2009 Jeep Grand Cherokee Owner's Manual - Page 317

STARTING AND OPERATING 315 NOTE: Anytime the ESP system is in the "Full Off" mode, ERM is disabled. Refer to ESP (Electronic Stability Program) for a complete explanation of the available ESP modes. ESP (Electronic Stability Program) This system enhances directional control and stability of the vehicle under various driving conditions. ESP corrects for oversteering or understeering of the vehicle by applying the brake of the appropriate wheel to assist in counteracting the oversteer or understeer condition. Engine power may also be reduced to help the vehicle maintain the desired path. ESP uses sensors in the vehicle to determine the vehicle path intended by the driver and compares it to the actual path of the vehicle. When the actual path does not match the intended path, ESP applies the brake of the appropriate wheel to assist in counteracting the oversteer or understeer condition. • Oversteer - when the vehicle is turning more than appropriate for the steering wheel position. WARNING! Many factors, such as vehicle loading, road conditions and driving conditions, influence the chance that wheel lift or rollover may occur. ERM cannot prevent all wheel lift or rollovers, especially those that involve leaving the roadway or striking objects or other vehicles. Only a safe, attentive, and skillful driver can prevent accidents. The capabilities of an ERM-equipped vehicle must never be exploited in a reckless or dangerous manner which could jeopardize the user's safety or the safety of others. 5