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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.
68)
Engagement/ disengagement of
the ASR system
The ASR system switches on
automatically each time the engine is
started.
While driving, the ASR can be switched
off and subsequently switched on
again by pressing the ESC OFF
fig. 162 button.
69)
162
118
If the ASR is disengaged during driving,
it is automatically reactivated when the
vehicle is next 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 gives you better traction.
HBA SYSTEM
(Hydraulic Brake Assist)
The HBA system is designed to
improve the braking capacity of the
vehicle during emergency braking. The
system detects an emergency braking
by monitoring the speed and strength
with which the brake pedal is pressed,
thereby applying the optimal brake
pressure.
(A)
This can reduce the braking distance:
the HBA system therefore completes
the ABS.
Maximum assistance from the HBA
system is obtained pressing the
brake pedal very quickly. In addition,
the brake pedal must be pressed
continuously during braking, avoiding
intermittent presses, to benefit from the
system.
Do not reduce pressure on the
brake pedal until braking is no longer
F1A0709
necessary.
The HBA system is deactivated when
the brake pedal is released.
70) 71) 72)
ERM (ELECTRONIC ROLLOVER
MITIGATION) SYSTEM
The system monitors the tendency of
the wheels to rise from the ground
if the driver performs extreme
manoeuvres like quick steering to avoid
an obstacle, especially in poor road
conditions.
If these conditions occur, the system
intervenes on the brakes and engine
power to reduce the possibility that the
wheels are raised from the ground.
It is not possible to avoid the tendency
to roll over if this is due to reasons
such as driving on high side gradients,
collision with objects or other vehicles.
73)
HILL DESCENT CONTROL
(HDC) SYSTEM
It is an integral part of the ESC and
is aimed at keeping the vehicle at a
constant speed during a descent,
operating autonomously on the brakes
in various ways at the same time.
In this way the vehicle stability and
completely safe driving are guaranteed,
above all in poor grip conditions and/or
steep descents.
To activate the system, reach a speed
slower than 25 km/h and press the
corresponding button (A)fig. 163; the
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