2009 Lincoln Navigator Owner's Manual - Page 272

Driving WARNING: To help avoid personal injury, please read and understand the limitations of the forward and reverse sensing system as contained in this section. Sensing is only an aid for some (generally large and fixed) objects when moving in reverse on a flat surface at "parking speeds". Traffic control systems, inclement weather, air brakes, and external motors and fans may also affect the function of the sensing system; this may include reduced performance or a false activation. WARNING: To help avoid personal injury, always use caution when in R (Reverse) and when using the sensing system. WARNING: This system is not designed to prevent contact with small or moving objects. The system is designed to provide a warning to assist the driver in detecting large stationary objects to avoid damaging the vehicle. The system may not detect smaller objects, particularly those close to the ground. WARNING: Certain add-on devices such as large trailer hitches, bike or surfboard racks and any device that may block the normal detection zone of the forward and reverse sensing system may create false beeps. The system will sound a tone to warn the driver of obstacles near either bumper in the following manner: • The front sensors will sound a high pitched tone which will appear to come from the dashboard • The rear sensors will sound a lower pitched tone which will appear to come from the rear interior of the vehicle • The sensing system will report the obstacle which is closest to the front or rear of the vehicle. For example, if an obstacle is 12 inches (30 cm) from the front of the vehicle and, at the same time, an obstacle is only six inches (15 cm) from the rear of the vehicle, the lower pitched tone will sound. The reverse sensing portion of the system will assist the driver in detecting certain objects while: • the vehicle is in R (Reverse) and moving toward a stationary object at a speed of 3 mph (5 km/h) or less. 272 2009 Navigator (nav) Owners Guide, 2nd Printing USA (fus)