MONITORING (TPM), OPERATION
.
If the TPM system detects that the tire pressure in any road tire is going low,
beyond the Low Pressure (lamp) ON threshold (see placard table below), the
TPM system will continuously illuminate an indicator lamp. If a system fault is
detected, the indicator lamp will flash on/off for 75 seconds, then remain on
solid.
If the WCM detects a warning or fault condition at ignition key "on" it will wait
ten s/- 10 % before sending the first request to illuminate the indicator
lamp. This will assure that the display module has concluded its bulb check
period. The display module will request a chime once per ignition cycle for each
"warning" or "fault" condition detected. A "warning" or "fault" condition will
remain enabled until the problem causing the condition is corrected and
removed/reset.
The WCM shall continuously monitor for the receipt of tire pressure RF message
transmissions from the wheel sensors during both the ignition key "on" and key
"off" cycles. The wheel sensor ID's and the location of each sensor (e.g. Tire 1,
Tire 2 etc.) are stored in the WCM non-volatile memory during the initial
Manufacturing Plant Process, or during a service procedure, as required.
The TPM System will continue to warn the driver of low tire pressure as long as
the condition exists, and will not turn off the indicator lamp until the tire pressure
is at or above the Low Pressure (lamp) OFF threshold (see placard table below).
The system will automatically update and the TPM indicator lamp will
extinguish once the updated tire pressures have been received.
Tire pressure will vary with temperature by about 1 psi (6.9 kPa) for every 12°F
(6.5°C). This means that when the outside temperature decreases, the tire
pressure will decrease. Tire pressure should always be set based on cold inflation
tire pressure (placard 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).
The tire pressure will also increase as the vehicle is driven; this is normal and
there should be no adjustment for this increased pressure. For a system fault, the
system will return to normal once the WCM receives a valid transmission from
that sensor location.
PREMIUM TIRE PRESSURE MONITORING
2014 Jeep Patriot Limited
2014 SUSPENSION Tires & Wheels - Service Information - Compass & Patriot
Tuesday, July 19, 2016 10:01:58 AM
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