Chevrolet Volt 2013 Owner's Manual page 227

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 (If
Equipped)
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.
However, if an object comes within
0.3 m (1 ft) of the front bumper while
the vehicle is backing up and at the
same time there is another object
further than 0.3 m (1 ft) from the rear
bumper, then the beeps only sound
to indicate the object that is closer
to the front bumper.
Turning the System On and Off
The system can be turned on and
off by pressing the park assist
button located in the overhead
console.
The indicator light next to the park
assist button lights up when the
system is on and turns off when it
has been disabled.
When the system is off, PARK
ASSIST OFF displays on the Driver
Information Center (DIC). The
message disappears after a short
period of time.
The system defaults to the on
setting each time the vehicle is
started.
Driving and Operating
When the System Does Not
Seem to Work Properly
The following messages may be
displayed on the DIC:
SERVICE PARKING ASSIST: If
this message occurs, check the
following conditions:
The ultrasonic sensors are not
clean. Keep the vehicle's
bumpers free of mud, dirt, snow,
ice, and slush. For cleaning
instructions, see Exterior Care
on page 10 77.
The park assist sensors are
covered by frost or ice. Frost or
ice can form around and behind
the sensors and may not always
be seen; this can occur after
washing the vehicle in cold
weather. The message may not
clear until the frost or ice has
melted.
If the above conditions do not exist,
take the vehicle to your dealer to
repair the system.
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