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The reverse sensing portion of 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
(25.0 cm) away, the tone will sound
continuously. If the system 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.
While receiving a rear 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.
WARNING: To help avoid personal injury, please read and
understand the limitations of the forward and reverse sensing
system as contained in this section. Sensing is only an aid for some
(generally large and fixed) objects when moving in reverse on a flat
surface at “parking speeds”. Traffic control systems, inclement weather,
air brakes, and external motors and fans may also affect the function of
the sensing system; this may include reduced performance or a false
activation.
WARNING: To help avoid personal injury, always use caution
when in R (Reverse) and when using the sensing system.
Driving
239
2011 Navigator (nav)
Owners Guide, 1st Printing
USA (fus)