Cadillac ESCALADE EXT 2003 Manual page 165

How the System Works
URPA comes on automatically when the shift lever is
moved into REVERSE (R) and the vehicle speed is less
than 3 mph (5 km/h). When the system comes on,
the three lights on the display will illuminate to let you
know that the system is working. URPA senses
how close your vehicle is to an object. The distance is
determined by the four ultrasonic sensors located on the
rear bumper. When you shift into REVERSE (R) and
an object is detected, the following will occur in
sequence depending on the distance from the object:
At 5 feet (1.5 m) a chime will sound and one
amber light will be lit;
at 40 inches (1 .O m) both amber lights will be lit;
at 20 inches (0.5 m) a continuous chime will sound
and all three lights (amber/amber/red) will be lit; and
at 1 foot (0.3 m) a continuous chime will sound and
all three lights (amber/amber/red) will flash.
URPA can detect objects 3 inches (7.6 cm) and wider,
and at least 10 inches (25.4 cm) tall, but it cannot detect
objects that are above the center of the Cadillac crest
badge on the tailgate. In order for the rear sensors
to recognize an object,
it
must be within operating range.
Notices The URPA system will not
work
correctly
with the tailgate lowered. You could damage
your vehicle by backing into an object before URPA
detects it. Turn off the URPA system when driving
with the tailgate lowered.
If the URPA Display Flashes Red
If the URPA system is not functioning properly, the
display will flash red, indicating that there is a problem.
The light will also flash red while driving if any of the
following conditions exist:
A trailer or trailer-hitch ball mount is attached to
your vehicle.
A bicycle or object is on the back of, or hanging out
the cargo area.
If the tailgate is lowered.
If your vehicle is moving in REVERSE (R) at a
speed greater than 3 mph (5 km/h).
The light will continue to flash until the trailer or the
object is removed or the tailgate is raised and your
vehicle is driven forward at least 15 mph (25 km/h).
It may also flash red if the ultrasonic sensors are not
kept clean.
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