2008 JEEP WRANGLER engine

INTRODUCTION
This is a specialized utility vehicle designed for both
on-road and off-road use. It can go places and perform
tasks for which conventional two-wheel drive enclosed
vehicles were not intended. It handles and maneuvers
differently from many passenger cars both on-road and
off-road, so take time to become familiar with your
vehicle.
The two-wheel drive utility vehicle was designed for
on-road use only. It is not intended for off-road driving
or use in other severe conditions suited for a four-wheel
drive vehicle.
Before you start to drive this vehicle, read the Owner’s
Manual. Be sure you are familiar with all vehicle controls,
particularly those used for braking, steering, transmis-
sion, and transfer case shifting. Learn how your vehicle
handles on different road surfaces. Your driving skills
will improve with experience. When driving off-road orworking the vehicle, don’t overload the vehicle or expect
the vehicle to overcome the natural laws of physics.
Always observe federal, state, provincial and local laws
wherever you drive.
As with other vehicles of this type, failure to operate this
vehicle correctly may result in loss of control or an
accident. Refer to “On-Road/Off-Road Driving Tips” in
Section 5 of this manual.
This manual has been prepared with the assistance of
service and engineering specialists to acquaint you with
the operation and maintenance of your vehicle. It is
supplemented by a Warranty Information Booklet and
various customer-oriented documents. You are urged to
read these publications carefully. Following the instruc-
tions and recommendations in this manual will help
assure safe and enjoyable operation of your vehicle.
4 INTRODUCTION

▫Seat Belt Pretensioners ...................48
▫ Enhanced Seat Belt Use Reminder System
(BeltAlert) ..........................49
▫ Seat Belts And Pregnant Women ............50
▫ Seat Belt Extender ......................50
▫ Driver And Front Passenger Supplemental
Restraint Systems (SRS) ..................51
▫ Child Restraint ........................62 
Engine Break-In Recommendations ...........75
 Safety Tips ............................75
▫ Exhaust Gas ..........................75
▫ Safety Checks You Should Make Inside The
Vehicle ..............................76
▫ Safety Checks You Should Make Outside The
Vehicle ..............................77
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 11
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Key-In-Ignition Reminder
Opening the driver’s door when the key is in the ignition,
sounds a signal to remind you to remove the key.
STEERING WHEEL LOCK
Your vehicle is equipped with a passive steering wheel
lock. This lock prevents steering the vehicle without the
ignition key. If the steering wheel is moved a half turn in
either direction, and the key is not in the ignition, the
steering wheel will lock.
To Manually Lock the Steering Wheel
With the engine running, rotate the steering wheel one–
half revolution from the straight ahead position, turn off
the engine, and remove the key. Rotate the steering wheel
slightly in both directions until the lock engages.
To Release the Steering Wheel Lock
Insert the key in the ignition, and turn the wheel slightly
to the left or right, to disengage the lock.
NOTE:If you turned the wheel to the right to engage
the lock, you must turn the wheel slightly to the right to
disengage it. If you turned the wheel to the left to engage
the lock, turn the wheel slightly to the left to disengage it.
SENTRY KEY
The Sentry Key Immobilizer System prevents unautho-
rized vehicle operation by disabling the engine. The
system does not need to be armed or activated. Operation
is automatic, regardless of whether the vehicle is locked
or unlocked.
The system uses ignition keys that have an embedded
electronic chip (transponder) to prevent unauthorized
vehicle operation. Therefore, only keys that are pro-
grammed to the vehicle can be used to start and operate
14 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

the vehicle. The system will shut the engine off in two
seconds if someone uses an invalid key to try to start the
engine.
NOTE:A key that has not been programmed is also
considered an invalid key, even if it is cut to fit the
ignition switch lock cylinder for that vehicle.
During normal operation, after turning on the ignition
switch, the Vehicle Security Alarm Indicator Light will
turn on for three seconds for a bulb check. If the light
remains on after the bulb check, it indicates that there is
a problem with the electronics. In addition, if the light
begins to flash after the bulb check, it indicates that
someone used an invalid key to try to start the engine.
Either of these conditions will result in the engine being
shut off after two seconds.
If the Vehicle Security Alarm Indicator Light turns on
during normal vehicle operation (vehicle running for longer than 10 seconds), it indicates that there is a fault in
the electronics. Should this occur, have the vehicle ser-
viced as soon as possible.
NOTE:
•The Sentry Key
Immobilizer System is not compat-
ible with some aftermarket remote starting systems.
Use of these systems may result in vehicle starting
problems and loss of security protection.
•Exxon/Mobil Speedpass™, additional Sentry Keys,
or any other transponder-equipped components on
the same key chain will notcause a key-related
(transponder) fault unless the additional part is physi-
cally held against the ignition key being used when
starting the vehicle. Cell phones, pagers, or other RF
electronics will not cause interference with this system.
All of the keys provided with your new vehicle have
been programmed to the vehicle electronics.
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 15
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Programming Additional Transmitters
Vehicles will be shipped from the assembly plants with
two key fob transmitters programmed only for that
vehicle. A total of eight key fobs can be programmed for
your vehicle. Additional key fobs can be programmed to
your vehicle through the use of a currently programmed
fob.
NOTE:When entering the program mode using that
key fob, all other programmed key fobs will be erased
and you will have to reprogram them for your vehicle.
Use the following procedure to program additional key
fobs if the vehicle is not equipped with a Sentry Key:
1. Enter the vehicle and close all of the doors.
2. Fasten your seat belt (Fastening the seat belt will
cancel any chiming that may confuse you during this
programming procedure).
3. Place the ignition key into the ignition. 4. Turn the ignition to the ON position.
Do not start the
engine.
5. Press and hold the UNLOCK button.
6. After holding the UNLOCK button for four seconds,
also press the PANIC button within six seconds.
7. When a single chime is heard, release both buttons.
The chime is an indication that you have successfully
entered program mode. All key fobs that are to be
programmed must be done so within 60 seconds of when
the chime was heard.
8. Using the key fob to be programmed, press and
release both the LOCK and UNLOCK buttons, simulta-
neously.
9. A single chime will be heard.
10. Within four seconds of hearing the chime, press and
release the UNLOCK button.
22 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

NOTE:If the key fob is equipped with a screw, reinstall
and tighten the screw until snug.
REMOTE STARTING SYSTEM — IF EQUIPPED
Your vehicle may be equipped with a remote starting
system (automatic transmission models only), which will
allow the vehicle to be started from distances up to
approximately 300 ft (91 m) away from the vehicle using
the remote keyless entry key fob which is part of your
ignition key.
In order to remote start your vehicle, the hood, swing
gate, and all the doors must be closed.
To remote start your vehicle, press the “Remote Start”
button on the key fob twice within five seconds. To
indicate that the vehicle is about to start, the park lights
will flash and the horn will sound briefly (if pro-
grammed). Once the vehicle has started, the engine will run for 15
minutes. To cancel remote start, press the “Remote Start”
button once.
Remote Start Key Fob
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 25
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The park lamps will remain illuminated to indicate that
the vehicle has remote started and the engine is running.
The lamps will turn off when the ignition is turned to
RUN or the remote start is cancelled.
To enter the vehicle while the engine is running during a
remote start, you must first unlock the vehicle using the
UNLOCK button on the key fob. Then, prior to the end of
the 15 minute cycle, insert the key into the ignition switch
and turn the switch to the ON position, otherwise the
engine will cancel remote start and automatically turn
off.
Remote start will also cancel if any of the following occur:
•If the engine stalls or RPM exceeds 2500
•Any engine warning lamps come on
•The hood is opened
•The hazard switch is pressed
•The transmission is moved out of PARK
The vehicle can be started remotely up to a maximum of
two times. The vehicle is also allowed a maximum of one
failed start, where the remote start sequence was initiated
but the engine stopped cranking without starting. After
either of these conditions, or if the Security Alarm is
alarming, or if the PANIC button was pressed, the vehicle
must be reset by inserting a valid key into the ignition
and moving it to the RUN position, then back to LOCK.
DOORS
The vacuum fluorescent (VF) display located in the
odometer area will display the word “door” as an
indication of a door ajar or not completely closed. When
the vehicle is not moving and the door is ajar or not
completely closed, the VF display will show the word
“door.”
26 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

Enhanced Seat Belt Use Reminder System
(BeltAlert)
If the driver’s seat belt has not been buckled within 60
seconds of starting the vehicle and if the vehicle speed is
greater than 5 mph (8 km/h), the Enhanced Warning
System (BeltAlert) will alert the driver to buckle the seat
belt. The driver should also instruct all other occupants to
buckle their seat belts. Once the warning is triggered, the
Enhanced Warning System (BeltAlert) will continue to
chime and flash the Seat Belt Warning Light for 96
seconds or until the driver’s seat belt is buckled.
The Enhanced Warning System (BeltAlert) will be reac-
tivated if the driver’s seat belt is unbuckled for more than
10 seconds and the vehicle speed is greater than 5 mph (8
km/h).
The Enhanced Warning System (BeltAlert) can be en-
abled or disabled by your authorized dealer or by
following these steps:NOTE:
The following steps must occur within the first
60 seconds of the ignition switch being turned to the ON
or START position. The manufacturer does not recom-
mend deactivating the Enhanced Warning System
(BeltAlert).
1. Turn the ignition switch to the OFF position, and
buckle the driver’s seat belt.
2. Turn the ignition key to the ACC/RUN position
(engine does not need to be running), and wait for the
Seat Belt Warning Light to turn off.
3. Within 60 seconds of starting the vehicle, unbuckle
and then re-buckle the driver’s seat belt at least three
times within 10 seconds, ending with the seat belt
buckled.
4. Turn the ignition key to the OFF position. A single
chime will sound to signify that you have successfully
completed the programming.
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 49
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