JEEP WRANGLER 2007 JK / 3.G Owners Manual

STARTING AND OPERATING
CONTENTS
Starting Procedures.....................265
▫Manual Transmission..................265
▫Automatic Transmission................265
▫Normal Starting......................265
▫Extreme Cold Weather
(Below –20°F Or –29°C).................266
▫If Engine Fails To Start.................266
▫After Starting........................268
Engine Block Heater — If Equipped.........269Manual Transmission....................269
▫6-Speed Manual Transmission............269
Automatic Transmission..................273
▫Shift Lock Manual Override..............274
▫Brake/Transmission Interlock System.......275
▫Automatic Transmission With Overdrive.....275
Four–Wheel Drive Operation (Command-Trac™
Or Rock-Trac™) — If Equipped.............280
▫Operating Instructions/Precautions.........280
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▫Shift Positions........................282
▫Shifting Procedure....................283
Trac-Lok™ Rear Axle — If Equipped.........284
Axle Lock (Tru–Lok™) — Rubicon Models.....285
Rear Axle Lock — 4WD Non-Rubicon Models
(If Equipped)..........................286
Electronic Sway Bar Disconnect — If Equipped . . 287
On-Road Driving Tips...................289
Off-Road Driving Tips...................290
▫When To Use 4L (Low) Range............290
▫Driving Through Water.................291
▫Driving In Snow, Mud And Sand..........292
▫Hill Climbing........................292▫Traction Downhill.....................293
▫After Driving Off-Road.................294
Parking Brake.........................295
Anti-Lock Brake System..................296
Power Steering........................298
Tire Safety Information...................300
▫Tire Markings........................300
▫Tire Identification Number (TIN)..........303
▫Tire Loading And Tire Pressure...........304
Tires — General Information...............308
▫Tire Pressure.........................308
▫Tire Inflation Pressures.................309
▫Tire Pressures For High Speed Operation....311
262 STARTING AND OPERATING

▫Radial-Ply Tires......................312
▫Tire Spinning........................312
▫Tread Wear Indicators..................312
▫Life Of Tire.........................313
▫Replacement Tires.....................314
▫Alignment And Balance.................315
Tire Chains...........................315
Tire Rotation Recommendations............316
Tire Pressure Monitor System (TPMS) — If
Equipped............................317
▫Base System — If Equipped..............318
▫General Information...................321
Fuel Requirements......................321▫Reformulated Gasoline.................322
▫Gasoline/Oxygenate Blends..............322
▫MMT In Gasoline.....................323
▫Materials Added To Fuel................323
▫Fuel System Cautions..................324
▫Carbon Monoxide Warnings..............324
Adding Fuel..........................325
▫Fuel Filler Cap (Gas Cap)...............325
Vehicle Loading........................328
▫Certification Label.....................328
Trailer Towing.........................330
▫Common Towing Definitions.............330
▫Trailer Hitch Classification...............334
STARTING AND OPERATING 263
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▫Trailer Towing Weights (Maximum Trailer
Weight Ratings)......................335
▫Trailer And Tongue Weight..............338
▫Towing Requirements..................339
▫Towing Tips.........................344Recreational Towing (Behind Motorhome, Etc.) . . 346
▫Towing – 2WD Models.................346
▫Towing – 4WD Models.................346
▫Shifting Out Of Neutral (N)..............347
264 STARTING AND OPERATING

STARTING PROCEDURES
Before starting your vehicle, adjust your seat, adjust both
inside and outside mirrors, and fasten your seat belts.
WARNING!
Never leave children alone in a vehicle. Leaving
children in a vehicle unattended is dangerous for a
number of reasons. A child or others could be seri-
ously or fatally injured. Do not leave the keys in the
ignition. A child could operate power windows,
other controls, or move the vehicle.
Manual Transmission
Apply the parking brake, place the gearshift control lever
in N (Neutral) and depress the clutch pedal before
starting vehicle. 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 selector lever in the N (Neutral)
or P (Park) position. Apply the brake before shifting to
any driving range.
Normal Starting
Normal starting of either a cold or a warm engine is
obtained without pumping or depressing the accelerator
pedal. Turn the key to the START position and release
when the engine starts. If the engine fails to start within
10 seconds, turn the key to the OFF position, wait 5
seconds, then repeat the normal starting procedure.
STARTING AND OPERATING 265
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Tip Start Feature — Automatic Transmission Only
Do notpress the accelerator. Turn the ignition key briefly
to START position, and release it. The starter motor will
continue to run, but will automatically disengage itself
when the engine is running.
Extreme Cold Weather (below –20°F or –29°C)
To insure reliable starting at these temperatures, use of an
externally powered electric engine block heater (available
from your dealer) is recommended.
If Engine Fails to Start
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.
Ignition Key Positions
266 STARTING AND OPERATING

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.
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.
WARNING!
Do not attempt to push or tow your vehicle to get it
started. Vehicles equipped with an automatic trans-
mission 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 discharged 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 dangerous if done improperly.
Refer to Section 6 of this manual for proper jump
starting procedures and follow them carefully.
STARTING AND OPERATING 267
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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.
If the engine shows no sign of starting after two 15
second periods of cranking with the accelerator pedal
held to the floor, the “Normal Starting” or “Extreme Cold
Weather” procedures should be repeated.
After Starting
The idle speed will automatically decrease as the engine
warms up.
WARNING!
Never leave children alone in a vehicle. Leaving
children in a vehicle unattended is dangerous for a
number of reasons. A child or others could be seri-
ously or fatally injured. Do not leave the keys in the
ignition. A child could operate power windows,
other controls, or move the vehicle.
268 STARTING AND OPERATING

ENGINE BLOCK HEATER — IF EQUIPPED
The engine block heater warms engine coolant and
permits quicker starts in cold weather. Connect the cord
to a standard 110-115 volt AC electrical outlet with a
grounded, three wire extension cord. The engine block
heater cord is found under the hood bundled in front of
the battery tray.
WARNING!
Remember to disconnect the cord before driving.
Damage to the 110-115 volt AC electrical cord could
cause electrocution.
Use the heater when temperatures below 0°F (-18°C) are
expected to last for several days.
MANUAL TRANSMISSION
6-Speed Manual Transmission
WARNING!
You or others could be injured if you leave the
vehicle unattended without having the parking
brake fully applied. The parking brake should al-
ways be applied when the driver is not in the vehicle,
especially on an incline.
STARTING AND OPERATING 269
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Follow the shift pattern on the gearshift knob.
NOTE:The backup lights will come on when your
vehicle is in R (Reverse) gear and the ignition is in the ON
position.WARNING!
When parking your vehicle, always leave a manual
transmission in first gear and apply the parking
brake fully to guard against vehicle movement and
possible injury or damage. Never use any gear as a
substitute for the parking brake.
CAUTION!
To drive as safely as possible and to prolong the life
of your manual transmission, follow these tips:
•Before shifting from a forward gear into reverse, or
from reverse to a forward gear, stop vehicle com-
pletely. Otherwise, transmission damage may result.
Manual Shift Controls
270 STARTING AND OPERATING