2007 Jeep Grand Cherokee Owner's Manual - Page 304

304 STARTING AND OPERATING Telltale Light" will be OFF as long as no road tire(s) are below the low pressure warning threshold. The vehicle may need to be driven for up to 10 minutes above 15 mph (24 km/h) to receive this information. CAUTION! After inspecting or adjusting the tire pressure always reinstall the valve stem cap. This will prevent moisture and dirt from entering the valve stem, which could damage the Tire Pressure Monitoring Sensor. NOTE: • The TPMS is not intended to replace normal tire care and maintenance, nor to provide warning of a tire failure or condition. • The TPMS should not be used as a tire pressure gauge while adjusting your tire pressure. • Driving on a significantly under-inflated tire causes the tire to overheat and can lead to tire failure. CAUTION! The TPMS has been optimized for the original equipment tires and wheels. TPMS pressures have been established for the tire size equipped on your vehicle. Undesirable system operation or sensor damage may result when using replacement equipment that is not of the same size, type, and/or style. After-market wheels can cause sensor damage. Do not use tire sealant from a can, or balance beads if your vehicle is equipped with a TPMS, as damage to the sensors may result.