Jeep 2007 Grand Cherokee Manuel d'utilisateur télécharger pdf (Page 296)

decrease. Tire pressure should always be set based on

cold inflation tire pressure. This is defined as the tire

pressure after a vehicle has not been driven for more than

3 hours - and in outside ambient temperature. Refer to

the “Tires – General Information” in this section for

information on how to properly inflate the vehicle’s

tires. The tire pressure will also increase as the vehicle is

driven - this is normal and there should be no adjustment

for this increased pressure.

The TPM System will warn the driver of a low tire

pressure if the tire pressure falls below the low pressure

warning threshold for any reason, including low tem-

perature effects.

The TPM System will continue to warn the driver of low

tire pressure as long as the condition exists, and will not

turn off until the tire pressure is at or above recom-

mended cold tire pressure. Once the low tire pressure

warning has been illuminated, the tire pressure must be

increased to the recommended cold tire pressure in order

for the “Tire Pressure Monitoring Telltale Light” to be

turned off. The system will automatically update and the

“Tire Pressure Monitoring Telltale Light” will extinguish

once the updated tire pressures have been received. The

vehicle may need to be driven for up to 10 minutes above

15 mph (24 km/h) to receive this information.

For example, your vehicle has a recommended cold

(parked for more than 3 hours) tire pressure of 33 psi (227

kPa). If the ambient temperature is 68°F (20°C) and the

measured tire pressure is 28 psi (193 kPa), a temperature

drop to 20°F (-7°C) will decrease the tire pressure to

approximately 24 psi (165 kPa). This tire pressure is

sufficiently low enough to turn ON the “Tire Pressure

Monitoring Telltale Light.” Driving the vehicle may cause

the tire pressure to rise to approximately 28 psi (193 kPa),

but the “Tire Pressure Monitoring Telltale Light” will still

be ON. In this situation, the “Tire Pressure Monitoring

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Jeep 2007 Grand Cherokee Manuel d'utilisateur Page 296