2006 Lincoln Navigator Owner Guide 2nd Printing - Page 251

Tires, Wheels and Loading Changing tires with TPMS It is recommended that you always have your tires serviced by an authorized dealer. Each road tire is equipped with a tire pressure sensor mounted on the wheel inside the tire connected to the valve stem. The tire pressure sensor must be unbolted from the wheel prior to tire removal. The sensor can be removed by loosening the nut at the valve stem. Failure to remove the sensor may damage it. The rubber grommet (washer) between the wheel and the tire pressure sensor needs to be replaced whenever the sensor is removed to minimize air leaks. The tire pressure should be checked periodically (at least monthly) using an accurate tire gauge, refer to Inflating your tires in this chapter. When replacing valve caps, use the same nylon valve caps that came with your vehicle. Do not use chrome-plated valve caps because they may corrode to the valve stems and damage the TPMS sensors. Understanding your Tire Pressure Monitoring System (TPMS) The Tire Pressure Monitoring System measures pressure in your four road tires and sends the tire pressure readings to your vehicle every minute while you are driving and once an hour when your vehicle is parked. The Low Tire Warning Lamp will turn ON if the tire pressure is 25% below the pressure listed on the Safety Compliance Certification Label (approximately 6 to 9 psi below the manufacturer's recommend tire pressure). If the tire pressure increases 2 psi above the "Light ON" threshold, then the TPMS light will turn OFF. Once the light is illuminated, your tires are under inflated and need to be inflated to the manufacturer's recommended tire pressure. Even if the light turns ON and a short time later turns OFF, your tire pressure still needs to be checked. In short, once the light has turned ON, at least one tire may be under inflated. 251 2006 Navigator (nav) Owners Guide (post-2002-fmt) USA (fus)