2015 Ford Expedition EL Owner Manual Printing 1 - Page 223

222 Parking Aids The sensing system warns the driver of obstacles within a certain range of the bumper area. The system turns on automatically whenever the ignition is switched on. When receiving a detection warning, the radio volume is reduced to a predetermined level. After the warning goes away, the radio volume returns to the previous level. Using the Front and Rear Sensing System Rear Sensing System The rear sensors are only active when the transmission is in R (Reverse). As the vehicle moves closer to the obstacle, the rate of the audible warning increases. When the obstacle is fewer than 10 inches (25 centimeters) away, the warning sounds continuously. If a stationary or receding object is detected farther than 10 inches (25 centimeters) from the side of the vehicle, the tone sounds for only three seconds. Once the system detects an object approaching, the warning sounds again. A. Coverage area of up to 6 feet (2 meters) from the rear bumper (with a decreased coverage area at the outer corners of the bumper). A The system detects certain objects while the transmission is in R (Reverse): • and moving toward a stationary object at a speed of 3 mph (5 km/h) or less. • but not moving, and a moving object is approaching the rear of the vehicle at a speed of 3 mph (5 km/h) or less. • and moving at a speed of less than 3 mph (5 km/h) and a moving object is approaching the rear of the vehicle at a speed of less than 3 mph (5 km/h).