Asr System - Maserati GRANCABRIO Owner's Manual

ASR system

The ASR system avoids 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) and the rear brakes.
2
The ASR system is designed to
enhance vehicle stability and active
safety while driving, specially under
the following conditions:
- internal wheel skidding on curves
due to the load dynamic variations
or excessive acceleration
- excessive power transmitted to the
wheels, also in relation to the road
surface conditions
- acceleration on slippery, snowy or
icy road surfaces
- in the event of loss of grip on wet
roads (aquaplaning).
44
The ASR system works in combination
with the electronic suspension
control system: in normal conditions
(SPORT mode off), stability in low and
medium grip conditions has priority,
while with SPORT mode active, the
system favours traction, thereby
optimising vehicle performance on
dry asphalt.
System activation
The ASR system is automatically
activated every time the engine is
started and can be deactivated by
pressing button A (see page 43) for
about 2 seconds; the warning light
illuminates on the instrument
panel and on the display, where it is
accompanied by a specifi c message.
Press button A again to reactivate the
system.
The amber warning light
instrument panel fl ashes during all
the operating phases.
Malfunction indicators
In the event of a fault, the system is
automatically disabled and cannot
be re-activated. While driving, this
condition is signalled by the amber
warning light on the multi-
function display, which illuminates
together with the message "ASR
unavailable go to dealer". The
warning light
instrument panel.
MSR function (engine braking
torque adjustment)
The ASR system also controls 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 thereby reducing the
braking torque and re-establishing
on the
the maximum grip conditions for the
driving wheels.
WARNING: The maximum
deceleration that can be obtained
with the engine brake always
depends on the tyre grip on the road
surface. Snow or ice obviously reduce
grip values.
illuminates on the