2010 Jeep Grand Cherokee Owner's Manual - Page 309

308 STARTING AND OPERATING pressures have been received. The vehicle may need to be 3. Lots of snow or ice around the wheels or wheel driven for up to 20 minutes above 15 mph (24 km/h) to housings. receive this information. 4. Using tire chains on the vehicle. The Tire Pressure Monitoring Telltale Light will flash on 5. Using wheels/tires not equipped with TPM sensors. and off for 75 seconds, and remain on solid when a system fault is detected. In addition, a "CHECK TPM NOTE: SYSTEM" message will be displayed for 75 seconds when • If your vehicle is equipped with a matching full-size spare wheel and tire assembly, it has a tire pressure a system fault is detected, and a chime will sound. If the monitoring sensor, and can be monitored by the Tire ignition switch is cycled, this sequence will repeat, proPressure Monitoring System (TPMS). In the event that viding the system fault still exists. The Tire Pressure the matching full-size spare tire is swapped with a low Monitoring Telltale Light will turn off when the fault pressure road tire, the next ignition switch cycle will condition no longer exists. A system fault can occur by still show the Tire Pressure Monitoring Telltale Light any of the following: to be ON, a "TIRE LOW PRESSURE" message will be 1. Jamming due to electronic devices or driving next to displayed in the instrument cluster for 60 seconds, and facilities emitting the same Radio Frequencies as the TPM a chime to sound. Driving the vehicle for up to sensors. 20 minutes above 15 mph (24 km/h) will turn OFF the 2. Installing some form of aftermarket window tinting that affects radio wave signals.