2015 Jeep Cherokee Owner Manual - Page 542

540 STARTING AND OPERATING a chime will sound when tire pressure is low in one or more of the four active road tires. Should this occur, you should stop as soon as possible, check the inflation pressure of each tire on your vehicle, and inflate each tire to the vehicle's recommended cold placard pressure value as shown in the ЉInflate to XXЉ message. Once the system receives the updated tire pressures, the system will automatically update and the "Tire Pressure Monitoring Telltale Light" will turn off. 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. Service TPMS Warning "Tire Pressure Monitoring Telltale Light" will turn off when the fault condition no longer exists. A system fault can occur due to any of the following: 1. Jamming due to electronic devices or driving next to facilities emitting the same radio frequencies as the TPMS sensors. 2. Installing some form of aftermarket window tinting that affects radio wave signals. 3. Lots of snow or ice around the wheels or wheel housings. 4. Using tire chains on the vehicle. 5. Using wheels/tires not equipped with TPMS sensors. When a system fault is detected, the "Tire Pressure Monitoring Telltale Light" will flash on and off for 75 Vehicles With Matching Full-Size Spare seconds and then remain on solid. The system fault will also sound a chime. If the ignition is cycled, this sequence 1. The matching full-size spare wheel and tire assembly has a tire pressure monitoring sensor that can be will repeat, providing the system fault still exists. The monitored by the TPMS.