2008 JEEP GRAND CHEROKEE heater

4 - Way Passenger's Power Seat Ð If Equipped
The front passenger's power seat switches are located on
the outboard side of the passenger seat lower side trim.
The bottom switch controls forward/rearward adjust-
ment. The top switch controls the seatback recline adjust-
ment.
NOTE:The 4 - way seat does not have an up/down
adjustment.
Head Restraints
Head restraints can reduce the risk of whiplash injury in
the event of impact from the rear. Adjustable head
restraints should be adjusted so that the upper edge is as
high as practical. The head restraints have a locking
button which must be pushed in to lower the head
restraint to all positions. The restraints may be raised
without pushing in the button.
Front Heated SeatsÐIf Equipped
Heated seats provide comfort and warmth on cold days
and can help soothe sore muscles and backs. The heaters
provide the same heat level for both cushion and back.
The front driver and passenger seats are heated. The
controls for each heater are located near the bottom
Adjustable Head Restraints
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 107
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center of the instrument panel. After turning on the
ignition, you can choose from High, Low, or Off heat
settings. Amber LEDs on the side of each switch indicate
the level of heat in use. Two LEDs are illuminated for
high, one for low, and none for off. Pressing the switch
once will select high-level heating.Pressing the switch a second time will select low-level
heating. Pressing the switch a third time will shut the
heating elements off.
When high-temperature heating is selected, the heaters
provide a boosted heat level during the first four minutes
of operation after heating is activated. The heat output
then drops to the normal high-temperature level. If
high-level heating is selected, the system will automati-
cally switch to the low level after 30 minutes of continu-
ous operation. At that time, the number of illuminated
LEDs changes from two to one, indicating the change.
Operation on the low setting also turns off automatically
after 30 minutes.
NOTE:Once a heat setting is selected, heat will be felt
within two to five minutes.
Front Heated Seat Switches
108 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

WARNING!
Persons who are unable to feel pain to the skin
because of advanced age, chronic illness, diabetes,
spinal cord injury, medication, alcohol use, exhaus-
tion or other physical condition must exercise care
when using the seat heater. It may cause burns even
at low temperatures, especially if used for long
periods of time.
Do not place anything on the seat that insulates
against heat, such as a blanket or cushion. This may
cause the seat heater to overheat.
Rear Heated Seats Ð If Equipped
On vehicles equipped with rear heated seats, the seats
closest to the doors are heated. The controls for these
seats are located on the rear of the center console.
Rear Heated Seat Switches
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 109
3

Two LEDs are illuminated for high, one for low, and none
for off. Pressing the switch once will select high-level
heating. Pressing the switch a second time will select
low-level heating. Pressing the switch a third time will
shut the heating elements off.
When high-temperature heating is selected, the heaters
provide a boosted heat level during the first four minutes
of operation after heating is activated. The heat output
then drops to the normal high-temperature level. If
high-level heating is selected, the system will automati-
cally switch to the low level after 30 minutes of continu-
ous operation. At that time, the number of illuminated
LEDs changes from two to one, indicating the change.
Operation on the low setting also turns off automatically
after 30 minutes.
NOTE:Once a heat setting is selected, heat will be felt
within two to five minutes.WARNING!
Persons who are unable to feel pain to the skin
because of advanced age, chronic illness, diabetes,
spinal cord injury, medication, alcohol use, exhaus-
tion or other physical condition must exercise care
when using the seat heater. It may cause burns even
at low temperatures, especially if used for long
periods of time.
Do not place anything on the seat that insulates
against heat, such as a blanket or cushion. This may
cause the seat heater to overheat.
110 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

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
9DTS9and9DTS 2.09are trademarks of Digital Theater
Systems, Inc.
SALES CODE REN Ð MULTIMEDIA SYSTEM Ð IF
EQUIPPED
NOTE:The sales code is located on the lower right side
of the unit's faceplate.The REN multimedia system contains a radio, CD/DVD
player, USB port, a 20 gigabyte Hard Drive (HDD), and a
ªJukeBoxº (virtual CD changer). Sirius Satellite Radio is
optional. The 6.5-inch touch screen allows for easy menu
selection.
A 20 gigabyte Hard Drive (HDD) allows uploads of
music and photos from CDs or through the USB port.
While the Gracenote database finds the artist, track, and
title for the music.
An auxiliary input jack permits passengers to listen to a
portable MP3 player through the vehicle's speakers. For
vehicles equipped with the Vehicle Entertainment System
(VES), separate audio outputs allow passengers to listen
to the car speakers while different audio tracks play
through the system's wireless headphones. This means
rear seat passengers can watch a DVD on the optional
rear-seat entertainment system while the driver and front
seat passenger listen to the radio.
212 UNDERSTANDING YOUR INSTRUMENT PANEL

Normal Starting
The gear selector must be in the ªNº (Neutral) or ªPº
(Park) position before you can start the engine. Apply the
brakes before shifting into any driving gear.
NOTE:Normal starting of either a cold or a warm
engine is obtained without pumping or depressing the
accelerator pedal.
Do notpress the accelerator. Use the Fob with Integrated
Key to briefly turn the ignition switch to the START
position and release it as soon as the starter engages. The
starter motor will continue to run, and it will disengage
automatically 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.
Extremely Cold Weather (below220ÉF or229ÉC)
To insure reliable starting at these temperatures, use of an
externally powered electric engine block heater (available
from your dealer) is recommended.
STARTING AND OPERATING 243
5

IF YOUR ENGINE OVERHEATS
In any of the following situations, you can reduce the
potential for overheating by taking the appropriate ac-
tion.
²On the highways Ð Slow down.
²In city traffic Ð While stopped, put transmission in N
(Neutral), but do not increase engine idle speed.
NOTE:There are steps that you can take to slow down
an impending overheat condition. If your air conditioner
is on, turn it off. The air conditioning system adds heat to
the engine cooling system and turning off the A/C
removes this heat. You can also turn the Temperature
Control to maximum heat, the Mode Control to floor, and
the Fan Control to High. This allows the heater core to act
as a supplement to the radiator and aids in removing heat
from the engine cooling system.
CAUTION!
Driving with a hot cooling system could damage
your vehicle. If the temperature gauge reads ªHº,
pull over and stop the vehicle. Idle the vehicle with
the air conditioner turned off until the pointer drops
back into the normal range. If the pointer remains on
the ªHº, and you hear continuous chimes, turn the
engine off immediately, and call for service.
WHAT TO DO IN EMERGENCIES 299
6

1. Remove all metal jewelry such as watch bands or
bracelets which might make an unintended electrical
contact.
2. Park the booster vehicle within cable reach but with-
out letting the vehicles touch. Set the parking brake on
both vehicles, place the transmission in P (Park), and turn
the ignition OFF.
3. Turn off the heater, radio, and all unnecessary electri-
cal loads.
4. Connect one end of a jumper cable to the positive
terminal of the booster battery. Connect the other end of
the same cable to the positive terminal of the discharged
battery.WARNING!
Do not permit vehicles to touch each other as this
could establish a ground connection and personal
injury could result.
5. Connect the other cable, first to the negative terminal
of the booster battery and then to the engine of the
vehicle with the discharged battery. Make sure you have
a good contact on the engine.
6. Start the engine in the vehicle which has the booster
battery, let the engine idle a few minutes, then start the
engine in the vehicle with the discharged battery.
7. When removing the jumper cables, reverse the above
sequence exactly. Be careful of the moving belts and fan.
WHAT TO DO IN EMERGENCIES 301
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