2004 Ford Freestar Owner's Manual - Page 178

Driving are allowed to spin. If your vehicle seems to lose engine power while driving in deep sand or very deep snow, switching off the AdvanceTrac stability enhancement feature will restore full engine power and will enhance momentum through the obstacle. 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 TRAC ACTIVE indicator light will illuminate • 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. If the AdvaceTrac system is activated for an extended period of time, the brake portion of the system will shut down to allow the brakes to cool down. A limited AdvanceTrac function using only engine power reduction will still help control the wheels from over-spinning. When the brakes have cooled down, the system will again function normally. Anti-lock braking is not affected by this condition and will function normally during the cool-down period. 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. 178 2004 Freestar (win) Owners Guide (post-2002-fmt) USA English (fus)