Chevrolet 2012 Volt Owner's Manual page 265

WARNING
The Ultrasonic Front and Rear
Parking Assist (UFRPA) system
does not replace driver vision.
It cannot detect:
Objects that are below the
bumper, under the vehicle,
or too close or far from the
vehicle.
Children, pedestrians,
bicyclists, or pets.
If you do not use proper care
before moving forward and while
backing up, vehicle damage,
injury, or death could occur. Even
with UFRPA, always check in
front of the vehicle before moving
forward and behind the vehicle
before backing up. While moving
forward and backing up, be sure
to look for objects and check the
vehicle mirrors.
How the System Works
When the vehicle is shifted into
R (Reverse) the front and rear
sensors are automatically turned on.
After the vehicle is shifted out of
R (Reverse), the rear sensors are
turned off and the front sensors
stay on until the vehicle is above a
speed of 8 km/h (5 mph). For the
front park assist system to be
active again without shifting into
R (Reverse), the park assist button
in the overhead console must be
pressed. See Turning the System
On and Off later in this section.
UFRPA operates only at speeds
less than 8 km/h (5 mph).
When the vehicle is in N (Neutral),
the system may be active. If the
vehicle is in a car wash, the sensors
may detect objects in the car wash.
See Turning the System On and
Off later in this section to turn the
system off.
I n f o r ma t i o n P r o v i d e d b y :
Driving and Operating
High-toned beeps from the front
speakers are for objects detected
near the front bumper. Low-toned
beeps from the rear speakers are
for objects detected near the rear
bumper. The interval between the
beeps becomes shorter as the
vehicle gets closer to the obstacle.
When the distance is less than
30 cm (12 in) the beeping is a
continuous tone for five seconds.
To be detected, objects must be at
least 25 cm (10 in) off the ground
and below hatch level. Objects must
also be within 1.2 m (4 ft) in front of
the vehicle and 2.5 m (8 ft) from the
rear bumper. This distance may be
less during warmer or humid
weather.
Objects Detected by Both the
Front and Rear Sensors
In general, if objects are detected at
the same time near both the front
and rear bumpers while backing up,
the beeps only sound to indicate
that objects are close to the rear
bumper.
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