lock JEEP GRAND CHEROKEE 2006 WK / 3.G Repair Manual

NOTE:Regardless of the type of operation, when a
temperature knob is set to the full clockwise or full
counterclockwise position, the system will deliver full
hot or full cold air out of the ducts, respectively.
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. When the Mode is
set to any position other than AUTO, the automatic
control of air temperature is disabled. The user must
adjust the temperature knobs to obtain the desired tem-
perature.
•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. Some airflow is delivered to
the floor while in defrost so that comfort can be
maintained.NOTE:The defrost mode is not automatically selected.
It must be manually selected, when desired.
•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. Some air-
flow is delivered to the floor while in defrost so that
comfort can be maintained.
•Floor
Air flows through the floor outlets located under
the instrument panel and into the rear seating
area through vents under the front seats. Some airflow
is delivered to defrost while in floor mode, so that
comfort can be maintained.
•Bi-Level
Air flows both through the outlets located in the
instrument panel and those located on the floor.
242 UNDERSTANDING YOUR INSTRUMENT PANEL

Air flows through the registers in the back of the
center console, and under the front seats to the rear
seat passengers. These registers can be closed to block
airflow. The center console outlets deliver conditioned
air while the floor outlets deliver heated air.
•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.
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.
UNDERSTANDING YOUR INSTRUMENT PANEL 243
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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.
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.
244 UNDERSTANDING YOUR INSTRUMENT PANEL

STARTING AND OPERATING
CONTENTS

Starting Procedures.....................251
▫Normal Starting......................251
▫Extreme Cold Weather (Below–20°F(–29°C) . . 252
▫If Engine Fails To Start.................252
▫After Starting........................253

Engine Block Heater—If Equipped.........253

Transmission Shifting....................254
▫5–Speed Automatic Transmission..........254
▫Gear Ranges.........................255▫Rocking The Vehicle...................261

Four-Wheel Drive Operation...............262
▫Quadra-Trac IOperating Instructions/Precautions
—If Equipped.......................262
▫Quadra-Trac IIOperating
Instructions/Precautions—If Equipped.....262
▫Shift Positions........................263
▫Shifting Procedures....................264
▫Quadra-Drive IISystem—If Equipped.....267

Parking Brake.........................267
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Anti-Lock Brake System..................269

Power Steering........................272

On-Road Driving Tips...................273

Off-Road Driving Tips...................274
▫When To Use 4WD Low Range—
If Equipped.........................274
▫Driving Through Water.................274
▫Driving In Snow, Mud And Sand..........275
▫Hill Climbing........................276
▫Traction Downhill.....................277
▫After Driving Off-Road.................277

Multi Displacement System (MDS) - 5.7L Engine
Only................................278

Tire Safety Information...................279▫Tire Markings........................279
▫Tire Identification Number (TIN)..........282
▫Tire Loading And Tire Pressure...........283

Ti re s—General Information...............287
▫Tire Pressure.........................287
▫Tire Inflation Pressures.................288
▫Tire Pressures For High Speed Operation....290
▫Radial-Ply Tires......................290
▫Tire Spinning........................290
▫Tread Wear Indicators..................291
▫Life Of Tire.........................292
▫Replacement Tires.....................292
▫Alignment And Balance.................293
248 STARTING AND OPERATING

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.
Extreme Cold Weather (below–20°F(–29°C)
To insure reliable starting at these temperatures, use of an
externally powered electric engine block heater (available
from your authorized 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.NOTE: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.
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.
252 STARTING AND OPERATING

After Starting
The idle speed will automatically decrease as the engine
warms up.
CAUTION!
Long periods of engine idling, especially at high
engine speeds can cause excessive exhaust tempera-
tures which can damage your vehicle. Do not leave
your vehicle unattended with the engine running.
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
grounded, three wire extension cord.
Use the heater when temperatures below 0°F (-18°C) are
expected to last for several days.The engine block heater cord is located:
•3.7L/4.7L Engine—coiled and strapped to the engine
oil dipstick tube.
•5.7L Engine—bundled and fastened to the injector
harness.
WARNING!
Remember to disconnect the cord before driving.
Damage to the 110-115 volt AC electrical cord could
cause electrocution.
STARTING AND OPERATING 253
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WARNING!
It is dangerous to shift the selector lever out of P
(Park) or N (Neutral) if the engine speed is higher
than idle speed. If your foot is not firmly on the
brake pedal, the vehicle could accelerate quickly
forward or in reverse. You could lose control of the
vehicle and hit someone or something. Only shift
into gear when the engine is idling normally and
when your foot is firmly on the brake pedal.
Brake Transmission Shift Interlock System
This vehicle is equipped with a brake transmission shift
interlock system (BTSI) that holds the gearshift lever in
the P (Park) position when the ignition switch is in the
LOCK position. To move the gear selector lever out of the
P (Park) position, the ignition switch must be turned to
the ON position, and the brake pedal must be depressed.
Gear Ranges
NOTE:After selecting any gear range, wait a moment to
allow the selected gear to engage before accelerating.
This is especially important when the engine is cold. If
there is a need to restart the engine be sure to cycle the
key to the LOCK position before restarting. Transmission
gear engagement may be delayed after restarting the
engine if the key is not cycled to the LOCK position first.
P (Park)
Supplements the parking brake by locking the transmis-
sion. The engine can be started in this range. Never use P
(Park) while the vehicle is in motion. Apply the parking
brake when leaving the vehicle in this range.
STARTING AND OPERATING 255
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WARNING!
Unintended movement of a vehicle could injure
those in and near the vehicle. As with all vehicles,
you should never exit a vehicle while the engine is
running. Before exiting a vehicle, you should apply
the park brake, shift the transmission into P (Park),
and remove the key from the ignition. Once the key
is removed from the ignition the transmission shift
lever is locked in the P (Park) position, securing the
vehicle against unwanted movement. Furthermore,
you should never leave children unattended inside a
vehicle.
R (Reverse)
Shift into this range only after the vehicle has come to a
complete stop.
N (Neutral)
No power is transmitted from the engine to the drive
axle. When the brakes are released, the vehicle can roll
freely. Do not engage in N (Neutral) position while
driving except to coast when the vehicle is in danger of
skidding (e.g., on icy roads).
NOTE:Towing the vehicle, coasting, or driving for any
other reason with selector lever in N (Neutral) can result
in severe transmission damage. Refer to“Recreational
Towing”in Section 5 and“Towing a Disabled Vehicle”in
Section 6 of this manual.
D (Drive)
The transmission automatically upshifts through fifth
gear. The D (Drive) position provides optimum driving
characteristics under all normal operating conditions.
Electronic Range Select (ERS)Operation
The Electronic Range Select (ERS) shift control allows
you to move the shifter left (-) or right (+) when the
256 STARTING AND OPERATING

overheating or failure due to excessive shifting. When
operating in“TOW/HAUL”mode, the transmission will
shift to 3rd gear and 4th will be enabled under steady
cruise conditions.
The“TOW/HAUL”light will illuminate in the instru-
ment cluster to indicate when the switch has beenactivated. Pressing the switch a second time restores
normal operation. If the“TOW/HAUL”mode is desired,
the switch must be pressed each time the engine is
started.
Transmission Limp Home Mode
Transmission function is monitored for abnormal condi-
tions. If a condition is detected that could result in
transmission damage, the transmission limp home mode
will be engaged. In this mode, the transmission will
remain in the current gear until the vehicle is brought to
a stop.
To reset the transmission, use the following procedure:
1. Stop the vehicle.
2. Move the shift lever to the P (Park) position.
3. Turn off the engine, be sure to turn the key to the
LOCK position.
Tow/Haul Button
STARTING AND OPERATING 259
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