Subaru Impreza 2017 Owner's Manual page 288

7-20
Starting and operating/Braking
during normal braking, and the braking
distance will increase.
! Supplemental booster function
when vacuum pressure fails
While the ignition switch is turned ON
and the engine is running, the supple-
mental booster function operates when
the brake booster performance is de-
creased due to insufficient vacuum boost.
When the brake pedal is depressed while
the supplemental booster function is oper-
ating, an operation sound and brake pedal
vibration may be generated. This is not a
malfunction.
! Brake assist system
WARNING
Do not be overconfident about the
brake assist. It is not a system that
brings more braking ability to the
vehicle beyond its braking capabil-
ity. Always use the utmost care
when driving regarding vehicle
speed and safe distance.
CAUTION
When you need to brake suddenly,
continue depressing the brake pedal
strongly to bring the effect of the
brake assist.
Brake assist is a driver assistance system.
It assists the brake power when the driver
cannot depress the brake pedal strongly
and the brake power is insufficient.
Brake assist generates the brake power
according to the speed at which the driver
depresses the brake pedal.
NOTE
When you depress the brake pedal
strongly or suddenly, the following
phenomena occur. However, even
though these occur, they do not indi-
cate any malfunctions, and the brake
assist system is operating properly.
. You might feel that the brake pedal
is applied by lighter force and gener-
ates a greater braking force.
. You might hear the sound of the
ABS operating from the engine com-
partment.
! Emergency Stop Signal
The Emergency Stop Signal is a function
that automatically blinks the hazard warn-
ing flasher in short intervals when the
brake pedal is depressed suddenly. The
rapid flashing of the hazard warning
flasher cautions the vehicles behind and
reduces the possibility of a collision.
CAUTION
The Emergency Stop Signal is acti-
vated in priority over the turn signal.
! Operating condition
The Emergency Stop Signal activates
when all of the following conditions are
met.
. The hazard warning flasher is off.
. The vehicle speed is 60 km/h (37 mph)
or more.
. The system judges that sudden braking
has occurred based on the vehicle decel-
eration when the brake pedal is de-
pressed.
! Automatic cancel
The Emergency Stop Signal is canceled in
either of the following circumstances.
. The hazard warning flasher is turned
on.
. The brake pedal is released.
. The system judges that sudden braking
has ended, based on the vehicle decel-
eration.
The operational/non-operational setting of
the Emergency Stop Signal can be chan-
ged by a SUBARU dealer. For details, we
recommend that you contact your