2007 Ford F250 Special Off-Road Package Supplement 1st Printing - Page 27

Tires, Wheels and Loading Tire pressure maintenance The CTIS is set to check tire pressure every 15 minutes. The wheel valves will automatically isolate the tires from the rest of the system; this prevents a decrease in tire pressure due to fitting and seal leaks. Some clicking may be heard as the system activates to achieve a new tire pressure. Adequate supply system air pressure is required to begin or continue any pressure change. The system is designed to allow tire pressure increases due to heat build-up during vehicle use. The system will not deflate the pressure build-ups, a lower pressure mode selection must be made to decrease the tire pressure. Flat tire/Tire leak detection If the CTIS detects a significantly low tire, the system will display a "CHECK TIRE" message, sound a buzzer and automatically attempt to inflate the tire(s) to the selected mode pressure. The "CHECK TIRE" message and buzzer will stay on until the tire is inflated to the selected mode pressure. 27