Maserati GranTurismo Sport 2015, Owner'S Manual

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ASR system
The ASR system is designed to help
avoid skidding of the driving wheels
during acceleration by means of the
engine control unit (spark advance
delay, engine throttle opening
reduction and fuel injection cut-out)
and the rear brakes.
The
ASR system is designed to
enhance vehicle stability and active
safety while driving, specially under
the following conditions:
- internal wheel slip on curves due
to the load dynamic variations or
excessive acceleration
- excessive power transmitted to the
wheels, also in relation to road
conditions
- acceleration on slippery, snowy or
icy road surfaces
- in the event of loss of grip on wet
roads (aquaplaning).
The ASR system is designed to work
in combination with the electronic
suspension control system: under
normal conditions (
SPORT mode
off), stability in low and medium
grip conditions has priority, while
with
SPORT mode active, the system
favors traction and optimizes vehicle
performance on dry asphalt.
Activation
The ASR system is automatically
activated every time the engine
starts; it can be overridden by
pressing button
A (see page 43) for
approximately 2 seconds. In this case
the warning light
lights up on the
dial and on the display, and the latter
displays a specific message.
To turn the system back on, press
button
A again. During every stage
of the operation, the amber warning
light
will flash on the instrument
panel.
Malfunction indicators
In the event of a malfunction, the
system is automatically deactivated
and it is not possible to reactivate it.
While the vehicle is moving, this state
is indicated by the illumination of the
amber icon
on the multifunction
display, which also displays the
message “ASR failure, go to dealer”.
On the instrument panel, the warning
light
comes on.
MSR function (engine braking
torque adjustment)
The ASR system is also designed to
help control the engine braking
torque when the accelerator pedal
is released under low grip conditions
(e.g., snow, ice etc.): in these
conditions, the high braking torque
provided by the engine may cause
instability of the vehicle.
The system, using the same sensors
as the ABS, detects skidding of one
or both driving wheels when the
accelerator is released and opens the
motor-driven throttle of the engine
fuel system, thus reducing the braking
torque and re-establishing optimal
grip conditions for the driving wheels.
WARNING: The maximum
deceleration that can be obtained
with the engine brake always
depends on the tire grip on the road
surface. Snow or ice obviously reduces
grip.