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stantly changed and controlled in
the attempt to keep the driver's
direction.
The ESP system considerably
increases the car safety in several
critical conditions and it is particu-
larly useful during overtaking, when
the grip conditions on the road bed
change.
To make ESP, ASR and
ABS systems work prop-
erly,
the
tyres
absolutely be of the same brand
and type on all wheels, in perfect
conditions and, above all, of type,
brand and size specified.
ASR FUNCTION (ANTISLIP
REGULATION)
General
The ASR function is part of the
ESP system and it checks the car
drive, taking action every time one
or both driving wheels slip, thus pre-
venting car instability and tyre wear.
On the basis of slipping conditions,
two different check systems are acti-
vated:
– if slipping affects both driving
wheels, as a result of the excessive
force transmitted, the ASR function
reduces the power supplied by the
engine;
must
– if slipping affects only one of the
driving wheels, the ASR function
automatically brakes the slipping
wheel, with an effect similar to the
self-locking differential.
The action of the ASR function is
particularly useful in the following
conditions:
– internal wheel slipping when cor-
nering due to load dynamic varia-
tions and excessive acceleration;
– excessive power supplied to
wheels according to the road bed;
– acceleration on slippery ground,
covered with snow or ice;
– in case of grip loss on wet ground
(aquaplaning).
ASR function activation
The ASR function is activated
automatically whenever the engine
is started.
During driving it is possible to dis-
engage and engage this function by
pressing button A (fig. 142) on the
central console.
When the ASR function is on, sym-
bol V is lighted on the multifunc-
tion display together with the mes-
sage "ASR ON".
191
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