
and Hill Holder, the MSR system (adjusting
the engine braking torque) and the HBA
system (improving the braking force dur-
ing emergency braking) are also provided
(for versions/markets, where provided).
SYSTEM INTERVENTION
This is signalled by the flashing of warn-
ing light
á
on the instrument panel, to in-
form the driver that the car is in critical
stability and grip conditions.
When the ABS cuts in and
you feel the brake pedal pul-
sating, do not remove your foot, but
keep the pedal pushed down; in do-
ing so you, will stop in the shortest
distance possible under the road con-
ditions at the time.
WARNING
EBD failure
This is indicated by the
>
and
x
warn-
ing lights on the instrument panel togeth-
er with the dedicated message on the mul-
tifunction display (for versions/markets,
where provided) coming on (see “Warn-
ing lights and messages” section).
In this case, the rear wheels may sudden-
ly lock and the vehicle may swerve when
braking sharply. Drive carefully to the
nearest Fiat Dealership to have the system
checked.
If only the
x
warning light
on the instrument panel
lights up (together with a message in
the multifunction display, for ver-
sions/markets, where provided) stop
the vehicle immediately and contact
the nearest Fiat Dealership. Fluid
leaking from the hydraulic system will
compromise the operation of the
braking system, whether it is of the
conventional type or with ABS.
WARNING
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74SAFETYSTARTING
AND DRIVINGWARNING
LIGHTS AND
MESSAGESIN AN
EMERGENCYSERVICE
AND CARETECHNICAL
SPECIFICATIONSINDEXCONTROLS
AND DEVICES
SYSTEM ACTIVATION
The ESP system is automatically activat-
ed when the car is started and cannot be
de-activated.
FAILURE INDICATIONS
In the event of a failure, the ESP will be au-
tomatically switched off and the
á
warn-
ing light will come on permanently on the
instrument panel along with a message on
the multifunction display (for versions/
markets, where provided) (see “Warning
lights and messages” section). The LED on
the ASR OFF button will also light up.
Contact a Fiat Dealership as soon as pos-
sible if this happens.
HYDRAULIC BRAKE ASSIST
(integrated ESP emergency
braking assistance)
(for versions/markets, where provided)
This system (which is compulsory) recog-
nises emergency braking according to the
speed of operation of the brake pedal and
provides additional hydraulic braking pres-
sure to support that applied by the driver.
This allows faster and more powerful op-
eration of the braking system.
The Hydraulic Brake Assist is deactivat-
ed on versions equipped with ESP, in the
event of an ESP system failure (indicated
by warning light
á
switching on together
with the message in the multifunctional
display, for versions/markets, where pro-
vided).
Do not take unnecessary
risks, even if your vehicle is
fitted with an ESP system. Your dri-
ving style must always be suited to the
road conditions, visibility and traffic.
The driver is always ultimately re-
sponsible for road safety.
WARNING
HILL HOLDER SYSTEM
This is an integral part of the ESP system,
making hill-starts easier.
It is automatically activated in the follow-
ing conditions:❒
uphill: vehicle stationary on a road with
a gradient higher than 5%, engine run-
ning, brake pedal pressed and gearbox
in neutral or gear other than reverse;
❒
downhill: vehicle stationary on a road
with a gradient higher than 5%, engine
running, brake pedal pressed and re-
verse gear engaged.
At pick-up, the ESP system control unit
will maintain the braking pressure at the
wheels until the necessary engine torque
for moving away is reached or, in any case,
for a maximum of 2 seconds in order to
move easily from the brake pedal to the
accelerator pedal.If the vehicle has not departed after this
time, the system will deactivate automat-
ically by gradually releasing the brake
force.
At release, the typical brake disengage-
ment noise indicating that the car is go-
ing to move will be heard.
Failure indications
System failure is indicated by the turning
on of warning light *on the instrument
panel with digital display and warning light
á
on the instrument panel with multi-
function display (for versions/markets,
where provided) (see section “Warning
lights and messages”).
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 se-
lected first gear.
For the correct operation of
the ESP and ASR systems it
is vital that the tyres are the same
type on all the wheels, in perfect con-
dition and, above all, the recom-
mended size.
WARNING
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75
SAFETYSTARTING
AND DRIVINGWARNING
LIGHTS AND
MESSAGESIN AN
EMERGENCYSERVICE
AND CARETECHNICAL
SPECIFICATIONSINDEXCONTROLS
AND DEVICES
MSR system
(engine braking regulation)
This is an integral part of the ASR system
that, in case of sudden gear shifting, cuts
in to provide torque to the engine, thus
preventing excessive driving wheel drag
that, especially in poor grip conditions, can
lead to loss of stability.Switching the system
on/off fig. 97
The ASR system switches on automatically
each time the engine is started.
When travelling, the ASR can be switched
off and on again by pressing button Alo-
cated on the dashboard fig. 97. If the system is off, the LED on the button
lights up together with a message shown
on the multifunction display (for versions/
markets, where provided).
If the ASR is switched off when travelling,
it will turn on again automatically the next
time the engine is started.
When travelling on snowy roads with
snow chains, it may be helpful to turn the
ASR off: in fact, in these conditions, the
driving wheels skidding when moving off
makes it possible to get better traction.
For the correct operation of
the ESP and ASR systems it
is vital that the tyres are the same
type on all the wheels, in perfect con-
dition and, above all, the recom-
mended size.
WARNING
fig. 97
ASR
OFF
F0M0109m
ASR SYSTEM (Anti-slip Regulator)
This function controls car drive and cuts
in automatically every time one or both
driving wheels skid.
Depending on how skiddy the road is,
two different control systems are acti-
vated:❒
if the skidding involves both drive
wheels, the ASR function intervenes
by reducing the power transmitted by
the engine;
❒
if the skidding involves only one dri-
ving wheel, the ASR system cuts in by
automatically braking the wheel that
is sliding.
The ASR system is particularly helpful in
the following circumstances:
❒
skidding of the inner wheel when cor-
nering due to the effect of dynamic
load changes or excessive acceleration;
❒
too much power transmitted to the
wheels in relation to the conditions of
the road surface;
❒
acceleration on slippery, snowy or
icy surfaces;
❒
loss of grip on a wet surface (aqua-
planing).
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