Maserati GranTurismo Owner's Manual page 60

Understanding the Vehicle
and then applies optimum pressure
to the brakes to help reduce braking
distances.
The quick brake coupling is optimal for
BAS performances. To fully exploit the
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system, apply continuous brake pedal
pressure during the entire vehicle stop
sequence. Do not reduce brake pedal
pressure earlier than required. Once
the brake pedal is released, the BAS is
deactivated.
Brake Throttle Override (BTO)
To complete the range of systems
that assist braking, the vehicle is
equipped with BTO, which is designed
to stop the vehicle even when it
is being accelerated. If the brake
pedal is depressed together with the
accelerator, the system does not
consider as "conflict" the sequence
"brake-first-then-accelerator" of pedal
application and it may not engage the
BTO. When the system recognizes that
the accelerator pedal is stuck pressed
and the sequence "accelerator-first
then- brake-pressed" (this sequence is
recognized as a "conflict"), the engine
power will be automatically reduced
and, if the driver continues to depress
the accelerator, the system can make
the vehicle to come to a complete stop.
Additionally, if the brake pedal is
released when the accelerator is still
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stuck pressed, the corresponding engine
torque increase gradually to a safe value.
During this event, the ETC light indicator
may be illuminated.
The system exits from this strategy
when the accelerator pedal is
completely unstuck.
Hill Start Assist (HSA)
The HSA system is designed to assist
the driver when starting a vehicle uphill.
HSA will maintain the level of brake
pressure applied for a short period of
time also after releasing the brake pedal.
If the driver does not apply the throttle
during this short period of time, the
system will release brake pressure
and the vehicle will start sloping
down. The system will release brake
pressure proportionally to the amount of
throttle/torque applied as the vehicle
starts to move in the chosen direction.
HSA Activation Criteria
The following criteria must be met in
order for HSA to activate (if the proper
setting is activated on the MIA screen):
• vehicle is stationary.
• gear selection matches vehicle uphill
direction (i.e., vehicle facing uphill is in
forward gear; vehicle backing uphill is
in reverse gear).
HSA will work in R (Reverse) and all
forward gears when the activation
criteria have been met.
The system will not activate if the
transmission is placed in N (Neutral) or P
(Park).
Roll-Over Mitigation (ROM)
This system anticipates the potential
for wheel lift by monitoring the driver's
steering wheel input and the speed of
the vehicle. When ROM determines that
the rate of change of the steering wheel
angle and vehicle's speed are sufficient
to potentially cause wheel lift, it then
applies the appropriate brake and may
also reduce engine power to lessen the
chance that wheel lift will occur.
ROM will only intervene during very
severe or evasive driving manoeuvres.
ROM can only reduce the chance of
wheel lift occurring during severe or
evasive driving manoeuvres. It cannot
prevent wheel lift due to other factors,
such as road and off-road conditions,
leaving the roadway, or striking objects
or other vehicles.