2008 JEEP WRANGLER engine

Operating Instructions — Voice Recognition
System (VR) (If Equipped)
For the radio, refer to “Voice Recognition System (VR)” in
Section 3.
For UConnect“Voice Recognition System (VR),” refer to
“Hands-Free Communication (UConnect)” in Section 3.
Operating Instructions - Hands-Free Phone
(UConnect) (If Equipped)
Refer to “Hands-Free Communication (UConnect)” in
Section 3.
Operating Instructions - Satellite Radio Mode (If
Equipped)
Refer to “Satellite Radio” in this section.
Operating Instructions - Video Entertainment
System (VES) (If Equipped)
Refer to separate “Video Entertainment System (VES)
Guide.” Dolby
Manufactured under license from Dolby
Laboratories.
Dolby and the double-D symbol are trademarks of
Dolby Laboratories.
Macrovision
This product incorporates copyright protection technol-
ogy that is protected by U.S. patents and other intellec-
tual property rights. Use of this copyright protection
technology must be authorized by Macrovision, and is
intended for home and other limited viewing uses only,
unless otherwise authorized by Macrovision. Reverse
engineering or disassembly is prohibited
DTS™
DTS™ andDTS™ 2.0 are trademarks of Digital The-
ater Systems, Inc.
UNDERSTANDING YOUR INSTRUMENT PANEL 249
4

NOTE:Continuous use of the “Recirculate” mode may
make the inside air stuffy and window fogging may
occur. Extended use of this mode is not recommended.
In cold or damp weather, the use of the “Recirculate”
mode will cause windows to fog on the inside because of
moisture buildup inside the vehicle. For maximum de-
fogging, select the Outside Air position.
NOTE: The “Recirculate” mode will not operate in floor,
mix or defrost modes.Air Conditioning
Normal Operation
Press this button to engage the air
conditioning. A lamp will illumi-
nate when the air conditioning
system is engaged. Once the air
conditioning is engaged, use a
combination of the mode control,
fan speed control, and tempera-
ture control to achieve your de-
sired interior temperature.
NOTE: The air conditioning compressor will not engage
until the engine has been running for about 10 seconds.
264 UNDERSTANDING YOUR INSTRUMENT PANEL

Regular cleaning of the inside of the windows with a
non-filming cleaning solution (vinegar and water works
very well) will help prevent contaminates (cigarette
smoke, perfumes, etc.) from sticking to the windows.
Contaminates increase the rate of window fogging.
Summer Operation
Air conditioned vehicles must be protected with a high
quality antifreeze coolant during summer to provide
proper corrosion protection and to raise the boiling point
of the coolant for protection against overheating. A 50 %
concentration is recommended. Refer to Fluids and
Genuine Parts in Section 7 for the proper coolant type.
When using the air conditioner in extremely heavy traffic
in hot weather especially when towing a trailer, addi-
tional engine cooling may be required. If this situation is
encountered, operate the transmission in a lower gear to
increase engine RPM, coolant flow and fan speed. When
stopped in heavy traffic, it may be necessary to shift intoNEUTRAL (N) and depress the accelerator slightly for
fast idle operation to increase coolant flow and fan speed.
Winter Operation
When operating the system during the winter months,
make sure the air intake, located directly in front of the
windshield, is free of ice, slush, snow, or other obstruc-
tions.
Vacation Storage
Anytime you store your vehicle, or keep it out of service
(i.e., vacation) for two weeks or more, run the air
conditioning system at idle for about five minutes in the
fresh air and high blower setting. This will ensure
adequate system lubrication to minimize the possibility
of compressor damage when the system is started again.
266 UNDERSTANDING YOUR INSTRUMENT PANEL

STARTING AND OPERATING
CONTENTS
Starting Procedures .....................271
▫ Manual Transmission ..................271
▫ Automatic Transmission ................271
▫ Normal Starting ......................271
▫ Extreme Cold Weather (Below –20°F
Or –29°C) ...........................272
▫ If Engine Fails To Start .................273
▫ After Starting ........................274
 Engine Block Heater — If Equipped .........275
Manual Transmission ....................275
▫ Shifting ............................276
▫ Downshifting ........................277
▫ Reverse Shifting ......................278
 Automatic Transmission ..................279
▫ Shift Lock Manual Override ..............279
▫ Brake/Transmission Interlock System .......281
▫ Automatic Transmission With Overdrive .....281
5

STARTING PROCEDURES
Before starting your vehicle, adjust your seat, adjust both
inside and outside mirrors, and fasten your seat belts.
WARNING!
Do not leave children or animals inside parked
vehicles in hot weather. Interior heat buildup may
cause serious injury or death.
Manual Transmission
Apply the parking brake, place the shift lever in NEU-
TRAL and depress the clutch pedal before starting ve-
hicle. This vehicle is equipped with a clutch interlocking
ignition system. It will not start unless the clutch pedal is
pressed to the floor.4WD Models Only
In 4L mode, this vehicle will start regardless of whether
or not the clutch pedal is pressed to the floor. This feature
enhances off-road performance by allowing the vehicle to
start when in 4L without having to depress the clutch
pedal. The 4WD Indicator Light will illuminate when the
transfer case has been shifted into this mode.
Automatic Transmission
Start the engine with the shift lever in the NEUTRAL or
PARK position. Apply the brake before shifting to any
driving range.
Normal Starting
NOTE:
Normal starting of either a cold or a warm
engine is obtained without pumping or depressing the
accelerator pedal.
STARTING AND OPERATING 271
5

Turn the ignition switch to the START position and
release when the engine starts. If the engine fails to start
within 10 seconds, turn the ignition switch to the LOCK
position, wait 10 to 15 seconds, then repeat the normal
starting procedure.
Tip Start Feature — Automatic Transmission Only
Turn the ignition switch to START position and release it
as soon as the starter engages. The starter motor will
continue to run, but will automatically disengage itself
when the engine is running. If the engine fails to start, the
starter will disengage automatically in 10 seconds. If this
occurs, turn the ignition switch to the LOCK position,
wait 10 to 15 seconds, then repeat the normal starting
procedure.
Extreme Cold Weather (below –20°F or –29°C)
To ensure reliable starting at these temperatures, use of
an externally-powered electric engine block heater (avail-
able from your authorized dealer) is recommended.
Ignition Key Positions
272 STARTING AND OPERATING

If Engine Fails to Start
WARNING!
•Never pour fuel or other flammable liquids into
the throttle body air inlet opening in an attempt to
start the vehicle. This could result in a flash fire
causing serious personal injury.
• Do not attempt to push or tow your vehicle to get
it started. Vehicles equipped with an automatic
transmission cannot be started this way. Unburned
fuel could enter the catalytic converter and once
the engine has started, ignite and damage the
converter and vehicle. If the vehicle has a dis-
charged battery, booster cables may be used to
obtain a start from a booster battery or the battery
in another vehicle. This type of start can be dan-
gerous if done improperly. Refer to Section 6 of
this manual for proper jump starting procedures
and follow them carefully.
Without Tip Start (Manual Transmission Only)
If the engine fails to start after you have followed the
“Normal Starting” or “Extreme Cold Weather” proce-
dures, it may be flooded. Push the accelerator pedal all
the way to the floor and hold it there while cranking the
engine. This should clear any excess fuel in case the
engine is flooded.
CAUTION!
To prevent damage to the starter, do not crank the
engine for more than 15 seconds at a time. Wait 10 to
15 seconds before trying again.
If the engine has been flooded, it may start to run, but not
have enough power to continue running when the key is
released. If this occurs, continue cranking with the accel-
erator pedal pushed all the way to the floor. Release the
accelerator pedal and the key once the engine is running
smoothly.
STARTING AND OPERATING 273
5

If the engine shows no sign of starting after two 15
second periods of cranking with the accelerator pedal
held to the floor, repeat the “Normal Starting” or “Ex-
treme Cold Weather” procedures.
With Tip Start (Automatic Transmission Only)
If the engine fails to start after you have followed the
“Normal Starting” or “Extreme Cold Weather” proce-
dures, it may be flooded. To clear any excess fuel, push
the accelerator pedal all the way to the floor and hold it.
Then, turn the ignition switch to the START position and
release it as soon as the starter engages. The starter motor
will disengage automatically in 10 seconds. Once this
occurs, release the accelerator pedal, turn the ignition
switch to the LOCK position, wait 10 to 15 seconds, then
repeat the normal starting procedure.CAUTION!
To prevent damage to the starter, wait 10 to 15
seconds before trying again.
After Starting
The idle speed will automatically decrease as the engine
warms up.
WARNING!
Do not leave children or animals inside parked
vehicles in hot weather. Interior heat buildup may
cause serious injury or death.
274 STARTING AND OPERATING