Ford 2005 Freestyle Owner's Manual page 201

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 RSS system may create false beeps.
The RSS detects obstacles up to six
feet (two meters) from the rear
bumper with a decreased coverage
area at the outer corners of the
bumper, (refer to the figures 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
(25.0 cm) away, the tone will sound
continuously. If the RSS detects a
stationary or receding object further
than 10 inches (25.0 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.
The RSS automatically turns on
when the gear selector is placed in
R (Reverse) and the ignition is ON.
An RSS control on the instrument
panel allows the driver to turn the
RSS on and off. To turn the RSS off,
the ignition must be ON, and the gear selector in R (Reverse). An
indicator light on the control will illuminate when the system is turned
off. If the indicator light illuminates when the RSS is not turned off, it
may indicate a failure in the RSS.
Keep the RSS sensors (located on the rear bumper/fascia) free
from snow, ice and large accumulations of dirt (do not clean the
sensors with sharp objects). If the sensors are covered, it will
affect the accuracy of the RSS.
2005 Freestyle (219)
Owners Guide (post-2002-fmt)
USA (fus)
Driving
201