2023 JEEP WRANGLER ECU

IN CASE OF EMERGENCY301
MANUAL PARK RELEASE
In order to move the vehicle in cases where the
transmission will not shift out of PARK (P) (such as a
depleted battery), a Manual Park Release is available. See the following steps to use the Manual Park Release:

1. Firmly apply the parking brake.

2. Using a small screwdriver or similar tool, remove the
manual park release cover located in front of the gear
selector, to access the release tether strap.

Manual Park Release Cover

3. Fish the tether strap up through the opening in the console base.

Tether Strap

4. Press and maintain firm pressure on the brake pedal.
5. Pull the tether strap up until the release lever locks into place in the vertical position. The vehicle is now
out of PARK (P) and can be moved. Release the
parking brake only when the vehicle is securely
connected to a tow vehicle.

Vertical Released Position

CAUTION!
Driving with a hot cooling system could damage your
vehicle. If the temperature gauge reads “H,” pull over
and stop the vehicle. Idle the vehicle with the air condi -
tioner turned off until the pointer drops back into the
normal range. If the pointer remains on the “H” and you
hear continuous chimes, turn the engine off immedi -
ately and call for service.
WARNING!
Always secure your vehicle by fully applying the parking
brake before activating the Manual Park Release. In
addition, you should be seated in the driver’s seat with
your foot firmly on the brake pedal when activating the
Manual Park Release. Activating the Manual Park
Release will allow your vehicle to roll away if it is not
secured by the parking brake, or by proper connection
to a tow vehicle. Activating the Manual Park Release on
an unsecured vehicle could lead to serious injury or
death for those in or around the vehicle.
7

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IN CASE OF EMERGENCY303
TOWING A DISABLED VEHICLE
This section describes procedures for towing a disabled vehicle using a commercial towing service.
If the transmission and drivetrain are operable, disabled 4x4 vehicles may also be towed as described
Úpage 176.
Proper towing or lifting equipment is required to prevent
damage to your vehicle. Use only tow bars and other
equipment designed for this purpose, following equipment
manufacturer’s instructions. Use of safety chains is
mandatory. Attach a tow bar or other towing device to
main structural members of the vehicle, not to fascia/
bumpers or associated brackets. State and local laws
regarding vehicles under tow must be observed.
If you must use the accessories (wipers, defrosters, etc.)
while being towed, the ignition must be in the ON/RUN
position, not the ACC position.
If the vehicle's battery is discharged, instructions on
shifting the automatic transmission out of PARK (P) in
order to move the vehicle
Úpage 301.
FOUR–WHEEL DRIVE MODELS
FCA US LLC recommends towing with all wheels OFF the
ground. Acceptable methods are to tow the vehicle on a
flatbed or with one end of the vehicle raised and the
opposite end on a towing dolly.
If flatbed equipment is not available and the transfer case
is operable, the vehicle may be towed (in the forward
direction, with ALL wheels on the ground), IF the transfer
case is in NEUTRAL (N) and the transmission is in PARK (P)
(for automatic transmissions) or in gear NOT in NEUTRAL ,
for manual transmissions)
Úpage 176.
Towing Condition
Wheels OFF The Ground 4WD MODELS
Flat Tow NONE
Automatic Transmission in PARK (P)
 Manual Transmission in gear ( NOT in NEUTRAL)
 Transfer Case in NEUTRAL (N)
 Tow in Forward direction
Wheel Lift Or Dolly Tow Front
NOT ALLOWED
Rear NOT ALLOWED
Flatbed ALLBEST METHOD
NOTE:When towing your vehicle, always follow applicable state and provincial laws. Contact state and provincial Highway Safety offices for additional details.
CAUTION!
Do not use sling type equipment when towing.
Vehicle damage may occur.
 When securing the vehicle to a flatbed truck, do not
attach to front or rear suspension components.
Damage to your vehicle may result from improper
towing.
 If the vehicle being towed requires steering, the igni -
tion switch must be in the ACC or ON/RUN mode, not
in the OFF mode.
7

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SERVICING AND MAINTENANCE325
Refrigerant Recovery And Recycling —
R–1234yf
R–1234yf Air Conditioning Refrigerant is a Hydrofluo -
roolefin (HFO) that is endorsed by the Environmental
Protection Agency and is an ozone-friendly substance with
a low global-warming potential. The manufacturer
recommends that air conditioning service be performed by
an authorized dealer using recovery and recycling
equipment.
NOTE:Use only the manufacturer approved A/C system PAG
compressor oil, and refrigerants.
Cabin Air Filter
The cabin air filter is located in the fresh air inlet behind
the glove compartment. Perform the following procedure
to replace the filter:

1. Open the glove compartment and remove all contents.

2. Push up on the glove compartment travel stop and lower the door.

Glove Compartment Travel Stop

3. Pivot the glove compartment downward.
4. Disengage the two retaining tabs that secure the air filter access door to the HVAC housing.

Air Filter Retaining Tabs

5. Remove the air filter from the HVAC air inlet housing. Pull the filter elements out pinching them to the right
for clearance.

Air Filter

6. Install the cabin air filter with the air filter position indicators pointing in the same direction as removal.
7. Close cabin air filter access door and secure retaining tabs.WARNING!
Do not remove the cabin air filter while the vehicle is
running, or while the ignition is in the ACC or ON/RUN
mode. With the cabin air filter removed and the blower
operating, the blower can contact hands and may
propel dirt and debris into your eyes, resulting in
personal injury.
CAUTION!
The cabin air filter is identified with an arrow to indicate
airflow direction through the filter. Failure to properly
install the filter will result in the need to replace it more
often.
8

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332SERVICING AND MAINTENANCE
FRONT/REAR AXLE FLUID
For normal service, periodic fluid level checks are not
required. When the vehicle is serviced for other reasons
the exterior surfaces of the axle assembly should be
inspected. If gear oil leakage is suspected inspect the fluid
level.
Fluid Level Check
Lubricant should be approximately 1/8 inch (3 mm) below
the bottom edge of the oil fill hole.
NOTE:Make sure that the vehicle is level and supported by the
axles.
Adding Fluid
Add lubricant only at the fill hole and only to the level
specified above.
Selection Of Lubricant
Use only manufacturer recommended fluid Úpage 376.
TRANSFER CASE
Fluid Level Check
The fluid level should be to the bottom edge of the fill hole
when the vehicle is in a level position.

Transfer Case

Drain And Refill
For the proper maintenance intervals Úpage 307.
Selection Of Lubricant
Use only the manufacturer recommended fluid Úpage 376.
MANUAL TRANSMISSION — IF EQUIPPED
Fluid Level Check
Check the fluid level by removing the fill plug. The fluid
level should be between the bottom of the fill hole and a
point not more than 3/16 of an inch (4.76 mm) below the
bottom of the hole.
Add fluid, if necessary, to maintain the proper level.
Frequency Of Fluid Change
Under normal operating conditions, the fluid installed at
the factory will give satisfactory lubrication for the life of
the vehicle. If the fluid becomes contaminated with water,
it should be changed immediately. Otherwise, change the
fluid as recommended in the Maintenance Plan. Refer to
the Maintenance Plan for the proper maintenance
intervals
Úpage 307.
Selection Of Lubricant
Use only the manufacturer recommended manual
transmission fluid Úpage 376.

To avoid contamination from foreign matter or mois -
ture, use only new brake fluid or fluid that has been
in a tightly closed container. Keep the master
cylinder reservoir cap secured at all times. Brake
fluid in an open container absorbs moisture from the
air resulting in a lower boiling point. This may cause
it to boil unexpectedly during hard or prolonged
braking, resulting in sudden brake failure. This could
result in a collision.
 Overfilling the brake fluid reservoir can result in
spilling brake fluid on hot engine parts, causing the
brake fluid to catch fire. Brake fluid can also damage
painted and vinyl surfaces, care should be taken to
avoid its contact with these surfaces.
 Do not allow petroleum-based fluid to contaminate
the brake fluid. Brake seal components could be
damaged, causing partial or complete brake failure.
This could result in a collision.
WARNING!
1 — Fill hole
2 — Drain hole

23_JL_OM_EN_USC_t.book Page 332

SERVICING AND MAINTENANCE337
F03 –5 Amp TanIntelligent Battery Sensor (IBS)
F04 –20 Amp Yellow Fuel Pump MTR/FPCM
25 Amp Clear Fuel Pmp (6.4) *
F05 –5 Amp TanSecurity Gateway
F06 ––Spare *
F07 –15 Amp BlueLTR Coolant Pump *
F08 –15 Amp BlueTCM-8HP CYGNUS
F09 ––Spare *
F10 –15 Amp BlueKIN / RF HUB / ESCL
F11 –10 Amp RedUCI Port (USB & AUX)
F12 –25 Amp ClearHIFI Amplifier
F13 ––Spare *
F14 ––Spare *
F15 –15 Amp BlueIPC / Switch Bank-HD Elec
F16 ––Spare *
F17 ––Spare *
F18 –10 Amp RedAir Conditioning Clutch (AC CLUTCH)
F19 ––Spare *
F20 30 Amp Pink –Central Body Controller (CBC) 1-INTERIOR LIGHTS
F21 –20 Amp Yellow REAR WIPER
F22 –10 Amp RedEngine Control Module (ECM)/Powertrain Control Module (PCM)/Motor
Generator Unit (MGU) WAKE UP/Power Pack Unit (PPU) WAKE UP
F23 –10 Amp RedECM / PCM
F24 ––Spare *
Cavity Cartridge Fuse Micro Fuse Description

* If Equipped
8

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338SERVICING AND MAINTENANCE
F25 –10 Amp RedModule Shift By Wire (MOD_SBW)
F26 40 Amp Green –Central Body Controller (CBC) 2-EXTERIOR LIGHTS #1
F27 30 Amp Pink –Front Wipers
F28 40 Amp Green –Central Body Controller (CBC) 3-POWER LOCKS
F29 40 Amp Green –Central Body Controller (CBC) 4-EXTERIOR LIGHTS #2
F30 ––Spare *
F31 –10 Amp RedDIAGNOSTIC PORT
F32 –10 Amp RedHeating Ventilation Air Conditioning Mod (HVAC CTRL MOD)/Steering
Column Lock (SCL)/Occupant Classification Module (OCM)/Driver
Presence Detection Module (DPDM)
F33 –10 Amp RedParkTronics System (PTS)/Infrared Camera Module (IRCM)/Airbag
Disable Lamps (AIRBAG DISABLE LMPS)
F34 –10 Amp RedElectronic Stability Control (ESC)/Electric Hydraulic Power Steering
(EHPS)/Smart Bar Control Module (SBCM) WAKE UP
F35 30 Amp Pink –BRAKE VAC PMP*
F36 30 Amp Pink –TRAILER TOW ELEC BRK MOD*
F37 30 Amp Pink –TRAILER TOW CONN 7W*
F38 20 Amp Blue –Engine Control Module (ECM)
F39 –15 Amp BlueMGU Coolant Pump (3.6)*
F40 –15 Amp BlueDriveTrain Control Module (DTCM)/Axle Lock (AXLE LOC) FT_RR
F41 –15 Amp BlueInstrument Cluster (IC)/Security GateWay (SGW) WAKE UP
F42 –10 Amp RedPCR Ctrl Feed (ESS) *
F43 –20 Amp Yellow PWR OUTLET (CARGO) BATT
F44 –10 Amp RedInfraRed Camera (IRCAM) HEATERS
F45 –20 Amp Yellow PWR OUTLET (CARGO) IGN
CavityCartridge Fuse Micro Fuse Description

* If Equipped

23_JL_OM_EN_USC_t.book Page 338

SERVICING AND MAINTENANCE341
Customer can select to switch the Cargo Power Outlet from F43 battery fed power to this position F45 which is fed when the ignition in ON.F90
20 Amp Blue –TRAILER TOW PARK LMP*
F91 –20 Amp Yellow HORN
F92 40 Amp Green –HD ACCY #2*
F93 40 Amp Green –HD ACCY #1*
F94 ––Spare *
F95 ––Spare *
F96 –10 Amp RedPWR MIRROR SW
F97 –20 Amp Yellow RADIO/TBM
F98 –10 Amp RedSW BANK-HD ELEC/OFF ROAD
F99 ––Spare *
F100 30 Amp Pink –ESC-ECU & VALVES
F101 30 Amp Pink –DriveTrain Control Module (DTCM)
F102 –15 Amp BlueDUAL USB PORT
F103 –15 Amp BlueHD ACCY #3*
F104 –15 Amp BluePPU COOL PUMP*
F105 –10 Amp RedIntegrated Center Stack (ICS)/Heat Ventilation Air Conditioning (HVAC)
F106 50 Amp Red –ESC -PUMP MTR
F107 –20 Amp Yellow TRAILER TOW STOP/TURN LT*
F108 –15 Amp BlueHD ACCY #4*
F109 –20 Amp Yellow TRAILER TOW STOP/TURN RT*
F110 30 Amp Pink –POWER INVERTER
F111 20 Amp Blue –TRAILER TOW BACKUP*
Cavity Cartridge Fuse Micro Fuse Description

* If Equipped
8

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362SERVICING AND MAINTENANCE
(Continued)
Care Of Fabric Top Windows
Your vehicle's fabric top has pliable plastic windows which
can be scratched unless special care is taken by following
these directions:
Never use a dry cloth to remove dust. Instead, use a
microfiber towel or soft cotton cloth moistened with
cold or warm, clean water, and wipe across the
window, not up and down. Mopar® Jeep® Soft Glass
Window Cleaner or equivalent will safely clean all
plastic windows without scratching. It removes fine
scratches to improve visibility and provides UV protec -
tion to help prevent yellowing.
 When washing, never use hot water or anything
stronger than a mild soap. Never use solvents such as
alcohol or harsh cleaning agents. 
Always rinse thoroughly with cold water, then wipe with
a soft and slightly moist, clean cloth.
 When removing frost, snow or ice, never use a scraper
or de-icing chemicals. Use warm water only if you must
clean the window quickly.
 Debris (sand, mud/dirt, dust, or salt) from off-road
driving will have an impact on plastic retainer opera -
tion. Even normal on-road driving and vehicle washing
will eventually impact window plastic retainer opera -
tion. To maintain ease of use of the window plastic
retainers, each window plastic retainer should be
cleaned and lubricated regularly. Clean them with a
mild soap solution and a small brush. Cleaning prod -
ucts are available through an authorized dealer.
 Never paste stickers, gummed labels or any tape to the
windows. Adhesives are hard to remove and may
damage the windows.
INTERIORS
CARPET SAFETY INFORMATION
Always use carpet designed to fit your vehicle. Only use
carpet that does not interfere with the operation of the
pedal assemblies. Only operate the vehicle when the
carpet is securely attached by the grommets so it cannot
slip out of position and interfere with the pedal assemblies
or impair safe operation of your vehicle in other ways.
CAUTION!
Failure to follow these cautions may cause interior
water damage, stains, or mildew of the top material:
Do not run a fabric top through an automatic car
wash. Window scratches and wax build-up may
result.
 It is recommended that the top be free of water prior
to opening it. Operating the top, opening a door or
lowering a window while the top is wet may allow
water to drip into the vehicle’s interior.
 Use care when washing the vehicle, water pressure
directed at the weather strip seals may cause water
to leak into the vehicle’s interior.
 Careless handling and storage of the removable roof
panels may damage the seals, causing water to leak
into the vehicle’s interior.
 The front panel(s) must be positioned properly to
ensure sealing. Improper installation can cause
water to leak into the vehicle’s interior.
CAUTION!
Avoid washing with rollers and/or brushes in washing
stations. Wash the vehicle only by hand using neutral
pH detergents; dry it with a wet chamois leather.
Abrasive products and/or polishes should not be
used for cleaning the car.
Bird droppings must be washed off immediately and
thoroughly as the acid they contain is particularly
aggressive.
 Avoid (if at all possible) parking the vehicle under
trees; remove vegetable resins immediately as, when
dried, it may only be possible to remove them with
abrasive products and/or polishes, which is highly
inadvisable as they could alter the typical opaque -
ness of the paint.
 Do not use pure windshield washer fluid for cleaning
the front windshield and rear window; dilute it to a
minimum of 50% water. Only use pure windshield
washer fluid when strictly necessary due to outside
temperature conditions.
CAUTION!

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