Active Safety Systems - Fiat 500X Owner's Handbook Manual

ACTIVE SAFETY
SYSTEMS
The vehicle has the following active
safety systems:
ABS (Anti-lock Braking System);
DTC (Drag Torque Control);
ESC (Electronic Stability Control);
TC (Traction Control);
PBA (Panic Brake Assist);
HSA (Hill Start Assist);
DST (Dynamic Steering Torque);
ERM (Electronic Rollover Mitigation);
TSC (Trailer Sway Control).
For the operation of the systems, see
the following description.
ABS (Anti-lock Braking
System)
This system, which is an integral part
of the braking system, prevents one
or more wheels from locking and
slipping in all road surface conditions,
irrespective of the intensity of the
braking action, ensuring that the
car can be controlled even during
emergency braking and optimising
stopping distances.
The system intervenes during braking
when the wheels are about to lock,
typically in emergency braking or low-
grip conditions, when locking may be
more frequent.
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 on corners.
The Electronic Braking Force
Distribution (EBD) system completes
the system allowing the brake force to
be distributed between the front and
rear wheels.
System intervention
A slight pulsing of the brake pedal and
noise indicates the intervention of the
ABS: this is completely normal when
the system intervenes.
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DTC (Drag Torque
Control) SYSTEM
The DTC (Drag Torque Control) system
prevents the drive wheels from possibly
locking, which could happen, for
example, if the accelerator pedal is
released suddenly or in the case of a
sudden downshifting in conditions of
poor grip. In this conditions, the engine
braking effect could cause the drive
wheels to slip, resulting in a loss of car
stability.
In these situations, the DTC system
intervenes, restoring torque to the
engine in order to conserve car stability
and increase car safety.
ESC (Electronic Stability
Control) SYSTEM
The ESC system improves the
directional control and stability of the
car in various driving conditions.
The ESC system corrects the car's
understeer and oversteer, distributing
the brake force on the wheels
appropriately. The torque supplied by
the engine can also be reduced in
order to maintain control of the vehicle.
The ESC system uses sensors
installed on the vehicle to determine
the trajectory that the driver intends
to follow and compares it with the
vehicle's effective trajectory. When the
real trajectory deviates from the desired
trajectory, the ESC system intervenes
to counter the vehicle's understeer or
oversteer.
Oversteer : occurs when the car 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.
System intervention
The system intervention is signalled
by the blinking of the instrument panel
warning light , to inform the driver
that the car is in critical stability and
grip conditions.
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