FORD 2013 Focus Electric - Manual (Page 270)

WARNING: This system is not designed to prevent contact with
small or moving objects. The system is designed to provide a
warning to assist the driver in detecting large stationary objects to
avoid damaging the vehicle. The system may not detect smaller objects,
particularly those close to the ground.
WARNING: Certain add-on devices such as large trailer hitches,
bike or surfboard racks and any device that may block the normal
detection zone of the forward and reverse sensing system may create
false beeps.
The system detects obstacles up to
6 ft (2 m) from the rear bumper
with a decreased coverage area at
the outer corners of the bumper,
(refer to the illustration for
approximate zone coverage areas).
As you move closer to the obstacle,
the rate of the tone increases. When
the obstacle is less than 10 inches
(25 cm) away, the tone will sound
continuously. If the system detects a
stationary or receding object further
than 10 inches (25 cm) from the
side of the vehicle, the tone will
sound for only three seconds. Once
the system detects an object
approaching, the tone will sound
again.
While receiving a detection warning, the radio volume will be reduced to
a predetermined level. After the warning goes away, the radio will return
to the previous value.
The system is automatically turns on when the gearshift lever is placed
in R (Reverse) and the ignition is on. A control in the message center
allows the driver to disable the system. Refer to Message center in the
Instrument Cluster chapter for more information.
270 Driving
2013 Focus Electric Vehicle (fob)
Owners Guide gf, 1st Printing
USA (fus)