2010 Jeep Grand Cherokee Owner's Manual - Page 280

STARTING AND OPERATING 279 period of time after the driver takes their foot off of the HSA will work in REVERSE and all forward gears when brake pedal. If the driver does not apply the throttle the activation criteria have been met. The system will not during this short period of time, the system will release activate if the vehicle is placed in NEUTRAL or PARK. brake pressure and the vehicle will roll down the hill. The WARNING! system will release brake pressure in proportion to the amount of throttle applied as the vehicle starts to move in There may be situations on minor hills (i.e., less than the intended direction of travel. 8%), with a loaded vehicle, or while pulling a trailer, HSA Activation Criteria when the system will not activate and slight rolling The following criteria must be met in order for HSA to may occur. This could cause a collision with another activate: vehicle or object. Always remember the driver is responsible for braking the vehicle. • Vehicle must be stopped. • Vehicle must be on a 8% grade or greater hill. Towing with HSA HSA will provide assistance when starting on a grade • Gear selection matches vehicle uphill direction (i.e., when pulling a trailer. vehicle facing uphill is in forward gear; vehicle backing uphill is in REVERSE gear). 5