light JEEP GLADIATOR 2023 Workshop Manual

140GETTING TO KNOW YOUR INSTRUMENT PANEL
Front Fog Indicator Light — If Equipped
This indicator light will illuminate when
the front fog lights are on Úpage 56.
Parking/Headlights On Indicator Light
This indicator light will illuminate when
the parking lights or headlights are
turned on.
Stop/Start Active Indicator Light —
If Equipped
This indicator light will illuminate when
the Stop/Start function is in “Autostop”
mode.
Turn Signal Indicator Lights
When the left or right turn signal is
activated, the turn signal indicator will
flash independently and the
corresponding exterior turn signal lamps
will flash. Turn signals can be activated when the
multifunction lever is moved down (left) or up
(right).
NOTE:
A continuous chime will sound if the vehicle is
driven more than 1 mile (1.6 km) with either
turn signal on.
Check for an inoperative outside light bulb if
either indicator flashes at a rapid rate.
Rear Seat Belt Fastened Indicator Light —
If Equipped With A Premium Instrument
Cluster
This light indicates when a rear seat belt
has been buckled in the second row. A
telltale will display in the upper right
corner of the instrument cluster display
to correspond to the specific seating position once
the seat belt has been buckled Ú page 299.
WHITE INDICATOR LIGHTS
Adaptive Cruise Control (ACC) Ready
Indicator Light — If Equipped With a
Premium Instrument Cluster
This light will turn on when the vehicle
equipped with Adaptive Cruise Control
(ACC) has been turned on, but not set.
Adaptive Cruise Control (ACC) Ready
Indicator Light — If Equipped With a Base
Instrument Cluster
This light will turn on when the vehicle
equipped with ACC has been turned on,
but not set.
Adaptive Cruise Control (ACC) Set Indicator
Light — If Equipped With a Base Instrument
Cluster
This light will turn on when the vehicle
equipped with ACC has been turned on,
but not set.
Two Wheel Drive High Indicator Light —
If Equipped With A Premium Instrument
Cluster
This light alerts the driver that the vehicle
is in the two wheel drive high mode.
Rear Seat Belt Fastened Indicator Light —
If Equipped With A Base Instrument
Cluster
This light indicates when a rear seat belt
has been buckled in the second row. A
telltale will display in the upper right
corner of the instrument cluster display
to correspond to the specific seating position once
the seat belt has been buckled.

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GETTING TO KNOW YOUR INSTRUMENT PANEL141
Rear Seat Belt Reminder Indicator Light —
If Equipped With A Base Instrument
Cluster
This light indicates when a rear seat belt
is unbuckled in the second row. When
the ignition is first placed in the ON/RUN
or ACC/ON/RUN position, and if a seat
belt in the second row is unbuckled, a light
corresponding to the specific seat will turn on in
the upper right portion of the instrument cluster
display, momentarily replacing the configurable
corner information. If a second row seat belt that
was buckled at the start of the trip is unbuckled,
the Rear Seat Belt Reminder Light will change from
the buckled to the unbuckled symbol, and a chime
will sound.
Rear Seat Unoccupied Indicator Light —
If Equipped
This light indicates when the rear
passenger seats are unoccupied, and will
illuminate in the upper right portion of
the instrument cluster display,
momentarily replacing the configurable corner
information.
Cruise Control Ready Indicator Light —
If Equipped With A Premium Instrument
Cluster
This light will turn on when the cruise
control has been turned on, but not set.
Cruise Control SET Indicator Light —
If Equipped With A Base Instrument
Cluster
This indicator light will illuminate when
the cruise control is set.
Cruise Control Ready Indicator Light —
If Equipped With A Base Instrument
Cluster
This light will turn on when cruise control
has been turned on, but not set.
Selec Speed Control (SSC) Indicator
Light — If Equipped
This light will turn on when Selec Speed
Control is activated. Selec Speed Control
is available in 4WD Low ONLY.
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.
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142GETTING TO KNOW YOUR INSTRUMENT PANEL
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 Ú page 214.
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 and/or provinces that require
an Inspection and Maintenance (I/M),
this check verifies the Malfunction
Indicator Light (MIL) is functioning and is
not on when the engine is running, and that the
OBD II system is ready for testing.
The OBD II system may not be ready if your vehicle
was recently serviced, recently had a depleted
battery or a battery replacement. 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 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 (MIL) symbol come on as part of
a normal bulb check.
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, infor -
mation stored in your vehicle systems,
including personal information.

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144
STARTING AND OPERATING
STARTING THE ENGINE — GASOLINE
ENGINE (IF EQUIPPED)
Before starting your vehicle, adjust your seat,
adjust both inside and outside mirrors, and fasten
your seat belts.
MANUAL TRANSMISSION — IF EQUIPPED
Apply the parking brake, place the gear selector in
NEUTRAL, and press the clutch pedal before
starting the vehicle. This vehicle is equipped with a
clutch interlocking ignition system. It will not start
unless the clutch pedal is pressed to the floor.
Four-Wheel Drive Models Only
In 4L mode, if the vehicle is stalled, the engine will
start regardless of whether or not the clutch pedal
is pressed to the floor. This feature enhances
off-road performance by allowing the vehicle to
start when in 4L without having to press the clutch
pedal. The 4WD LOW Indicator Light will illuminate
when the transfer case has been shifted into this
mode.
AUTOMATIC TRANSMISSION —
I
F EQUIPPED
Start the vehicle with the gear selector in the PARK
position (vehicle can also be started in NEUTRAL).
Apply the brake before shifting to any driving
range.
NORMAL STARTING
To Turn On The Engine Using The ENGINE START/
STOP Button

1. The transmission must be in PARK or NEUTRAL.

2. Press and hold the brake pedal while pushing
the ENGINE START/STOP button once.
3. The system starts the vehicle. If the vehicle fails to start, the starter will disengage
automatically after 10 seconds.
4. If you wish to stop the cranking of the engine prior to the engine starting, push the ENGINE
START/STOP button again.
To Turn Off The Engine Using The ENGINE START/
STOP Button

1. Place the gear selector in PARK, then push and release the ENGINE START/STOP button.
The ignition will return to the OFF position.

2. If the gear selector is not in PARK (with vehicle stopped) and the ENGINE START/STOP button
is pushed once, the transmission will automat -
ically select PARK and the engine will turn off,
WARNING!
When exiting the vehicle, always remove the
key fob from the ignition and lock your vehicle.
Never leave children alone in a vehicle, or with
access to an unlocked vehicle.
Allowing children to be in a vehicle unattended
is dangerous for a number of reasons. A child
or others could be seriously or fatally injured.
Children should be warned not to touch the
parking brake, brake pedal or the gear
selector.
Do not leave the key fob in or near the vehicle,
or in a location accessible to children. A child
could operate power windows, other controls,
or move the vehicle.
Do not leave children or animals inside parked
vehicles in hot weather. Interior heat build-up
may cause serious injury or death.

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148STARTING AND OPERATING
NOTE:Engine start-up in very low ambient temperature
could result in evident white smoke. This condition
will disappear as the engine warms up.
AUTOMATIC TRANSMISSION
Start the engine with the transmission gear
selector in the PARK (P) position. Apply the brake
before shifting to any driving range.
EXTREME COLD WEATHER
The cartridge block heater clips into the engine
block near the water jacket and transfers heat to
the coolant. It requires a 110–115 Volt AC
electrical outlet with a grounded, three-wire
extension cord. Its use is recommended for
environments that routinely fall below -10°F
(-23°C). It should be used when the vehicle has not
been running overnight or longer periods and
should be plugged in two hours prior to start. Its
use is required for cold starts with temperatures
under -20°F (-28°C).
NOTE:The engine block heater and heater cord are
factory installed options. If your vehicle is not
equipped, engine block heaters and heater cords
are available from an authorized Mopar® dealer.
A 12 Volt heater built into the fuel filter housing
aids in preventing fuel gelling. It is controlled by
a built-in thermostat.
A Diesel Pre-Heat system both improves engine
starting and reduces the amount of white
smoke generated by a warming engine.
NORMAL STARTING
Observe the instrument cluster lights when
starting the engine.
NOTE:Normal starting of either a cold or a warm engine is
obtained without pumping or pressing the accel -
erator pedal.

1. Always apply the parking brake.

2. Press and hold the brake pedal while pushing the ENGINE START/STOP button once.
NOTE:A delay of the start of up to five seconds is possible
under very cold conditions. The “Wait to Start”
telltale will be illuminated during the preheat
process. When the engine “Wait To Start” telltale
turns off the engine will automatically crank.
Do not leave the key fob in or near the vehicle,
or in a location accessible to children, and do
not leave the ignition of a vehicle equipped
with Keyless Enter ‘n Go™ in the ACC or ON/
RUN position. A child could operate power
windows, other controls, or move the vehicle.
Do not leave children or animals inside parked
vehicles in hot weather. Interior heat build-up
may cause serious injury or death.
CAUTION!
The engine is allowed to crank as long as
25 seconds. If the engine fails to start during
this period, please wait at least two minutes
for the starter to cool before repeating start
procedure.
If the Water in Fuel Indicator Light remains on,
DO NOT START engine before you drain the
water from the fuel filters to avoid engine
damage Ú page 368.
WARNING!
CAUTION!
If the Water in Fuel Indicator Light remains on,
DO NOT START the engine before you drain the
water from the fuel filters to avoid engine
damage Úpage 368.

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STARTING AND OPERATING149
(Continued)
3. The system will automatically engage the
starter to crank the engine. If the vehicle fails
to start, the starter will disengage automat-
ically after 25 seconds.
4. If you wish to stop the cranking of the engine prior to the engine starting, push the ENGINE
START/STOP button again.
5. Check that the Oil Pressure Warning Light has turned off.
6. Release the parking brake.
STARTING FLUIDS
The engine is equipped with a glow plug preheating
system. If the instructions in this manual are
followed, the engine should start in all conditions
and no type of starting fluid should be used.
NORMAL OPERATION — DIESEL ENGINE
Observe the following when the diesel engine is
operating:
All message center lights are off.
Malfunction Indicator Light (MIL) is off.
Engine Oil Pressure telltale is not illuminated.
Voltmeter operation.
The voltmeter may show a gauge fluctuation at
various engine temperatures. This is caused by the
glow plug heating system. The number of cycles
and the length of the cycling operation is controlled by the engine control module. Glow plug heater
operation can run for several minutes. Once the
heater operation is complete the voltmeter needle
will stabilize.
COLD WEATHER PRECAUTIONS
Operation in ambient temperature below 32°F
(0°C) may require special considerations. The
following charts suggest these options:
Fuel Operating Range
NOTE:Use Ultra Low Sulfur Diesel (ULSD) Fuels
ONLY.

Fuel Operating Range Chart

*Number 1 ULSD Fuel should only be used where
extended arctic conditions 0°F (-18°C) exist.
WARNING!
Do not leave children or animals inside parked
vehicles in hot weather. Interior heat build-up
may cause serious injury or death.
When leaving the vehicle, always make sure
the keyless ignition node is in the OFF posi -
tion, remove the key fob from the vehicle and
lock the vehicle.
Never leave children alone in a vehicle, or with
access to an unlocked vehicle. Allowing chil -
dren to be in a vehicle unattended is
dangerous for a number of reasons. A child or
others could be seriously or fatally injured.
Children should be warned not to touch the
parking brake, brake pedal or the gear
selector.
Do not leave the key fob in or near the vehicle,
or in a location accessible to children, and do
not leave the ignition of a vehicle equipped
with Keyless Enter ‘n Go™ in the ACC or ON/
RUN position. A child could operate power
windows, other controls, or move the vehicle.
WARNING!
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STARTING AND OPERATING151
NOTE:Under certain conditions the Stop/Start system
may be temporarily disabled and the engine fan
will run after the engine is turned off to protect the
engine. These conditions are under high load and
high temperature conditions.
COOLING SYSTEM TIPS — AUTOMATIC
T
RANSMISSION
To reduce the potential for engine and
transmission overheating in high ambient
temperature conditions, take the following actions:
City Driving — When stopped, shift the transmis -
sion into NEUTRAL (N) and increase engine idle
speed.
Highway Driving — Reduce your speed.
Up Steep Hills — Select a lower transmission
gear.
Air Conditioning — Turn it off temporarily.
NOTE:If the coolant temperature is too high, the A/C will
automatically turn off.
Do Not Operate The Engine With Low Oil
Pressure
If the Low Oil Pressure Warning Light turns on while
driving, stop the vehicle and shut down the engine
as soon as possible. After the vehicle is safely
stopped, restart the engine and monitor the lamp. If the lamp is still illuminated, shut the engine off,
contact an authorized dealer, and do not operate
the vehicle until the cause is corrected. If the lamp
is no longer illuminated, the engine can be
operated, but should be taken to an authorized
dealer as soon as possible for further inspection.
NOTE:Do not operate the vehicle until the cause is
corrected. This light does not show how much oil is
in the engine. The engine oil level must be checked
under the hood.
Do Not Operate The Engine With Failed
Parts
All engine failures give some warning before the
parts fail. Be on the alert for changes in
performance, sounds, and visual evidence that the
engine requires service. Some important clues are:
Engine misfiring or vibrating severely
Sudden loss of power
Unusual engine noises
Fuel, oil or coolant leaks
Sudden change, outside the normal operating
range, in the engine operating temperature
Excessive smoke
Oil pressure drop
ENGINE BREAK-IN RECOMMENDATIONS —
GASOLINE ENGINE (IF EQUIPPED)
A long break-in period is not required for the engine
and drivetrain (transmission and axle) in your
vehicle.
Drive moderately during the first 300 miles
(500 km). After the initial 60 miles (100 km),
speeds up to 50 or 55 mph (80 or 90 km/h) are
desirable.
While cruising, brief full-throttle acceleration within
the limits of local traffic laws contributes to a good
break-in. Wide-open throttle acceleration in low
gear can be detrimental and should be avoided.
The engine oil installed in the engine at the factory
is a high-quality energy conserving type lubricant.
Oil changes should be consistent with anticipated
climate conditions under which vehicle operations
will occur.
For the recommended viscosity and quality grades
see Ú page 424.
CAUTION!
If oil pressure falls to less than normal readings,
shut the engine off immediately. Failure to do so
could result in immediate and severe engine
damage.
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152STARTING AND OPERATING
NOTE:A new engine may consume some oil during its first
few thousand miles (kilometers) of operation. This
should be considered a normal part of the break-in
and not interpreted as a problem.
ENGINE BREAK-IN RECOMMENDATIONS —
DIESEL ENGINE (IF EQUIPPED)
The diesel engine does not require a break-in
period due to its construction. Normal operation is
allowed, providing the following recommendations
are followed:
Warm up the engine before placing it under
load.
Do not operate the engine at idle for prolonged
periods.
Use the appropriate transmission gear to
prevent engine lugging.
Observe vehicle oil pressure and temperature
indicators.
Check the coolant and oil levels frequently.
Vary throttle position at highway speeds when
carrying or towing significant weight.
NOTE:Light duty operation such as light trailer towing or
no load operation will extend the time before the
engine is at full efficiency. Reduced fuel economy
and power may be seen at this time.
The engine oil installed in the engine at the factory
is a high-quality energy conserving type lubricant.
Oil changes should be consistent with anticipated
climate conditions under which vehicle operations
will occur. For recommended viscosity and quality
grades Úpage 424. NON-DETERGENT OR
STRAIGHT MINERAL OILS MUST NEVER BE USED.
PARKING BRAKE
Before exiting the vehicle, make sure that the
parking brake is fully applied. Also, be certain to
leave an automatic transmission in PARK, or
manual transmission in REVERSE or FIRST gear.
The parking brake lever is located in the center
console. To apply the parking brake, pull the lever
up as firmly as possible. To release the parking
brake, pull the lever up slightly, push the center
button, then lower the lever completely.
Parking Brake Lever

When the parking brake is applied with the ignition
switch ON, the Brake Warning Light in the
instrument cluster will illuminate.
NOTE:
When the parking brake is applied and the auto -
matic transmission is placed in gear, the Brake
Warning Light will flash. If vehicle speed is
detected, a chime will sound to alert the driver.
Fully release the parking brake before
attempting to move the vehicle.
This light only shows that the parking brake is
applied. It does not show the degree of brake
application.
CAUTION!
Never use Non-Detergent Oil or Straight Mineral
Oil in the engine or damage may result.

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STARTING AND OPERATING153
(Continued)
When parking on a hill, it is important to turn the
front wheels toward the curb on a downhill grade
and away from the curb on an uphill grade. For
vehicles equipped with an automatic transmission,
apply the parking brake before placing the gear
selector in PARK, otherwise the load on the
transmission locking mechanism may make it
difficult to move the gear selector out of PARK.
MANUAL TRANSMISSION — IF EQUIPPED
WARNING!
Never use the PARK position on an automatic
transmission as a substitute for the parking
brake. Always apply the parking brake fully
when parked to guard against vehicle move-
ment and possible injury or damage.
When exiting the vehicle, always remove the
key fob from the vehicle and lock your vehicle.
Never leave children alone in a vehicle, or with
access to an unlocked vehicle. Allowing chil
-
dren to be in a vehicle unattended is
dangerous for a number of reasons. A child or
others could be seriously or fatally injured.
Children should be warned not to touch the
parking brake, brake pedal or the gear
selector.
Do not leave the key fob in or near the vehicle,
or in a location accessible to children. A child
could operate power windows, other controls,
or move the vehicle.
Be sure the parking brake is fully disengaged
before driving; failure to do so can lead to
brake failure and a collision.
Always fully apply the parking brake when
leaving your vehicle or it may roll and cause
damage or injury. Also, be certain to leave an
automatic transmission in PARK, a manual
transmission in REVERSE or FIRST gear.
Failure to do so may cause the vehicle to roll
and cause damage or injury.
CAUTION!
If the Brake Warning Light remains on with the
parking brake released, a brake system
malfunction is indicated. Have the brake system
serviced by an authorized dealer immediately.
WARNING!
WARNING!
You or others could be injured if you leave the
vehicle unattended without having the parking
brake fully applied. The parking brake should
always be applied when the driver is not in the
vehicle, especially on an incline.
CAUTION!
Never drive with your foot resting on or
partially pressing the clutch pedal. Never
attempt to hold the vehicle on a hill with the
clutch pedal partially engaged. Operating
vehicle in this manner may cause the clutch to
overheat and cause permanent damage to
the clutch. If you continue to operate the
vehicle in this manner, the “CLUTCH HOT”
message or Transmission Temperature
Warning Light will be displayed in the instru -
ment cluster. For more information
Ú page 132.
Do not drive with your hand resting on the gear
selector as the force exerted, even if slight,
could lead over time to premature wear of the
gearbox internal components.
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154STARTING AND OPERATING
NOTE:During cold weather, you may experience
increased effort in shifting until the transmission
fluid warms up. This is normal.

Manual Transmission Shifter
To shift the gears, fully press the clutch pedal and
place the gear selector into the desired gear
position (the diagram for the engagement of the
gears is displayed on the handle of the selector).
The gear position will be displayed in the
instrument cluster.
To engage REVERSE gear from the NEUTRAL
position, lift the REVERSE ring, located below the
knob and move the gear selector all the way left
and then forward.
SHIFTING
Fully press the clutch pedal before shifting gears.
As you release the clutch pedal, lightly press the
accelerator pedal.
You should always use FIRST gear when starting
from a standing position.
NOTE:A certain amount of noise from the transmission is
normal. This noise can be most noticeable when
the vehicle is idling in NEUTRAL with the clutch
engaged (clutch pedal released), but it may also be
heard when driving. The noise may also be more
noticeable when the transmission is warm. This
noise is normal and is not an indication of a
problem with your clutch or transmission.
Recommended Vehicle Shift Speeds
To utilize your manual transmission efficiently for
both fuel economy and performance, it should be
upshifted as listed in the recommended shift
speed chart. Shift at the vehicle speeds listed for
acceleration. When heavily loaded or pulling a
trailer, these recommended up shift speeds may
not apply.
NOTE:Vehicle speeds shown in the chart above are for 2H and 4H only. Vehicle speeds in 4L would be significantly less.
Manual Transmission Shift Speeds in MPH (KM/H)
Engine
Speeds 1 to 22 to 33 to 44 to 55 to 6
3.6L Accel.
15 (24) 24 (39)50 (80)65 (104) 70 (112)
Cruise 10 (16) 19 (31)40 (64)55 (88)65 (105)

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