The system is not effective at speeds greater than 10 km/h (6 mph) and
may not detect certain angular or moving objects.
The system detects obstacles up to
a maximum range of six meters (20
ft.) behind 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 distance to the
obstacle is less than 45.0 cm (18
in.), the tone will sound
continuously. If the system detects
an object that is approaching the
vehicle at such as rate that rapid
braking is required, a very high rate
tone will sound. If this tone is heard
while reversing, the driver is advised
to slow down immediately until the
tone either changes to a slower rate
or stops.
While receiving a warning the radio
volume will be reduced to a predetermined level. After the warning goes
away, the radio will return to the previous volume. The radio volume may
be overridden using the radio volume control.
The extended rear park assist is automatically enabled when the gear
selector is placed in R (Reverse) and the ignition is ON. A park assist
control in the message center allows the driver to disable the extended
rear park aid only when the ignition is ON, and the gear selector is in R
(Reverse).
Always keep the sensors (located on the rear bumper/fascia) free
from snow, ice and large accumulations of dirt (do not clean the
sensors with sharp objects). These elements may cause the
system to operate inaccurately.
If the vehicle sustains damage to the rear bumper/fascia, leaving
it misaligned or bent, the sensing zone may be altered causing
inaccurate measurement of obstacles or false alarms.
2004 Navigator
(nav)
Owners Guide (post-2002-fmt)
USA English
(fus)
Driving
239
