How Temperature Affects Your TirePressure
The tire pressure monitoring systemmonitors tire pressure in each pneumatictire. When driving in a normal manner, atypical passenger tire inflation pressuremay increase about 2–4 psi (14–28 kPa)from a cold start situation. If the vehicle isstationary overnight with the outsidetemperature significantly lower than thedaytime temperature, the tire pressure maydecrease about 3 psi (21 kPa) for a drop of30°F (17°C) in ambient temperature. Thislower pressure value may be detected bythe tire pressure monitoring system asbeing significantly lower than therecommended inflation pressure andactivate the system warning light for lowtire pressure. If the low tire pressurewarning light is on, visually check each tireto verify that no tire is flat. If one or moretires are flat, repair as necessary. Checkthe air pressure in the road tires. If any tireis under-inflated, carefully drive the vehicleto the nearest location where air can beadded to the tires. Inflate all the tires tothe recommended inflation pressure.
Tire Pressure Monitoring System ResetProcedure
WARNING: To determine therequired pressure(s) for your vehicle, seethe Safety Compliance CertificationLabel (on the door hinge pillar,door-latch post or the door edge thatmeets the door-latch post, next to thedriver seat) or the Tire Label on theB-Pillar or the edge of the driver door.
Note:You need to perform the tire pressuremonitoring system reset procedure aftereach tire rotation.
To provide the vehicle's load carryingcapability, some vehicles require differentrecommended tire pressures in the fronttires as compared to the rear tires. The tirepressure monitoring system on thesevehicles illuminate the low tire pressurewarning light at two different pressures:one for the front tires and one for the reartires.
Since tires need to be rotated to provideconsistent performance and maximum tirelife, the tire pressure monitoring systemneeds to know when the tires are rotatedto determine which set of tires are on thefront and which are on the rear. With thisinformation, the system can detect andproperly warn of low tire pressures.
System reset tips:
•To reduce the chances of interferencefrom another vehicle, perform thesystem reset procedure at least 3 ft(1 m) away from another vehicleundergoing the system reset procedureat the same time.
•Do not wait more than two minutesbetween resetting each tire sensor orthe system can time-out and you haveto repeat the entire procedure on allfour wheels.
•A double horn sounds indicating theneed to repeat the procedure.
Performing the System Reset Procedure- Single Rear Wheel
Read the entire procedure beforeattempting.
1.Drive the vehicle above 20 mph(32 km/h) for at least two minutes,then park in a safe location where youcan easily get to all four tires and haveaccess to an air pump.
2.Place the ignition in the off position andkeep the key in the ignition.
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Note:The tire pressure monitoring systemindicator light illuminates when the sparetire is in use. To restore the full function ofthe monitoring system, all road wheelsequipped with tire pressure monitoringsensors must be mounted on the vehicle.
Note:Do not use wheels or wheel nutsdifferent than the original equipment, as thismay damage the wheel or mounting system.
If you get a flat tire when driving, do notapply the brake heavily. Instead, graduallydecrease your speed. Hold the steeringwheel firmly and slowly move to a safeplace on the side of the road.
Have a flat serviced by an authorizeddealer to prevent damage to the tirepressure monitoring system sensors. SeeTire Pressure Monitoring System (page213). Replace the spare tire with a road tireas soon as possible. During repairing orreplacing of the flat tire, have theauthorized dealer inspect the tire pressuremonitoring system sensor for damage.
Dissimilar Spare Wheel and TireAssembly Information
WARNING: Failure to follow theseguidelines could result in an increasedrisk of loss of vehicle control, injury ordeath.
If you have a dissimilar spare wheel andtire, then it is intended for temporary useonly. This means that if you need to use it,you should replace it as soon as possiblewith a road wheel and tire assembly thatis the same size and type as the road tiresand wheels that were originally providedby Ford. If the dissimilar spare tire or wheelis damaged, it should be replaced ratherthan repaired.
A dissimilar spare wheel and tire assemblyis defined as a spare wheel and tireassembly that is different in brand, size orappearance from the road tires and wheelsand can be one of three types:
1.T-type mini-spare: This spare tirebegins with the letter T for tire size andmay have Temporary Use Only molded inthe sidewall.
2.Full-size dissimilar spare with labelon wheel: This spare tire has a label onthe wheel that states: THIS WHEEL ANDTIRE ASSEMBLY FOR TEMPORARY USEONLY.
When driving with one of the dissimilarspare tires listed above:
•Do not exceed 50 mph (80 km/h).
•Do not load the vehicle beyondmaximum vehicle load rating listed onthe Safety Compliance Label.
•Do not tow a trailer.
•Do not use snow chains on the end ofthe vehicle with the dissimilar sparetire.
•Do not use more than one dissimilarspare tire at a time.
•Do not use commercial car washingequipment.
•Do not try to repair the dissimilar sparetire.
Using a dissimilar spare wheel and tireassembly can compromise theeffectiveness of the following:
•Handling, stability and brakingperformance.
•Comfort and noise.
•Ground clearance and parking at curbs.
•Winter weather driving capability.
•Wet weather driving capability.
•All-wheel driving capability.
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