How The System Works - Buick Automobile User Manual

How the System Works

URPA comes on automatically when the shift lever is
moved into REVERSE (R). The rear display will
then briefly illuminate to let you know the system is
working.
URPA operates only at speeds less than 3 mph
(5 km/h). If you are above this speed, the red light on
the rear display will flash.
To be detected, objects must be at least 10 inches
(25.4 cm) off the ground and below trunk level. Objects
must also be within 5 feet (1.5 m) from your rear
bumper. This distance may be less during warmer or
humid weather.
A single beep will sound the first time an object is
detected between 20 inches (0.5 m) and 5 feet (1.5 m)
away. Repeated beeping will occur when you are
closer than 20 inches (0.5 m) from the object.
2-42
The following describes what will occur with the URPA
display as you get closer to a detected object:
Description
amber light
amber/amber lights
amber/amber/red
lights/continuous beep
amber/amber/red
lights flashing and
continuous beep
When the System Does Not Seem to
Work Properly
•
The ultrasonic sensors are not clean, a red URPA
display light may illuminate when the vehicle is in
REVERSE (R). Keep your rear bumper free of mud,
dirt, snow, ice and slush. For cleaning instructions,
see Washing Your Vehicle on page 5-102.
English Metric
5 ft 1.5 m
40 in 1.0 m
20 in 0.5 m
1 ft 0.3 m