2012 Jeep Grand Cherokee Owner Manual - Page 506

504 STARTING AND OPERATING • The TPMS is not a substitute for proper tire maintenance, and it is the driver's responsibility to maintain correct tire pressure using an accurate tire gauge, even if under-inflation has not reached the level to trigger illumination of the Tire Pressure Monitoring Telltale Light. The TPMS consists of the following components: • Receiver Module • Four Tire Pressure Monitoring Sensors • Tire Pressure Monitoring Telltale Light A low spare tire will not cause the Tire Pressure Moni• Seasonal temperature changes will affect tire pressure, toring Telltale Light to illuminate, a warning message to and the TPMS will monitor the actual tire pressure in appear, or the chime to sound. the tire. The Tire Pressure Monitoring Telltale Light will Base System illuminate in the instrument cluster, a "LOW TIRE The Tire Pressure Monitor System (TPMS) uses wireless PRESSURE" message will display in the instrutechnology with wheel rim-mounted electronic sensors to ment cluster for 5 seconds, and an audible chime will be monitor tire pressure levels. Sensors, mounted to each activated, when one or more of the four active road tire wheel as part of the valve stem, transmit tire pressure pressures are low. Should this occur, you should stop as readings to the Receiver Module. soon as possible, check the inflation pressure of each tire NOTE: It is particularly important, for you to regularly on your vehicle, and inflate each tire to the vehicle's check the tire pressure in all of your tires, and to maintain recommended cold placard pressure value. The system the proper pressure.