2008 JEEP LIBERTY maintenance

NOTE:If the instrument cluster is equipped with the
optional Electronic Vehicle Information Center (EVIC),
then most warnings will display in the EVIC. (See page
206 for more information.)
Fuel Cap Fault Message
If the vehicle diagnostic system determines that the fuel
filler cap is loose, improperly installed, or damaged, the
words ªgASCAPº will display in the odometer. If this
occurs, tighten the fuel filler cap properly and press the
odometer reset button to turn off the message. If the
problem continues, the message will appear the next time
the vehicle is started.
A loose, improperly installed, or damaged fuel filler cap
may also turn on the Malfunction Indicator Light (MIL).
(See page 399 for more information.)Change Oil Message (Base & Mid Line Clusters Only)
Your vehicle is equipped with an engine oil change
indicator system. The ªCHANgE OILº message will flash
in the instrument cluster odometer for approximately 12
seconds after a single chime has sounded to indicate the
next scheduled oil change interval. The engine oil change
indicator system is duty cycle based, which means the
engine oil change interval may fluctuate dependent upon
your personal driving style.
Unless reset, this message will continue to display each
time you turn the ignition switch to the ON position. To
turn off the message temporarily, press and release the
Trip Odometer button on the instrument cluster. To reset
the oil change indicator system (after performing the
scheduled maintenance) perform the following proce-
dure:
1. Turn the ignition switch to the ON position (Do not
start the engine).
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4

Unless reset, this message will continue to display each
time you turn the ignition switch to the ON position. To
turn off the message temporarily, press and release the
Menu button. To reset the oil change indicator system
(after performing the scheduled maintenance) perform
the following procedure:
1. Turn the ignition switch to the ON position (Do not
start the engine).
2. Fully depress the accelerator pedal slowly three times
within 10 seconds.
3. Turn the ignition switch to the LOCK position.
NOTE:If the indicator message illuminates when you
start the vehicle, the oil change indicator system did not
reset. If necessary, repeat this procedure.Trip Functions
Press and release the MENU button until one of the
following Trip Functions displays in the EVIC:
²Average Fuel Economy
²Distance To Empty
²Elapsed Time
²Display Units of Measure in
Press the SCROLL button to cycle through all the Trip
Computer functions.
The Trip Functions mode displays the following informa-
tion:
²Average Fuel Economy
Shows the average fuel economy since the last reset.
When the fuel economy is reset, the display will read
ªRESETº or show dashes for two seconds. Then, the
210 INSTRUMENT PANEL AND CONTROLS

Left-Hand Switch Functions for Radio Operation
²
Press the top of the switch to SEEK the next listenable
station up from the current setting.
²Press the bottom of the switch to SEEK the next
listenable station down from the current setting.
²Press the button in the center of the switch to tune to
the next preset that you have programmed.
Left-Hand Switch Functions for Media (i.e. CD)
Operation
²
Press the top of the switch once to listen to the next
track.
²Press the bottom of the switch once either to listen to
the beginning of the current track or to listen to the
beginning of the previous track if it is within one
second after the current track begins to play.
²Press the switch up or down twice to listen to the
second track, three times to listen to the third track,
and so forth.
²Press the button located in the center of the switch to
change to the next preset that you have programmed.
CD/DVD DISC MAINTENANCE
To keep the CD/DVD discs in good condition, take the
following precautions:
1. Handle the disc by its edge; avoid touching the
surface.
2. If the disc is stained, clean the surface with a soft cloth,
wiping from center to edge.
3. Do not apply paper, paper CD labels, or tape to the
disc; avoid scratching the disc.
4. Do not use solvents such as benzine, thinner, cleaners,
or antistatic sprays.
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4

²Most of the time, when in Automatic Operation, you
can temporarily put the system into Recirculation
Mode by pressing the Recirculation Button. However,
under certain conditions, while in Automatic Mode,
the system is blowing air out the defrost vents. When
these conditions are present, and the Recirculation
Button is pressed, the indicator will flash and then
turn off. This tells you that you are unable to go into
recirculation mode at this time. If you would like the
system to go into Recirculation Mode, you must first
move the Mode Knob to Panel, Panel/Floor and then
press the Recirculation Button. This feature reduces
the possibility of window fogging.
Operating Tips
NOTE:Refer to the chart at the end of this section for
suggested control settings for various weather condi-
tions.
Summer Operation
The engine cooling system in air-conditioned vehicles
must be protected with a high-quality antifreeze coolant
to provide proper corrosion protection and to protect
against engine overheating. A 50% solution of ethylene
glycol antifreeze coolant in water is recommended. Refer
to ªMaintenance Proceduresº in Section 7 of this manual
for proper coolant selection.
Winter Operation
Use of the air Recirculation mode during winter months
is not recommended because it may cause window
fogging.
Vacation Storage
Anytime you store your vehicle, or keep it out of service
(i.e. vacation) for two weeks or more, run the air condi-
tioning system at idle for about five minutes in the fresh
air and high blower settings. This will insure adequate
system lubrication to minimize the possibility of com-
pressor damage when the system is started again.
270 INSTRUMENT PANEL AND CONTROLS

Window Fogging
Interior fogging on the windshield can be quickly re-
moved by turning the mode selector to Defrost. The
Defrost/Floor mode can be used to maintain a clear
windshield and provide sufficient heating. If side win-
dow fogging becomes a problem, increase blower speed.
Vehicle windows tend to fog on the inside in mild but
rainy or humid weather.
NOTE:Recirculate without A/C should not be used for
long periods as fogging may occur.
Side Window Demisters
A side window demister outlet is located at each end of
the instrument panel. These non-adjustable outlets direct
air toward the side windows when the system is in the
FLOOR, MIX, or DEFROST mode. The air is directed at
the area of the windows through which you view the
outside mirrors.
Outside Air Intake
Make sure the air intake, located directly in front of the
windshield, is free of obstructions such as leaves. Leaves
collected in the air intake may reduce airflow, and if they
enter the plenum, they could plug the water drains. In
winter months, make sure the air intake is clear of ice,
slush, and snow.
A/C Air Filter Ð If Equipped
The A/C Air Filter will reduce, but not eliminate, diesel
and agricultural smells. The filter acts on air coming from
outside the vehicle and recirculated air within the pas-
senger compartment. Refer to ªMaintenance Proceduresº
in Section 7 of this manual for A/C Air Filter service
information or see your authorized dealer for service.
Refer to the ªMaintenance Schedulesº in Section 8 of this
manual for filter service intervals.
INSTRUMENT PANEL AND CONTROLS 271
4

caution and maintain a steady controlled speed less than
5 mph (8 km/h) in deep water to minimize wave effects.
Flowing Water
If the water is swift flowing and rising (as in storm
run-off) avoid crossing until the water level recedes
and/or the flow rate is reduced. If you must cross
flowing-water, avoid depths in excess of 9 inches. The
flowing water can erode the streambed causing your
vehicle to sink into deeper water. Determine exit point(s)
that are downstream of your entry point to allow for
drifting.
Standing Water
Avoid driving in standing water deeper than 20 inches,
and reduce speed appropriately to minimize wave ef-
fects. Maximum speed in 20 inches of water is less than 5
mph (8 km/h).Maintenance
After driving through deep water, inspect your vehicle
fluids and lubricants (engine, transmission, axle, transfer
case) to assure they have not been contaminated. Con-
taminated fluids and lubricants (milky, foamy in appear-
ance) should be flushed/changed as soon as possible to
prevent component damage.
Driving In Snow, Mud and Sand
In heavy snow, when pulling a load, or for additional
control at slower speeds, shift the transmission to a low
gear and shift the transfer case to 4WD Low if necessary.
Refer to ªFour-Wheel Drive Operationº in this section.
Do not shift to a lower gear than necessary to maintain
headway. Over-revving the engine can spin the wheels
and traction will be lost.
Avoid abrupt downshifts on icy or slippery roads, be-
cause engine braking may cause skidding and loss of
control.
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These cautions apply to all chain traction devices, includ-
ing link and cable (radial) chains.
TIRE ROTATION RECOMMENDATIONS
Tires on the front and rear axles of vehicles operate at
different loads and perform different steering, handling,
and braking functions. For these reasons, they wear at
unequal rates, and develop irregular wear patterns.
These effects can be reduced by timely rotation of tires.
The benefits of rotation are especially worthwhile with
aggressive tread designs such as those on On/Off Road
type tires. Rotation will increase tread life, help to main-
tain mud, snow, and wet traction levels, and contribute to
a smooth, quiet ride.Follow the ªMaintenance Scheduleº in Section 8 of this
manual for the recommended tire rotation frequency.
Remember, more frequent rotation is permissible if de-
sired. Also, correct for anything causing rapid or unusual
wear prior to performing the tire rotation.
The suggested rotation method is the ªforward-crossº
shown in the following diagram.
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5

NOTE:
²The TPMS is not intended to replace normal tire care
and maintenance, or to provide warning of a tire
failure or condition.
²The TPMS should not be used as a tire pressure gauge
while adjusting your tire pressure.
²Driving on a significantly under-inflated tire causes
the tire to overheat and can lead to tire failure.
Under-inflation also reduces fuel efficiency and tire
tread life, and may affect the vehicle's handling and
stopping ability.
²The TPMS is not a substitute for proper tire mainte-
nance, and it is the driver 's responsibility to maintain
correct tire pressure using an accurate tire pressure
gauge, even if under-inflation has not reached the
level to trigger illumination of the Tire Pressure Moni-
toring Telltale light.
²Seasonal temperature changes will affect tire pressure,
and the TPMS will monitor the actual tire pressure in
the tire.
Base System Ð If Equipped
The Tire Pressure Monitor System (TPMS) uses wireless
technology with wheel rim mounted electronic sensors to
monitor tire pressure levels. 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 components:
²Receiver Module
²4 Tire Pressure Monitoring Sensors
²Tire Pressure Monitoring Telltale Light
348 STARTING AND OPERATING