2012 Jeep Grand Cherokee Owner Manual - Page 508

506 STARTING AND OPERATING for 75 seconds and then remain on solid. In addition, a "SERVICE TPM SYSTEM" message will be displayed for a minimum of five seconds. For each subsequent ignition switch cycle, a chime will sound, a "SERVICE TPM SYSTEM" message will be displayed for a minimum of five seconds, and the Tire Pressure Monitoring Telltale Light will flash on and off for 75 seconds and then remain on solid. Once you repair or replace the original road tire, and reinstall it on the vehicle in place of the spare tire, the TPMS will update automatically and the Tire Pressure Monitoring Telltale Light will turn OFF, as long as no tire pressure is below the low-pressure warning limit in any of the four active road tires. The vehicle may need to be driven for up to 20 minutes above 15 mph (24 km/h) in order for the TPMS to receive this information. Premium System - If Equipped The Tire Pressure Monitor System (TPMS) uses wireless technology with wheel rim-mounted electronic sensors to monitor tire pressure levels. Sensors, mounted to each wheel as part of the valve stem, transmit tire pressure readings to the Receiver Module. NOTE: It is particularly important, for you to regularly check the tire pressure in all of your tires and to maintain the proper pressure. The Tire Pressure Monitor System (TPMS) consists of the following components: • Receiver Module • Four Tire Pressure Monitoring Sensors • Various Tire Pressure Monitoring System Messages, which display in the Electronic Vehicle Information Center (EVIC), and a graphic displaying tire pressures