engine JEEP GRAND CHEROKEE 2021 Owner handbook (in English)

CAUTION!
See an authorized dealer, as damage to the
exhaust system could occur soon with con-
tinued operation.
•Exhaust Filter Full — Power Reduced See
Dealer— This message indicates the PCM
has derated the engine to limit the likeli-
hood of permanent damage to the after-
treatment system. If this condition is not
corrected and a dealer service is not per-
formed, extensive exhaust after-treatment
damage can occur. To correct this condition
it will be necessary to have your vehicle
serviced by an authorized dealer.
NOTE:
Failing to follow the oil change indicator,
changing your oil and resetting the oil change
indicator by 0 miles remaining will prevent
the diesel exhaust filter from performing it's
cleaning routine. This will shortly result in a
Malfunction Indicator Light (MIL) and re-
duced engine power. Only an authorized
dealer will be able to correct this condition.
CAUTION!
See an authorized dealer, as damage to the
exhaust system could occur soon with con-
tinued operation.
Fuel System Messages — If Equipped
The following chart contains a list of different
messages that may appear in the instrument
cluster, depending on different system or fuel
conditions. Use the descriptions to interpret
what the message means and determine the
best action to take.
GETTING TO KNOW YOUR INSTRUMENT PANEL
70

MESSAGE DESCRIPTION
Diesel Emissions Additive AdBlue® Warning Messages:
Engine Will Not Restart In XXXX
mi (km) AdBlue® Low Refill SoonThis message will display when AdBlue
®driving range is less than 1500 miles (2414 km), AdBlue®fluid
top off is required within the displayed driving range. The message will be displayed during vehicle start up
with the current allowed driving range and accompanied by a single chime. The remaining driving range can
be pulled up anytime by way of the “Messages” list within the display.
Engine Will Not Restart In XXX mi
(km) Refill AdBlue®This message will display when AdBlue
®driving range is less than 311 miles (500 km). It is also displayed
at 249 miles (400 km), 186 miles (300 km), and 124 miles (200 km). Continuous Display starts at
124 miles (200 km). AdBlue
®fluid top off is required with in the displayed driving range. The message will
be displayed during vehicle start up with an updated driving range, and it will be accompanied by a single
chime. Starting at 100 miles (160 km), remaining range will be continuously displayed while operating the
vehicle. Chimes will also accompany the 75, 50 and 25 mile (120, 80, and 40 km) remaining distances.
The AdBlue
®Low telltale will be on continuously until AdBlue®fluid is topped off.
Engine Will Not Restart Refill
AdBlue®This message will display when the AdBlue®driving range is less than 1 mile (1.6 km), AdBlue®fluid top off
is required or the engine will not restart. The message will be displayed during vehicle start up, and it will be
accompanied by a single chime. The AdBlue
®Low telltale will be illuminated continuously until AdBlue®
fluid tank is filled with a minimum of 1.3 gallons (5 liters) of AdBlue®.
Diesel Emissions Additive AdBlue® Fault Warning Messages:
Service AdBlue® System See
DealerThis message will display when the fault is initially detected and each time the vehicle is started. The mes-
sage will be accompanied by a single chime and the Malfunction Indicator Light. See an authorized dealer to
have the vehicle serviced immediately. If not corrected in 31 miles (50 km), vehicle will enter the “Engine
Will Not Restart In XXX mi (km) Service AdBlue
®See Dealer” warning stage and message.
Incorrect AdBlue® Detected See
DealerThis message will display if the AdBlue®system has detected the incorrect fluid has been introduced to the
AdBlue®tank. The message will be accompanied by a single chime. See an authorized dealer to have the
vehicle serviced immediately. If not corrected in 31 miles (50 km), vehicle will enter the “Engine Will Not
Restart In XXX mi (km) Service AdBlue
®See Dealer” warning stage and message.
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MESSAGE DESCRIPTION
Engine Will Not Restart In XXX mi
(km) Service AdBlue® See DealerThis message is first displayed if the fault detected is not serviced after 31 miles (50 km) of operation. It is
also displayed at 249 miles (400 km), 186 miles (300 km), and 124 miles (200 km). System service is re-
quired within the displayed driving range. The message will appear in the display during vehicle start up with
an updated driving range, and it will be accompanied by a single chime. Starting at 124 miles (200 km),
remaining range will be continuously displayed while operating the vehicle. Chimes will also accompany the
75, 50 and 25 mile (120, 80, and 40 km) remaining distances. See an authorized dealer to have the ve-
hicle serviced immediately.
Engine Will Not Restart Service
AdBlue® System See DealerThis message will display if AdBlue
®system issue detected is not serviced during the allowed period. Your
engine will not restart unless your vehicle is serviced by an authorized dealer. This message will be displayed
when under 1 mile (1.6 km) until engine will not start and each time the vehicle is started, and will be con-
tinuously displayed. The message will be accompanied by a single chime. Your Malfunction Indicator Light
will be continuously illumined. See an authorized dealer if the message appears while engine is running.
Engine Will Not Start Service
AdBlue® System See DealerThis message will display when the fault detected is not serviced after the “Engine Will Not Restart Service
AdBlue
®System See Dealer” message is displayed on the next subsequent restart. Your engine will not start
unless your vehicle is serviced by an authorized dealer. The message will be accompanied by a single chime.
Your Malfunction Indicator Light will be continuously illuminated. If the message appears and you can not
start the engine, see an authorized dealer to have the vehicle serviced immediately.
NOTE:
• The gauge may take up to five seconds to update after adding a gallon or more of AdBlue
®to the AdBlue®
tank. If you have a fault related to the AdBlue®system, the gauge may not update to the new level. See
an authorized dealer for service.
• The AdBlue
®gauge may also not immediately update after a refill if the temperature of the AdBlue®fluid
is below 12°F (-11°C). The AdBlue®line heater will possibly warm up the AdBlue®fluid and allow the
gauge to update after a period of run time. Under very cold conditions, it is possible that the gauge may
not reflect the new fill level for several drives.
GETTING TO KNOW YOUR INSTRUMENT PANEL
72

If brake failure is indicated, immediate repair
is necessary.
WARNING!
Driving a vehicle with the red brake light
on is dangerous. Part of the brake system
may have failed. It will take longer to stop
the vehicle. You could have a collision.
Have the vehicle checked immediately.
Vehicles equipped with the Anti-Lock Brake
System (ABS) are also equipped with Elec-
tronic Brake Force Distribution (EBD). In the
event of an EBD failure, the Brake Warning
Light will turn on along with the ABS Light.
Immediate repair to the ABS system is re-
quired.
Operation of the Brake Warning Light can be
checked by turning the ignition switch from
the OFF position to the ON/RUN position.
The light should illuminate for approximately
four seconds. The light should then turn off
unless the parking brake is applied or a brake
fault is detected. If the light does not illumi-
nate, have the light inspected by an autho-
rized dealer.The light also will turn on when the parking
brake is applied with the ignition switch in
the ON/RUN position.
NOTE:
This light shows only that the parking brake is
applied. It does not show the degree of brake
application.
— Battery Charge Warning Light
This warning light will illuminate when the
battery is not charging properly. If it stays on
while the engine is running, there may be a
malfunction with the charging system. Con-
tact an authorized dealer as soon as possible.
This indicates a possible problem with the
electrical system or a related component.
— Door Open Warning Light
This indicator will illuminate when a door is
ajar/open and not fully closed.
NOTE:
If the vehicle is moving, there will also be a
single chime.
— Electric Power Steering Fault
Warning Light
This warning light will turn on when there's a
fault with the EPS (Electric Power Steering)
system. Refer to “Power Steering” in “Start-
ing And Operating” in the Owner’s Manual for
further information.
WARNING!
Continued operation with reduced assist
could pose a safety risk to yourself and
others. Service should be obtained as soon
as possible.
— Electronic Throttle Control (ETC)
Warning Light
This warning light will illuminate to indicate
a problem with the Electronic Throttle Con-
trol (ETC) system. If a problem is detected
while the vehicle is running, the light will
either stay on or flash depending on the
nature of the problem. Cycle the ignition
when the vehicle is safely and completely
stopped and the transmission is placed in the
PARK position. The light should turn off. If
GETTING TO KNOW YOUR INSTRUMENT PANEL
74

the light remains on with the vehicle running,
your vehicle will usually be drivable; however,
see an authorized dealer for service as soon
as possible.
NOTE:
This light may turn on if the accelerator and
brake pedals are pressed at the same time.
If the light continues to flash when the ve-
hicle is running, immediate service is re-
quired and you may experience reduced per-
formance, an elevated/rough idle, or engine
stall and your vehicle may require towing. The
light will come on when the ignition is placed
in the ON/RUN or ACC/ON/RUN position and
remain on briefly as a bulb check. If the light
does not come on during starting, have the
system checked by an authorized dealer.
— Engine Coolant Temperature Warn-
ing Light
This warning light warns of an overheated
engine condition. If the engine coolant tem-
perature is too high, this indicator will illumi-
nate and a single chime will sound. If thetemperature reaches the upper limit, a con-
tinuous chime will sound for four minutes or
until the engine is able to cool: whichever
comes first.
If the light turns on while driving, safely pull
over and stop the vehicle. If the A/C system is
on, turn it off. Also, shift the transmission
into NEUTRAL and idle the vehicle. If the
temperature reading does not return to nor-
mal, turn the engine off immediately and call
for service.
Refer to “If Your Engine Overheats” in “In
Case Of Emergency” for further information.
— Hood Open Warning Light
This indicator will illuminate when the hood
is ajar/open and not fully closed.
NOTE:
If the vehicle is moving, there will also be a
single chime.
— Liftgate Open Warning Light
This warning light will illuminate when the
liftgate is open.NOTE:
If the vehicle is moving, there will also be a
single chime.
— Oil Pressure Warning Light
This warning light will illuminate to indicate
low engine oil pressure. If the light turns on
while driving, stop the vehicle, shut off the
engine as soon as possible, and contact an
authorized dealer. A chime will sound when
this light turns on.
Do not operate the vehicle until the cause is
corrected. This light does not indicate how
much oil is in the engine. The engine oil level
must be checked under the hood.
— Oil Temperature Warning Light
This warning light will illuminate to indicate
the engine oil temperature is high. If the light
turns on while driving, stop the vehicle and
shut off the engine as soon as possible. Wait
for oil temperature to return to normal levels.
— Seat Belt Reminder Warning Light
This warning light indicates when the driver
or passenger seat belt is unbuckled. When
the ignition is first placed in the ON/RUN or
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ACC/ON/RUN position and if the driver’s seat
belt is unbuckled, a chime will sound and the
light will turn on. When driving, if the driver
or front passenger seat belt remains unbuck-
led, the Seat Belt Reminder Light will flash or
remain on continuously and a chime will
sound.
Refer to “Occupant Restraint Systems” in
“Safety” for further information.
— Transmission Temperature Warning
Light — If Equipped
This warning light will illuminate to warn of a
high transmission fluid temperature. This
may occur with strenuous usage such as
trailer towing. If this light turns on, stop the
vehicle and run the engine at idle or slightly
faster, with the transmission in PARK or
NEUTRAL, until the light turns off. Once the
light turns off, you may continue to drive
normally.
WARNING!
If you continue operating the vehicle when
the Transmission Temperature Warning
Light is illuminated you could cause the
fluid to boil over, come in contact with hot
engine or exhaust components and cause
a fire.
CAUTION!
Continuous driving with the Transmission
Temperature Warning Light illuminated
will eventually cause severe transmission
damage or transmission failure.
— Vehicle Security Warning Light — If
Equipped
This light will flash at a fast rate for approxi-
mately 15 seconds when the vehicle security
alarm is arming, and then will flash slowly
until the vehicle is disarmed.
Yellow Warning Lights
— Service Adaptive Cruise Control
Warning Light
This light will turn on when the ACC system is
not operating and needs service. For further
information, refer to “Adaptive Cruise Control
(ACC)” in “Starting And Operating.”
— Anti-Lock Brake (ABS) Warning
Light
This warning light monitors the Anti-Lock
Brake System (ABS). The light will turn on
when the ignition is placed in the ON/RUN or
ACC/ON/RUN position and may stay on for as
long as four seconds.
If the ABS light remains on or turns on while
driving, then the Anti-Lock portion of the
brake system is not functioning and service is
required as soon as possible. However, the
conventional brake system will continue to
operate normally, assuming the Brake Warn-
ing Light is not also on.
GETTING TO KNOW YOUR INSTRUMENT PANEL
76

If the ABS light does not turn on when the
ignition is placed in the ON/RUN or ACC/ON/
RUN position, have the brake system in-
spected by an authorized dealer.
— Electronic Stability Control (ESC) Off
Warning Light — If Equipped
This warning light indicates the Electronic
Stability Control (ESC) is off.
Each time the ignition is turned to ON/RUN
or ACC/ON/RUN, the ESC system will be on,
even if it was turned off previously.
The ESC OFF indicator will be lit any time the
Traction Mode is set to Sport, Track or Full
OFF in Drive Modes.
— Electronic Stability Control (ESC)
Active Warning Light — If Equipped
This warning light will indicate when the
Electronic Stability Control system is Active.
The “ESC Indicator Light” in the instrument
cluster will come on when the ignition is
placed in the ON/RUN or ACC/ON/RUN posi-
tion, and when ESC is activated. It should go
out with the engine running. If the “ESC
Indicator Light” comes on continuously withthe engine running, a malfunction has been
detected in the ESC system. If this warning
light remains on after several ignition cycles,
and the vehicle has been driven several miles
(kilometers) at speeds greater than 30 mph
(48 km/h), see an authorized dealer as soon
as possible to have the problem diagnosed
and corrected.
• The “ESC Off Indicator Light” and the
“ESC Indicator Light” come on momen-
tarily each time the ignition is placed in the
ON/RUN or ACC/ON/RUN position.
• The ESC system will make buzzing or click-
ing sounds when it is active. This is normal;
the sounds will stop when ESC becomes
inactive.
• This light will come on when the vehicle is
in an ESC event.— Service LaneSense Warning Light
— If Equipped
This warning light will illuminate when the
LaneSense system is not operating and re-
quires service. Please see an authorized
dealer.
— LaneSense Warning Light — If
Equipped
The LaneSense Warning Light will be solid
yellow when the vehicle is approaching a lane
marker. The warning light will flash when the
vehicle is crossing the lane marker.
Refer to “LaneSense — If Equipped" in
“Starting And Operating” for further informa-
tion.
— Loose Fuel Filler Cap Warning Light
— If Equipped
This warning light will illuminate when the
fuel filler cap is loose. Properly close the filler
cap to disengage the light. If the light does
not turn off, please see an authorized dealer.
— Low Fuel Warning Light
When the fuel level reaches approximately
2.4 gal (9.1 L) this light will turn on, and
remain on until fuel is added.
A single warning chime will sound with Low
Fuel Warning.
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— Low Washer Fluid Warning Light —
If Equipped
This warning light will illuminate when the
windshield washer fluid is low.
— Engine Check/Malfunction Indica-
tor Warning Light (MIL)
The Engine Check/Malfunction Indicator
Light (MIL) is a part of an Onboard Diagnostic
System called OBD II that monitors engine
and automatic transmission control systems.
This warning light will illuminate when the
ignition is in the ON/RUN position before
engine start. If the bulb does not come on
when turning the ignition switch from OFF to
ON/RUN, have the condition checked
promptly.
Certain conditions, such as a loose or missing
gas cap, poor quality fuel, etc., may illumi-
nate the light after engine start. The vehicle
should be serviced if the light stays on
through several typical driving styles. In most
situations, the vehicle will drive normally and
will not require towing.When the engine is running, the MIL may
flash to alert serious conditions that could
lead to immediate loss of power or severe
catalytic converter damage. The vehicle
should be serviced by an authorized dealer as
soon as possible if this occurs.WARNING!
A malfunctioning catalytic converter, as
referenced above, can reach higher tem-
peratures than in normal operating condi-
tions. This can cause a fire if you drive
slowly or park over flammable substances
such as dry plants, wood, cardboard, etc.
This could result in death or serious injury
to the driver, occupants or others.
CAUTION!
Prolonged driving with the Malfunction
Indicator Light (MIL) on could cause dam-
age to the vehicle control system. It also
could affect fuel economy and driveability.
If the MIL is flashing, severe catalytic
converter damage and power loss will soon
occur. Immediate service is required.
— AdBlue® (UREA) Injection System
Failure Warning Light — If Equipped
This warning light will illuminate along with a
dedicated message on the display (If
Equipped) if an unknown fluid not conform-
ing with acceptable characteristics is in-
serted, or if an average consumption of
AdBlue
®(UREA) over 50% is detected. Con-
tact an authorized dealer as soon as possible.
If the problem is not solved, a specific mes-
sage will appear on the Instrument Cluster
Display whenever a certain threshold is
reached until it will no longer be possible to
start the engine.
When about 125 mi (200 km) are remaining
before the AdBlue
®tank is empty, a continu-
ous dedicated message will appear on the
instrument panel, accompanied by a buzzer
sound (If Equipped).
SERV4WD— Service 4WD Warning Light — If
Equipped
This warning light will illuminate to signal a
fault with the 4WD system. If the light stays
on or comes on during driving, it means that
the 4WD system is not functioning properlyGETTING TO KNOW YOUR INSTRUMENT PANEL
78

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.
— NEUTRAL Indicator Light — If
Equipped
This light alerts the driver that the 4WD
power transfer case is in the NEUTRAL mode
and the front and rear driveshafts are disen-
gaged from the powertrain.
— Rear Fog Indicator — If Equipped
This indicator light will illuminate when the
rear fog lights are on.
— Wait To Start Light — If Equipped
This indicator light will illuminate for ap-
proximately two seconds when the ignition is
turned to the RUN position. Its duration may
be longer based on colder operating condi-
tions. Vehicle will not initiate start until tell-
tale is no longer displayed.Refer to “Starting The Engine” in “Starting
And Operating” for further information.
NOTE:
The “Wait To Start” telltale may not illumi-
nate if the intake manifold temperature is
warm enough.
— Low Diesel Exhaust Emissions Addi-
tive AdBlue® (UREA) Indicator Light — If
Equipped
The Low Diesel Exhaust Emissions Additive
AdBlue®(UREA) indicator light illuminates
when the AdBlue®level is low.
Fill the AdBlue
®tank as soon as possible with
at least 1.3 gallons (5 liters) of AdBlue®.
If filling the tank is done with a remaining
range of AdBlue
®in the tank equal to zero,
you may need to wait 2 minutes before start-
ing the vehicle.
Refer to “Starting And Operating” for further
information.
— Water In Fuel Indicator Light — If
Equipped
The “Water In Fuel Indicator Light” will illu-
minate when there is water detected in the
fuel filter. If this light remains on, DO NOT
start the vehicle before you drain the water
from the fuel filter to prevent engine damage,
and please see an authorized dealer.
CAUTION!
The presence of water in the fuel system
circuit may cause severe damage to the
injection system and irregular engine op-
eration. If the indicator light is illumi-
nated, contact an authorized dealer as
soon as possible to bleed the system. If the
above indications come on immediately
after refuelling, water has probably been
poured into the tank: switch the engine off
immediately and contact an authorized
dealer.
81

ONBOARD DIAGNOSTIC
SYSTEM — OBD II
Your vehicle is equipped with a sophisticated
Onboard Diagnostic system called OBD II.
This system monitors the performance of the
emissions, engine, and transmission control
systems. When these systems are operating
properly, your vehicle will provide excellent
performance and fuel economy, as well as
engine emissions well within current govern-
ment regulations.
If any of these systems require service, the
OBD II system will turn on the Malfunction
Indicator Light (MIL). It will also store diag-
nostic codes and other information to assist
your service technician in making repairs.
Although your vehicle will usually be drivable
and not need towing, see an authorized
dealer for service as soon as possible.
CAUTION!
• Prolonged driving with the MIL on could
cause further damage to the emission
control system. It could also affect fuel
economy and driveability. The vehicle
must be serviced before any emissions
tests can be performed.
• If the MIL is flashing while the vehicle is
running, severe catalytic converter dam-
age and power loss will soon occur. Im-
mediate service is required.
Onboard Diagnostic System (OBD II)
Cybersecurity
Your vehicle is required to have an Onboard
Diagnostic system (OBD II) and a connection
port to allow access to information related to
the performance of your emissions controls.
Authorized service technicians may need to
access this information to assist with the
diagnosis and service of your vehicle and
emissions system.
WARNING!
• ONLY an authorized service technician
should connect equipment to the OBD II
connection port in order to read the VIN,
diagnose, or service your vehicle.
• If unauthorized equipment is connected
to the OBD II connection port, such as a
driver-behavior tracking device, it may:
• Be possible that vehicle systems,
including safety related systems,
could be impaired or a loss of ve-
hicle control could occur that may
result in an accident involving seri-
ous injury or death.
• Access, or allow others to access,
information stored in your vehicle
systems, including personal infor-
mation.
For further information, refer to “Cybersecu-
rity” in “Multimedia”.
85