MSR system
(engine braking torque control)
This is an integral part of the ASR system that, in the event
of a sudden gear down shift, cuts in and provides torque
to the engine thus preventing excessive drive wheel dri-
ve which, especially in poor grip conditions, can lead to
a loss of stability.
Switching the system on/off, fig. 126
The ASR system switches on automatically each time the
engine is started.
When travelling, the ASR can be switched off and on again
pressing button A located among the controls in the dash-
board, fig. 126.
The switching off is shown by the LED in the actual switch
coming on together with a message shown in the multi-
function display, for versions/markets where provided.
On versions with an ASR system only, when it is switched
off (ASR OFF) the
V warning light remains on constantly.
ASR SYSTEM (Anti-slip Regulator)
The ASR function controls vehicle drive and cuts in
automatically every time one or both drive wheels slip.
Depending on how skiddy the road is, two different con-
trol systems are activated:
❒
if the slipping involves both drive wheels, the ASR func-
tion intervenes by reducing the power transmitted by
the engine;
❒
if the skidding involves only one driving wheel, the
ASR system cuts in by automatically braking the wheel
that is sliding.
The action of the
ASR is particularly helpful in the fol-
lowing circumstances:
❒
slipping of the inner wheel when cornering due to
the effect of dynamic load changes or excessive
acceleration;
❒
too much power transmitted to the wheels also in
relation to the conditions of the road surface;
❒
acceleration on slippery, snowy or icy surfaces;
❒
in the case of loss of grip on a wet surface (aquaplaning).
112
DASHBOARD
AND CONTROLS
SAFETY
STARTING
AND DRIVING
WARNING LIGHTS
AND MESSAGES
IN AN EMERGENCY
MAINTENANCE
AND CARE
TECHNICAL
SPECIFICATIONS
INDEX
For the correct operation of the ESP and
ASR systems, the tyres must be the same
make and type on all wheels, in perfect condition
and, above all, of the type, make and size recom-
mended.
WARNING
037-122 DUCATO LUM EN 11-02-2010 14:27 Pagina 112
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