Sirius Satellite Radio Super Duty F-450 - Manual (Page 21)

Tire Pressure Monitoring System (TPMS)
PERFORMANCE/HANDLING
This page is about:
2008 F-250/F-350/F-450
Super Duty ® Pickups
Performance/Handling
July 2007
F-250/F-350/F-450
SD Pickups
21
Tire Pressure Monitoring System (TPMS)
• TPMS uses a tire pressure sensor mounted to a metal band and banded in the
wheel’s drop well
• Sensors use radio frequency transmitters to send tire pressure information to the
vehicle’s onboard computer
• The computer illuminates a warning light and sounds an audible tone when tire
pressure is significantly low
• System is completely hidden from sight and uses a standard rubber valve stem
• Can be used on steel or aluminum wheels
• Replacing the tire can be easily done without removing the sensor
• TPMS provides a more accurate tire pressure reading because it measures actual
tire pressure as opposed to wheel speed like the Low Tire Warning System
• Senses temperature-based pressure loss where all four wheels are affected
• Resetting the system is easy. Once tire pressure has been restored to its recommended
level, TPMS-equipped vehicles simply need to be driven over 20 mph for at least
2 minutes to be reset
• Standard on SRW units built on or after 7/30/07
ENGINEERING INSIGHT: TPMS WARNING LIGHT
Low Tire Warning Light
Solid
Warning
Light
Flashing
Warning
Light
ENGINEERING INSIGHT: TPMS Warning Light
Customer Action Required
Check tire pressure to ensure proper inflation. Ford recommends a digital or dial-type
tire pressure gauge for increased accuracy.
• After inflating cold tires to manufacturer’s recommended pressure as shown on
the tire label, the vehicle must be driven for at least 2 minutes at over 20 mph to
turn the light off and reset the system
• If the light remains on even after these steps have been taken, have the system
inspected by the dealership Service Department
NOTE: If the outside overnight temperature is significantly lower than the daytime
temperature, tire pressure may decrease 1 psi for every 10 degrees F in temperature
change. This may cause the TPMS warning to illuminate. If all tires appear to be
inflated, customers should manually check the pressure and inflate all the tires to the
recommended cold pressure.
• Driving on the spare tire may activate the TPMS warning light, causing it to flash for
75 seconds followed by a solid light. Repair the damaged road wheel and remount
it on the vehicle. Reset the TPMS by driving at over 20 mph for at least 2 minutes
• If the tires are inflated to the manufacturer’s recommended pressure and the spare
tire is not in use, have the system inspected by the Service Department
• See the vehicle Owner‘s Guide for more information
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