Jeep Wrangler (2022 year). Manual in english

SERVICING AND MAINTENANCE

363

(Continued)

Fuel/Water Separator Filter

Within 10 minutes of vehicle shutdown, turn the

filter drain valve (located on the bottom of the filter

housing) counterclockwise to drain fuel/water;

allow the accumulated water to drain. Leave the

drain valve open until all water and contaminants

have been removed. When clear fuel is visible,

close the drain valve by turning it clockwise.
Upon proper draining of the water from fuel filter

assembly, the Water In Fuel Indicator Light will

remain illuminated for approximately 10 seconds.

If the water was drained while the engine was

running, the Water In Fuel Indicator Light may

remain on for approximately three minutes.

NOTE:

Care should be taken in disposing of used fluids

from your vehicle. Used fluids, indiscriminately

discarded, can present a problem to the envi

ronment. Contact an authorized dealer, service

station, or government agency for advice on recy

cling programs and for where used fluids and

filters can be properly disposed of in your area.
If more than two ounces or 60 ml of fuel have been

drained, follow the directions for Priming If The

Engine Has Run Out Of Fuel

page 364.

UEL

ILTER

EPLACEMENT

— D

IESEL

NGINE

NOTE:

Using a fuel filter that does not meet the manufac

turer’s filtration and water separating require

ments can severely impact fuel system life and reli

ability. We recommend you use Mopar® Fuel Filter.

Must meet 3 micron rating.

1. Ensure engine is turned off.
2. Remove the fuel filter protective cover to

access the fuel filter assembly.

Fuel Filter Assembly

1 — Water In Fuel Drain Valve

CAUTION!



Diesel fuel will damage blacktop paving

surfaces. Drain the filter into an appropriate

container.



Do not prefill the fuel filter when installing a

new fuel filter. There is a possibility debris

could be introduced into the fuel filter during

this action. It is best to install the filter dry and

allow the in-tank lift pump to prime the fuel

system.

1 — Retainers
2 — Fuel Filter Protective Cover

CAUTION!

364

SERVICING AND MAINTENANCE

3. Place drain pan under the fuel filter assembly.
4. Open the water drain valve, and let any

accumulated water and fuel drain.

5. Close the water drain valve.

Fuel Filter Assembly

6. Wipe clean the underside of the filter housing

to prevent contamination from entering fuel

system during service.

7. Remove the fuel filter cap and filter from the

housing using a socket. Rotate counter

clockwise for removal.

Fuel Filter Assembly

8. Remove the used fuel filter cartridge from the

cap and dispose of according to your local

regulations.

9. Wipe clean the sealing surfaces of the cap and

housing.

10. Lubricate o-ring on the cap with clean engine

oil.

11. Install the new fuel filter cartridge onto the

cap.

12. Insert the cap and filter into the housing with

clockwise rotation, use a socket to tighten.

13. Push the ignition switch twice without your foot

on the brake to place vehicle in RUN position.

This will activate the in tank fuel pump for

approximately 30 seconds. Repeat this

process twice to prime the fuel system. Start

the engine using the Normal Starting

procedure. After engine start, verify the fuel

filter cap does not leak.

RIMING

NGINE

UEL

— D

IESEL

NGINE

1. Add a substantial amount of fuel to the tank,

approximately 2 to 5 gal (8L to 19L).

2. Push ignition switch twice without your foot on

brake to put vehicle in RUN position. This will

activate the in tank fuel pump for approxi

mately 30 seconds. Repeat this process twice

to prime the fuel system.

1 — Water Drain Valve

1 — Fuel Filter Cap
2 — Socket Adapter

CAUTION!

Take care when handling the new fuel filter to

prevent contamination from entering the fuel

system.

WARNING!

Do not open the high pressure fuel system with

the engine running. Engine operation causes

high fuel pressure. High pressure fuel spray can

cause serious injury or death.

SERVICING AND MAINTENANCE

365

3. Start the engine using the Normal Starting

procedure

page 143.

NOTE:

The engine may run rough until the air is forced

from all the fuel lines.

NOTE:



Use of biodiesel mixture in excess of 20% can

negatively impact the fuel filter's ability to sepa

rate water from the fuel, resulting in high pres

sure fuel system corrosion or damage.



In addition, commercially available fuel addi

tives are not necessary for the proper operation

of your diesel engine.



For extreme cold conditions, "Mopar® Premium

Diesel Fuel Treatment" is recommended to

assist with cold starting.

NTERVENTION

EGENERATION

TRATEGY

— M

ESSAGE

ROCESS

LOW

This engine meets all required diesel engine

emissions standards. To achieve these emissions

standards, your vehicle is equipped with a

state-of-the-art engine and exhaust system. These

systems are seamlessly integrated into your

vehicle and managed by the Powertrain Control

Module (PCM). The PCM manages engine

combustion to allow the exhaust system’s catalyst

to trap and burn Particulate Matter (PM)

pollutants, with no input or interaction on your part.
Additionally, your vehicle has the ability to alert you

to additional maintenance required on your vehicle

or engine.

Refer to Instrument Cluster Display for further

information

page 120.

IESEL

XHAUST

LUID

Diesel Exhaust Fluid (DEF) sometimes known

simply by the name of its active component,

UREA—is a key component of Selective Catalytic

Reduction (SCR) systems, which help diesel

vehicles meet stringent emission regulations. DEF

is a liquid reducing agent that reacts with engine

exhaust in the presence of a catalyst to convert

smog-forming Nitrogen Oxides (NOx) into harmless

nitrogen and water vapor.
For further information

page 424.

CAUTION!

The starter motor will engage for approximately

30 seconds at a time. Allow two minutes

between cranking intervals.

WARNING!

Do not use alcohol or gasoline as a fuel blending

agent. They can be unstable under certain

conditions and be hazardous or explosive when

mixed with diesel fuel.

CAUTION!

Due to lack of lubricants in alcohol or gasoline,

the use of these fuels can cause damage to the

fuel system.

WARNING!

A hot exhaust system can start a fire if you park

over materials that can burn. Such materials

might be grass or leaves coming into contact

with your exhaust system. Do not park or oper

ate your vehicle in areas where your exhaust sys

tem can contact anything that can burn.

366

SERVICING AND MAINTENANCE

(Continued)

CCESSORY

RIVE

ELT

NSPECTION

When inspecting accessory drive belts, small

cracks that run across the ribbed surface of the

belt, from rib to rib, are considered normal. These

are not a reason to replace a belt. However, cracks

running along a rib (not across) are not normal. Any

belt with cracks running along a rib must be

replaced. Also have the belt replaced if it has

excessive wear, frayed cords, or severe glazing.

Accessory Belt (Serpentine Belt)

Conditions that would require replacement:



Rib chunking (one or more ribs has separated

from belt body)



Rib or belt wear



Longitudinal belt cracking (cracks between two

ribs)



Belt slips



“Groove jumping" (belt does not maintain

correct position on pulley)



Belt broken



Noise (objectionable squeal, squeak, or rumble

is heard or felt while drive belt is in operation)

NOTE:

Identify and correct problem before new belt is

installed.

Some conditions can be caused by a faulty

component such as a belt pulley. Belt pulleys

should be carefully inspected for damage and

proper alignment.
Belt replacement on some models requires the

use of special tools, we recommend having your

vehicle serviced at an authorized dealer.

ONDITIONER

AINTENANCE

For best possible performance, your air conditioner

should be checked and serviced by an authorized

dealer at the start of each warm season. This

service should include cleaning of the condenser

fins and a performance test. Drive belt tension

should also be checked at this time.

WARNING!



Do not attempt to inspect an accessory drive

belt with vehicle running.



When working near the radiator cooling fan,

disconnect the fan motor lead. The fan is

temperature controlled and can start at any

time regardless of ignition mode. You could be

injured by the moving fan blades.



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 equip

ment. If you have any doubt about your ability

to perform a service job, take your vehicle to a

competent mechanic.

WARNING!



Use only refrigerants and compressor lubri

cants approved by the manufacturer for your

air conditioning system. Some unapproved

refrigerants are flammable and can explode,

injuring you. Other unapproved refrigerants or

lubricants can cause the system to fail,

requiring costly repairs. Refer to Warranty

Information Book, located in your owner’s

information kit, for further warranty informa

tion.

SERVICING AND MAINTENANCE

367

Refrigerant Recovery And Recycling —

R–1234yf

R–1234yf Air Conditioning Refrigerant is a

Hydrofluoroolefin (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



The air conditioning system contains refrig

erant under high pressure. To avoid risk of

personal injury or damage to the system,

adding refrigerant or any repair requiring lines

to be disconnected should be done by an

experienced technician.

CAUTION!

Do not use chemical flushes in your air condition

ing system as the chemicals can damage your air

conditioning components. Such damage is not

covered by the New Vehicle Limited Warranty.

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.

368

SERVICING AND MAINTENANCE

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.

8. Rotate the glove compartment door back into

position ensuring you have properly engaged

the travel damper.

Travel Dampener

For the proper maintenance intervals, see

page 348 for gasoline engines or

page 352

for diesel engines.

ODY

UBRICATION

Locks and all body pivot points, including such

items as seat tracks, door hinge pivot points and

rollers, liftgate, tailgate, decklid, sliding doors and

hood hinges, should be lubricated periodically with

a lithium based grease, such as Mopar® Spray

White Lube to ensure quiet, easy operation and to

protect against rust and wear. Prior to the

application of any lubricant, the parts concerned

should be wiped clean to remove dust and grit;

after lubricating excess oil and grease should be

removed. Particular attention should also be given

to hood latching components to ensure proper

function. When performing other underhood

services, the hood latch release mechanism, and

safety catch should be cleaned and lubricated.
The external lock cylinders should be lubricated

twice a year, preferably in the Fall and Spring.

Apply a small amount of a high quality lubricant,

such as Mopar® Lock Cylinder Lubricant directly

into the lock cylinder.

INDSHIELD

IPER

LADES

Clean the rubber edges of the wiper blades and the

windshield periodically with a sponge or soft cloth

and a mild nonabrasive cleaner. This will remove

accumulations of salt or road film.

Operation of the wipers on dry glass for long

periods may cause deterioration of the wiper

blades. Always use washer fluid when using the

wipers to remove salt or dirt from a dry windshield.
Avoid using the wiper blades to remove frost or ice

from the windshield. Keep the blade rubber out of

contact with petroleum products such as engine

oil, gasoline, etc.

NOTE:

Life expectancy of wiper blades varies depending

on geographical area and frequency of use. Poor

performance of blades may be present with chat

tering, marks, water lines or wet spots. If any of

these conditions are present, clean the wiper

blades or replace as necessary.
The wiper blades and wiper arms should be

inspected periodically, not just when wiper

performance problems are experienced. This

inspection should include the following points:



Wear or uneven edges



Foreign material



Hardening or cracking



Deformation or fatigue

If a wiper blade or wiper arm is damaged, replace

the affected wiper arm or blade with a new unit. Do

not attempt to repair a wiper arm or blade that is

damaged.

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.

1 — Travel Dampener Housing
2 — Travel Dampener Rod

SERVICING AND MAINTENANCE

369

Wiper Blade Removal/Installation

1. Lift the wiper arm to raise the wiper blade off

of the glass, until the wiper arm is in the full

up position.

Wiper Blade With Release Tab In Locked Position

2. To disengage the wiper blade from the wiper

arm, push the release tab on the wiper blade

and while holding the wiper arm with one

hand, slide the wiper blade down towards the

base of the wiper arm.

Wiper Blade With Release Tab In Unlocked Position

3. With the wiper blade disengaged, remove the

wiper blade from the wiper arm.

4. Gently lower the wiper arm onto the glass.

Installing The Front Wipers
1. Lift the wiper arm off of the glass, until the

wiper arm is in the full up position.

2. Position the wiper blade near the hook on the

tip of the wiper arm.

3. Slide the wiper blade up into the hook on the

wiper arm, latch engagement will be

accompanied by an audible click.

4. Gently lower the wiper blade onto the glass.

Rear Wiper Blade Removal/Installation

1. Open swing gate to access the wiper arm.

Rear Wiper Assembly

CAUTION!

Do not allow the wiper arm to spring back

against the glass without the wiper blade in

place or the glass may be damaged.

1 — Wiper Blade
2 — Wiper Arm
3 — Release Tab

1 — Wiper Blade
2 — Wiper Arm J Hook
3 — J Hook Retainer

1 — Wiper Arm
2 — Wiper Blade

370

SERVICING AND MAINTENANCE

2. Lift wiper arm off of the glass and rotate wiper

blade outward to disengage the wiper blade

from the wiper arm.

Wiper Blade And Wiper Arm

3. Gently set the arm on the glass.

Wiper Blade Removed From Wiper Arm

Installing The Rear Wiper
1. Lift the wiper arm off of the glass.
2. Insert the wiper blade pivot pin into the

opening on the end of the wiper arm and rotate

the wiper in to place.

3. Place with wiper on the glass and close the tail

gate.

XHAUST

YSTEM

The best protection against carbon monoxide entry

into the vehicle body is a properly maintained

engine exhaust system.

If you notice a change in the sound of the exhaust

system; or if the exhaust fumes can be detected

inside the vehicle; or when the underside or rear of

the vehicle is damaged; have an authorized

technician inspect the complete exhaust system

and adjacent body areas for broken, damaged,

deteriorated, or mispositioned parts. Open seams

or loose connections could permit exhaust fumes

to seep into the passenger compartment. In

addition, have the exhaust system inspected each

time the vehicle is raised for lubrication or oil

change. Replace as required.

1 — Wiper Arm
2 — Wiper Blade

1 — Wiper Blade Pivot Pin
2 — Wiper Arm Receptacle

WARNING!



Exhaust gases can injure or kill. They contain

Carbon Monoxide (CO), which is colorless and

odorless. Breathing it can make you uncon

scious and can eventually poison you

page 327.



A hot exhaust system can start a fire if you

park over materials that can burn. Such mate

rials might be grass or leaves coming into

contact with your exhaust system. Do not park

or operate your vehicle in areas where your

exhaust system can contact anything that can

burn.

SERVICING AND MAINTENANCE

371

(Continued)

Under normal operating conditions, the catalytic

converter will not require maintenance. However, it

is important to keep the engine properly tuned to

ensure proper catalyst operation and prevent

possible catalyst damage.

NOTE:

Intentional tampering with emissions control

systems can result in civil penalties being

assessed against you.

In unusual situations involving grossly

malfunctioning engine operation, a scorching odor

may suggest severe and abnormal catalyst

overheating. If this occurs, stop the vehicle, turn off

the engine and allow it to cool. Service, including a

tune-up to manufacturer's specifications, should

be obtained immediately.
To minimize the possibility of catalytic converter

damage:



Do not interrupt the ignition when the transmis

sion is in gear and the vehicle is in motion.



Do not try to start the vehicle by pushing or

towing the vehicle.



Do not idle the engine with any ignition compo

nents disconnected or removed, such as when

diagnostic testing, or for prolonged periods

during very rough idle or malfunctioning oper

ating conditions.

OOLING

YSTEM

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.

CAUTION!



The catalytic converter requires the use of

unleaded fuel only. Leaded gasoline will

destroy the effectiveness of the catalyst as an

emissions control device and may seriously

reduce engine performance and cause

serious damage to the engine.



Damage to the catalytic converter can result if

your vehicle is not kept in proper operating

condition. In the event of engine malfunction,

particularly involving engine misfire or other

apparent loss of performance, have your

vehicle serviced promptly. Continued opera

tion of your vehicle with a severe malfunction

could cause the converter to overheat,

resulting in possible damage to the converter

and vehicle.

WARNING!



You or others can be badly burned by hot

engine coolant (antifreeze) or steam from your

radiator. If you see or hear steam coming from

under the hood, do not open the hood until the

radiator has had time to cool. Never open a

cooling system pressure cap when the radi

ator or coolant bottle is hot.



Keep hands, tools, clothing, and jewelry away

from the radiator cooling fan when the hood is

raised. The fan starts automatically and may

start at any time, whether the engine is

running or not.



When working near the radiator cooling fan,

disconnect the fan motor lead or turn the igni

tion to the OFF mode. The fan is temperature

controlled and can start at any time the igni

tion is in the ON mode.

WARNING!

372

SERVICING AND MAINTENANCE

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

page 348 for gasoline engines or

page 352

for diesel engines.

Selection Of Coolant

For further information

page 424.

NOTE:



Mixing of engine coolant (antifreeze) other than

specified Organic Additive Technology (OAT)

engine coolant, may result in engine damage

and may decrease corrosion protection. OAT

engine coolant is different and should not be

mixed with Hybrid Organic Additive Technology

(HOAT) engine coolant or any “globally compat

ible” coolant. If a non-OAT engine coolant is

introduced into the cooling system in an emer

gency, the cooling system will need to be

drained, flushed, and refilled with fresh OAT

coolant (conforming to MS.90032), by an autho

rized dealer as soon as possible.



Do not use water alone or alcohol-based engine

coolant (antifreeze) products. Do not use addi

tional 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

recommended.



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 that you 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 requirements 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 temperatures 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.

SERVICING AND MAINTENANCE

373

(Continued)

NOTE:



It is the owner's responsibility to maintain the

proper level of protection against freezing

according to the temperatures occurring in the

area where the vehicle is operated.



Use care when filling under hood fluids such as

engine oil, washer fluid, antifreeze, etc., to mini

mize 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.



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.



Mixing engine coolant types is not recom

mended and can result in cooling system

damage. If HOAT and OAT coolant are mixed in

an emergency, have an authorized dealer drain,

flush, and refill with OAT coolant (conforming to

MS.90032) as soon as possible.

Cooling System Pressure Cap

The cap must be fully tightened to prevent loss of

engine coolant (antifreeze), and to ensure that

engine coolant will return to the radiator from the

coolant expansion bottle/recovery tank if so

equipped.

The cap should be inspected and cleaned if there

is any accumulation of foreign material on the

sealing surfaces.

Disposal Of Used Coolant

Used ethylene glycol-based coolant (antifreeze)

OAT or HOAT, is a regulated substance requiring

proper disposal. Check with your local authorities

to determine the disposal rules for your

community. To prevent ingestion by animals or

children, do not store ethylene glycol-based

coolant in open containers or allow it to remain in

puddles on the ground, clean up any ground spills

immediately. If ingested, seek emergency

assistance immediately.

Coolant Level

The coolant bottle provides a quick visual method

for determining that the coolant level is adequate.

With the engine OFF and cold, the level of the

engine coolant (antifreeze) in the bottle should be

between the ranges indicated on the bottle.
The radiator normally remains completely full, so

there is no need to remove the radiator/coolant

pressure cap unless checking for engine coolant

freeze point or replacing coolant. Advise your

service attendant of this. As long as the engine

operating temperature is satisfactory, the coolant

bottle need only be checked once a month.
When additional engine coolant is needed to

maintain the proper level, only OAT coolant that

meets the requirements of the manufacturer

Material Standard MS.90032 should be added to

the coolant bottle. Do not overfill.

Engine Coolant Level — 2.0L

WARNING!



Do not open hot engine cooling system. Never

add engine coolant (antifreeze) when the

engine is overheated. Do not loosen or

remove the cap to cool an overheated engine.

Heat causes pressure to build up in the

cooling system. To prevent scalding or injury,

do not remove the pressure cap while the

system is hot or under pressure.



Do not use a pressure cap other than the one

specified for your vehicle. Personal injury or

engine damage may result.

WARNING!



Do not open hot engine cooling system. Never

add engine coolant (antifreeze) when the

engine is overheated. Do not loosen or

remove the cap to cool an overheated engine.

Heat causes pressure to build up in the

cooling system. To prevent scalding or injury,

do not remove the pressure cap while the

system is hot or under pressure.

374

SERVICING AND MAINTENANCE

With the engine OFF and cold, the level of the

engine coolant should be within the OK range

between the ADD and FULL range on the dipstick.
1. Remove the cap with level dipstick from the

engine coolant bottle.

2. Clean off the coolant from the dipstick.
3. Rest the cap on the opening of the coolant

bottle without tightening the cap.

4. Remove the cap with dipstick and check the

coolant level on the dipstick.

The radiator normally remains completely full, so

there is no need to remove the radiator/coolant

pressure cap unless checking for engine coolant

freeze point or replacing coolant. Advise your

service attendant of this. As long as the engine

operating temperature is satisfactory, the coolant

bottle need only be checked once a month.
When additional engine coolant is needed to

maintain the proper level, only OAT coolant that

meets the requirements of the manufacturer

Material Standard MS.90032 should be added to

the coolant bottle. Do not overfill.

Cooling System Notes

NOTE:

When the vehicle is stopped after a few miles/kilo

meters of operation, you may observe vapor

coming from the front of the engine compartment.

This is normally a result of moisture from rain,

snow, or high humidity accumulating on the

radiator and being vaporized when the thermostat

opens, allowing hot engine coolant (antifreeze) to

enter the radiator.
If an examination of your engine compartment

shows no evidence of radiator or hose leaks, the

vehicle may be safely driven. The vapor will soon

dissipate.



Do not overfill the coolant expansion bottle.



Check the coolant freeze point in the radiator

and in the coolant expansion bottle. If engine

coolant needs to be added, the contents of the

coolant expansion bottle must also be protected

against freezing.



If frequent engine coolant additions are

required, the cooling system should be pressure

tested for leaks.



Maintain engine coolant concentration at a

minimum of 50% OAT coolant (conforming to

MS.90032) and distilled water for proper corro

sion protection of your engine which contains

aluminum components.



Make sure that the coolant expansion bottle

overflow hoses are not kinked or obstructed.



Keep the front of the radiator clean. If your

vehicle is equipped with air conditioning, keep

the front of the condenser clean.



Do not change the thermostat for Summer or

Winter operation. If replacement is ever neces

sary, install ONLY the correct type thermostat.

Other designs may result in unsatisfactory

engine cooling performance, poor gas mileage,

and increased emissions.

RAKE

YSTEM

In order to ensure brake system performance, all

brake system components should be inspected

periodically. For the proper maintenance intervals

page 348.



Do not use a pressure cap other than the one

specified for your vehicle. Personal injury or

engine damage may result.

WARNING!

Riding the brakes can lead to brake failure and

possibly a collision. Driving with your foot resting

or riding on the brake pedal can result in

abnormally high brake temperatures, excessive

lining wear, and possible brake damage. You

would not have your full braking capacity in an

emergency.

SERVICING AND MAINTENANCE

375

(Continued)

Fluid Level Check — Brake Master Cylinder

The fluid level of the master cylinder should be

checked whenever the vehicle is serviced, or

immediately if the Brake System Warning Light is

on. If necessary, add fluid to bring level within the

designated marks on the side of the reservoir of

the brake master cylinder. Be sure to clean the top

of the master cylinder area before removing cap.

With disc brakes, fluid level can be expected to fall

as the brake pads wear. Brake fluid level should be

checked when pads are replaced. If the brake fluid

is abnormally low, check the system for leaks

page 426.

RONT

EAR

XLE

LUID

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

page 426.

WARNING!



Use only the manufacturer recommended

brake fluid

page 426. Using the wrong type

of brake fluid can severely damage your brake

system and/or impair its performance. The

proper type of brake fluid for your vehicle is

also identified on the original factory installed

hydraulic master cylinder reservoir.



To avoid contamination from foreign matter or

moisture, 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 contam

inate the brake fluid. Brake seal components

could be damaged, causing partial or

complete brake failure. This could result in a

collision.

WARNING!

376

SERVICING AND MAINTENANCE

RANSFER

ASE

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

page 348.

Selection Of Lubricant

Use only the manufacturer recommended fluid

page 426.

ANUAL

RANSMISSION

— I

QUIPPED

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

page 348.

Selection Of Lubricant

Use only the manufacturer recommended manual

transmission fluid

page 426.

UTOMATIC

RANSMISSION

—

QUIPPED

Special Additives

It is strongly recommended against using any

special additives in the transmission. Automatic

Transmission Fluid (ATF) is an engineered product

and its performance may be impaired by

supplemental additives. Therefore, do not add any

fluid additives to the transmission. Avoid using

transmission sealers as they may adversely affect

seals.

1 — Fill hole
2 — Drain hole

CAUTION!

Do not use chemical flushes in your

transmission as the chemicals can damage your

transmission components. Such damage is not

covered by the New Vehicle Limited Warranty.

SERVICING AND MAINTENANCE

377

(Continued)

Fluid Level Check

The fluid level is preset at the factory and does not

require adjustment under normal operating

conditions. Routine fluid level checks are not

required; therefore the transmission has no

dipstick. An authorized dealer can check your

transmission fluid level using special service tools.

If you notice fluid leakage or transmission

malfunction, visit an authorized dealer

immediately to have the transmission fluid level

checked. Operating the vehicle with an improper

fluid level can cause severe transmission damage.

Fluid And Filter Changes

Under normal operating conditions, the fluid

installed at the factory will provide satisfactory

lubrication for the life of the vehicle.

Routine fluid and filter changes are not required.

However, change the fluid and filter if the fluid

becomes contaminated (with water, etc.), or if the

transmission is disassembled for any reason.

Selection Of Lubricant

It is important to use the proper transmission fluid

to ensure optimum transmission performance and

life. Use only the manufacturer specified

transmission fluid

page 426. It is important to

maintain the transmission fluid at the correct level

using the recommended fluid.

NOTE:

No chemical flushes should be used in any trans

mission; only the approved lubricant should be

used.

USES

General Information

CAUTION!

If a transmission fluid leak occurs, visit an

authorized dealer immediately. Severe

transmission damage may occur. An authorized

dealer has the proper tools to adjust the fluid

level accurately.

CAUTION!

Using a transmission fluid other than the

manufacturer recommended fluid may cause

deterioration in transmission shift quality and/or

torque converter shudder

page 426.

WARNING!



When replacing a blown fuse, always use an

appropriate replacement fuse with the same

amp rating as the original fuse. Never replace

a fuse with another fuse of higher amp rating.

The use of a fuse with a rating other than indi

cated may result in a dangerous electrical

system overload. If a properly rated fuse

continues to blow, it indicates a problem in the

circuit that must be corrected. Never replace a

blown fuse with metal wires or any other mate

rial. Failure to use proper fuses may result in

serious personal injury, fire and/or property

damage.



Before replacing a fuse, make sure that the

ignition is off and that all the other services

are switched off and/or disengaged.



If the replaced fuse blows again, contact an

authorized dealer.

378

SERVICING 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.

Jeep Wrangler (2022 year). Manual in english - page 23