2010 Jeep Grand Cherokee Owner's Manual - Page 308

STARTING AND OPERATING 307 • Seasonal temperature changes will affect tire pressure, A tire pressure monitoring sensor is located in the spare and the TPMS will monitor the actual tire pressure in wheel, if the vehicle is equipped with a matching full-size spare wheel and tire assembly. The matching full-size the tire. spare tire can be used in place of any of the four road Base System tires. A low spare tire will not cause the Tire Pressure The Tire Pressure Monitor System (TPMS) uses wireless Monitoring Telltale Light to illuminate, a warning mestechnology with wheel rim-mounted electronic sensors to sage to appear, or the chime to sound. monitor tire pressure levels. Sensors, mounted to each The Tire Pressure Monitoring Telltale Light will wheel as part of the valve stem, transmit tire pressure illuminate in the instrument cluster, a "TIRE LOW readings to the Receiver Module. PRESSURE" message will display in the instruNOTE: It is particularly important, for you to regularly ment cluster for 60 seconds, and an audible chime will be check the tire pressure in all of your tires, and to maintain activated, when one or more of the four active road tire the proper pressure. pressures are low. Should this occur, you should stop as soon as possible, check the inflation pressure of each tire The TPMS consists of the following components: on your vehicle, and inflate each tire to the vehicle's • Receiver Module recommended cold placard pressure value. The system will automatically update and the Tire Pressure Monitor• Four Tire Pressure Monitoring Sensors ing Telltale Light will extinguish, once the updated tire • Tire Pressure Monitoring Telltale Light 5