2008 Ford F150 Owner Guide 1st Printing - Page 234

Tires, Wheels and Loading illuminate while the tool is active. The horn will sound once within 10 seconds to indicate the process was successful. Note: If a double horn chirp is heard, repeat the procedure. If a single horn chirp is not heard, move the vehicle to rotate the wheels at least a 1⁄4-turn and repeat the procedure. If the horn does not sound while attempting to reset any wheel, seek service from your authorized dealer. 3. Perform Steps 1 and 2 on the right front, right rear and finally the left rear tires. Successful completion of the reset procedure can be verified by turning the ignition to OFF without the horn sounding. If two short beeps are heard, the reset procedure was unsuccessful and must be repeated. If after repeating the procedure two short beeps are heard when the key is turned to OFF, seek assistance from your authorized dealer. Rotation, pressure adjustment and TPMS reset example The following example describes all the major steps involved in rotating tires on a vehicle with different front and rear tire pressures. It illustrates that the TPMS reset procedure needs to follow tire rotation and pressure adjustment to avoid a possible false low tire warning. Example: A particular vehicle has the following recommended tire pressures: 50 psi (345 kPa) front; 80 psi (552 kPa) rear. Note: For your vehicle's pressure, refer to the Safety Compliance Certification Label located on the B-Pillar or the edge of your vehicle's driver's door. Before tire rotation Sensor 1: 50 psi Sensor 2: 50 psi Sensor 3: 80 psi Sensor 4: 80 psi 234 2008 F-150 (f12) Owners Guide (post-2002-fmt) USA (fus)