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outer corners of the bumper. As you move closer to the obstacle, the rate
of the tone increases. When the distance to the obstacle is approximately
less than 18 inches (45.0 cm), the tone will sound continuously. If the
system detects an object that is approaching the vehicle at such a 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.
Audible Warnings
Distance to Object Warning
Speed above 2.5 mph (4 km/h)
up to 1.6 feet (.5 meters) Solid
1.6 feet (.5 meters) to 3.1 feet (1 meter) Fast beep
3.1 feet (1 meter) to 5.7 feet (1.8 meters) Medium/fast beep
5.7 feet (1.8 meters) to 9 feet (2.8 meters) Medium beep
9 feet (2.8 meters) to 13 feet (4 meters) Medium/slow beep
13 feet (4 meters) to 19.6 feet (6 meters) Slow beep
Speed below 2.5 mph (4 km/h)
up to 1.4 feet (.4 meters) Solid
1.4 feet (.4 meters) to 3 feet (.9 meters) Fast beep
3 feet (.9 meters) to 4.5 feet (1.4 meters) Medium beep
4.5 feet (1.4 meters) to 6.3 feet (1.9 meters) Medium/slow beep
6.3 feet (1.9 meters) to 8.7 feet (2.6 meters) Slow beep
8.7 feet (2.6 meters) to 16.4 feet (5 meters) No sound
The reverse sensing system is automatically enabled when the gear
selector is placed in R (Reverse) and the ignition is ON. A control in the
message center allows the driver to disable the system only when the
ignition is ON and the gear selector is in R (Reverse). Refer to Message
center in the Driver Controls chapter.
The message center will indicate the system is OFF and will not allow
the driver to switch the system ON to indicate a failure of the reverse
sensing system.
The radar sensor is located behind the rear bumper/fascia. Always
keep the rear bumper/fascia free from snow, ice and large
accumulations of dirt. 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.
2007 Navigator (nav)
Owners Guide (post-2002-fmt)
USA (fus)
Driving
211
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