2008 Jeep Grand Cherokee Owner's Manual - Page 332

332 STARTING AND OPERATING The Tire Pressure Monitor System (TPMS) consists of the following components: • Receiver Module • 4 Tire Pressure Monitoring Sensors • 3 Trigger Modules (mounted in three of the four wheel wells) • Various Tire Pressure Monitoring System Messages, which display in the Electronic Vehicle Information Center (EVIC), and a graphic displaying tire pressures • Tire Pressure Monitoring Telltale Light A tire pressure monitoring sensor is located in the spare wheel if the vehicle is equipped with a matching full size spare wheel and tire assembly. The matching full size spare tire can be used in place of any of the four road tires. A low spare tire will set the "SPARE LOW PRESSURE" textual message, but it will not cause the "Tire Pressure Monitoring Telltale Light" to illuminate or the chime to sound. Tire Pressure Monitoring Low Pressure Warnings The "Tire Pressure Monitoring Telltale Light" will illuminate in the instrument cluster, and an audible chime will be activated when one or more of the four active road tire pressures are low. In addition, the Electronic Vehicle Information Center (EVIC) will display one or more Low Pressure messages (Left Front, Left Rear, Right Front, Right Rear) for 3 seconds, and a graphic display of the pressure value(s) with the low tire(s) flashing. Refer to "Electronic Vehicle Information Center (EVIC)" in Section 4 of this manual. NOTE: Your system can be set to display pressure units in PSI, kPa, or BAR.