2007 Cadillac DTS Owner's Manual - Page 200

When the System Does Not Seem to Work Properly If the UFRPA system will not activate due to a temporary condition, the message PARKING ASSIST OFF will be displayed on the DIC and a red light will be shown on the rear UFRPA 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 233. • 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 out of park. If this occurs, you will have to wait until the vehicle is driven forward above 15 mph (25 km/h) before UFRPA will return to normal operation. • A bicycle or an object is attached to the front bumper during your last drive when you turned off the vehicle. If the attached objects are removed from your vehicle before the start of 200 your next drive, the system will return to normal unless an object is detected when the vehicle is shifted out of park. If this occurs, UFRPA will return to normal operation when the vehicle is driven forward above 15 mph (25 km/h). • The ultrasonic sensors are not kept clean. So be sure to keep your vehicle's front and rear bumpers free of mud, dirt, snow, ice and slush. For cleaning instructions, see Washing Your Vehicle on page 435. If after cleaning the front and rear bumpers and driving forward at a speed of at least 15 mph (25 km/h), the DIC displays the PARKING ASSIST OFF message, see your dealer. • Other conditions that may affect system performance include vibrations from a jackhammer or the compression of air brakes on a very large truck or other mechanical devices that interfere with UFRPA performance. • When UFRPA is disabled without driver action and the driver attempts to turn UFRPA back on using the Driver Information Center (DIC), the PARKING ASSIST ON option will not be selectable if the necessary conditions stated above for normal system operation are not met.