Tire Pressure Monitor (TPM) System

The Tire Pressure Monitor (TPM) system monitors the air pressure in the 4 road tires with wheel-mounted tire pressure sensors. The sensors transmit radio frequency signals to the Smart junction Box (SJB) approximately every 60 seconds when the vehicle speed exceeds 20 mph (32 km/h). If vehicle is stationary for more than 30 minutes, the sensor will enter into a "sleep mode" and stop transmitting.

Each tire pressure sensor transmission is compared against a low-pressure limit (pressure listed on vehicle certification label minus 25 percent, which will be about 6-9 psi). If it is determined that the tire pressure has fallen below this limit, the SJB sends a message to the instrument cluster, which then illuminates the low pressure warning indicator and displays the appropriate message(s) in the message center (if equipped).

All tire pressure sensors are battery-operated.

The sensors are attached to the portion of the valve stem located inside the wheel with a T10 Torx screw.

Under the following conditions, the TPM system may not function properly:

• Low tire pressure.
• Tire pressure sensor is missing or damaged.
• Spare tire is installed as a road wheel.
• Incorrect tire pressure sensor is installed.
• Tire pressure sensor installed incorrectly.
• Non-OEM wheels installed (aftermarket rims).
• Non-OEM equipped run-flat tires installed.
• Other non-OEM modifications (roll cages, service barriers, part racks, ladder racks, etc.)