2008 Jeep Grand Cherokee Owner's Manual - Page 147

UNDERSTANDING THE FEATURES OF YOUR VEHICLE 147 swaying. Always use caution when towing a trailer and follow the tongue weight recommendations. Refer to "Trailer Towing" in Section 5 of this manual for more information on towing a trailer with your vehicle. When TSC is functioning, the "ESP/TCS Indicator Light" will flash, the engine power may be reduced and you may feel the brakes being applied to individual wheels to attempt to stop the trailer from swaying. TSC is disabled when the ESP system is in the Partial Off or Full Off modes. WARNING! If TSC activates while driving, slow the vehicle down, stop at the nearest safe location, and adjust the trailer load to eliminate trailer sway. HSA (Hill Start Assist) (4WD Models with NV245 Two-Speed Transfer Case Only) The HSA system is designed to assist the driver when starting a vehicle from a stop on a hill. HSA will maintain the level of brake pressure the driver applied for a short period of time after the driver takes their foot off of the brake pedal. If the driver does not apply the throttle during this short period of time, the system will release brake pressure and the vehicle will roll down the hill. The system will release brake pressure in proportion to amount of throttle applied as the vehicle starts to move in the intended direction of travel. HSA Activation Criteria The following criteria must be met in order for HSA to activate: • Vehicle must be stopped. • Vehicle must be on a 8% grade or greater hill. 3