2010 Jeep Grand Cherokee Owner's Manual - Page 314

STARTING AND OPERATING 313 case, the CHECK TPM SYSTEM message is then followed by a graphic display, with pressure values still shown. This indicates the pressure values are still being received from the TPM Sensors. However, the system still needs to be serviced as long as the CHECK TPM SYSTEM message exists. NOTE: • If your vehicle is equipped with a matching full-size spare wheel and tire assembly, it has a tire pressure monitoring sensor, and can be monitored by the Tire Pressure Monitoring System (TPMS). In the event that the matching full-size spare tire is swapped with a low pressure road tire, the next ignition switch cycle will still show the Tire Pressure Monitoring Telltale Light to be ON, a chime to sound, a Low Pressure message to appear in the EVIC, and the graphic display will still show the low tire pressure value "flashing." Driving the vehicle for up to 20 minutes above 15 mph (24 km/h) will turn OFF the Tire Pressure Monitoring Telltale Light as long as none of road tires are below the low pressure warning threshold. The EVIC will also display a "SPARE LOW PRESSURE" message, and the graphic display will show a tire pressure value in place of the "flashing" low tire pressure value. • If your vehicle is not equipped with a matching full-size spare wheel and tire assembly, it does not have a tire pressure monitoring sensor in the spare tire. The TPMS will not be able to monitor the tire pressure. If you install the spare tire in place of a road tire that has a pressure below the low-pressure warning limit, upon the next ignition switch cycle, the Tire Pressure Monitoring Telltale Light will remain ON, a chime will sound, and the EVIC will still display a "flashing" pressure value in the graphic display. After driving the vehicle for up to 20 minutes above 15 mph (24 km/h), the Tire Pressure Monitoring Telltale Light will flash on and off for 75 seconds and then remain on solid. In addition, the EVIC will display a "CHECK TPM 5