2023 JEEP WRANGLER battery

SERVICING AND MAINTENANCE317
CHECKING OIL LEVEL
To ensure proper engine lubrication, the engine oil must
be maintained at the correct level. Check the oil level at
regular intervals, such as every fuel stop. The best time to
check the engine oil level is about five minutes after a fully
warmed up engine is shut off.
Checking the oil while the vehicle is on level ground will
improve the accuracy of the oil level readings.
There are four possible dipstick types:
Crosshatched zone.
 Crosshatched zone marked SAFE.
 Crosshatched zone marked with MIN at the low end of
the range and MAX at the high end of the range.
 Crosshatched zone marked with dimples at the MIN
and the MAX ends of the range.
NOTE:Always maintain the oil level within the crosshatch
markings on the dipstick.
NOTE:Use care when filling under hood fluids such as engine oil,
washer fluid, antifreeze, etc., to minimize spillage onto the
top of the engine. Any excess fluid that is spilled onto the
top of the engine should be removed using compressed
air or an absorbent cloth.
Adding 1 qt (1 L) of oil when the reading is at the low end
of the dipstick range will raise the oil level to the high end
of the range marking.
ADDING WASHER FLUID
The fluid reservoir for the windshield washers and the rear
window washer (if equipped) is shared. The fluid reservoir
is located in the engine compartment. Be sure to check
the fluid level at regular intervals. Fill the reservoir with
windshield washer solvent only (not radiator antifreeze).
When refilling the washer fluid reservoir, take some
washer fluid and apply it to a cloth or towel and wipe clean
the wiper blades; this will help blade performance.
To prevent freeze-up of your windshield washer system in
cold weather, select a solution or mixture that meets or
exceeds the temperature range of your climate. This rating
information can be found on most washer fluid containers.
NOTE:Use care when filling under hood fluids such as engine oil,
washer fluid, antifreeze, etc., to minimize spillage onto the
top of the engine. Any excess fluid that is spilled onto the
top of the engine should be removed using compressed
air or an absorbent cloth.
MAINTENANCE-FREE BATTERY
Your vehicle is equipped with a maintenance-free battery.
You will never have to add water, and periodic
maintenance is not required.
CAUTION!
Overfilling or underfilling the crankcase will cause
aeration or loss of oil pressure. This could damage your
engine.
WARNING!
Commercial windshield washer solvents are flammable.
They could ignite and burn you. Care must be exercised
when filling or working around the washer solution.
WARNING!
Battery fluid is a corrosive acid solution and can burn
or even blind you. Do not allow battery fluid to
contact your eyes, skin, or clothing. Do not lean over
a battery when attaching clamps. If acid splashes in
eyes or on skin, flush the area immediately with large
amounts of water
Úpage 298.
 Battery gas is flammable and explosive. Keep flame
or sparks away from the battery. Do not use a
booster battery or any other booster source with an
output greater than 12 Volts. Do not allow cable
clamps to touch each other.
 Battery posts, terminals, and related accessories
contain lead and lead compounds. Wash hands after
handling.
 Vehicles with the Stop/Start system will be equipped
with two batteries. Both the main and the supple -
mental batteries must be disconnected to
completely de-energize the 12 Volt electrical system.
 Serious injury or death could result if you do not
disconnect both batteries. To learn how to properly
disconnect, see an authorized dealer.
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318SERVICING AND MAINTENANCE
PRESSURE WASHING
Cleaning the engine compartment with a high pressure
washer is not recommended.
VEHICLE MAINTENANCE
An authorized dealer has the qualified service personnel,
special tools, and equipment to perform all service
operations in an expert manner. Service Manuals are
available which include detailed service information for
your vehicle. Refer to these Service Manuals before
attempting any procedure yourself.
NOTE:Intentional tampering with emissions control systems may
void your warranty and could result in civil penalties being
assessed against you.
ENGINE OIL
Engine Oil Selection
For engine oil selection Úpage 374.
American Petroleum Institute (API)
Approved Engine Oil
These symbols mean that the oil has been certified by the
API. The manufacturer only recommends API trademark
oils.
The API Starburst trademark certifies 0W-20,
0W-30 and 5W-30 engine oils.
The API Donut trademark certifies 0W-40 and
5W-40 engine oil.
Synthetic Engine Oils
Your engine was designed for synthetic engine oils, only
use synthetic API approved engine oils.
Synthetic engine oils which do not have both the correct
API trademark and the correct SAE viscosity grade
numbers should not be used.
CAUTION!
It is essential when replacing the cables on the
battery that the positive cable is attached to the posi -
tive post and the negative cable is attached to the
negative post. Battery posts are marked positive (+)
and negative (-) and are identified on the battery
case. Cable clamps should be tight on the terminal
posts and free of corrosion.
 If a “fast charger” is used while the battery is in the
vehicle, disconnect both vehicle battery cables
before connecting the charger to the battery. Do not
use a “fast charger” to provide starting voltage.
 Vehicles with the Stop/Start system will be equipped
with two batteries. Both the main and the supple -
mental batteries must be disconnected to
completely de-energize the 12 Volt electrical system.
 If the negative battery cables are not isolated prop -
erly it can cause a potential power spike or surge in
the system, resulting in damage to essential elec -
trical components.
CAUTION!
Precautions have been taken to safeguard all parts and
connections however, the pressures generated by these
machines is such that complete protection against
water ingress cannot be guaranteed.
WARNING!
You can be badly injured working on or around a motor
vehicle. Only do service work for which you have the
knowledge and the proper equipment. If you have any
doubt about your ability to perform a service job, take
your vehicle to a competent mechanic.
CAUTION!
Do not use chemical flushes in your engine oil as the
chemicals can damage your engine. Such damage is
not covered by the New Vehicle Limited Warranty.

23_JL_OM_EN_USC_t.book Page 318

SERVICING AND MAINTENANCE329
Coolant Checks
Check the engine, battery (if equipped), intercooler (if
equipped), and Motor Generator Unit (MGU) (if equipped)
coolant (antifreeze) protection every 12 months (before
the onset of freezing weather, where applicable). If the
engine, battery (if equipped), intercooler (if equipped), and
MGU (if equipped) coolant is dirty or rusty in appearance,
the system should be drained, flushed and refilled with
fresh OAT coolant (conforming to MS.90032) by an
authorized dealer. Check the front of the A/C condenser (if
equipped) or radiator for any accumulation of bugs,
leaves, etc. If dirty, clean by gently spraying water from a
garden hose vertically down the face of the A/C condenser
(if equipped) or the back of the radiator core.
Check the engine, battery (if equipped), intercooler (if
equipped), and MGU (if equipped) cooling system hoses
for brittle rubber, cracking, tears, cuts, and tightness of
the connection at the coolant recovery bottle and radiator.
Inspect the entire system for leaks. DO NOT REMOVE THE
COOLANT PRESSURE CAP WHEN THE COOLING SYSTEM IS
HOT.
Cooling System — Drain, Flush And Refill
NOTE:Some vehicles require special tools to add coolant
properly. Failure to fill these systems properly could lead to severe internal engine damage. If any coolant is needed
to be added to the system please contact an authorized
dealer.
If the engine coolant (antifreeze) is dirty or contains visible
sediment, have an authorized dealer clean and flush with
OAT coolant (conforming to MS.90032).
For the proper maintenance intervals, see
Úpage 307 for
gasoline engines or Úpage 311 for diesel engines.
Selection Of Coolant
For further information Úpage 374.
NOTE:
 Mixing of engine coolant (antifreeze) other than speci-
fied Organic Additive Technology (OAT) engine coolant,
may result in engine damage and may decrease corro -
sion protection. OAT engine coolant is different and
should not be mixed with Hybrid Organic Additive Tech -
nology (HOAT) engine coolant or any “globally compat -
ible” coolant. If a non-OAT engine coolant is introduced
into the cooling system in an emergency, the cooling
system will need to be drained, flushed, and refilled
with fresh OAT coolant (conforming to MS.90032), by
an authorized dealer as soon as possible.
 Do not use water alone or alcohol-based engine
coolant (antifreeze) products. Do not use additional
rust inhibitors or anti-rust products, as they may not be
compatible with the radiator engine coolant and may
plug the radiator.
 This vehicle has not been designed for use with
propylene glycol-based engine coolant. Use of
propylene glycol-based engine coolant is not recom -
mended. 
Some vehicles require special tools to add coolant
properly. Failure to fill these systems properly could
lead to severe internal engine damage. If any coolant is
needed to be added to the system please contact an
authorized dealer.
Adding Coolant

Your vehicle has been built with an improved engine coolant
(OAT coolant conforming to MS.90032) that allows
extended maintenance intervals. This engine coolant
(antifreeze) can be used up to 10 years or 150,000 miles
(240,000 km) before replacement. To prevent reducing this
extended maintenance period, it is important to use the
same engine coolant (OAT coolant conforming to
MS.90032) throughout the life of your vehicle.

Please review these recommendations for using Organic
Additive Technology (OAT) engine coolant that meets the
requirements of the manufacturer Material Standard
MS.90032. When adding engine coolant (antifreeze):
We recommend using Mopar® Antifreeze/Coolant
10 Year/150,000 Mile (240,000 km) Formula OAT
(Organic Additive Technology) that meets the require -
ments of the manufacturer Material Standard
MS.90032.
 Mix a minimum solution of 50% OAT engine coolant
that meets the requirements of the manufacturer
Material Standard MS.90032 and distilled water. Use
higher concentrations (not to exceed 70%) if tempera -
tures below −34°F (−37°C) are anticipated. Please
contact an authorized dealer for assistance.
 Use only high purity water such as distilled or deionized
water when mixing the water/engine coolant solution.
The use of lower quality water will reduce the amount
of corrosion protection in the engine cooling system.

When working near the radiator cooling fan, discon -
nect the fan motor lead or turn the ignition to the OFF
mode. The fan is temperature controlled and can
start at any time the ignition is in the ON mode.
WARNING!
8

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334SERVICING AND MAINTENANCE
The fuses protect electrical systems against excessive
current.
When a device does not work, you must check the fuse
element inside the blade fuse for a break/melt.
Also, please be aware that using power outlets for
extended periods of time with the engine off may result in
vehicle battery discharge.

Blade Fuses

Power Distribution Center (PDC)
The Power Distribution Center is located in the engine
compartment near the battery. This center contains
cartridge fuses, mini fuses, and relays. The PDC top cover
is labeled with each serviceable fuse/relay location,
function, and size.

If a general protection fuse for safety systems (air
bag system, braking system), power unit systems
(engine system, gearbox system) or steering system
blows, contact an authorized dealer.WARNING!
1 — Fuse Element
2 — Blade Fuse with a good/functional fuse element
3 — Blade fuse with a bad/not functional fuse element
(blown fuse)
CAUTION!
When installing the power distribution center cover, it is
important to ensure the cover is properly positioned
and fully latched. Failure to do so may allow water to get
into the power distribution center and possibly result in
an electrical system failure.

23_JL_OM_EN_USC_t.book Page 334

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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340SERVICING AND MAINTENANCE
F69 –5 Amp TanMotor Generator Unit MGU Belt Starter Generator (BSG)*
F70 –25 Amp ClearINJ/IGN COIL (GAS)/GLO PLUG MOD (DSL)
F71 ––Spare *
F72 –10 Amp RedHD ELEC ACC PKG*
F73 20 Amp Blue –PWR TOP LT
F74 20 Amp Blue –PWR TOP RT
F75 –10 Amp RedPower Pack Unit - Battery Pack Control Module & Auxiliary Power
Module (PPU-BPCM & APM) Belt Starter Generator (BSG)*
F76 –20 Amp Yellow ECM (GAS)/PCM (DSL)
F77 –10 Amp RedHEATED MIRRORS
F78 –10 Amp RedINTRUSION MOD/SIREN/INTRUSION SENSORS
F79 –20 Amp Yellow SMART BAR CTRL MOD
F80 –15 Amp Blue
Powertrain Control Module (PCM) / SOL 1,2 BLOCK SHIFT *
10 Amp Red Vapor Blocking Valve (BSG) *
F81 30 Amp Pink –Rear Defrost (EBL)
F82 30 Amp Pink –FUEL HTR*
F83 60 Amp Yellow –GLOW PLUG*
F84 30 Amp Pink –UREA HTR CTRL UNIT*
F85 –10 Amp RedPM SENSOR*
F86 30 Amp Pink –BRAKE VAC PMP 2*
F87 –10 Amp RedSUPPLY/PURGING PMP*
F88 20 Amp Blue –NOx SENSOR #1/ #2*
F89 –10 Amp RedSteering Column Control Module (SCCM)/ Cruise Control (CRUISE
CTL)/Digital TV (DTV) / EVIC / Airbag Disable Lamp
Cavity
Cartridge Fuse Micro Fuse Description

* If Equipped

23_JL_OM_EN_USC_t.book Page 340

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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360SERVICING AND MAINTENANCE
If you are storing your vehicle for more than three weeks,
we recommend that you take the following steps to
minimize the drain on your vehicle's battery:
Disconnect the negative cable from battery.
 If your vehicle is equipped with Stop/Start system then
disconnect both the main and supplemental negative
battery cables.
 Any time you store your vehicle or keep it out of service
(i.e., vacation) for two weeks or more, run the air condi -
tioning system at idle for about five minutes in the
fresh air and high blower setting. This will ensure
adequate system lubrication to minimize the possibility
of compressor damage when the system is started
again.
 If assistance is needed to disconnect the battery
system, see an authorized dealer.

Battery Cable Disconnect

NOTE:
You must isolate the supplemental battery connection
point, as well as the main battery terminal from the
post, as shown in the image, to fully de-energize both
batteries for storage. If assistance is needed to discon -
nect the battery system, see an authorized dealer.
 Do not disconnect the Intelligent Battery Sensor (IBS),
or your Stop/Start system may not function for up to 24
hours, due to the IBS being set into learn mode.
BODYWORK
PROTECTION FROM ATMOSPHERIC
A
GENTS
Vehicle body care requirements vary according to
geographic locations and usage. Chemicals that make
roads passable in snow and ice and those that are
sprayed on trees and road surfaces during other seasons
are highly corrosive to the metal in your vehicle. Outside
parking, which exposes your vehicle to airborne
contaminants, road surfaces on which the vehicle is
operated, extreme hot or cold weather and other extreme
conditions will have an adverse effect on paint, metal trim,
and underbody protection.
The following maintenance recommendations will enable
you to obtain maximum benefit from the corrosion
resistance built into your vehicle.
What Causes Corrosion?
Corrosion is the result of deterioration or removal of paint
and protective coatings from your vehicle.
The most common causes are:
 Road salt, dirt and moisture accumulation.
 Stone and gravel impact.
 Insects, tree sap and tar.
 Salt in the air near seacoast localities.
 Atmospheric fallout/industrial pollutants.
CAUTION!
If the negative battery cables are not isolated properly it
can cause a potential power spike or surge in the
system, resulting in damage to essential electrical
components.
1 — Supplemental Negative Battery Cable
2 — Main Negative Battery Cable
3 — Main Negative Battery Terminal
4 — Intelligent Battery Sensor (IBS)

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