Jeep Compass 2018 Owner's Manual page 107

efficiency and tire tread life, and may affect
the vehicle's handling and stopping ability.
• The TPMS is not a substitute for proper tire
maintenance, and it is the driver's responsi-
bility to maintain correct tire pressure using
an accurate tire pressure gauge, even if
underinflation has not reached the level to
trigger illumination of the "Tire Pressure Moni-
toring Telltale Light".
• Seasonal temperature changes will affect tire
pressure, and the TPMS will monitor the
actual tire pressure in the tire.
Base System
The Tire Pressure Monitor System (TPMS) uses
wireless technology with wheel rim mounted
electronic sensors to monitor tire pressure lev-
els. Sensors, mounted to each wheel as part of
the valve stem, transmit tire pressure readings
to the receiver module.
NOTE:
It is particularly important for you to check the
tire pressure in all of the tires on your vehicle
monthly and to maintain the proper pressure.
The TPMS consists of the following compo-
nents:
• Receiver Module
• Four Tire Pressure Monitoring Sensors
• Tire Pressure Monitoring Telltale Light
104
Tire Pressure Monitoring Low Pressure
Warnings
The "Tire Pressure Monitoring Telltale
Light" will illuminate in the instrument
cluster, a "LOW TIRE PRESSURE"
message will display in the instrument
cluster and a chime will sound when tire pres-
sure is low in one or more of the four active road
tires. Should this occur, you should stop as soon
as possible, check the inflation pressure of each
tire on your vehicle, and inflate each tire to the
vehicle's recommended cold placard pressure
value. Once the system receives the updated
tire pressures, the system will automatically
update and the "Tire Pressure Monitoring Tell-
tale Light" will turn off.
NOTE:
When filling warm tires, the tire pressure may
need to be increased up to an additional 4 psi
(30 kPa) above the recommended cold placard
pressure in order to turn the Tire Pressure
Monitoring Telltale Light off. The vehicle may
need to be driven for up to 20 minutes above
15 mph (24 km/h) in order for the TPMS to
receive this information.
Service TPMS Warning
When a system fault is detected, the "Tire
Pressure Monitoring Telltale Light" will flash on
and off for 75 seconds and then remain on solid.
The system fault will also sound a chime. If the
ignition is cycled, this sequence will repeat,
providing the system fault still exists. The "Tire
Pressure Monitoring Telltale Light" will turn off
when the fault condition no longer exists. A
system fault can occur due to any of the follow-
ing:
• Jamming due to electronic devices or driving
next to facilities emitting the same radio fre-
quencies as the TPMS sensors.
• Installing some form of aftermarket window
tinting that affects radio wave signals.
• Lots of snow or ice around the wheels or
wheel housings.
• Using tire chains on the vehicle.
• Using wheels/tires not equipped with TPMS
sensors.
Vehicles With Compact Spare or non-
Matching Full Size Spare
1. The compact spare tire or non-matching full
size spare tire does not have a tire pressure
monitoring sensor. Therefore, the TPMS will
not monitor the pressure in the spare tire.
2. If you install the compact or non-matching full
size spare tire in place of a road tire that has
a pressure below the low-pressure warning
limit, a chime will sound and the "TPMS
Telltale Light" and "LOW TIRE PRESSURE"
message will turn on upon the next ignition
cycle.