2020 JEEP GRAND CHEROKEE service

Selec-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.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 situations:
Tire/Jack Mode
To assist with changing a spare tire, the air
suspension system has a feature which allows
the automatic leveling to be disabled. Refer
to “Uconnect Settings” in “Multimedia” 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.
165

Refer to “Instrument Cluster Display” in
“Getting To Know Your Instrument Panel” in
your Owner’s Manual for further information.
Enabling And Disabling ParkSense
ParkSense can be enabled and disabled with
the ParkSense switch.
When the ParkSense switch is
pushed to disable the system, the
instrument cluster will display the
“PARKSENSE OFF” message for
approximately five seconds. When the gear
selector is moved to REVERSE and the sys-
tem is disabled, the instrument cluster dis-
play will display the “PARKSENSE OFF”
message for as long as the vehicle is in
REVERSE.
Refer to “Instrument Cluster Display” in
“Getting To Know Your Instrument Panel” in
your Owner’s Manual for further information.
The ParkSense switch LED will be on when
ParkSense is disabled or requires service.
The ParkSense switch LED will be off when
the system is enabled. If the ParkSenseswitch is pushed, and the system requires
service, the ParkSense switch LED will blink
momentarily, and then the LED will be on.
ParkSense System Usage Precautions
NOTE:
• Ensure that the rear bumper is free of snow,
ice, mud, dirt and debris to keep the
ParkSense system operating properly.
• Jackhammers, large trucks, and other vi-
brations could affect the performance of
ParkSense.
• When you turn ParkSense off, the instru-
ment cluster will display “PARKSENSE
OFF.” Furthermore, once you turn
ParkSense off, it remains off until you turn
it on again, even if you cycle the ignition.
• When you move the gear selector to the
REVERSE position and ParkSense is
turned off, the instrument cluster display
will display “PARKSENSE OFF” message
for as long as the vehicle is in REVERSE.
• ParkSense, when on, will reduce the vol-
ume of the radio when it is sounding a tone.• Clean the ParkSense sensors regularly, tak-
ing care not to scratch or damage them.
The sensors must not be covered with ice,
snow, slush, mud, dirt or debris. Failure to
do so can result in the system not working
properly. The ParkSense system might not
detect an obstacle behind the fascia/
bumper, or it could provide a false indica-
tion that an obstacle is behind the fascia/
bumper.
• Use the ParkSense switch to turn the
ParkSense system off if objects such as
bicycle carriers, trailer hitches, etc. are
placed within 12 inches (30 cm) from the
rear fascia/bumper. Failure to do so can
result in the system misinterpreting a close
object as a sensor problem, causing the
“PARKSENSE UNAVAILABLE SERVICE
REQUIRED” message to be displayed in
the instrument cluster display.
• ParkSense should be disabled when the
liftgate is in the open position and the
vehicle is in REVERSE. An open liftgate
could provide a false indication that an
obstacle is behind the vehicle.
STARTING AND OPERATING
178

The six ParkSense sensors, located in the
front fascia/bumper, monitor the area in front
of the vehicle that is within the sensors’ field
of view. The sensors can detect obstacles
from approximately 12 inches (30 cm) up to
47 inches (120 cm) from the front fascia/
bumper in the horizontal direction, depend-
ing on the location, type and orientation of
the obstacle.
When an object is detected within 79 inches
(200 cm) behind the rear bumper while the
vehicle is in REVERSE, a warning will appear
in the instrument cluster display. In addition
a chime will sound (when Sound and Display
is selected from the Customer Programmable
Features section of the Uconnect System
screen). As the vehicle moves closer to the
object, the chime rate will change from single
1/2 second tone (for rear only), to slow (for
rear only), to fast, to continuous.Enabling And Disabling ParkSense
ParkSense can be enabled and disabled with
the ParkSense switch.
When the ParkSense switch is
pushed to disable the system, the
instrument cluster will display the
“PARKSENSE OFF” message for
approximately five seconds. When the gear
selector is moved to REVERSE and the sys-
tem is disabled, the instrument cluster dis-
play will display the “PARKSENSE OFF”
message for as long as the vehicle is in
REVERSE.
Refer to “Instrument Cluster Display” in
“Getting To Know Your Instrument Panel” in
your Owner’s Manual for further information.
NOTE:
When ParkSense is disabled and the gear
selector is moved to the DRIVE position, no
warning message will be displayed.
The ParkSense switch LED will be on when
ParkSense is disabled or requires service.
The ParkSense switch LED will be off when
the system is enabled. If the ParkSenseswitch is pushed, and the system requires
service, the ParkSense switch LED will blink
momentarily, and then the LED will be on.
PARKSENSE ACTIVE PARK
ASSIST SYSTEM — IF
EQUIPPED
The ParkSense Active Park Assist system is
intended to assist the driver during parallel
and perpendicular parking maneuvers by
identifying a proper parking space, providing
audible/visual instructions, and controlling
the steering wheel. The ParkSense Active
Park Assist system is defined as “semi-
automatic” since the driver maintains control
of the accelerator, gear selector and brakes.
Depending on the driver's parking maneuver
selection, the ParkSense Active Park Assist
system is capable of maneuvering a vehicle
into a parallel or a perpendicular parking
space on either side (i.e., driver side or pas-
senger side).
STARTING AND OPERATING
180

CAUTION!
For diesel engines, only use diesel fuel for
motor vehicles in accordance with EN 590
European specifications. The use of other
products or mixtures may damage the en-
gine beyond repair and consequently void
the warranty, due to the damage caused. If
you accidentally introduce other types of
fuel into the tank, do not start the engine.
Empty the tank. If the engine has been run
for even an extremely limited amount of
time, you must not only drain the fuel
tank, but the rest of the supply circuit as
well.
Avoid Using Contaminated Fuel
Fuel that is contaminated by water or dirt can
cause severe damage to the engine fuel sys-
tem. Proper maintenance of the engine fuel
filter and fuel tank is essential. Refer to
“Dealer Service” in “Servicing And Mainte-
nance” in your Owner’s Manual for further
information.
AdBlue® (UREA) — If Equipped
The vehicle is equipped with an UREA injec-
tion system and Selective Catalytic Reduc-
tion to meet emission standards. These two
systems ensure compliance with the diesel
emissions requirements; at the same, they
ensure fuel-efficiency, handling, torque and
power. For messages and system warnings,
refer to the "Warning Lights And Messages" in
the "Getting To Know Your Instrument Panel"
section. AdBlue
®is a very stable product
with a long shelf life. Stored at temperatures
LOWER than 90 °F (32 °C), it has a shelf life
of at least one year. For more information on
the AdBlue
®liquid type, see the “Fluids and
lubricants” in the “Technical specifications”
section. The vehicle is equipped with an
automatic AdBlue
®heating system when the
engine starts allowing the system to work
correctly at temperatures lower than 12 °F
(-11 °C).
NOTE:
• AdBlue
®freezes at temperatures lower
than 12 °F (-11 °C).• Your vehicle is equipped with a AdBlue
®
injection system. You may occasionally
hear an audible clicking noise from under
the vehicle at a stop. This is normal opera-
tion.
• The AdBlue
®pump will run for a period of
time after engine shutdown to purge the
AdBlue
®system. This is normal operation
and may be audible from the rear of the
vehicle.
AdBlue® Storage
AdBlue®is considered a very stable product
with a long shelf life. If AdBlue®is kept in
temperatures between 10° and 90°F
(-12° and 32°C), it will last a minimum of
one year.
AdBlue
®is subject to freezing at the lowest
temperatures. For example, AdBlue®may
freeze at temperatures at or below 12° F
(-11° C). The system has been designed to
operate in this environment.
STARTING AND OPERATING
190

Exterior Bulbs
Bulb Number
Headlamps (Low Beam) — If Equipped H11
Premium Headlamps (Low/High Beam) D3S (Service at Authorized Dealer)
Headlamps (High Beam) — If Equipped H9
Premium Park/Turn Signal Lamp LED - (Service at Authorized Dealer)
Premium Daytime Running Lamp (DRL) LED - (Service at Authorized Dealer)
Front Fog LampsH11
LED - (Service at Authorized Dealer)
Front Side Marker — If EquippedW5W
Premium Front Side Marker — If Equipped LED - (Service at Authorized Dealer)
Front Park/Turn Lamp — If Equipped 7444NA (WY28/8W)
Rear Body Side Turn Signal Lamps 7440NA (WY21W)
Auxiliary Liftgate Tail Lamps LED - (Service at Authorized Dealer)
Liftgate Backup Lamps921 (W16W)
Rear License Lamps LED - (Service at Authorized Dealer)
Rear Body Side Stop Lamps 3157KRD LCP (P27/7W)
Rear Body Side Tail Lamps LED - (Service at Authorized Dealer)
Rear Fog Lamps7440 (W21W)
CHMSL - Center High Mounted Stop Lamp LED - (Service at Authorized Dealer)
NOTE:
Numbers refer to commercial bulb types that can be purchased from your authorized dealer.
If a bulb needs to be replaced, visit your authorized dealer or refer to the applicable Service Manual.
205

Bulb Replacement
High Intensity Discharge Headlamps (HID)
—
If Equipped
The headlamps are a type of high voltage
discharge tube. High voltage can remain in
the circuit even with the headlamp switch off
and the key removed.Because of this, you
should not attempt to service a headlamp bulb
yourself. If a headlamp bulb fails, take your
vehicle to an authorized dealer for service.
WARNING!
A transient high voltage occurs at the bulb
sockets of High Intensity Discharge (HID)
headlamps when the headlamp switch is
turned ON. It may cause serious electrical
shock or electrocution if not serviced prop-
erly. See your authorized dealer for
service.NOTE:
On vehicles equipped with High Intensity
Discharge (HID) headlamps, when the head-
lamps are turned on, there is a blue hue to
the lamps. This diminishes and becomes
more white after approximately 10 seconds,
as the system charges.
Halogen Headlamps — If Equipped
NOTE:
We advise referring to an authorized dealer.
NOTE:
Lens fogging can occur under certain atmo-
spheric conditions. This will usually clear as
atmospheric conditions change to allow the
condensation to change back to vapor. Turn-
ing the lamps on will usually accelerate the
clearing process.
1. Open the hood.
2. Access the back of the headlamp.NOTE:
• The air filter housing must be removed.
• The windshield washer reservoir may
need to be rotated out of the way by
removing the fastener.
• Coolant reservoir (if equipped) will
need to be repositioned by removing
the fasteners, and moving the unit out
of the way.
3. To access the low beam bulb you must
remove the rubber boot seal from back-
side of the lamp housing.
NOTE:
Ensure the rubber boot is properly rein-
stalled to prevent water and moisture from
entering the lamp.
CAUTION!
•Do not contaminate the bulb glass by
touching it with your fingers or by allow-
ing it to contact other oily surfaces.
Shortened bulb life will result.
IN CASE OF EMERGENCY
206

CAUTION!
• Always use the correct bulb size and type
for replacement. An incorrect bulb size
or type may overheat and cause damage
to the lamp, the bulb socket, or the lamp
wiring.
4. Turn the low or high beam bulb one–
quarter turn counterclockwise to remove
from housing.
5. Disconnect the electrical connector and
replace the bulb.
Front Turn Signal Lamp
SRT vehicles are equipped with front turn
signal lamps are LEDs. See your authorized
dealer for service.
NOTE:
We advise referring to an authorized dealer.
1. Open the hood.
2. Access the back of the headlamp.NOTE:
• The air filter housing must be removed.
• The windshield washer reservoir may
need to be rotated out of the way by
removing the fastener.
• Coolant reservoir (if equipped) will
need to be repositioned by removing the
fasteners, and moving the unit out of
the way.
3. Turn the turn signal bulb one–quarter turn
counterclockwise to remove from housing.
4. Disconnect the electrical connector and
replace the bulb.
CAUTION!
Do not touch the new bulb with your fin-
gers. Oil contamination will severely
shorten bulb life. If the bulb comes in
contact with any oily surface, clean the
bulb with rubbing alcohol.
Front Fog Lamps
Please see your authorized dealer for service.
Rear Tail, Stop, and Turn Signal Lamps
1. Raise the liftgate.
2. Remove the two push-pins from the tail
lamp housing.
3. Grasp the tail lamp and pull firmly rear-
ward to disengage the lamp from the ap-
erture panel.
4. Twist socket counter clockwise and re-
move from lamp.
Tail Lamp Push Pins
207

6. Remove/replace bulb(s).
7. Reinstall the socket(s).
8. Reverse process to reinstall the liftgate
trim.
Rear Fascia Mounted Fog Lamp
NOTE:
We advise referring to an authorized dealer.
1. Using a fiber stick or flat blade screw
driver, gently pry between the inboard
edge of the lamp and the fascia.
2. Remove lamp from fascia opening.
3. Twist socket counter clockwise.
4. Replace bulb.
5. Reinstall the socket.
6. Hook inboard side of the lamp into the
fascia pocket.7. Rotate lamp forward in car until lamp
snaps back into the opening.Center High-Mounted Stop Lamp (CHMSL)
The center high mounted stop lamp is an
LED. Service at an authorized dealer.
Rear License Lamp
The rear license lamps are LEDs. See your
authorized dealer for service.
Rear Of Liftgate Tail Lamp
1 — Auxiliary LED Tail Connector – Do
Not Remove
2 — Backup Bulb Socket
Rear Fog Lamps
Center High-Mounted Stop Lamp
209