2011 Chevrolet Cruze Owner's Manual - Page 234

9-38 Driving and Operating To be detected, objects must be at least 20 cm (8 in) off the ground and below trunk level. Objects must also be within 2.5 m (8 ft) from the rear bumper. The distance objects can be detected may be less during warmer or humid weather. PARK ASSIST OFF may display on the Driver Information Center (DIC) to indicate that URPA is off. The message disappears after a short period of time. How the System Works URPA comes on automatically when the shift lever is moved into R (Reverse). A single tone sounds to indicate the system is working. URPA operates only at speeds less than 8 km/h (5 mph). An obstacle is indicated by audible beeps. The interval between the beeps becomes shorter as the vehicle gets closer to the obstacle. When the distance is less than 30 cm (12 in) the beeps are continuous. When the System Does Not Seem to Work Properly If the URPA system does not activate due to a temporary condition, the message PARK ASSIST OFF displays on the DIC. See Object Detection System Messages on page 5‑30 for more information. This can occur under the following conditions: . The driver has disabled the system. The ultrasonic sensors are not clean. Keep the vehicle's rear bumper free of mud, dirt, snow, ice, and slush. For cleaning instructions, see Exterior Care on page 10‑83. Turning the System On and Off The URPA system can be turned on and off through the vehicle personalization menu on the infotainment system. See Vehicle Personalization on page 5‑33 for more information. .