Ford 2004 Expedition v.2 Manuel d'utilisateur télécharger pdf (Page 327)

increase in the contained air temperature. Contained air temperature is

dependent upon several factors such as rate of tire rotation, tire

deflection, amount of braking, etc. In similar manner, the tire pressure

will decrease if the contained air temperature decreases. For example, if

the vehicle is stationary over night with the outside temperature

significantly lower than the daytime temperature, the tire pressure may

decrease approximately 20.7 kPa (3 psi) for a drop of 16.6° C (30° F) in

ambient temperature. This lower pressure value may be detected by the

TPMS as being significantly lower than the cold pressure indicated on

your vehicles tire label, and activate the TPMS warning for low tire

pressure. If the low warning light is on, visually check each tire to verify

that no tire is flat. If one or more tires are flat, repair of fix as necessary.

If all tires appear to be inflated, carefully drive the vehicle to the nearest

location where air can be added to the tires. Turn the ignition to the

“off” position. Inflate all the tires to the recommended cold pressure.

The system uses radio-frequency to monitor the tire pressure on all tires

excluding the spare tire. The sensors transmit the tire pressure readings

to the receiver module located in the vehicle. The receiver module then

electronically transmits the status to the message center. For more tire

warning information, refer to the Message Center in the Driver controls

chapter.

This device complies with part 15 of the FCC rules and with RS-210 of

Industry Canada. Operation is subject to the following two conditions:

(1) This device may not cause harmful interference, and (2) This device

must accept any interference received, including interference that may

cause undesired operation.

The tire pressure monitoring system is NOT a substitute for

manually checking tire pressure. The tire pressure should be

checked periodically (at least monthly) using a tire gauge, see Tire

inflation pressure in this chapter. Failure to properly maintain your

tire pressure could increase the risk of tire failure, loss of control,

vehicle rollover and personal injury.

2004 Expedition (exd)

Owners Guide (post-2002-fmt)

USA English (fus)

Maintenance and Specifications

327

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Ford 2004 Expedition v.2 Manuel d'utilisateur Page 327