2003 Lincoln Navigator Owner Guide 1st Printing (Spanish) - Page 622

Driving Some drivers may notice a slight movement of the brake pedal when the AdvanceTrac௢ performs a system self-check. During AdvanceTrac௢ operation you may experience the following: • A rumble or grinding noise • A slight deceleration of the vehicle • The AdvanceTrac௢ indicator light will flash • If your foot is on the brake pedal, you will feel a vibration in the pedal. • If the driving condition is severe and your foot is not on the brake, the brake pedal will move to apply higher brake forces. You may also hear a whoosh of air from under the instrument panel during this severe condition. All these conditions are normal during AdvanceTrac௢ operation. Do not alter or modify your vehicle's suspension or steering; the resulting changes to the vehicle's handling can adversely affect the AdvanceTrac௢ system. Also, do not install a stereo loudspeaker near the front center console or under either front seat. The speaker vibrations can adversely affect the AdvanceTrac௢ sensors located in this area. Aggressive driving in any road conditions can cause you to lose control of your vehicle increasing the risk of severe personal injury or property damage. The occurrence of an AdvanceTrac௢ event is an indication that at least some of the tires have exceeded their ability to grip the road; this may lead to an increased risk of loss of vehicle control, vehicle rollover, personal injury and death. If you experience a severe road event, SLOW DOWN. 231