2018 JEEP GRAND CHEROKEE ECU

Switchable Automatic Locking Retractors
(ALR) — (If Equipped)
The seat belts in the passenger seating posi-
tions may be equipped with a Switchable
Automatic Locking Retractor (ALR) which is
used to secure a child restraint system. For
additional information, refer to “Installing
Child Restraints Using The Vehicle Seat
Belt” under the “Child Restraints” section of
this manual. The figure below illustrates the
locking feature for each seating position.If the passenger seating position is equipped
with an ALR and is being used for normal
usage, only pull the seat belt webbing out far
enough to comfortably wrap around the occu-
pant’s mid-section so as to not activate the
ALR. If the ALR is activated, you will hear a
clicking sound as the seat belt retracts. Allow
the webbing to retract completely in this case
and then carefully pull out only the amount of
webbing necessary to comfortably wrap
around the occupant’s mid-section. Slide the
latch plate into the buckle until you hear a
"click."
In Automatic Locking Mode, the shoulder
belt is automatically pre-locked. The seat
belt will still retract to remove any slack in
the shoulder belt. Use the Automatic Locking
Mode anytime a child restraint is installed in
a seating position that has a seat belt with
this feature. Children 12 years old and under
should always be properly restrained in the
rear seat of a vehicle with a rear seat.
WARNING!
• NEVER use a rearward facing child re-
straint on a seat protected by an ACTIVE
AIRBAG in front of it, DEATH or SERI-
OUS INJURY to the CHILD can occur.
• Only use a rear-facing child restraint in
the rear seat of a vehicle with a rear seat.
• A deploying passenger front air bag can
cause death or serious injury to a child
12 years or younger, including a child in
a rear-facing child restraint.
How To Engage The Automatic Locking Mode
1. Buckle the combination lap and shoulder
belt.
2. Grasp the shoulder portion and pull down-
ward until the entire seat belt is extracted.
3. Allow the seat belt to retract. As the seat
belt retracts, you will hear a clicking
sound. This indicates the seat belt is now
in the Automatic Locking Mode.
ALR — Switchable Automatic Locking
Retractor
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106

WARNING!
• Improper installation can lead to failure
of an infant or child restraint. It could
come loose in a collision. The child
could be badly injured or killed. Follow
the child restraint manufacturer’s direc-
tions exactly when installing an infant or
child restraint.
• After a child restraint is installed in the
vehicle, do not move the vehicle seat
forward or rearward because it can
WARNING!
loosen the child restraint attachments.
Remove the child restraint before ad-
justing the vehicle seat position. When
the vehicle seat has been adjusted, re-
install the child restraint.
• When your child restraint is not in use,
secure it in the vehicle with the seat belt
or ISOFIX anchorages, or remove it from
the vehicle. Do not leave it loose in the
vehicle. In a sudden stop or accident, it
WARNING!
could strike the occupants or seatbacks
and cause serious personal injury.
Suitability Of Passenger Seats For Universal
Child Restraint System Use
According to the European Directive 2000/3/
EC, the suitability of each passenger seat
position for the installation of Universal Child
Restraint Systems is shown in the following
table:
Mass GroupUniversal Child Seating Position Chart (or other site)
Front Passenger Rear Outboard Rear Center Intermediate Outboard Intermediate Center
Group0-Upto10kg XU/UF UF N/A N/A
Group 0+ - Up to 13 kgX U/UF UF N/A N/A
Group1-9to18kg XU/UF UF N/A N/A
Group II & III - 15 to
36 kgX U/UF UF N/A N/A
Key of letters used in the table above:
•
U = Suitable for “universal” category restraints
approved for use in this mass group.
• X = Seat position not suitable for children
in this mass group.
• UF = Suitable for forward-facing “univer-
sal” category restraints approved for use in
this mass group.If the head restraint interferes with the instal-
lation of the child restraint system, adjust the
head restraint (if adjustable).
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122

Center Arm Rest Tether
For rear-facing child restraints secured in the
center seat position with the vehicle seat
belts, the rear center seat position has an
armrest tether that secures the arm rest in the
upward position.
1. To access the center seat arm rest tether,
first lower the arm rest. The tether is
located behind the armrest and hooked
onto the plastic seat backing.2. Pull down on the tether to unhook it from
the plastic seat backing.
3. Raise the armrest and attach the tether
hook to the strap located on the front of
the arm rest.
Suitability Of Passenger Seats For ISOFIX
Child Restraint System Use
The table below shows the various installa-
tion possibilities for ISOFIX child restraint
systems on seats fitted with ISOFIX anchor-
ages in accordance with European standard
ECE 16.
Center Seat Position Arm Rest Tether
Center Seat Position Arm Rest Tether
Attached
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6. Remove slack in the tether strap accord-
ing to the child restraint manufacturer’s
instructions.
WARNING!
• The top tether anchorages are not visible
until the gap panel is folded down. Do
not use the visible cargo tie down hooks,
located on the floor behind the seats, to
attach a child restraint tether anchor.
• An incorrectly anchored tether strap
could lead to increased head motion and
possible injury to the child. Use only the
anchorage position directly behind the
child seat to secure a child restraint top
tether strap.
• If your vehicle is equipped with a split
rear seat, make sure the tether strap
does not slip into the opening between
the seatbacks as you remove slack in the
strap.
Installing Child Restraints Using The Ve-
hicle Seat Belt
Child restraint systems are designed to be
secured in vehicle seats by lap belts or the lap
belt portion of a lap/shoulder belt.
WARNING!
• Improper installation or failure to prop-
erly secure a child restraint can lead to
failure of the restraint. The child could
be badly injured or killed.
• Follow the child restraint manufacturer’s
directions exactly when installing an in-
fant or child restraint.
The seat belts in the rear passenger seating
positions are equipped with a Switchable
Automatic Locking Retractor (ALR) that is
designed to keep the lap portion of the seat
belt tight around the child restraint. The ALR
retractor can be “switched” into a locked
mode by pulling all of the webbing out of the
retractor and then letting the webbing retract
back into the retractor. If it is locked, the ALR
will make a clicking noise while the webbing
is pulled back into the retractor. Refer to the“Automatic Locking Mode” description in
“Switchable Automatic Locking Retractors
(ALR)” under “Occupant Restraint Systems”
for additional information on ALR.
How To Stow An Unused Switchable-ALR
(ALR) Seat Belt:
When using the ISOFIX attaching system to
install a child restraint, stow all ALR seat
belts that are not being used by other occu-
pants or being used to secure child restraints.
An unused belt could injure a child if they
play with it and accidentally lock the seat belt
retractor. Before installing a child restraint
using the ISOFIX system, buckle the seat belt
behind the child restraint and out of the
child’s reach. If the buckled seat belt inter-
feres with the child restraint installation, in-
stead of buckling it behind the child re-
straint, route the seat belt through the child
restraint belt path and then buckle it. Do not
lock the seat belt. Remind all children in the
vehicle that the seat belts are not toys and
that they should not play with them.
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Installing A Child Restraint With A Switch-
able Automatic Locking Retractor (ALR)
Child restraint systems are designed to be
secured in vehicle seats by lap belts or the
lap belt portion of a lap/shoulder belt.
WARNING!
• Improper installation or failure to prop-
erly secure a child restraint can lead to
failure of the restraint. The child could
be badly injured or killed.
• Follow the child restraint manufactur-
er’s directions exactly when installing an
infant or child restraint.
1. Place the child seat in the center of the
seating position. For some second row
seats, you may need to recline the seat
and/or raise the head restraint to get a
better fit. If the rear seat can be moved
forward and rearward in the vehicle, you
may wish to move it to its rear-most posi-
tion to make room for the child seat. Youmay also move the front seat forward to
allow more room for the child seat.
2. Pull enough of the seat belt webbing from
the retractor to pass it through the belt
path of the child restraint. Do not twist the
belt webbing in the belt path.
3. Slide the latch plate into the buckle until
you hear a “click.”
4. Pull on the webbing to make the lap
portion tight against the child seat.
5. To lock the seat belt, pull down on the
shoulder part of the belt until you have
pulled all the seat belt webbing out of the
retractor. Then, allow the webbing to re-
tract back into the retractor. As the web-
bing retracts, you will hear a clicking
sound. This means the seat belt is now in
the Automatic Locking mode.
6. Try to pull the webbing out of the retractor.
If it is locked, you should not be able to
pull out any webbing. If the retractor is
not locked, repeat step 5.7. Finally, pull up on any excess webbing to
tighten the lap portion around the child
restraint while you push the child restraint
rearward and downward into the vehicle
seat.
8. Test that the child restraint is installed
tightly by pulling back and forth on the
child seat at the belt path. It should not
move more than 25 mm in any direction.
Any seat belt system will loosen with time, so
check the belt occasionally, and pull it tight if
necessary.
Transporting Pets
Air Bags deploying in the front seat could
harm your pet. An unrestrained pet will be
thrown about and possibly injured, or injure a
passenger during panic braking or in a colli-
sion.
Pets should be restrained in the rear seat in
pet harnesses or pet carriers that are secured
by seat belts.
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Front seat belt assemblies must be replaced
after a collision. Rear seat belt assemblies
must be replaced after a collision if they have
been damaged (i.e., bent retractor, torn web-
bing, etc.). If there is any question regarding
seat belt or retractor condition, replace the
seat belt.
Air Bag Warning Light
The Air Bag warning lightwill turn on for
four to eight seconds as a bulb check when
the ignition switch is first turned to ON/RUN.
If the light is either not on during starting,
stays on, or turns on while driving, have the
system inspected at your authorized dealer as
soon as possible. After the bulb check, this
light will illuminate with a single chime when
a fault with the Air Bag System has been
detected. It will stay on until the fault is
removed. If the light comes on intermittently
or remains on while driving, have your autho-
rized dealer service the vehicle immediately.
Refer to “Occupant Restraint Systems” in
“Safety” for further information.
Defroster
Check operation by selecting the defrost
mode and place the blower control on high
speed. You should be able to feel the air
directed against the windshield. See your
authorized dealer for service if your defroster
is inoperable.
Floor Mat Safety Information
Always use floor mats designed to fit your
vehicle. Only use a floor mat that does not
interfere with the operation of the accelera-
tor, brake or clutch pedals. Only use a floor
mat that is securely attached using the floor
mat fasteners so it cannot slip out of position
and interfere with the accelerator, brake or
clutch pedals or impair safe operation of your
vehicle in other ways.
WARNING!
An improperly attached, damaged, folded,
or stacked floor mat, or damaged floor mat
fasteners may cause your floor mat to
interfere with the accelerator, brake, or
clutch pedals and cause a loss of vehicle
WARNING!
control. To prevent SERIOUS INJURY or
DEATH:
• ALWAYS securely attach
your floor
mat using the floor mat fasteners. DO
NOT install your floor mat upside down
or turn your floor mat over. Lightly pull to
confirm mat is secured using the floor
mat fasteners on a regular basis.
• ALWAYS REMOVE THE EXISTING
FLOOR MAT FROM THE VEHICLE
before installing any other floor mat.
NEVER install or stack an additional
floor mat on top of an existing floor mat.
• ONLY install floor mats designed to fit
your vehicle. NEVER install a floor mat
that cannot be properly attached and
secured to your vehicle. If a floor mat
needs to be replaced, only use a FCA
approved floor mat for the specific
make, model, and year of your vehicle.
• ONLY use the driver’s side floor mat on
the driver’s side floor area. To check for
interference, with the vehicle properly
parked with the engine off, fully depress
the accelerator, the brake, and the
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132

WARNING!
clutch pedal (if present) to check for
interference. If your floor mat interferes
with the operation of any pedal, or is not
secure to the floor, remove the floor mat
from the vehicle and place the floor mat
in your trunk.
• ONLY use the passenger’s side floor mat
on the passenger’s side floor area.
• ALWAYS make sure objects cannot fall
or slide into the driver’s side floor area
when the vehicle is moving. Objects can
become trapped under accelerator,
brake, or clutch pedals and could cause
a loss of vehicle control.
• NEVER place any objects under the floor
mat (e.g., towels, keys, etc.). These ob-
jects could change the position of the
floor mat and may cause interference
with the accelerator, brake, or clutch
pedals.
• If the vehicle carpet has been removed
and re-installed, always properly attach
WARNING!
carpet to the floor and check the floor
mat fasteners are secure to the vehicle
carpet. Fully depress each pedal to
check for interference with the accelera-
tor, brake, or clutch pedals then re-
install the floor mats.
• It is recommended to only use mild soap
and water to clean your floor mats. After
cleaning, always check your floor mat
has been properly installed and is se-
cured to your vehicle using the floor mat
fasteners by lightly pulling mat.
Periodic Safety Checks You Should Make
Outside The Vehicle
Tires
Examine tires for excessive tread wear and
uneven wear patterns. Check for stones,
nails, glass, or other objects lodged in the
tread or sidewall. Inspect the tread for cuts
and cracks. Inspect sidewalls for cuts,cracks, and bulges. Check the wheel nuts for
tightness. Check the tires (including spare)
for proper cold inflation pressure.
Lights
Have someone observe the operation of brake
lights and exterior lights while you work the
controls. Check turn signal and high beam
indicator lights on the instrument panel.
Door Latches
Check for proper closing, latching, and lock-
ing.
Fluid Leaks
Check area under the vehicle after overnight
parking for fuel, coolant, oil, or other fluid
leaks. Also, if gasoline fumes are detected or
if fuel, or brake fluid leaks are suspected. The
cause should be located and corrected
immediately.
133

9. Press and hold the brake pedal. Shift the
transmission back into NEUTRAL.
10. Firmly apply the parking brake.
11. With the transmission and transfer case
in NEUTRAL, push and hold the EN-
GINE START/STOP button until the en-
gine turns off.
12. Place the transmission gear selector in
PARK. Release the brake pedal.
13. Push the ENGINE STOP/START button
twice (without pressing the brake pedal),
to turn the ignition to the OFF mode.
14. Release the parking brake only when the
vehicle is securely attached to a tow
vehicle.
NOTE:
If shift conditions/interlocks are not met, a
“To Tow Vehicle Safely, Read Neutral Shift
Procedure in Owner’s Manual” message will
flash from the instrument cluster display.
Refer to “Instrument Cluster Display” in
“Getting To Know Your Instrument Panel” for
further information.Shifting Out Of NEUTRAL (N)
Use the following procedure to prepare your
vehicle for normal usage.
1. Bring the vehicle to a complete stop.
2. Firmly apply the parking brake.
3. Start the engine.
4. Press and hold the brake pedal.
5. Shift the transmission into NEUTRAL.
6. Using a ballpoint pen or similar object,
push and hold the recessed transfer case
NEUTRAL (N) button (located by the se-
lector switch) for one second.7. When the NEUTRAL (N) indicator light
turns off, release the NEUTRAL (N)
button.
8. After the NEUTRAL (N) button has been
released, the transfer case will shift to the
position indicated by the selector switch.
Quadra-Drive II System — If Equipped
The optional Quadra-Drive II System features
two torque transfer couplings. The couplings
include an Electronic Limited-Slip Differen-
tial (ELSD) rear axle and the Quadra-Trac II
transfer case. The optional ELSD axle is fully
automatic and requires no driver input to
operate. Under normal driving conditions,
the unit functions as a standard axle, balanc-
ing torque evenly between left and right
wheels. With a traction difference between
left and right wheels, the coupling will sense
a speed difference. As one wheel begins to
spin faster than the other, torque will auto-
matically transfer from the wheel that has
less traction, to the wheel that has traction.
While the transfer case and axle coupling
NEUTRAL (N) Switch
153