2006 Ford Expedition Owner Guide 2nd Printing (Spanish) - Page 660

Driving STEERING Your vehicle is equipped with power steering. Power steering uses energy from the engine to decrease the driver's effort in steering the vehicle. To prevent damage to the power steering pump: • Never hold the steering wheel to the extreme right or the extreme left for more than a few seconds when the engine is running. • Do not operate the vehicle with the power steering pump fluid level below the MIN mark on the reservoir. If the power steering system breaks down (or if the engine is turned off), you can steer the vehicle manually, but it takes more effort. If the steering wanders or pulls, check for: • Underinflated tire(s) on any wheel(s) • Uneven vehicle loading • High crown in center of road • High crosswinds • Wheels out of alignment • Loose or worn suspension components AIR SUSPENSION SYSTEM (IF EQUIPPED) The air suspension system is designed to improve ride comfort, vehicle handling and general vehicle performance by adjusting the vehicle's ride height according to vehicle speed, weight added to or removed from the vehicle and four-wheel drive (if equipped) operation. Normal vehicle operation does not require any action by the driver. When you enter the vehicle and the ignition is off, the air suspension will have automatically lowered the vehicle to its lowest height to provide easier entry. When a door or the liftgate is opened, the system memorizes and maintains that height until either all doors are closed or the vehicle's speed exceeds 15 mph (24 km/h). The air suspension system will then raise the vehicle's height to its normal position when the ignition is turned on, all doors are closed and the transmission is shifted from P (Park). When the vehicle is in motion, the air suspension will adjust the vehicle ride height to normal operating position to maximize your ride comfort. If your vehicle is equipped with four-wheel drive and you shift into 4WD LOW, the air suspension will not move to it's lowest position; instead, the ride height is raised above the normal ride height position (at speeds below 35 mph [56 km/h]) to improve ground clearance. 252 2006 Expedition (exd) Owners Guide (post-2002-fmt) USA (fus)