Buick 2006 Lucerne - Manual (Page 144)

How the System Works when Backing
If the shift lever is in REVERSE (R), URPA detects
objects close to the rear bumper. The first time an object
is detected a single beep will sound. If an object is
detected at a REVERSE (R) speed between 0 mph
(0 km/h) and 5 mph (8 km/h), the following describes
what will occur based on your distance to a detected
object located behind the vehicle:
• At distances between 40 inches (1 m) and
8 ft (2.5 m), a single amber light will be lit.
• At distances between 23 inches (0.6 m) and
40 inches (1 m), both amber lights will be lit.
• At distances between 12 inches (0.3 m) and
23 inches (0.6 m), all three lights (amber/amber/red)
will be lit.
• At distances less than 12 inches (0.3 m), a beeping
sound will repeat for a short time and all three lights
(amber/amber/red) will be lit and flashing.
When the System Does Not Seem to
Work Properly
If the URPA system will not activate due to a temporary
condition, the message PARK ASSIST OFF will be
displayed on the DIC and a red light will be shown on the
rear URPA display when the shift lever is moved into
REVERSE (R). This occurs under the following conditions:
• The driver disables the system. See DIC Controls
and Displays on page 3-50.
• The parking brake pedal is depressed.
• A trailer was attached to your vehicle, or a bicycle
or an object was hanging out of your trunk during
your last drive when you turned off the vehicle.
If the attached objects are removed from your
vehicle before the start of your next drive,
the system will return to normal operation unless
an object is detected when the vehicle is shifted into
REVERSE (R). If this occurs, URPA assumes the
object is still attached, so you will have to wait until
the vehicle is driven forward above 15 mph (25 km/h)
before URPA will return to normal operation.
3-20
2006 - Buick Lucerne Owner Manual