engine JEEP LIBERTY 2008 KK / 2.G Repair Manual

Interlocking Ignition Systemº under ªManual Transmis-
sionº or to ªStarting Proceduresº in this section for
details.
N
Neutral - Disengages both the front driveshaft and rear
driveshaft from the powertrain. To be used for flat
towing behind another vehicle. Refer to ªRecreational
Towingº in this section for more information.
Transfer Case Position Indicator Lights
The 4WD indicator lights are located in the instrument
cluster. The ªNº (Neutral) indicator light is located on the
4WD Control Switch. If there is no indicator light on or
flashing, the transfer case position is 2-wheel drive
(2WD). If the indicator light is on, the desired position
(4WD AUTO, 4WD LOW, or NEUTRAL) has been ob-
tained.If One or More Shift Requirements are not met:
²An indicator light will flash.
²The transfer casewill notshift.
NOTE:The ªSERV 4WDº warning light monitors the
electric shift 4WD system. If this light remains on after
engine start up, or it illuminates during driving, it means
that the 4WD system is not functioning properly and that
service is required.
Shifting Procedures
NOTE:If any of the requirements to select a new
transfer case position have not been met, the transfer case
will not shift, the indicator light for the previous position
will remain ON, and the newly selected position indica-
tor light will continue to flash until all the requirements
for the selected position have been met. To retry a shift,
move the 4WD Control Switch back to the original
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position, make certain all shift requirements have been
met, wait five (5) seconds, and try the shift again.
2WD to 4WD Auto
Move the 4WD Control Switch to the desired position.
Shifts between 2WD and 4WD Auto can be done with the
vehicle stopped or in motion. If the vehicle is stopped,
the ignition switch must be in the ON position with the
engine either OFF or RUNNING. This shift cannot be
completed if the ignition switch is in the ACC position.
2WD or 4WD Auto to 4WD Low
When shifting into or out of 4WD LOW, some gear noise
may be heard. This noise is normal and is not detrimental
to the vehicle or its occupants.
Shifting can be performed with the vehicle rolling 2-3
mph (3-5 km/h) using the ªPreferred Procedureº or
completely stopped using the ªAlternate Procedures.ºPreferred Procedure
1. With the engine RUNNING, slow the vehicle speed to
2-3 mph (3-5 km/h).
2. Shift the transmission into ªNº (Neutral) (automatic
transmission), or depress the clutch pedal (manual trans-
mission).
3. While still rolling, move the 4WD Control Switch to
the desired position.
4. After the desired position indicator light is ON (not
flashing), shift the transmission into gear (automatic
transmission), or release the clutch pedal (manual trans-
mission).
Alternate Procedure
1. Bring the vehicle to a complete stop.
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2. With the ignition switch in the ON position and the
engine OFF or RUNNING, shift the transmission into
ªNº (Neutral) (automatic transmission), or depress the
clutch pedal (manual transmission).
3. Move the 4WD Control Switch to the desired position.
4. After the desired position indicator light is ON (not
flashing), shift the transmission into gear (automatic
transmission), or release the clutch pedal (manual trans-
mission).
NOTE:
²Steps 1 and 2 in the ªPreferred Procedureº and the
ªAlternate Procedureº are requirements for shifting
the transfer case. If these requirements are not met
prior to attempting the shift or while the shift attempt
is in process, then the indicator light will flash, and the
current transfer case position will be maintained. To
retry a shift, move the 4WD Control Switch back to theoriginal position, make certain all shift requirements
have been met, wait five (5) seconds, and try the shift
again.
²The ignition switch must be in the ON position for a
shift to take place and for the position indicator lights
to be operable. If the ignition switch is not in the ON
position, then the shift will not take place, and no
position indicator lights will be on or flashing.
ON-ROAD DRIVING TIPS
Utility vehicles have higher ground clearance and a
narrower track to make them capable of performing in a
wide variety of off-road applications. Specific design
characteristics give them a higher center of gravity than
ordinary cars.
An advantage of the higher ground clearance is a better
view of the road, allowing you to anticipate problems.
They are not designed for cornering at the same speeds as
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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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Hill Climbing
NOTE:Before attempting to climb a hill, determine the
conditions at the crest and/or on the other side.
Before climbing a steep hill,shift the transmission to a
lower gear and shift the transfer case to 4WD Low. Use
first gear and 4WD Low for very steep hills.
If you stall or begin to lose headwaywhile climbing a
steep hill, allow your vehicle to come to a stop and
immediately apply the brakes. Restart the engine and
shift to R (Reverse). Back slowly down the hill allowing
the compression braking of the engine to help regulate
your speed. If the brakes are required to control vehicle
speed, apply them lightly and avoid locking or skidding
the tires.
WARNING!
If the engine stalls or you lose headway or cannot
make it to the top of a steep hill or grade, never
attempt to turn around. To do so may result in
tipping and rolling the vehicle. Always back straight
down a hill in R (Reverse) gear carefully. Never back
down a hill in N (Neutral) using only the brake.
Remember, never drive diagonally across a hill-always
drive straight up or down.
If the wheels start to slip as you approach the crest of a
hill, ease off the accelerator and maintain headway by
turning the front wheels slowly left and right. This may
provide a fresh ªbiteº into the surface and will usually
provide traction to complete the climb.
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Traction Downhill
Shift the transmission into a low gear and the transfer
case to 4WD Low range. Let the vehicle go slowly down
the hill with all four wheels turning against engine
compression drag. This will permit you to control the
vehicle speed and direction.
When descending mountains or hills, repeated braking
can cause brake fade with loss of braking control. Avoid
repeated heavy braking by downshifting the transmis-
sion whenever possible.
After Driving Off-Road
Off-road operation puts more stress on your vehicle than
does most on-road driving. After going off-road, it is
always a good idea to check for damage. That way you
can get any problems taken care of right away and have
your vehicle ready when you need it.
²Completely inspect the underbody of your vehicle.
Check tires, body structure, steering, suspension, and
exhaust system for damage.
²Check threaded fasteners for looseness, particularly on
the chassis, drivetrain components, steering, and sus-
pension. Retighten them, if required, and torque to the
values specified in the Service Manual.
²Check for accumulations of plants or brush. These
things could be a fire hazard. They might hide damage
to fuel lines, brake hoses, axle pinion seals, and
propeller shafts.
²After extended operation in mud, sand, water, or
similar dirty conditions, have brake rotors, wheels,
brake linings, and axle yokes inspected and cleaned as
soon as possible.
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²Do not ªrideº the brakes by resting your foot on the
pedal. This could overheat the brakes and result in
unpredictable braking action, longer stopping dis-
tances, or brake damage.
²When descending mountains or hills, repeated brak-
ing can cause brake fade with loss of braking control.
Avoid repeated heavy braking by downshifting the
transmission or locking out overdrive whenever pos-
sible.
²Engines may idle at higher speeds during warm-up,
which could cause rear wheels to spin and result in
loss of vehicle control. Be especially careful while
driving on slippery roads, in close quarter maneuver-
ing, parking, or stopping.
²Do not drive too fast for road conditions, especially
when roads are wet or slushy. A wedge of water canbuild up between the tire tread and the road. This
hydroplaning action can cause loss of traction, braking
ability, and control.
²After going through deep water or a car wash, brakes
may become wet, resulting in decreased performance
and unpredictable braking action. Dry the brakes by
gentle, intermittent pedal action while driving at very
slow speeds.
POWER STEERING
The standard power steering system will give you good
vehicle response and increased ease of maneuverability
in tight spaces. The system will provide mechanical
steering capability if power assist is lost.
If for some reason the power assist is interrupted, it will
still be possible to steer your vehicle. Under these condi-
tions, you will observe a substantial increase in steering
effort, especially at very low vehicle speeds and during
parking maneuvers.
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TCS (Traction Control System)
This system monitors the amount of wheel spin of each of
the driven wheels. If wheel spin is detected, brake
pressure is applied to the slipping wheel(s) and engine
power is reduced to provide enhanced acceleration and
stability. A feature of the TCS system functions similar to
a limited slip differential and controls the wheel spin
across a driven axle. If one wheel on a driven axle is
spinning faster than the other, the system will apply the
brake of the spinning wheel. This will allow more engine
torque to be applied to the wheel that is not spinning.
This feature remains active even if TCS and ESP are in the
ªPartial Offº mode or the ªFull Offº mode. Refer to ªESP
(Electronic Stability Program)º in this section for more
information.
BAS (Brake Assist System)
The BAS is designed to optimize the vehicle's braking
capability during emergency braking maneuvers. The
system detects an emergency braking situation by sens-
ing the rate and amount of brake application and then
applies optimum pressure to the brakes. This can help
reduce braking distances. The BAS complements the
anti-lock brake system (ABS). Applying the brakes very
quickly results in the best BAS assistance. To receive the
benefit of the system, you must apply continuous brak-
ing pressure during the stopping sequence, (do not
ªpumpº the brakes). Do not reduce brake pedal pressure
unless braking is no longer desired. Once the brake pedal
is released, the BAS is deactivated.
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WARNING!
BAS (Brake Assist System) cannot prevent the natu-
ral laws of physics from acting on the vehicle, nor can
it increase the traction afforded by prevailing road
conditions. BAS cannot prevent accidents, including
those resulting from excessive speed in turns, driving
on very slippery surfaces, or hydroplaning. Only a
safe, attentive, and skillful driver can prevent acci-
dents. The capabilities of a BAS-equipped vehicle
must never be exploited in a reckless or dangerous
manner, which could jeopardize the user's safety or
the safety of others.
ERM (Electronic Roll Mitigation)
This system anticipates the potential for wheel lift by
monitoring the driver 's steering wheel input and the
speed of the vehicle. When ERM determines that the rate
of change of the steering wheel angle and vehicle's speed
are sufficient to potentially cause wheel lift, it then
applies the appropriate brake and may also reduce
engine power to lessen the chance that wheel lift will
occur. ERM will only intervene during very severe or
evasive driving maneuvers. ERM can only reduce the
chance of wheel lift occurring during severe or evasive
driving maneuvers. It cannot prevent wheel lift due to
other factors, such as road conditions, leaving the road-
way, or striking objects or other vehicles.
NOTE:ERM is disabled anytime the ESP is in ªFull Offº
mode. Refer to ESP (Electronic Stability Program) for a
complete explanation of the available ESP modes.
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WARNING!
Many factors, such as vehicle loading, road condi-
tions, and driving conditions, influence the chance
that wheel lift or rollover may occur. ERM (Electronic
Roll Mitigation) cannot prevent all wheel lift or
rollovers, especially those that involve leaving the
roadway or striking objects or other vehicles. Only a
safe, attentive, and skillful driver can prevent acci-
dents. The capabilities of an ERM-equipped vehicle
must never be exploited in a reckless or dangerous
manner, which could jeopardize the user's safety or
the safety of others.
TSC (Trailer Sway Control) ± If Equipped
TSC uses sensors in the vehicle to recognize an exces-
sively swaying trailer. TSC activates automatically once
the excessively swaying trailer is recognized. When TSC
is functioning, the ªESP/TCS Indicatorº light will flash,
the engine power will be reduced, and you will feel the
brake being applied to individual wheels in an attempt to
stop the trailer from swaying.
NOTE:The TSC is disabled when the ESP system is in
the ªPartial Offº mode and ªFull Offº mode.
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