check engine light JEEP CHEROKEE 2023 Owners Manual

10
Yellow Warning Lights
Adaptive Cruise Control (ACC) Fault Warning Light
Úpage 70
Electric Park Brake Warning Light
Úpage 70
Anti-Lock Brake System (ABS) Warning Light
Úpage 70
Electronic Stability Control (ESC) Active Warning Light
Úpage 71
Electronic Stability Control (ESC) OFF Warning Light
Úpage 71
Low Fuel Warning Light
Úpage 71
Low Washer Fluid Warning Light
Úpage 71
Service LaneSense Warning Light
Úpage 71
LaneSense Warning Light
Úpage 71
Engine Check/Malfunction Indicator (MIL) Warning Light
Úpage 71
Service 4WD Warning Light
Úpage 72
Service Forward Collision Warning (FCW) Light
Úpage 72
Service Stop/Start System Warning Light
Úpage 72
Cruise Control Fault Warning Light
Úpage 72
Tire Pressure Monitoring System (TPMS) Warning Light
Úpage 72
Yellow Warning Lights

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16GETTING TO KNOW YOUR VEHICLE
SENTRY KEY
The Sentry Key Immobilizer system prevents unauthorized
vehicle operation by disabling the engine. The system
does not need to be armed or activated. Operation is
automatic, regardless of whether the vehicle is locked or
unlocked.
The system uses a key fob, keyless push button ignition
and a Radio Frequency (RF) receiver to prevent
unauthorized vehicle operation. Therefore, only key fobs
that are programmed to the vehicle can be used to start
and operate the vehicle. The system cannot reprogram a
key fob obtained from another vehicle.
After placing the ignition in the ON/RUN position, the
Vehicle Security Light will turn on for three seconds for a
bulb check. If the light remains on after the bulb check, it
indicates that there is a problem with the electronics. In
addition, if the light begins to flash after the bulb check, it
indicates that someone attempted to start the engine with
an invalid key fob. In the event that a valid key fob is used
to start the engine but there is an issue with the vehicle
electronics, the engine will start and shut off after two
seconds.
If the Vehicle Security Light turns on during normal vehicle
operation (vehicle running for longer than 10 seconds), it
indicates that there is a fault in the electronics. Should
this occur, have the vehicle serviced as soon as possible
by an authorized dealer. All of the key fobs provided with your new vehicle have
been programmed to the vehicle electronics
Úpage 262.
NOTE:A key fob that has not been programmed is also
considered an invalid key.
IGNITION SWITCH
IGNITION NODE MODULE (IGNM) —
I
F EQUIPPED
The Ignition Node Module (IGNM) operates similar to an
ignition switch. It has four operating positions, three with
detents and one that is spring-loaded. The detent
positions are OFF, ACC, and ON/RUN. The START position
is a spring-loaded momentary contact position. When
released from the START position, the switch
automatically returns to the ON/RUN position.

Ignition Switch

KEYLESS ENTER ‘N GO™ IGNITION
(I
F EQUIPPED)
This feature allows the driver to operate the ignition switch
with the push of a button as long as the key fob is in the
passenger compartment.
The START/STOP ignition button has several operating
modes that are labeled and will illuminate when in
position. These modes are OFF, ACC, ON/RUN, and START.
CAUTION!
The Sentry Key Immobilizer system is not compatible
with some aftermarket Remote Start systems. Use of
these systems may result in vehicle starting problems
and loss of security protection.
1 — OFF
2 — ACC
3 — ON/RUN
4 — START

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52GETTING TO KNOW YOUR VEHICLE

Rear Cargo Power Outlet Fuse Locations

POWER INVERTER — IF EQUIPPED

Rear Center Console Power Inverter

There is a 115 Volt, 150 W inverter outlet located on the
back of the center console to convert DC current to AC
current. This outlet can power cellular phones, electronics
and other low power devices requiring power up to 150 W.
Certain game consoles exceed this power limit, as will
most power tools.
To turn on the power inverter outlet, simply plug in the
device. The outlet automatically turns off when the device
is unplugged.
The power inverter is designed with built-in overload
protection. If the power rating of 150 W is exceeded, the
power inverter automatically shuts down. Once the
electrical device has been removed from the outlet the
inverter should automatically reset. To avoid overloading
the circuit, check the power ratings on electrical devices
prior to using the inverter.
1 — F81 Fuse 20A Yellow Rear Power Outlet (battery pow
-
ered at all times)
2 — F91 Fuse 20A Yellow Rear Power Outlet (powered
when the ignition switch is in the ON or ACC position)
WARNING!
To avoid serious injury or death:
 Only devices designed for use in this type of outlet
should be inserted into any 12 Volt outlet.
 Do not touch with wet hands.
 Close the lid when not in use and while driving the
vehicle.
 If this outlet is mishandled, it may cause an electric
shock and failure.
CAUTION!
Many accessories that can be plugged in draw power
from the vehicle's battery, even when not in use (i.e.,
cellular phones, etc.). Eventually, if plugged in long
enough, the vehicle's battery will discharge suffi -
ciently to degrade battery life and/or prevent the
engine from starting.
 Accessories that draw higher power (i.e., coolers,
vacuum cleaners, lights, etc.) will degrade the
battery even more quickly. Only use these intermit -
tently and with greater caution.
 After the use of high power draw accessories, or long
periods of the vehicle not being started (with acces -
sories still plugged in), the vehicle must be driven a
sufficient length of time to allow the generator to
recharge the vehicle's battery.
WARNING!
To avoid serious injury or death:
 Do not insert any objects into the receptacles.
 Do not touch with wet hands.
 Close the lid when not in use.
 If this outlet is mishandled, it may cause an electric
shock and failure.

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GETTING TO KNOW YOUR INSTRUMENT PANEL67
INSTRUMENT CLUSTER DISPLAY
S
ELECTABLE ITEMS
The instrument cluster display can be used to view the
following main menu items:
NOTE:Depending on the vehicles options, feature settings may
vary Úpage 63.
BATTERY SAVER ON/BATTERY SAVER
M
ODE MESSAGE — ELECTRICAL LOAD
R
EDUCTION ACTIONS — IF EQUIPPED
This vehicle is equipped with an Intelligent Battery Sensor
(IBS) to perform additional monitoring of the electrical
system and status of the vehicle battery.
In cases when the IBS detects charging system failure, or
the vehicle battery conditions are deteriorating, electrical
load reduction actions will take place to extend the driving
time and distance of the vehicle. This is done by reducing
power to or turning off non-essential electrical loads.
Load reduction is only active when the engine is running.
It will display a message if there is a risk of battery
depletion to the point where the vehicle may stall due to
lack of electrical supply, or will not restart after the current
drive cycle. When load reduction is activated, the message “Battery
Saver On” or “Battery Saver Mode” will appear in the
instrument cluster display.
These messages indicate the vehicle battery has a low
state of charge and continues to lose electrical charge at
a rate that the charging system cannot sustain.
NOTE:

The charging system is independent from load reduc -
tion. The charging system performs a diagnostic on the
charging system continuously.
 If the Battery Charge Warning Light is on it may indicate
a problem with the charging system
Úpage 69.
The electrical loads that may be switched off (if equipped),
and vehicle functions which can be effected by load
reduction:
 Heated Seats / Vented Seats / Heated Wheel
 Heated / Cooled Cup Holders — If Equipped
 Rear Defroster And Heated Mirrors
 HVAC System
 150W Power Inverter System
 Audio and Telematics System
Loss of the battery charge may indicate one or more of the
following conditions:
 The charging system cannot deliver enough electrical
power to the vehicle system because the electrical
loads are larger than the capability of charging system.
The charging system is still functioning properly. 
Turning on all possible vehicle electrical loads
(e.g. HVAC to max settings, exterior and interior
lights, overloaded power outlets +12 Volts, 150W,
USB ports) during certain driving conditions
(city driving, towing, frequent stopping).
 Installing options like additional lights, upfitter elec -
trical accessories, audio systems, alarms and similar
devices.
 Unusual driving cycles (short trips separated by long
parking periods).
 The vehicle was parked for an extended period of time
(weeks, months).
 The battery was recently replaced and was not charged
completely.
 The battery was discharged by an electrical load left on
when the vehicle was parked.
 The battery was used for an extended period with the
engine not running to supply radio, lights, chargers,
+12 Volts portable appliances like vacuum cleaner’s,
game consoles and similar devices.
What to do when an electrical load reduction action
message is present (“Battery Saver On” or “Battery
Saver Mode”)
During a trip:
 Reduce power to unnecessary loads if possible:
 Turn off redundant lights (interior or exterior).
 Check what may be plugged in to power outlets
+12 Volts, 150W, USB ports.
 Check HVAC settings (blower, temperature).
 Check the audio settings (volume).
Speedometer Vehicle Info Stop/Start
Audio
Driver Assist Fuel Economy
Messages Screen Setup Trip
3

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GETTING TO KNOW YOUR INSTRUMENT PANEL69
The light will also turn on when the parking brake is
applied with the ignition switch in the ON/RUN position.
NOTE:This light only shows 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. Contact
an authorized dealer as soon as possible.
This indicates a possible problem with the electrical
system or a related component.
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.
Contact an authorized dealer as soon as possible.
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 (EPS) Fault
Warning Light
This warning light will turn on when there's a
fault with the EPS system Úpage 88.
Electronic Throttle Control (ETC) Warning
Light
This warning light will illuminate to indicate a
problem with the 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 (P) position. The light should turn off.
If 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 vehicle is running,
immediate service is required and you may experience
reduced performance, 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 Warning
Light
This light warns of an overheated engine
condition. If the engine coolant temperature is
too high, this indicator will illuminate and a
single chime will sound.
If the light turns on while driving, safely pull over and stop
the vehicle. If the Air Conditioning (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
normal, turn the engine off immediately and call for
service
Úpage 203.
Hood Open Warning Light
This warning light will illuminate when the hood
is left 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. A chime will sound when
this light turns on and a message “Oil Pressure
Low” will display in the message screen. If the
WARNING!
Continued operation with reduced assist could pose a
safety risk to yourself and others. Service should be
obtained as soon as possible.
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70GETTING TO KNOW YOUR INSTRUMENT PANEL
light turns on while driving, pull the vehicle to the side of
the road at a safe location, stop the vehicle, shut off the
engine as soon as possible, check the oil level and correct
the oil level if it is low. Contact an authorized dealer.
Do not operate the vehicle until the cause is corrected.
This light may or may not indicate how much oil is in the
engine. If the oil level is low and corrected, the engine can
be restarted. Otherwise the vehicle should be serviced by
an authorized dealer
Úpage 208.
NOTE:The light may flash, a message in the center of the dash
may display momentarily “low oil pressure” and a chime
may occur during sharp cornering maneuvers. If this
happen it may indicate a low oil level. The oil level should
be checked and dealer service performed if this occurs.
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.
Transmission Temperature Warning Light
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 (P) or NEUTRAL (N), until the light
turns off. Once the light turns off, you may continue to
drive normally.
Vehicle Security Warning Light —
If Equipped
This light will flash at a fast rate for
approximately 15 seconds when the Vehicle
Security System is arming, and then will flash
slowly until the vehicle is disarmed.
YELLOW WARNING LIGHTS
Adaptive Cruise Control (ACC) Fault
Warning Light — If Equipped
This warning light will illuminate to indicate a
fault in the ACC system. Contact a local
authorized dealer for service
Úpage 92.
Electric Park Brake Warning Light
This warning light will illuminate to indicate the
Electric Park Brake is not functioning properly
and service is required. Contact an authorized
dealer.
Anti-Lock Brake System (ABS) Warning
Light
This warning light monitors the 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 Warning Light is
also not on.
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 inspected by an authorized dealer.CAUTION!
If the vehicle is driven with low oil levels severe engine
damage can occur. Have the vehicle checked
immediately.
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.

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GETTING TO KNOW YOUR INSTRUMENT PANEL71
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 position, and when ESC is
activated. It should go out with the engine running. If the
ESC Indicator Light comes on continuously with the 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 momentarily each time the ignition is placed
in the ON/RUN or ACC/ON/RUN position.
 The ESC system will make buzzing or clicking 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.
Electronic Stability Control (ESC) OFF
Warning Light — If Equipped
This warning light indicates the 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.
Low Fuel Warning Light
When the fuel level reaches approximately
2 gal (7.5 L) this light will turn on, and remain
on until fuel is added. A single warning chime
will sound with Low Fuel Warning.
Low Washer Fluid Warning Light —
If Equipped
This warning light will illuminate when the
windshield washer fluid is low Úpage 212.
Service LaneSense Warning Light —
If Equipped
This warning light will illuminate when the
LaneSense system is not operating and
requires 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
Úpage 109.
Engine Check/Malfunction Indicator (MIL)
Warning Light
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 illuminate 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 can reach higher
temperatures than in normal operating conditions. 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 damage 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.
3

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GETTING TO KNOW YOUR INSTRUMENT PANEL73
YELLOW INDICATOR LIGHTS
Active Speed Limiter Fault Indicator
Light — If Equipped
This light will illuminate to signal when there is
a fault detected with the Active Speed Limiter.
Forward Collision Warning (FCW) Off
Indicator Light — If Equipped
This light indicates that Forward Collision
Warning is off Úpage 154.
4WD Low Indicator Light — If Equipped
This light alerts the driver that the vehicle is in
the 4WD 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 increased torque at the wheels
Úpage 85.
Rear Axle Lock Indicator Light
This light indicates when the rear axle lock has
been activated.
Wait To Start Indicator Light — If Equipped
This indicator light will illuminate for
approximately two seconds when the ignition is
turned to the RUN position. Its duration may be
longer based on colder operating conditions.
Vehicle will not initiate start until telltale is no longer
displayed.
NOTE:The Wait To Start telltale may not illuminate if the intake
manifold temperature is warm enough.
Water In Fuel Indicator Light — If Equipped
The Water In Fuel Indicator Light will illuminate
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.
GREEN INDICATOR LIGHTS
Active Speed Limiter SET Indicator Light
This light will turn on when the Active Speed
Limiter is on and set to a specific speed.
Adaptive Cruise Control (ACC) Set With
Target Vehicle Indicator Light —
If Equipped
This will display when the ACC is set and a
vehicle in front is detected Úpage 92.
CAUTION!
The TPMS has been optimized for the original equip -
ment tires and wheels. TPMS pressures and warning
have been established for the tire size equipped on
your vehicle. Undesirable system operation 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 after -
market tire sealants may cause the Tire Pressure
Monitoring System (TPMS) sensor to become inopera -
ble. After using an aftermarket tire sealant it is recom -
mended that you take your vehicle to an authorized
dealer to have your sensor function checked.
CAUTION!
The presence of water in the fuel system circuit may
cause severe damage to the injection system and
irregular engine operation. If the indicator light is
illuminated, contact an authorized dealer as soon as
possible to bleed the system. If the previously
mentioned indications come on immediately after
refuelling, water has probably been poured into the
tank: switch the engine off immediately and contact an
authorized dealer.
3

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GETTING TO KNOW YOUR INSTRUMENT PANEL75
(Continued)
Cruise Control Ready Indicator Light
This light will turn on when the Cruise Control
has been turned on, but not set Úpage 90.
BLUE INDICATOR LIGHTS
High Beam Indicator Light
This indicator light will illuminate to indicate
that the high beam headlights are on. With the
low beams activated, push the multifunction
lever forward (toward the front of the vehicle) to
turn on the high beams. Pull the multifunction lever
rearward (toward the rear of the vehicle) to turn off the
high beams. If the high beams are off, pull the lever toward
you for a temporary high beam on, “flash to pass”
scenario.
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 government regulations.
If any of these systems require service, the OBD II system
will turn on the Malfunction Indicator Light (MIL). It will
also store diagnostic 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.
ONBOARD DIAGNOSTIC SYSTEM
(OBD II) C
YBERSECURITY
Your vehicle is required to have an 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
Úpage 126.
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
Maintenance (I/M), this check verifies the
Malfunction Indicator Light is functioning and is
not on when the engine is running, and that the
OBD II system is ready for testing.
The OBD ll system may not be ready if your vehicle was
recently serviced, recently had a depleted battery or a
battery replacement. If the OBD ll system should be
determined not ready for the I/M test, your vehicle may fail
the test.
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 damage and power loss
will soon occur. Immediate service is required.
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 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.
WARNING!
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76GETTING TO KNOW YOUR INSTRUMENT PANEL
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 following:

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
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 10 seconds and then
return to being fully illuminated until you turn OFF
the ignition or start the engine. This means that
your vehicle's OBD II system is not ready and you
should not proceed to the I/M station.
 The MIL will not flash at all and will remain fully illu -
minated until you place the ignition in the off posi -
tion or start the engine. This means that your
vehicle's OBD II system is ready and you can
proceed to the I/M station. If your OBD II system is
not ready, you should see an
authorized dealer or repair facility. If your vehicle was
recently serviced or had a battery failure or replacement,
you may need to do nothing more than drive your vehicle
as you normally would in order for your OBD II system to
update. A recheck with the previously mentioned test
routine may then indicate that the system is now ready.

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