air suspension JEEP GRAND CHEROKEE 2018 Owner handbook (in English)

Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate when
the system is not operating properly. The
TPMS malfunction indicator is combined
with the low tire pressure telltale. When the
system detects a malfunction, the telltale will
flash for approximately one minute and then
remain continuously illuminated. This se-
quence will continue upon subsequent ve-
hicle start-ups as long as the malfunction
exists. When the malfunction indicator is
illuminated, the system may not be able to
detect or signal low tire pressure as intended.
TPMS malfunctions may occur for a variety of
reasons, including the installation of replace-
ment or alternate tires or wheels on the ve-
hicle that prevent the TPMS from functioning
properly. Always check the TPMS malfunc-
tion telltale after replacing one or more tires
or wheels on your vehicle to ensure that the
replacement or alternate tires and wheels
allow the TPMS to continue to function
properly.CAUTION!
The TPMS has been optimized for the
original equipment tires and wheels.
TPMS pressures and warning have been
established for the tire size equipped on
your vehicle. Undesirable system opera-
tion or sensor damage may result when
using replacement equipment that is not
of the same size, type, and/or style. After-
market wheels can cause sensor damage.
Using aftermarket tire sealants may cause
the Tire Pressure Monitoring System
(TPMS) sensor to become inoperable. Af-
ter using an aftermarket tire sealant it is
recommended that you take your vehicle to
your authorized dealer to have your sensor
function checked.
Yellow Indicator Lights
— Air Suspension Light — If
Equipped
This light will illuminate when the air suspen-
sion system is actively adjusting the ride
height.
— Forward Collision Warning Off Indi-
cator Light — If Equipped
This light indicates that Forward Collision
Warning is off.
— 4WD Low Indicator Light — If
Equipped
This light alerts the driver that the vehicle is
in the four-wheel drive LOW mode. The front
and rear driveshafts are mechanically locked
together forcing the front and rear wheels to
rotate at the same speed. Low range provides
a greater gear reduction ratio to provide in-
creased torque at the wheels.
Refer to “Four-Wheel Drive Operation — If
Equipped” in “Starting And Operating” for
further information on four-wheel drive op-
eration and proper use.
— Rear Fog Indicator — If Equipped
This indicator light will illuminate when the
rear fog lights are on.
73

STARTING AND OPERATING
STARTING THE ENGINE — GAS . .137
Automatic Transmission..........137
Normal Starting...............137
STARTING THE ENGINE — 3.0L DIE-
SEL ENGINE................139
Automatic Transmission..........140
Normal Starting...............140
STOP/START SYSTEM — IF
EQUIPPED.................140
Automatic Mode...............140
Possible Reasons The Engine Does Not
Autostop...................141
To Start The Engine While In Autostop
Mode.....................142
To Manually Turn Off The Stop/Start
System....................142
To Manually Turn On The Stop/Start
System....................142
System Malfunction............142
ENGINE BREAK-IN RECOMMENDA-
TIONS....................143
3.6L & 5.7L Engines............143Diesel Engine................143
SRT Engines.................144
AUTOMATIC TRANSMISSION . . .145
Ignition Park Interlock...........146
Brake/Transmission Shift Interlock
System....................146
Fuel Economy (ECO) Mode........146
Eight–Speed Automatic Transmission . .147
SPORT MODE — IF EQUIPPED . .149
FOUR WHEEL DRIVE OPERATION.149
Quadra-Trac I Operating Instructions/
Precautions — If Equipped........149
Quadra-Trac II Operating Instructions/
Precautions — If Equipped........150
Shift Positions................150
Shifting Procedures.............151
Quadra-Drive II System — If Equipped .153
QUADRA-LIFT — IF EQUIPPED . .154
Description.................154
Air Suspension Modes...........156
Instrument Cluster Display Messages . .157Operation..................157
SELEC-TERRAIN — IF
EQUIPPED.................158
Selec-Terrain Mode Selection.......158
Instrument Cluster Display Messages . .159
SELEC-TRACK — IF EQUIPPED
(SRT).....................159
Custom....................160
Active Damping System..........160
Launch Control— If Equipped......160
Guidelines For Track Use.........162
SPEED CONTROL............163
Activation...................164
Setting A Desired Speed.........164
Varying The Speed.............164
Resume Speed...............165
Accelerating For Passing.........165
Deactivation.................165
ADAPTIVE CRUISE CONTROL
(ACC) ....................165
Activation..................166
STARTING AND OPERATING
135

When the Fuel Economy (ECO) Mode is en-
gaged, the vehicle control systems will
change the following:
• The transmission will upshift sooner and
downshift later.
• The overall driving performance will be
more conservative.
• Vehicles with Quadra-Lift air suspension
will operate in "Aero" mode over a broader
speed range. Refer to the section on
Quadra-Lift for further information.
• In SRT models, the transmission will
launch (from a stop) in second gear, and the
torque converter clutch may engage at
lower engine speeds and remain on longer.
• Some ECO mode functions may be tempo-
rarily inhibited based on temperature and
other factors.
Active Noise Cancellation — If Equipped
Your vehicle is equipped with an Active Noise
Cancellation System. This system uses four
microphones embedded in the headliner to
detect undesirable exhaust noise, which
sometimes occurs when operating in ECOmode. An onboard frequency generator cre-
ates counteracting sound waves through the
audio system to help keep the vehicle quiet.
Eight–Speed Automatic Transmission
Your vehicle is equipped with a fuel efficient
8 speed transmission. The gear selector is
located in the center console.
The transmission gear selector provides
PARK, REVERSE, NEUTRAL, DRIVE and
MANUAL (AutoStick) shift positions. Manualshifts can be made using the AutoStick shift
control. Toggling the gear selector forward (-)
or rearward (+) while in the MANUAL
(AutoStick) position (beside the DRIVE posi-
tion), or tapping the shift paddles (+/-), will
manually select the transmission gear, and
will display the current gear in the instrument
cluster. Refer to "AutoStick" in this section
for further information.
NOTE:
If the gear selector cannot be moved to the
PARK, REVERSE, or NEUTRAL position
(when pushed forward), it is probably in the
AutoStick (+/-) position (beside the DRIVE
position). In AutoStick mode, the transmis-
sion gear (1, 2, 3, etc.) is displayed in the
instrument cluster. Move the gear selector to
the right (into the DRIVE [D] position) for
access to PARK, REVERSE, and NEUTRAL.
AutoStick
AutoStick is a driver-interactive transmission
feature providing manual shift control, giving
you more control of the vehicle. AutoStick
allows you to maximize engine braking, elimi-
nate undesirable upshifts and downshifts,
and improve overall vehicle performance.Transmission Gear Selector
147

NOTE:
• If shift conditions/interlocks are not met, or
a transfer case motor temperature protec-
tion condition exists, a “For 4x4 High Slow
Below 3 mph (5 km/h) Put Trans in N push
4 Low” message will flash from the instru-
ment cluster display. Refer to “Instrument
Cluster Display” in “Getting To Know Your
Instrument Panel” for further information.
• Shifting into or out of 4WD LOW is possible
with the vehicle completely stopped; how-
ever, difficulty may occur due to the mating
clutch teeth not being properly aligned.
Several attempts may be required for
clutch teeth alignment and shift comple-
tion to occur. The preferred method is with
the vehicle rolling 0 to 3 mph (0 to 5 km/h).
If the vehicle is moving faster than 3 mph
(5 km/h), the transfer case will not allow
the shift.
Shifting Into NEUTRAL (N)
WARNING!
You or others could be injured or killed if
you leave the vehicle unattended with the
WARNING!
transfer case in the NEUTRAL (N) position
without first fully engaging the parking
brake. The NEUTRAL (N) position disen-
gages both the front and rear drive shafts
from the powertrain and will allow the
vehicle to roll, even if the transmission is
in PARK. The parking brake should always
be applied when the driver is not in the
vehicle.
1. Bring the vehicle to a complete stop, with
the engine running.
2. Press and hold the brake pedal.
3. Shift the transmission into NEUTRAL.
4. If vehicle is equipped with Quadra-Lift air
suspension, ensure the vehicle is set to
Normal Ride Height.
5. Using a ballpoint pen or similar object,
push and hold the recessed transfer case
NEUTRAL (N) button (located by the se-
lector switch) for four seconds. The light
behind the NEUTRAL (N) symbol will
blink, indicating shift in progress. The
light will stop blinking (stay on solid)
when the shift to NEUTRAL (N) is com-plete. A “NEUTRAL” message will appear
in the instrument cluster display. Refer to
“Instrument Cluster Display” in “Getting
To Know Your Instrument Panel” for fur-
ther information.
6. After the shift is completed and the NEU-
TRAL (N) light stays on, release the NEU-
TRAL (N) button.
7. Shift the transmission into REVERSE.
8. Release the brake pedal for five seconds
and ensure that there is no vehicle
movement.
NEUTRAL (N) Switch
STARTING AND OPERATING
152

differ in design, their operation is similar.
Follow the Quadra-Trac II transfer case shift-
ing information, preceding this section, for
shifting this system.
QUADRA-LIFT — IF
EQUIPPED
Description
The Quadra-Lift air suspension system pro-
vides full time load leveling capability along
with the benefit of vehicle height adjustment
by the push of a button. The vehicle will
automatically raise and lower the ride height
to adapt to the appropriate driving condi-
tions. At higher speeds, the vehicle will lower
to an aerodynamic ride height and when
operating in off-road modes, the vehicle will
raise the ride height accordingly. The buttons
near the terrain switch in the center console
area can be used to set preferred ride height
to match the appropriate conditions.
•Normal Ride Height (NRH)– This is the stan-
dard position of the suspension and is
meant for normal driving.•Off-Road 1 (OR1) (Raises the vehicle approxi-
mately 1.1 inches (28 mm))– This is the
primary position for all off-road driving until
OR2 is needed. A smoother and more com-
fortable ride will result. Push the “UP”
button once from the NRH position while
the vehicle speed is below 38 mph
(61 km/h). When in the OR1 position, if the
vehicle speed remains between 40 mph
(64 km/h) and 50 mph (80 km/h) for
greater than 20 seconds or if the vehicle
speed exceeds 50 mph (80 km/h), the
vehicle will be automatically lowered to
NRH.
•Off-Road 2 (OR2) (Raises the vehicle approxi-
mately 2.2 inches (55 mm))– This position is
intended for off-roading use only where
maximum ground clearance is required. To
enter OR2, push the “UP” button twice
from the NRH position or once from the
OR1 position while vehicle speed is below
20 mph (32 km/h). While in OR2, if the
vehicle speed exceeds 25 mph (40 km/h)
the vehicle height will be automatically
lowered to OR1.
Selec-Terrain Switch
1 — UP Button
2 — DOWN Button
3 — Entry/Exit Mode Indicator Lamp
(Customer Selectable)
4 — Normal Ride Height Indicator
Lamp (Customer Selectable)
5 — Off-Road 1 Indicator Lamp (Cus-
tomer Selectable)
6 — Off-Road 2 Indicator Lamp (Cus-
tomer Selectable)
STARTING AND OPERATING
154

•Aero Mode (Lowers the vehicle approximately
0.6 inches (15 mm))– This position provides
improved aerodynamics by lowering the ve-
hicle. The vehicle will automatically enter
Aero Mode when the vehicle speed remains
between 52 mph (83 km/h) and 56 mph
(90 km/h) for greater than 20 seconds or if
the vehicle speed exceeds 56 mph
(90 km/h). The vehicle will return to NRH
from Aero Mode if the vehicle speed re-
mains between 20 mph (32 km/h) and
25 mph (40 km/h) for greater than 20 sec-
onds or if the vehicle speed falls below
20 mph (32 km/h). The vehicle will enter
Aero Mode, regardless of vehicle speed if
the vehicle is in “SPORT” mode.
•Entry/Exit Mode (Lowers the vehicle approxi-
mately 1.6 inches (40 mm)– This position
lowers the vehicle for easier passenger en-
try and exit as well as lowering the rear of
the vehicle for easier loading and unloading
of cargo. To enter Entry/Exit Mode, push the
“DOWN” button once from (NRH) while the
vehicle speed is below 25 mph (40 km/h).
Once the vehicle speed goes below 15 mph
(24 km/h) the vehicle height will begin to
lower. If the vehicle speed remains between15 mph (24 km/h) and 25 mph (40 km/h)
for greater than 60 seconds, or the vehicle
speed exceeds 25 mph (40 km/h) the
Entry/Exit Mode change will be cancelled.
To exit Entry/Exit Mode, press the “Up”
button once while in Entry/Exit Mode or
drive the vehicle over 15 mph (24 km/h).
NOTE:
Automatic lowering of the vehicle into Entry/
Exit Mode can be enabled through the
Uconnect Touch-Screen Radio. If this feature
is enabled, the vehicle will only lower if the
gear selector is in "PARK", the terrain switch
is in "AUTO", the transfer-case is in "AUTO”
and the vehicle level should be either in
Normal or Aero Mode. The Vehicle will not
automatically lower if the air suspension level
is in Off Rd 2 or Off Rd 1. If the vehicle is
equipped with Intrusion Theft Module (ITM),
the lowering will be suppressed when the
ignition is switched OFF and the door is open
to prevent setting the alarm off.
The Selec-Terrain switch will automatically
change the vehicle to the proper height based
on the position of the Selec-Terrain switch.
The height can be changed from the defaultSelec-Terrain setting by normal use of the air
suspension buttons. Refer to “Selec-Terrain”
in “Starting And Operating” for further infor-
mation.
The system requires that the engine be run-
ning for all changes. When lowering the ve-
hicle all of the doors, including the liftgate,
must be closed. If a door is opened at any
time while the vehicle is lowering the change
will not be completed until the open door(s)
is/are closed.
The Quadra-Lift air suspension system uses a
lifting and lowering pattern which keeps the
headlights from incorrectly shining into on-
coming traffic. When raising the vehicle, the
rear of the vehicle will move up first and then
the front. When lowering the vehicle, the
front will move down first and then the rear.
After the engine is turned off, it may be
noticed that the air suspension system oper-
ates briefly, this is normal. The system is
correcting the position of the vehicle to en-
sure a proper appearance.
155

To assist with changing a spare tire, the
Quadra-Lift air suspension system has a fea-
ture which allows the automatic leveling to
be disabled. Refer to “Uconnect Settings” in
“Multimedia” for further information.
For further information refer to “Driving Tips”
in “Starting And Operating” in the Owner’s
Manual.
NOTE:
If equipped with a touch screen radio all
enabling/disabling of air suspension features
must be done through the radio. Refer to
“Uconnect Settings” in “Multimedia” for fur-
ther information.
WARNING!
The air suspension system uses a high
pressure volume of air to operate the sys-
tem. To avoid personal injury or damage to
the system, see your authorized dealer for
service.
Air Suspension Modes
The Air Suspension system has multiple
modes to protect the system in unique situa-
tions:
Tire/Jack Mode
To assist with changing a spare tire, the air
suspension system has a feature which al-
lows the automatic leveling to be disabled.
Refer to “Uconnect Settings” in “Multime-
dia” for further information.
NOTE:
This mode is intended to be enabled with
engine running.
Auto Entry/Exit Mode
To assist in entering and exiting the vehicle,
the air suspension system has a feature
which automatically lowers the vehicle to
entry/exit ride height. Refer to “Uconnect
Settings” in “Multimedia” for further infor-
mation.
NOTE:
This mode is intended to be enabled with
engine running.Transport Mode
To assist with flat bed towing, the air suspen-
sion system has a feature which will put the
vehicle into Entry/Exit height and disable the
automatic load leveling system. Refer to
“Uconnect Settings” in “Multimedia” for fur-
ther information.
NOTE:
This mode is intended to be enabled with
engine running.
Suspension Display Messages Mode
The “Suspension Display Messages” setting
allows you to only display suspension warn-
ings. Refer to “Uconnect Settings” in “Mul-
timedia” for further information.
NOTE:
This mode is intended to be enabled with
engine running.
Wheel Alignment Mode
Before performing a wheel alignment this
mode must be enabled. Refer to “Uconnect
Settings” in “Multimedia” for further infor-
mation.
STARTING AND OPERATING
156

NOTE:
This mode is intended to be enabled with
engine running.
If equipped with a touch screen radio all
enabling/disabling of air suspension features
must be done through the radio. Refer to
“Uconnect Settings” in “Multimedia” for fur-
ther information.
Instrument Cluster Display Messages
When the appropriate conditions exist, a
message will appear in the instrument clus-
ter. Refer to “Instrument Cluster Display” in
“Getting To Know Your Instrument Panel” for
further information.
Operation
The indicator lamps 3 through 6 will illumi-
nate to show the current position of the ve-
hicle. Flashing indicator lamps will show a
position which the system is working to
achieve. When raising, if multiple indicator
lamps are flashing on the “UP” button, the
highest flashing indicator lamp is the posi-
tion the system is working to achieve. Whenlowering, if multiple indicators are flashing
on the "DOWN" button the lowest solid indi-
cator lamp is the position the system is work-
ing to achieve.
Pushing the “UP” button once will move the
suspension one position higher from the cur-
rent position, assuming all conditions are
met (i.e. engine running, speed below thresh-
old, etc). The “UP” button can be pushed
multiple times, each push will raise the re-
quested level by one position up to a maxi-
mum position of OR2 or the highest position
allowed based on current conditions (i.e. ve-
hicle speed, etc).
Pushing the “DOWN” button once will move
the suspension one position lower from the
current level, assuming all conditions are met
(i.e. engine running, doors closed, speed be-
low threshold, etc). The “DOWN” button can
be pressed multiple times. Each push will
lower the requested level by one position
down to a minimum of Park Mode or the
lowest position allowed based on current con-
ditions (i.e. vehicle speed, etc.)Automatic height changes will occur based
on vehicle speed and the current vehicle
height. The indicator lamps and instrument
cluster display messages will operate the
same for automatic changes and user re-
quested changes.
• Off-Road 2 (OR2) – Indicator lamps 4, 5,
and 6 will be illuminated when the vehicle
is in OR2.
• Off-Road 1 (OR1) – Indicator lamps 4 and
5 will be illuminated when the vehicle is in
OR1.
• Normal Ride Height (NRH) – Indicator
lamp 4 will be illuminated when the vehicle
is in this position.
• Entry/Exit Mode – Indicator lamp 3 will be
illuminated when the vehicle is in Entry/
Exit Mode. If Entry/Exit Mode is requested
while vehicle speed is between 15 mph
(24 km/h) and 25 mph (40 km/h), indicator
lamp 4 will remain on solid and indicator
lamp 3 will flash as the system waits for the
vehicle to reduce speed. If vehicle speed is
reduced to, and kept below, 15 mph
(24 km/h) indicator lamp 4 will turn off and
indicator lamp 3 will flash until Entry/Exit
157

Mode is achieved at which point indicator
lamp 3 will go solid. If during the height
change to Entry/Exit Mode, the vehicle
speed exceeds 15 mph (24 km/h), the
height change will be paused until the
vehicle speed either goes below 15 mph
(24 km/h) and the height change continues
to Entry/Exit Mode, or exceeds 25 mph
(40 km/h) and the vehicle height will return
to NRH. Entry/Exit Mode may be selected
while the vehicle is not moving provided
that the engine is still running and all doors
remain closed.
• Transport Mode - No indicator lamps will be
illuminated. Customer driving will disable
Transport Mode.
• Tire/Jack Mode - Indicator lamps 3 and
6 will be illuminated. Customer driving will
disable Tire/Jack Mode.
• Wheel Alignment Mode - Indicator lamps
3 and 4 will be illuminated. Customer driv-
ing will disable Wheel Alignment Mode.SELEC-TERRAIN — IF
EQUIPPED
Selec-Terrain Mode Selection
Selec-Terrain combines the capabilities of
the vehicle control systems, along with driver
input, to provide the best performance for all
terrains.
Selec-Terrain consists of the following positions:
•Snow–Tuning set for additional stability in
inclement weather. Use on and off road on
loose traction surfaces such as snow. When in
Snow mode (depending on certain operating
conditions), the transmission may use second
gear (rather than first gear) during launches, to
minimize wheel slippage. If equipped with air
suspension, the default ride height for Snow is
Normal Ride Height (NRH).
•Auto– Fully automatic full time four-wheel
drive operation can be used on and off road.
Balances traction with seamless steering
feel to provide improved handling and ac-
celeration over two-wheel drive vehicles. If
equipped with air suspension, the level will
change to Normal Ride Height (NRH).
•Sand– Off road calibration for use on low
traction surfaces such as sand or wet grass.
Driveline is maximized for traction. Some
binding may be felt on less forgiving sur-
faces. The electronic brake controls are set
to limit traction control management of
throttle and wheel spin. If equipped with
air suspension, the default ride height for
Sand is Normal Ride Height (NRH).
Selec-Terrain Switch
STARTING AND OPERATING
158

•Mud– Off road calibration for use on low
traction surfaces such as mud. Driveline is
maximized for traction. Some binding may
be felt on less forgiving surfaces. The elec-
tronic brake controls are set to limit traction
control management of throttle and wheel
spin. If equipped with air suspension, the
level will change to Off Road 1.
•Rock– Off road calibration only available in
4WD Low range. The vehicle is raised (if
equipped with Air Suspension) for im-
proved ground clearance. Traction based
tuning with improved steer-ability for use
on high traction off-road surfaces. Use for
low speed obstacles such as large rocks,
deep ruts, etc. If equipped with air suspen-
sion, the vehicle level will change to Off-
Road 2. If the Selec-Terrain switch is in
ROCK mode, and the transfer case is
switched from 4WD Low to 4WD High, the
Selec-Terrain system will return to AUTO.
NOTE:
Activate the Hill Descent Control or Selec
Speed Control for steep downhill control. See
“Electronic Brake Control System” in this
section for further information.Instrument Cluster Display Messages
When the appropriate conditions exist, a
message will appear in the instrument clus-
ter. Refer to “Instrument Cluster Display” in
“Getting To Know Your Instrument Panel” for
further information.
SELEC-TRACK — IF
EQUIPPED (SRT)
Description
Selec-Track combines the capabilities of the
vehicle control systems, along with driver
input, to provide the best performance for all
terrains.
Rotate the Selec-Track knob to select the
desired mode.Refer to “SRT Drive Modes” in the “Multime-
dia” section in your Owner’s Manual for fur-
ther information.
Selec-Track consists of the following posi-
tions:
•Sport– Dry weather, on-road calibration.
Performance based tuning that provides a
rear wheel drive feel but with improved
handling and acceleration over a two-wheel
drive vehicle. This feature will reset to
AUTO on an ignition cycle.
•Snow– Tuning set for additional stability in
inclement weather. Use on and off road on
loose traction surfaces such as snow. This
feature will reset to AUTO upon an ignition
cycle.
•Auto– Fully automatic full time four-wheel
drive operation can be used on and off road.
Balances traction with seamless steering
feel to provide improved handling and ac-
celeration over two-wheel drive vehicles.
Selec-Track Switch
159