2004 Jeep Grand Cherokee Owner's Manual - Page 218

218 STARTING AND OPERATING gauge. There will be a delay between the instant you adjust the air pressure in a tire and when the system updates the display. The TPM system is not intended to provide you with notification of rapid air loss. The following chart indicates the TPM system pressure levels. A threshold is the level at which the TPM system provides you with an indication. High Pressure Threshold Placard Pressure (Cold) Low Pressure Threshold 45 psi (310 kPa ) 33 psi (227 kPa) 25 psi (172 kPa) CAUTION! The TPM system has been optimized for the original equipment tires and wheels. TPM system pressures have been established for the tire size equipped on your vehicle. Undesirable operation or sensor damage may result when using replacement equipment that is not of the same size, type, and/or style. Aftermarket wheels can cause sensor damage. Do not use tire sealant or balance beads if your vehicle is equipped with TPM system as damage to the sensors may result. Tire Pressure Monitor System Tire/Wheel Rotation and Sensor Replacement - If Equipped With the 5 Tire TPM System, if a road tire and wheel is replaced by the spare, the TPM system will detect the swap automatically (after the ignition has been cycled) NOTE: A TPM system does not replace normal tire maintenance.