Subaru Ascent 2023 Manual page 399

. If the vehicle is reversed at an
extremely slow speed, the driver's
operation may be prioritized. In this
case, automatic braking will not
operate.
. The system may not be able to detect
and apply the brake with the follow-
ing objects.
– Sharp or thin objects such as
poles, fences and ropes which
may not reflect the sound wave
emitted from the sonar sensor.
– Objects that are too close to the
rear bumper when the select
lever is set to the "R" position.
– Objects with a surface which may
not reflect the sound wave
emitted from the sonar sensor
such as a chain link fence.
. Objects the system is not designed
to detect and apply brake.
– Pedestrians.
– Moving objects including moving
vehicles.
– Objects which absorbs sound
waves such as cloth or snow.
– Objects whose surface has a
diagonal angle.
– Objects that are low to the ground
such as parking blocks.
– Objects that are high above the
ground such as objects hanging
from above.
– Objects that are out of range of
the center of the vehicle in the
horizontal direction.
– Objects that are not perpendicu-
lar to the ground.
– The surface of the object is
uneven or wavy.
. When reversing the vehicle, the
functions may not be able to work
properly or may cause a system
malfunction if the following condi-
tions exist.
High frequency sound from other
sources are nearby:
– Horn sound from another vehicle.
– Engine sound from other vehi-
cles.
– Sound of an air brake.
– Vehicle detection equipment or a
sonar from another vehicle.
– A sound wave with a frequency
similar to the vehicle's system is
transmitted near by.
– A vehicle equipped with the same
system is reversing toward your
reversing direction.
Reverse Automatic Braking (RAB) system
Weather conditions:
– Extremely high or extremely low
temperatures in which the area
near the sonar sensor becomes
too hot or too cold to operate.
– The sonar sensors or the rear
bumper near the sonar sensors
are exposed to heavy rain or a
significant amount of water.
– Fog, snow or sandstorm, etc.
– Air is moving rapidly such as
when a strong wind is blowing.
Parts attached to the rear bumper
near the sonar sensor:
– Commercial electronic parts (fog
light, fender pole, radio antenna)
or commercial attachment parts
(trailer hitch, bicycle carrier,
bumper guard) are attached.
– Parts that emit high frequency
sound, such as a horn or speaker,
are attached.
Vehicle conditions:
– Ice, snow or mud is adhered to
the sonar sensors or the rear
bumper near the sonar sensor.
– The vehicle is significantly in-
clined.
– The ground clearance is signifi-
cantly reduced due to the vehi-
395
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