Jeep Wrangler JK (2018 year). Instruction

NOTE:

Push the

⬙ESC Off⬙ switch to place the Electronic

Stability Control (ESC) system in

⬙Partial Off⬙ mode before

rocking the vehicle. Refer to “Electronic Brake Control
System” in “Safety” for further information. Once the
vehicle has been freed, push the

⬙ESC Off⬙ switch again to

restore

⬙ESC On⬙ mode.

WARNING!

Fast spinning tires can be dangerous. Forces generated
by excessive wheel speeds may cause damage, or even
failure, of the axle and tires. A tire could explode and
injure someone. Do not spin your vehicle’s wheels
faster than 30 mph (48 km/h) or for longer than 30
seconds continuously without stopping when you are
stuck and do not let anyone near a spinning wheel, no
matter what the speed.

CAUTION!

• When “rocking” a stuck vehicle by shifting between

DRIVE/SECOND GEAR and REVERSE, do not spin
the wheels faster than 15 mph (24 km/h), or drive-
train damage may result.

• Revving the engine or spinning the wheels too fast

may lead to transmission overheating and failure. It
can also damage the tires. Do not spin the wheels
above 30 mph (48 km/h) while in gear (no transmis-
sion shifting occurring).

TOWING A DISABLED VEHICLE

This section describes procedures for towing a disabled
vehicle using a commercial towing service. If the transmis-
sion and drivetrain are operable, disabled vehicles may
also be towed as described under “Recreational Towing” in
the “Starting And Operating” section.

IN CASE OF EMERGENCY

355

Towing Condition

Wheels OFF The Ground

4WD MODELS

Flat Tow

NONE

See instructions under “Recreational Towing” in

“Starting And Operating”.

• Automatic Transmission in PARK

• Manual Transmission in gear ( NOT in NEU-

TRAL)

• Transfer Case in NEUTRAL

• Tow in forward direction

Wheel Lift Or Dolly Tow

Front

NOT ALLOWED

Rear

NOT ALLOWED

Flatbed

ALL

BEST METHOD

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 man-
datory. Attach a tow bar or other towing device to main
structural members of the vehicle, not to 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, refer to “Gear Selector
Override” in this section for instructions on shifting the
automatic transmission out of PARK for towing.

NOTE:

For RHD Postal models, refer to the Postal Supple-

ment for towing instructions.

356

IN CASE OF EMERGENCY

CAUTION!

• Do not use sling type equipment when towing.

Vehicle damage may occur.

• When securing the vehicle to a flat bed truck, do not

attach to front or rear suspension components. Dam-
age to your vehicle may result from improper towing.

Without The Ignition Key

Special care must be taken when the vehicle is towed with
the ignition in the LOCK position. The only approved
method of towing without the ignition key is with a flatbed
truck. Proper towing equipment is necessary to prevent
damage to the vehicle.

Four–Wheel Drive Models

The manufacturer 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
(for automatic transmissions) or in gear ( NOT in NEU-
TRAL

, for manual transmissions). Refer to “Recreational

Towing” in “Starting And Operating” for detailed instruc-
tions.

CAUTION!

• Front or rear wheel lifts must not be used (if the

remaining wheels are on the ground). Internal dam-
age to the transmission or transfer case will occur if
a front or rear wheel lift is used when towing.

• Towing this vehicle in violation of the above require-

ments can cause severe transmission and/or transfer
case damage. Damage from improper towing is not
covered under the New Vehicle Limited Warranty.

IN CASE OF EMERGENCY

357

Emergency Tow Hooks — If Equipped

If your vehicle is equipped with tow hooks, they are
mounted in the front and the rear.

NOTE:

For off-road recovery, it is recommended to use

both of the front tow hooks to minimize the risk of damage
to the vehicle. Always use an appropriately rated tow
strap.

WARNING!

• Do not use a chain for freeing a stuck vehicle. Chains

may break, causing serious injury or death.

• Stand clear of vehicles when pulling with tow hooks.

Tow straps may become disengaged, causing serious
injury.

CAUTION!

Tow hooks are for emergency use only, to rescue a
vehicle stranded off road. Do not use tow hooks for
tow truck hookup or highway towing. You could
damage your vehicle. Tow straps are recommended
when towing the vehicle, chains may cause vehicle
damage.

ENHANCED ACCIDENT RESPONSE SYSTEM
(EARS)

This vehicle is equipped with an Enhanced Accident
Response System.

Please refer to “Occupant Restraint Systems” in “Safety”
for further information on the Enhanced Accident Re-
sponse System (EARS) function.

EVENT DATA RECORDER (EDR)

This vehicle is equipped with an Event Data Recorder
(EDR). The main purpose of an EDR is to record data that
will assist in understanding how a vehicle’s systems per-
formed under certain crash or near crash-like situations,
such as an air bag deployment or hitting a road obstacle.

Please refer to “Occupant Restraint Systems” in “Safety”
for further information on the Event Data Recorder (EDR).

358

IN CASE OF EMERGENCY

SCHEDULED SERVICING

Your vehicle is equipped with an automatic oil change
indicator system. The oil change indicator system will
remind you that it is time to take your vehicle in for
scheduled maintenance.

Based on engine operation conditions, the oil change
indicator message will illuminate. This means that service
is required for your vehicle. Operating conditions such as
frequent short-trips, trailer tow, extremely hot or cold
ambient temperatures will influence when the “Change
Oil” or “Oil Change Required” message is displayed.
Severe Operating Conditions can cause the change oil
message to illuminate as early as 3,500 miles (5,600 km)
since last reset. Have your vehicle serviced as soon as
possible, within the next 500 miles (805 km).

On vehicles equipped with instrument cluster display, “Oil
Change Required” will be displayed and a single chime
will sound, indicating that an oil change is necessary.

On non-instrument cluster display equipped vehicles,
“Change Oil” will flash in the instrument cluster odometer
and a single chime will sound, indicating that an oil change
is necessary.

Your authorized dealer will reset the oil change indicator
message after completing the scheduled oil change. If a
scheduled oil change is performed by someone other than
your authorized dealer, the message can be reset by
referring to the steps described under “Warning And
Indicator Lights” or “Instrument Cluster Display” in “Get-
ting To Know Your Instrument Panel” for further informa-
tion.

NOTE:

Under no circumstances should oil change inter-

vals exceed 10,000 miles (16,000 km), twelve months or 350
hours of engine run time, whichever comes first. The 350
hours of engine run or idle time is generally only a concern
for fleet customers.

Severe Duty All Models

Change Engine Oil at 4,000 miles (6,500 km) or 350 hours of
engine run time if the vehicle is operated in a dusty and off
road environment or is operated predominately at idle or
only very low engine RPM’s. This type of vehicle use is
considered Severe Duty.

SERVICING AND MAINTENANCE

361

Once A Month Or Before A Long Trip:
• Check engine oil level
• Check windshield washer fluid level
• Check the tire inflation pressures and look for unusual

wear or damage

• Check the fluid levels of the coolant reservoir, brake

master cylinder, power steering and automatic transmis-
sion, and fill as needed

• Check function of all interior and exterior lights

Maintenance Plan

Required Maintenance Intervals

Refer to the maintenance plan on the following pages for
the required maintenance intervals.

At Every Oil Change Interval As Indicated By Oil

Change Indicator System:

• Change oil and filter

At Every Oil Change Interval As Indicated By Oil

Change Indicator System:

• Rotate the tires

Rotate at the first sign of irregular wear, even if it
occurs before the oil indicator system turns on

• Inspect battery and clean and tighten terminals as

required

• Inspect automatic transmission fluid if equipped

with dipstick

• Inspect brake pads, shoes, rotors, drums, hoses and

park brake

• Inspect engine cooling system protection and hoses
• Inspect exhaust system
• Inspect engine air cleaner if using in dusty or

off-road conditions

• Inspect all door latches for presence of grease,

reapply if necessary.

362

SERVICING AND MAINTENANCE

Mileage or time passed (which-

ever comes first)

20,000

30,000

40,000

50,000

60,000

70,000

80,000

90,000

100,000

10,000

120,000

130,000

140,000

150,000

Or Years:

Or Kilometers:

32,000

48,000

64,000

80,000

96,000

12,000

128,000

144,000

160,000

176,000

192,000

208,000

224,000

240,000

Additional Inspections

Inspect the CV/Universal joints.

Inspect front suspension, tie rod
ends, and replace if necessary.

Inspect the front and rear axle
fluid.

Inspect the brake linings, replace
as necessary

Adjust parking brake on vehicles
equipped with four wheel disc
brakes.

Inspect transfer case fluid.

Additional Maintenance

Replace engine air cleaner filter.

Replace air conditioning/cabin air
filter.

Replace spark plugs **

SERVICING AND MAINTENANCE

363

Mileage or time passed (which-

ever comes first)

20,000

30,000

40,000

50,000

60,000

70,000

80,000

90,000

100,000

10,000

120,000

130,000

140,000

150,000

Or Years:

Or Kilometers:

32,000

48,000

64,000

80,000

96,000

12,000

128,000

144,000

160,000

176,000

192,000

208,000

224,000

240,000

Flush and replace the engine cool-
ant at 10 years or 150,000 miles
(240,000 km) whichever comes
first.

Change automatic transmission
fluid and filter if using your vehicle
for any of the following: police,
taxi, fleet, or frequent trailer tow-
ing.

Change the automatic transmis-
sion fluid and filter.

Change the manual transmission
fluid if using your vehicle for any of
the following: trailer towing, snow
plowing, heavy loading, taxi, po-
lice, delivery service (commercial
service), off-road, desert operation
or more than 50% of your driving
is at sustained high speeds during
hot weather, above 90°F (32°C).

364

SERVICING AND MAINTENANCE

Mileage or time passed (which-

ever comes first)

20,000

30,000

40,000

50,000

60,000

70,000

80,000

90,000

100,000

10,000

120,000

130,000

140,000

150,000

Or Years:

Or Kilometers:

32,000

48,000

64,000

80,000

96,000

12,000

128,000

144,000

160,000

176,000

192,000

208,000

224,000

240,000

Change transfer case fluid if using
your vehicle for any of the follow-
ing: police, taxi, fleet, or frequent
trailer towing.

Inspect and replace PCV valve if
necessary.

Change front and rear axle fluid if
using your vehicle for police, taxi,
fleet, off-road or frequent trailer
towing.

** The spark plug change interval is mileage based only,
yearly intervals do not apply.

SERVICING AND MAINTENANCE

365

WARNING!

• You can be badly injured working on or around a

motor vehicle. Do only service work for which you
have the knowledge and the right equipment. If you
have any doubt about your ability to perform a
service job, take your vehicle to a competent me-
chanic.

• Failure to properly inspect and maintain your vehicle

could result in a component malfunction and effect

(Continued)

WARNING! (Continued)

vehicle handling and performance. This could cause
an accident.

Heavy Duty Use Of The Vehicle

Change engine oil at 4,000 miles (6,500 km) or 350 hours of
engine run time if the vehicle is operated in a dusty and off
road environment or is operated predominately at idle or
only very low engine RPM’s. This type of vehicle use is
considered Severe Duty.

366

SERVICING AND MAINTENANCE

Checking Oil Level

To ensure proper lubrication of your vehicle’s engine, the
engine oil must be maintained at the correct level. The
engine oil level should be checked five minutes after a
warmed up engine has been shut off.

Checking the oil while the vehicle is on level ground will
improve the accuracy of the oil level readings. Always
maintain the oil level within the SAFE zone on the dipstick.
Adding 1 quart (0.95 liters) of oil when the reading is at the
bottom of the crosshatch zone will result in a reading at the
top of the crosshatch zone on these engines.

CAUTION!

Overfilling or underfilling the crankcase will cause
aeration or loss of oil pressure. This could damage your
engine.

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.

WARNING!

Commercial windshield washer solvents are flam-
mable. They could ignite and burn you. Care must be
exercised when filling or working around the washer
solution.

Maintenance-Free Battery

Your vehicle is equipped with a maintenance-free battery.
You will never have to add water, nor is periodic mainte-
nance required.

368

SERVICING AND MAINTENANCE

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. Refer to “Jump Starting
Procedure” in “In Case Of Emergency” for further
information.

• 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 con-

tain lead and lead compounds. Wash hands after
handling.

CAUTION!

• It is essential when replacing the cables on the

battery that the positive cable is attached to the
positive post and the negative cable is attached to the

(Continued)

CAUTION! (Continued)

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.

DEALER SERVICE

Your authorized dealer has the qualified service personnel,
special tools, and equipment to perform all service opera-
tions in an expert manner. Service Manuals are available
which include detailed service information for your ve-
hicle. Refer to these Service Manuals before attempting any
procedure yourself.

NOTE:

Intentional tampering with emissions control sys-

tems may void your warranty and could result in civil
penalties being assessed against you.

SERVICING AND MAINTENANCE

369

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.

Engine Oil

Change Engine Oil — Gasoline Engine

Refer to “Scheduled Servicing” in this section for the
proper maintenance intervals.

NOTE:

Under no circumstances should oil change inter-

vals exceed 10,000 miles (16,000 km), 12 months or 350
hours of engine run time, whichever comes first. The 350
hours of engine run or idle time is generally only a concern
for fleet customers.

Gasoline Engine Oil Selection

For best performance and maximum protection under all
types of operating conditions, the manufacturer only rec-
ommends engine oils that are API Certified and meet the
requirements of FCA Material Standard MS-6395.

American Petroleum Institute (API) Engine Oil
Identification Symbol

This symbol means that the oil has
been certified by the American Pe-
troleum Institute (API). The manu-
facturer only recommends API Cer-
tified engine oils.

This symbol certifies 0W-20, 5W-20,
0W-30, 5W-30 and 10W-30 engine
oils.

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.

Engine Oil Viscosity (SAE Grade) — 3.6L Engine

Mopar SAE 5W-20 engine oil approved to FCA Material
Standard MS-6395 such as Pennzoil, Shell Helix or equiva-
lent is recommended for all operating temperatures. This
engine oil improves low temperature starting and vehicle
fuel economy.

370

SERVICING AND MAINTENANCE

Jeep Wrangler JK (2018 year). Instruction - part 23