JEEP GRAND CHEROKEE 2005 WK / 3.G Owners Manual

UNDERSTANDING YOUR INSTRUMENT PANEL 221
4

The operator can override the AUTO mode setting and
select the direction of the air by rotating the right mode
knob to one of the following positions.
•Defrost
Air is directed to the windshield through the
outlets at the base of the windshield. Air is also
directed to the front door windows through the side
window demister grilles.
•Defrost/Floor
Air flows through the front and rear floor outlets
and the outlets at the base of the windshield. Air
is also directed to the front door windows
through the side window demister grilles.
•Floor
Air flows through the floor outlets located under
the instrument panel and into the rear seating
area through vents under the front seats.
•Bi-Level
Air flows both through the outlets located in the
instrument panel and those located on the floor.
Air flows through the registers in the back of the
center console to the rear seat passengers. These
registers can be closed to block airflow.
•Panel
Air flows through the outlets located in the in-
strument panel. Air flows through the registers in
the back of the center console to the rear seat passen-
gers. These registers can be closed to block airflow.
Depress this button to turn on and off the air
conditioning during manual operation only. Con-
ditioned outside air is then directed through the
outlets selected on the mode control dial. The button
includes an LED that illuminates when manual operation
is selected.
222 UNDERSTANDING YOUR INSTRUMENT PANEL

NOTE:To manually control the air conditioning the
mode selector must be moved out of the AUTO position.
Press this button to turn on the rear window
defroster and the heated side mirrors (if
equipped). An LED in the button will illuminate indicat-
ing that the rear window defroster is ON. The defroster
automatically turns off after approximately 10 minutes of
operation for the first push of the button, and will turn
off after approximately 5 minutes for the second push of
the button.CAUTION!
To avoid damaging the electrical conductors of the
rear window defroster, do not use scrapers, sharp
instruments, or abrasive window cleaners on the
interior surface of the window.
Labels can be peeled off after soaking with warm
water.
This button can be used to block out smoke,
odors, dust, high humidity, or if rapid cooling
is desired. The recirculation mode should only
be used temporarily. The button includes an
LED that illuminates, which indicates that the recircula-
tion mode is active. You may use this feature separately.
UNDERSTANDING YOUR INSTRUMENT PANEL 223
4

NOTE:Extended use of recirculation may cause the
windows to fog. If the interior of the windows begins to
fog, press the “Recirculate” icon button to return to
outside air. Some temp./humidity conditions will cause
captured interior air to condense on windows and ham-
per visibility. For this reason, the system will not allow
“Recirculate” to be selected while in the defrost or
defrost/floor modes. Attempting to use the recirculation
while in these modes will cause the LED in the button to
blink and then turn off.
Summer Operation
The engine cooling system in air conditioned vehicles
must be protected with a high-quality antifreeze coolant
to provide proper corrosion protection and to protect
against engine overheating. A 50% solution of ethylene
glycol antifreeze coolant in water is recommended. Refer
to “Maintenance Procedures” in Section 7 of this manual
for proper coolant selection.
Winter Operation
Use of the air Recirculation mode during winter months
is not recommended because it may cause window
fogging.
NOTE:Refer to the “Operating Tips” chart (for Manual
A/C Control) in this section for suggested control set-
tings in different weather conditions.
Vacation Storage
Anytime you store your vehicle, or keep it out of service
(i.e. vacation) for two weeks or more, run the air condi-
tioning system at idle for about five minutes in the fresh
air and high blower setting. This will insure adequate
system lubrication to minimize the possibility of com-
pressor damage when the system is started again.
224 UNDERSTANDING YOUR INSTRUMENT PANEL

Window Fogging
Interior fogging on the windshield can be quickly re-
moved by turning the mode selector to Defrost. The
Defrost/Floor mode can be used to maintain a clear
windshield and provide sufficient heating. If side win-
dow fogging becomes a problem increase blower speed.
Vehicle windows tend to fog on the inside in mild but
rainy or humid weather.
NOTE:Recirculate without A/C should not be used for
long periods as fogging may occur.
Outside Air Intake
Make sure the air intake, located directly in front of the
windshield, is free of obstructions such as leaves. Leaves
collected in the air intake may reduce airflow and if they
enter the plenum they could plug the water drains. In
winter months make sure the air intake is clear of ice,
slush and snow.
UNDERSTANDING YOUR INSTRUMENT PANEL 225
4

STARTING AND OPERATING
CONTENTS

Starting Procedures.....................230
▫Normal Starting......................230
▫Extreme Cold Weather (Below –20°F (–29°C) . . 231
▫If Engine Fails To Start.................231
▫After Starting........................232

Engine Block Heater — If Equipped.........232

Transmission Shifting....................233
▫5–Speed Automatic Transmission..........233
▫Gear Ranges.........................234▫Rocking The Vehicle...................238

Four-Wheel Drive Operation...............239
▫Quadra-Trac IOperating
Instructions/Precautions — If Equipped.....239
▫Quadra-Trac IIOperating
Instructions/Precautions — If Equipped.....240
▫Shift Positions........................241
▫Shifting Procedures....................242
▫Quadra-DriveSystem — If Equipped......244

Parking Brake.........................244
5

Anti-Lock Brake System..................246

Vari-Lok Rear Axle — If Equipped..........249

On-Road Driving Tips...................249

Off-Road Driving Tips...................250
▫When To Use 4WD Low Range — If
Equipped...........................250
▫Driving Through Water.................250
▫Driving In Snow, Mud And Sand..........251
▫Hill Climbing........................251
▫Traction Downhill.....................252
▫After Driving Off-Road.................253

Multi Displacement System (MDS) - 5.7L
Engine Only..........................254

Tire Safety Information...................254▫Tire Markings........................254
▫Tire Identification Number (TIN)..........258
▫Tire Loading And Tire Pressure...........259

Tires — General Information...............263
▫Tire Inflation Pressures.................264
▫High Speed Operation.................265
▫Radial-Ply Tires......................266
▫Tire Spinning........................266
▫Tread Wear Indicators..................267
▫Replacement Tires.....................267
▫Alignment And Balance.................268

Tire Pressure Monitor System..............269
▫Tire Pressure Monitoring — Base System.....269
228 STARTING AND OPERATING

▫Tire Pressure Monitoring — Premium System. . 271
▫General Information...................275

Tire Chains...........................275

Tire Rotation Recommendations............276

Fuel Requirements......................277
▫3.7/4.7L Engines (If Equipped)............277
▫5.7L Engines (If Equipped)...............277
▫Reformulated Gasoline.................278
▫Gasoline/Oxygenate Blends..............278
▫MMT In Gasoline.....................279
▫Materials Added To Fuel................279
▫Fuel System Cautions..................279
▫Carbon Monoxide Warnings..............280

Fuel Tank Filler Cap (Gas Cap).............281▫Loose Fuel Filler Cap Message............282

Trailer Towing.........................283
▫Trailer And Tongue Weight..............285
▫Trailer Tow Wiring....................286
▫Cooling System Tips—Trailer Towing.......287
▫Trailer Classifications...................288
▫Trailer Towing Capability................289

Recreational Towing (Behind Motorhome, Etc.) . . 290
▫Towing – 2WD Models.................290
▫Towing — Quadra-Trac I (Single-Speed
Transfer Case) 4WD Models..............290
▫Towing — Quadra–Trac II /Quadra–Drive II
4WD Models........................290

Snow Plow...........................293
STARTING AND OPERATING 229
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 build up may
cause serious injury or death.
The gear selector must be in the N (Neutral) or P (Park)
position before you can start the engine. Apply the brakes
before shifting to any driving gear.
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 within10 seconds, turn the key to the OFF position, wait 5
seconds, then repeat the normal starting procedure.
Ignition Key Positions
230 STARTING AND OPERATING