2018 JEEP GRAND CHEROKEE LIMITED ECU

If the vehicle security alarm is armed and the battery
becomes disconnected, the vehicle security alarm will
remain armed when the battery is reconnected; the exterior
lights will flash, and the horn will sound. If this occurs,
disarm the vehicle security alarm.
Rearming Of The System
If something triggers the alarm, and no action is taken to
disarm it, the vehicle security alarm will turn the horn off
after 29 seconds, five seconds between cycles, up to eight
cycles if the trigger remains active and the vehicle security
alarm will rearm itself.
Security System Manual Override
The vehicle security alarm will not arm if you lock the
doors using the manual door lock plunger.
Tamper Alert
If something has triggered the vehicle security alarm in
your absence, the horn will sound three times and the
exterior lights will blink three times when you disarm the
vehicle security alarm. Check the vehicle for tampering.
DOORS
Manual Door Locks
The power door locks can be manually locked from inside
the vehicle by using the door lock knob. To lock each door,
push the door lock knob on each door trim panel down-
ward. To unlock the front doors, pull the inside door
handle to the first detent. To unlock the rear doors, pull the
door lock knob on the door trim panel upward. If the lock
knob is down when the door is closed, the door will lock.
Therefore, make sure the key fob is not inside the vehicle
before closing the door.
NOTE:Manually locking the vehicle will not arm the
vehicle security alarm.

WARNING!
•ALL the head restraints MUST be reinstalled in the
vehicle to properly protect the occupants.
• All occupants, including the driver, should not oper-
ate a vehicle or sit in a vehicle’s seat until the head
restraints are placed in their proper positions in
order to minimize the risk of neck injury in the event
of a collision.
• Do not place items over the top of the Active Head
Restraint, such as coats, seat covers or portable DVD
players. These items may interfere with the opera-
tion of the Active Head Restraint in the event of a
collision and could result in serious injury or death.
• Active Head Restraints may be deployed if they are
struck by an object such as a hand, foot or loose
cargo. To avoid accidental deployment of the Active
Head Restraint ensure that all cargo is secured, as
loose cargo could contact the Active Head Restraint
during sudden stops. Failure to follow this warning
could cause personal injury if the Active Head Re-
straint is deployed.
Adjustment — Rear Seats
The head restraints on the outboard seats are not adjust-
able. They automatically fold forward when the rear seat is
folded to a load floor position, but do not return to their
normal position when the rear seat is raised. After return-
ing either seat to its upright position, raise the head
restraint until it locks in place. The outboard head re-
straints are not removable.
The center head restraint has limited adjustment. Lift
upward on the head restraint to raise it, or push downward
on the head restraint to lower it.

Retractable Cargo Area Cover — If Equipped
NOTE:The purpose of this cover is for privacy, not to
secure loads. It will not prevent cargo from shifting or
protect passengers from loose cargo.
To cover the cargo area:
1. Grasp the cover at the center handle. Pull it over the cargo area.
2. Insert the pins on the ends of the cover into the slots in the pillar trim cover.
3. The liftgate may be opened with the cargo cover in place.

Rear Cargo Tie-Downs
The rear cargo tie-downs, located on the cargo area floor,
should be used to safely secure loads when the vehicle is
moving.

WARNING!(Continued)
•Place as much cargo as possible in front of the rear
axle. Too much weight or improperly placed weight
over or behind the rear axle can cause the rear of the
vehicle to sway.
• Do not pile luggage or cargo higher than the top of
the seatback. This could impair visibility or become
a dangerous projectile in a sudden stop or accident.
GARAGE DOOR OPENER — IF EQUIPPED
HomeLink replaces up to three hand-held transmitters that
operate devices such as garage door openers, motorized
gates, lighting or home security systems. The HomeLink
unit is powered by your vehicle’s 12 Volt battery.
The HomeLink buttons, located on the overhead console,
designate the three different HomeLink channels. The
HomeLink indicator is located above the center button. NOTE:
HomeLink is disabled when the Vehicle Security
Alarm is active.
Before You Begin Programming HomeLink
Be sure that your vehicle is parked outside of the garage
before you begin programming.
For more efficient programming and accurate transmission
of the radio-frequency signal it is recommended that a new
battery be placed in the hand-held transmitter of the device
that is being programmed to the HomeLink system.

Using HomeLink
To operate, push and release the programmed HomeLink
button. Activation will now occur for the programmed
device (i.e. garage door opener, gate operator, security
system, entry door lock, home/office lighting, etc.). The
hand-held transmitter of the device may also be used at
any time.
Security
It is advised to erase all channels before you sell or turn in
your vehicle.
To do this, push and hold the two outside buttons for 20
seconds until the orange indicator flashes. Note that all
channels will be erased. Individual channels cannot be
erased.
The HomeLink Universal Transceiver is disabled when the
Vehicle Security Alarm is active.
Troubleshooting Tips
If you are having trouble programming HomeLink, here
are some of the most common solutions:
•Replace the battery in the Garage Door Opener hand-
held transmitter. •
Push the LEARN button on the Garage Door Opener to
complete the training for a Rolling Code.
• Did you unplug the device for programming and re-
member to plug it back in?
If you have any problems, or require assistance, please
call toll-free 1-800-355-3515 or, on the Internet at
HomeLink.com for information or assistance.

WARNING!
Cargo must be securely tied down before driving your
vehicle. Improperly secured loads can fly off the ve-
hicle, particularly at high speeds, resulting in personal
injury or property damage. Follow the roof rack cau-
tions when carrying cargo on your roof rack.

WARNING!(Continued)
vehicle control could occur that may result in an
accident involving serious injury or death.
• Access, or allow others to access, information
stored in your vehicle systems, including personal
information.
For further information, refer to “Cybersecurity” in “Mul-
timedia”.
EMISSIONS INSPECTION AND MAINTENANCE
PROGRAMS
In some localities, it may be a legal requirement to pass an
inspection of your vehicle’s emissions control system.
Failure to pass could prevent vehicle registration. For states that require an Inspection and Main-
tenance (I/M), this check verifies the “Malfunc-
tion Indicator Light (MIL)” is functioning and is
not on when the engine is running, and that the
OBD II system is ready for testing.
Normally, the OBD II system will be ready. The OBD II
system may notbe ready if your vehicle was recently
serviced, recently had a dead battery or a battery replace- ment. If the OBD II system should be determined not ready
for the I/M test, your vehicle may fail the test.
Your vehicle has a simple ignition actuated test, which you
can use prior to going to the test station. To check if your
vehicle’s OBD II system is ready, you must do the follow-
ing:
1. Cycle the ignition switch to the ON position, but do not
crank or start the engine.
NOTE: If you crank or start the engine, you will have to
start this test over.
2. As soon as you cycle the ignition switch to the ON position, you will see the “Malfunction Indicator Light
(MIL)” symbol come on as part of a normal bulb check.
3. Approximately 15 seconds later, one of two things will happen:
• The MIL will flash for about ten seconds and then return
to being fully illuminated until you turn OFF the igni-
tion or start the engine. This means that your vehicle’s
OBD II system is not readyand you should notproceed
to the I/M station.
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GETTING TO KNOW YOUR INSTRUMENT PANEL 161