Table of Contents
Advertisement
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 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 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 wheel.
The ESC system also includes the
following subsystems:
Hill Holder
ASR
HBA
ERM
HDC
65) 66) 67)
SYSTEM INTERVENTION
This is signalled by the flashing of the
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.
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
transmission 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 the 2 seconds have elapsed,
without starting, the system is
automatically deactivated, gradually
releasing the braking pressure.
During this release stage, the typical
mechanical brake release noise
indicating that the vehicle is going to
move imminently will be heard.
WARNING The Hill Holder system
is not a parking brake; therefore,
never leave the vehicle without having
engaged the parking brake, turned the
engine off and engaged 1 st 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.
117
Advertisement
Table of Contents
