STARTING AND OPERATING
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decrease. Tire pressu re shou ld alw ays be set based on
cold inflation tire pressu re. This is defined as the tire
pressu re after the vehicle has not been driven for at least
increased to the recom mend ed cold tire pressu re in ord er
for the “Tire Pressu re Monitoring Telltale Light” to be
turned off. The system will autom atically update and the
“Tire Pressu re Monitoring Telltale Light” will extingu ish
once the updated tire pressu res have been received . The
vehicle may need to be driven for up to 10 minu tes above
15 mph (24 km/ h) to receive this inform ation.
3
hou rs, or driven less than 1 mile (1 km) after a 3 hou r
period . Refer to the “Tires – General Inform ation ” in
this section for inform ation on how to prop erly inflate
the veh icle’s tires. The tire pressu re will also increase as
the vehicle is driven - this is norm al and there shou ld be
no adjustm ent for this increased pressu re.
For exam ple, you r vehicle has a recom mend ed cold
(parked for more than 3 hou rs) tire pressu re of 33 psi (227 5
kPa). If the ambient tem peratu re is 68°F (20°C) and the
measu red tire pressu re is 28 psi (193 kPa), a tem peratu re
drop to 20°F (-7°C) will decrease the tire pressu re to
approxim ately 24 psi (165 kPa). This tire pressu re is
sufficiently low enou gh to turn ON the “Tire Pressu re
Monitoring Telltale Light.” Driving the vehicle may cause
the tire pressu re to rise to approxim ately 28 psi (193 kPa),
but the “Tire Pressu re Monitoring Telltale Light” will still
be ON. In this situ ation, the “Tire Pressu re Monitoring
The TPM System will warn the driver of a low tire
pressu re if the tire pressu re falls below the low pressu re
warning threshold for any reason, inclu ding low tem -
peratu re effects, or natu ral pressu re loss throu gh the tire.
The TPM System will continu e to warn the driver of low
tire pressu re as long as the cond ition exists, and will not
turn off until the tire pressu re is at or above recom -
mend ed cold tire pressu re. Once the low tire pressu re
warning has been illuminated , the tire pressu re must be
| Categories | Jeep Grand Cherokee Manuals, Jeep Manuals |
|---|---|
| Model Year | 2008 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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