2008 JEEP GRAND CHEROKEE service

INTRODUCTION
This manual has been prepared with the assistance of
service and engineering specialists to acquaint you with
the operation and maintenance of your new vehicle. It is
supplemented by a Warranty Information Booklet and
various customer oriented documents. You are urged to
read these publications carefully. Following the instruc-
tions and recommendations in this manual will help
assure safe and enjoyable operation of your vehicle.
NOTE: After you read the manual, it should be stored
in the vehicle for convenient reference and remain with
the vehicle when sold, so that the new owner will be
aware of all safety warnings.
When it comes to service, remember that your dealer
knows your vehicle best, has the factory-trained techni-
cians and genuine Mopartparts, and is interested in
your satisfaction.
ROLLOVER WARNING
Utility vehicles have a significantly higher rollover rate
than other types of vehicles. This vehicle has a higher
ground clearance, and a higher center of gravity than
many passenger cars. Driven in an unsafe manner, all
vehicles can be caused to go out of control. Because of the
higher center of gravity, if this vehicle is out of control it
may rollover when some other vehicles may not.
Do not attempt sharp turns or abrupt maneuvers or other
unsafe driving actions that can cause loss of vehicle
control. Failure to operate this vehicle safely may result
in an accident, rollover of the vehicle, and severe or fatal
injury. Drive carefully.
4 INTRODUCTION

NProgramming Additional Transmitters........23
NTransmitter Battery Service...............23
NGeneral Information....................24
mRemote Starting System Ð If Equipped........24
mDoor Locks............................26
NManual Door Locks.....................26
NPower Door Locks.....................27
NChild Protection Door Lock...............28
mWindows.............................29
NPower Windows.......................29
NWind Buffeting........................31
mLiftgate...............................32
NLiftgate Flipper Glass...................33mOccupant Restraints......................34
NLap/Shoulder Belts.....................36
NLap/Shoulder Belt Operating Instructions.....37
NAdjustable Upper Shoulder Belt Anchorage....40
NAutomatic Locking Mode Ð If Equipped.....41
NEnergy Management Feature..............41
NSeat Belt Pretensioners...................42
NEnhanced Seat Belt Use Reminder System
(BeltAlert)...........................42
NSeat Belts And Pregnant Women............44
NSeat Belt Extender......................44
NDriver And Front Passenger Supplemental
Restraint Systems (SRS)..................45
NChild Restraint........................56
10 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

Ignition Key Removal
Place the selector lever in ªPº (Park). Turn the key to the
LOCK position, and remove the key.
NOTE:
²If you try to remove the key before you place the
selector lever in ªPº (Park), it may become trapped
temporarily in the ignition switch. If this occurs, rotate
the key to the right slightly, then remove the key as
described. If a malfunction occurs, the system will trap
the key in the ignition switch to warn you that this
safety feature is inoperable. The engine can be started
and stopped, but the key cannot be removed until you
obtain service.
²For vehicles equipped with the Electronic Vehicle
Information Center (EVIC), the power window
switches, radio, power sunroof (if equipped), and
power outlets will remain active for up to 60 minutesafter the ignition switch is turned to the LOCK posi-
tion. Opening either front door will cancel this feature.
The time for this feature is programmable. For details,
refer to ªDelay Power Off to Accessories Until Exit,º
under ªPersonal Settings (Customer Programmable
Features),º under ªElectronic Vehicle Information
Center (EVIC)º in Section 4 of this manual.
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. Don't leave the keys in the
ignition. A child could operate power windows,
other controls, or move the vehicle.
14 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

location. This number is required for dealer replacement
of Fobs. Duplication of Fobs may be performed at an
authorized dealer or by using the Customer Key Pro-
gramming procedure. This procedure consists of pro-
gramming a blank Fob to the vehicle electronics. A blank
Fob is one, which has never been programmed.
NOTE: When having the Sentry Key Immobilizer
System serviced, bring all vehicle Fobs with you to the
dealer.
Customer Key (Fob) Programming
If you have two valid sentry keys, you can program new
sentry keys to the system by performing the following
procedure:
1. Insert the first valid key into the ignition switch and
turn the ignition switch ON for at least 3 seconds but no
longer than 15 seconds. Turn the ignition switch OFF and
remove the first key.2. Insert the second valid key and turn the ignition
switch ON within 15 seconds. After ten seconds, a chime
will sound and the Vehicle Security Alarm Indicator
Light will begin to flash. Turn the ignition switch OFF
and remove the second key.
3. Insert a blank Sentry Key into the ignition switch and
turn the ignition switch ON within 60 seconds. After 10
seconds, a single chime will sound and the Vehicle
Security Alarm Indicator Light will stop flashing, turn on
again for 3 seconds, and then turn off.
The new Sentry Key is programmed.The Keyless Entry
Transmitter will also be programmed during this pro-
cedure.
Repeat this procedure to program up to 8 keys. If you do
not have a programmed sentry key, contact your dealer
for details.
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 17
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NOTE:If a programmed key is lost, see your dealer to
have all remaining keys erased from the systems
memory. This will prevent the lost key from starting your
vehicle. The remaining keys must then be repro-
grammed. All vehicle keys must be taken to the dealer at
the time of service to be reprogrammed.
General Information
The Sentry Key system complies with FCC rules part 15
and with RSS-210 of Industry Canada. Operation is
subject to the following conditions:
²This device may not cause harmful interference.
²This device must accept any interference that may be
received, including interference that may cause undes-
ired operation.
SECURITY ALARM SYSTEM Ð IF EQUIPPED
This system monitors the vehicle doors, liftgate, liftgate
flipper glass, and ignition for unauthorized operation
and movement inside of the vehicle. When the alarm is
activated, the system provides both audible and visual
signals. The horn will sound repeatedly for three minutes
and the headlights and taillights will flash for an addi-
tional 15 minutes.
To Set the Alarm
The alarm will set when you use the remote keyless entry
transmitter to lock the doors and liftgate or when you use
the power door lock switch while the door is open. After
all the doors are locked and closed, a red light (located in
the instrument cluster) will flash rapidly for about 16
seconds to signal that the system is arming. During this
16 second pre-arm period, opening any door or the
liftgate will cancel the arming. If the system successfully
arms, the red light will flash at a slower rate to indicate
the alarm is set. A manual lock of the doors, either with
18 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

²You may need to be less than 23 feet (7 meters) from
the vehicle when using the transmitter to turn off the
panic alarm due to the radio frequency noises emitted
by the system.
Programming Additional Transmitters
Refer to SENTRY KEY ªCustomer Key (Fob) Program-
ming.º
If you do not have a programmed transmitter, contact
your dealer for details.
Transmitter Battery Service
The recommended replacement battery is one CR2032
battery.
NOTE:P
erchlorate Material Ð special handling may
apply. See www.dtsc.ca.gov/hazardouswaste/perchlorate
NOTE:Do not touch the battery terminals that are on
the back housing or the printed circuit board.1. Battery access is through a door located on the rear of
the FOBIK. Insert a small, flat bladed screwdriver into the
slot and gently pry open the access door.
FOBIK Battery Replacement
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 23
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WARNING!
²The belt and retractor assembly must be replaced
if the seat belt assembly ªautomatic locking retrac-
torº feature or any other seat belt function is not
working properly when checked according to the
procedures in the Service Manual.
²Failure to replace the belt and retractor assembly
could increase the risk of injury in collisions.
Seat Belt Pretensioners
The driver and front passenger seat belts are equipped
with a pretensioning device that is designed to remove
any slack from the seat belt systems in the event of a
collision. This device improves the performance of the
seat belt by assuring that the belt is tight around the
occupant early in a collision. Pretensioners work for all
size occupants, including those in child restraints.NOTE:These devices are not a substitute for proper seat
belt placement by the occupant. The seat belt must still be
worn snugly and positioned properly.
The pretensioners are triggered by the Occupant Re-
straint Control (ORC) Module. Like the front airbags, the
pretensioners are a single use item. After a collision that
is severe enough to deploy the airbags and pretensioners,
they must be replaced.
Enhanced Seat Belt Use Reminder System
(BeltAlert)
If the driver's seat belt has not been buckled within 60
seconds of starting the vehicle and if the vehicle speed is
greater than 5 mph (8 km/h), the Enhanced Warning
System (BeltAlert) will alert the driver to buckle their seat
belt. The driver should also instruct all other occupants to
buckle their seat belts. Once the warning is triggered, the
Enhanced Warning System (BeltAlert) will continue to
chime and flash the Seat Belt Warning Light for 96
42 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

Maintaining Your Airbag System
WARNING!
²Modifications to any part of the airbag system
could cause it to fail when you need it. You could
be injured if the airbag system is not there to
protect you. Do not modify the components or
wiring, including adding any kind of badges or
stickers to the steering wheel hub trim cover or
the upper right side of the instrument panel. Do
not modify the front bumper or vehicle body
structure.
²You need proper knee impact protection in a
collision. Do not mount or locate any aftermarket
equipment on or behind the knee bolsters.
²It is dangerous to try to repair any part of the
airbag system yourself. Be sure to tell anyone
who works on your vehicle that it has an airbag
system.
NOTE:Perchlorate Material ± special handling may apply,
See www.dtsc.ca.gov/hazardouswaste/perchlorate
Airbag Warning Light
You will want to have the airbag system ready to inflate
for your protection in an impact. The airbag system is
designed to be maintenance free. If any of the following
occurs, have an authorized dealer service the system
promptly:
²The light does not come on during the 6 to 8 seconds
after the ignition switch is first turned on.
²The light remains on after the 6 to 8 second interval.
²The light comes on for any period of time while
driving.
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 53
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