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 (1.0 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 ash.
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 trunklevel. In order for the rear sensors to recognize an
object, it must be within operating range.
If the URPA system is not functioning properly, the
display will ash red, indicating that there is a
problem. The light will also ash red while driving if
a trailer is attached to your vehicle, or a bicycle or
object is on the back of, or hanging out of your
trunk. The light will continue to ash until the trailer
or the object is removed and your vehicle is driven
forward at least 15 mph (25 km/h).
It may also ash red if the ultrasonic sensors are
not kept clean. So be sure to keep your rear
bumper free of mud, dirt, snow, ice and slush or
materials such as paint or the system may
not work properly. If after cleaning the rear bumper
and driving forward at least 15 mph (25 km/h),
the display continues to ash red, see your dealer.
For cleaning instructions, seeWashing Your
Vehicle on page 446.
It may also ash red if your vehicle is moving in
REVERSE (R) at a speed greater than 3 mph
(5 km/h). Other conditions that may affect system
performance include things like the vibrations
from a jackhammer or the compression of
air brakes on a very large truck.
176
Your Driving, the Road, and
Your Vehicle............................................ 322
Defensive Driving...................................... 322
Drunken Driving........................................ 323
Control of a Vehicle.................................. 326
Braking...................................................... 326
Anti-Lock Brake System (ABS).................. 327
Braking in Emergencies............................. 329
Traction Control System (TCS).................. 329
Magnetic Ride Control............................... 331
Limited-Slip Rear Axle............................... 331
StabiliTrak
®System................................... 331
Steering.................................................... 333
Off-Road Recovery.................................... 335
Passing..................................................... 335
Loss of Control.......................................... 337
Racing or Other Competitive
Driving (XLR-V)...................................... 338Driving at Night......................................... 339
Driving in Rain and on Wet Roads............ 340
City Driving............................................... 343
Freeway Driving........................................ 344
Before Leaving on a Long Trip.................. 345
Highway Hypnosis..................................... 346
Hill and Mountain Roads........................... 347
Winter Driving........................................... 349
If Your Vehicle is Stuck in Sand, Mud,
Ice, or Snow.......................................... 353
Rocking Your Vehicle to Get It Out........... 354
Loading Your Vehicle................................ 354
Towing........................................................ 359
Towing Your Vehicle ................................. 359
Recreational Vehicle Towing...................... 359
Towing a Trailer........................................ 359
Section 5 Driving Your Vehicle
321