2004 JEEP WRANGLER service

This manual has been prepared with the assistance of
service and engineering specialists to acquaint you with
the operation and maintenance of your new 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.
NOTE:After you read the manual, it should be stored
in the vehicle for convenient reference and remain with
the vehicle when sold so that the new owner will be
aware of all safety warnings.
When it comes to service, remember that your authorized
dealer knows your vehicle best, has the factory-trained
technicians and genuine Mopartparts, and is interested
in your satisfaction.
WARNING!
Engine exhaust, some of its constituents, and certain
vehicle components contain or emit chemicals
known to the State of California to cause cancer and
birth defects or other reproductive harm. In addition,
certain fluids contained in vehicles and certain prod-
ucts of component wear contain or emit chemicals
known to the State of California to cause cancer and
birth defects or other reproductive harm.
HOW TO USE THIS MANUAL
Consult the table of contents to determine which section
contains the information you desire.
The detailed index, at the rear of the manual, contains a
complete listing of all subjects.
6 INTRODUCTION

THINGS TO KNOW BEFORE STARTING YOUR VEHICLE
CONTENTS
mA Word About Your Keys.................11
NIgnition Key..........................11
NKey-In-Ignition Reminder................12
mSentry Key Immobilizer System Ð
If Equipped
...........................12
NImportant Note About Service.............13
NReplacement Keys......................13
NCustomer Key Programming..............13
NGeneral Information....................14
mSteering Wheel Lock Ð If Equipped.........14
NTo Manually Lock The Steering Wheel.......14
NTo Release The Steering Wheel Lock.........14
mIlluminated Entry Ð If Equipped...........15
mDoors And Locks.......................15
NDoor Locks...........................15
mOccupant Restraints.....................16
NLap/Shoulder Belts.....................17
NAdjustable Upper Shoulder Belt Anchorage....21
NSeat Belts And Pregnant Women............21
NSeat Belt Extender......................21
NDriver And Front Passenger Supplemental
Restraint Systems (SRS) Ð Airbags..........22
NChild Restraint........................29
mEngine Break-In Recommendations..........39
2

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.
CAUTION!
Always remove the key from the ignition, and lock
all doors when leaving the vehicle unattended.
SENTRY KEY IMMOBILIZER SYSTEM Ð IF
EQUIPPED
The Sentry Key Immobilizer System (SKIS) prevents
unauthorized operation of the vehicle by disabling the
engine. The system will shut the engine down after 2
seconds of running if an invalid key is used to start the
vehicle. This system utilizes ignition keys which have an
electronic chip (transponder) embedded into them. Only
keys that have been programmed to the vehicle can be
used to start and operate the vehicle for longer than the
2 second validation time period.
The Sentry Key Immobilizer System does not need to be
armed or activated. Operation of the system is automaticregardless of whether or not the vehicle is locked or
unlocked. During normal operation, the SKIS indicator
light will come on for 3 seconds immediately after the
ignition switch is turned on for a bulb check. Afterwards,
if the bulb remains on, this indicates a malfunction in the
electronics. If the bulb begins to flash immediately after
the ignition switch is turned on, this indicates that an
invalid key is being used to start the vehicle. Both of
these conditions will result in the engine being shut
down after 2 seconds of running. Keep in mind that a key
which has not been programmed is also considered an
invalid key even if it is cut to fit the ignition for that
vehicle.
If the SKIS indicator light comes on during normal
vehicle operation (it has been running for longer than 10
seconds) a fault has been detected in the electronics and
the vehicle should be serviced as soon as possible.
NOTE:
²
The Sentry Key Immobilizer System is not compatible
with remote starting systems. Use of these systems
may result in vehicle starting problems and loss of
security protection.
12 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

²Mobil SpeedpassŸ, additional Sentry Keys, or any
other transponder equipped components on the same
keychain will not cause a key-related (Transponder)
fault unless the additional part isphysically held
against the ignition key
being used when starting
the vehicle. Also, 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.
Important Note About Service
A four digit PIN number is needed to service the Sentry
Key Immobilizer System. This number can be obtained
from your authorized dealer. However, this number can
also be found on your customer invoice that you were
given upon receipt of your vehicle.
Replacement Keys
NOTE:
Only keys that have been programmed to the
vehicle electronics can be used to start the vehicle. Once
a Sentry Key has been programmed to a vehicle, it cannot
be programmed to any other vehicle.At the time of purchase, the original owner is provided
with a four digit PIN number. This number is required
for dealer replacement of keys. Duplication of keys may
be performed at an authorized dealer or by using the
Customer Key Programming procedure. This procedure
consists of programming a blank key to the vehicle
electronics. A blank key is one which has never been
programmed.
NOTE:When having the Sentry Key System serviced,
bring all vehicle keys to the dealer.
Customer Key Programming
You can program new keys to the system if you have two
valid keys by doing the following:
1. Cut the additional Sentry Key Transponder blank(s) to
match the ignition switch lock cylinder key code.
2. Insert the first valid key into the ignition switch and
turn the ignition switch ON for at least 3 seconds but no
longer than 15 seconds. Turn the ignition switch OFF and
remove the first key.
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 13
2

To Shut Off the Passenger Airbag
1. Turn ignition to OFF position.
2. Remove the water-resistant plug.
3. Place the ignition key in the Passenger Airbag ON/
OFF Switch, press inward and turn the key to the right to
the OFF position. This will shut off the passenger airbag.
4. Reinstall the water-resistant plug.
NOTE:When the Passenger Airbag ON/OFF Switch is
in the OFF position, a indicator light will illuminate when
the ignition is ON. If the indicator light does not illumi-
nate for 3 seconds after the ignition is turned ON, or
when the Passenger Airbag ON/OFF Switch is turned
OFF (while ignition is in the ON position), have an
authorized dealer service the system immediately.
To Turn On the Passenger Airbag
1. Turn ignition to OFF position.
2. Remove the water-resistant plug.3. Place the ignition key in the Passenger Airbag ON/
OFF Switch, press inward and turn the key to the left to
the ON position. This will turn on the passenger airbag.
4. Reinstall the water-resistant plug.
NOTE:Do not turn the Passenger Airbag ON/OFF
Switch on or off with the ignition in the ON/RUN or
START positions, as the ACM could cause the ªAirbag
Warning Lampº to illuminate.
If A Deployment Occurs
The airbag system is designed to deploy when the impact
sensors detect a moderate-to-severe frontal collision, to
help restrain the driver and right front passenger, and
then to immediately deflate.
NOTE:A frontal collision that is not severe enough to
need airbag protection will not activate the system. This
does not mean something is wrong with the airbag
system.
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 27
2

Maintaining Your Airbag System
WARNING!
²Modifications to any part of the airbag system
could cause it to fail when you need it. You could
be injured because the airbags are not there to
protect you. Do not modify the components or
wiring, including adding any kind of badges or
stickers to the steering wheel hub trim cover or
the upper right side of the instrument panel. Do
not modify the front bumper, vehicle body struc-
ture, or frame.
²You need proper knee impact protection in a
collision. Do not mount or locate any aftermarket
equipment on or behind the knee bolster.
²It is dangerous to try to repair any part of the
airbag system yourself. Be sure to tell anyone who
works on your vehicle that it has airbags.
Airbag Warning Light
You will want to have the airbags ready to inflate for your
protection in an collision. While the airbag system is
designed to be maintenance free, if any of the following
occurs, have an authorized dealer service the system
immediately.
²The ªAirbag Warning Lightº does not come on or
flickers during the 6 to 8 seconds when the ignition
switch is first turned on.
²The ªAirbag Warning Lightº remains on or flickers
after the 6 to 8 second interval.
²The ªAirbag Warning Lightº flickers or comes on and
remains on while driving.
Child Restraint
Everyone in your vehicle needs to be buckled up all the
time-babies and children, too. Every state in the United
States and all Canadian provinces require that small
children ride in proper restraint systems. This is the law,
and you can be prosecuted for ignoring it.
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 29
2

Safety Checks You Should Make Inside The
Vehicle
Seat Belts
Inspect the belt system periodically, checking for cuts,
frays and loose parts. Damaged parts must be replaced
immediately. Do not disassemble or modify the system.
Seat belt assemblies must be replaced after an accident if
they have been damaged (bent retractor, torn webbing,
etc.). If there is any question regarding belt or retractor
condition, replace the belt.
Airbag Warning Light
The light should come on and remain on for 6 to 8
seconds as a indicator check when the ignition switch is
first turned on. If the indicator is not lit during starting,
have it serviced. If the light stays on or comes on while
driving, have the system checked by an authorized
dealer.
Defrosters
Check operation by selecting the defrost mode and place
the blower control on high speed. You should feel the air
directed against the windshield.
Safety Checks You Should Make Outside The
Vehicle
Tires
Examine tires for excessive tread wear or uneven wear
patterns. Check for stones, nails, glass, or other objects
lodged in the tread. Inspect for tread cuts or sidewall
cracks. Check wheel nuts for tightness and tires (includ-
ing spare) for proper pressure.
Lights
Have someone observe the operation of all exterior lights
while you work the controls. Check turn signal and high
beam indicator lights on the instrument panel.
Fluid Leaks
Check area under vehicle after overnight parking for fuel,
coolant, oil, or other fluid leaks. Also, if gasoline fumes
are detected, the cause should be located and corrected
immediately.
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 41
2

7. High Beam Indicator Light
This light shows that the headlights are on high
beam. Pull the turn signal lever towards the
steering wheel to switch the headlights from high or
low. If the driver's door is open, and the headlights or
parklights are left on, the ªHigh Beam Indicator Lightº
will flash and a chime will sound.
8. Seat Belt Indicator Light
A warning chime and an indicator light will
alert you to buckle the seat belts. When the belt
is buckled, the chime will stop, but the light will
stay on until it times out (about 6 seconds).
9. Speedometer
Indicates vehicle speed.
10. Front Axle Lock Indicator Light Ð If Equipped
Indicates when the front axle lock has been
activated.11. Rear Axle Lock Indicator Light Ð If Equipped
Indicates when the rear axle lock has been
activated.
12. 4WD Indicator Light
This light alerts the driver that the vehicle is
in the four-wheel drive mode, and the front
and rear driveshafts are mechanically locked
together forcing the front and rear wheels to
rotate at the same speed.
13. Shift Indicator Light Ð If Equipped
This light shows the driver when to shift to the
next higher gear for best fuel economy (4.0L
Only).
14. Oil Pressure Gauge
Indicates engine oil pressure. This gauge does
not indicate oil level, and pressure varies with
engine speed, temperature and oil viscosity. Consis-
tent lower readings indicate possible malfunction.
Seek authorized service.
UNDERSTANDING YOUR INSTRUMENT PANEL 117
4