service interval JEEP WRANGLER 2020 Owner handbook (in English)

The ORC also includes diagnostics that will
illuminate the instrument panel Air Bag
Warning Light if a malfunction is detected
that could affect the air bag system. The
diagnostics also record the nature of the
malfunction. While the air bag system is
designed to be maintenance free, if any of the
following occurs, have an authorized dealer
service the air bag system immediately.
• The Air Bag Warning Light does not come
on during the four to eight seconds when
the ignition switch is first in the ON/RUN
position.
• The Air Bag Warning Light remains on after
the four to eight-second interval.
• The Air Bag Warning Light comes on inter-
mittently or remains on while driving.
NOTE:
If the speedometer, tachometer, or any en-
gine related gauges are not working, the Oc-
cupant Restraint Controller (ORC) may also
be disabled. In this condition the air bags
may not be ready to inflate for your protec-
tion. Have an authorized dealer service the air
bag system immediately.WARNING!
Ignoring the Air Bag Warning Light in your
instrument panel could mean you won’t
have the air bag system to protect you in a
collision. If the light does not come on as a
bulb check when the ignition is first turned
on, stays on after you start the vehicle, or if
it comes on as you drive, have an autho-
rized dealer service the air bag system
immediately.
Front Air Bags
This vehicle has front air bags and lap/
shoulder belts for both the driver and front
passenger. The front air bags are a supple-
ment to the seat belt restraint systems. The
driver front air bag is mounted in the center of
the steering wheel. The passenger front air
bag is mounted in the instrument panel,
above the glove compartment. The words
“SRS AIRBAG” or “AIRBAG” are embossed
on the air bag covers.
WARNING!
• Being too close to the steering wheel or
instrument panel during front air bag
deployment could cause serious injury,
including death. Air bags need room to
inflate. Sit back, comfortably extending
Front Air Bag/Knee Impact Bolster
Locations
1 — Driver And Passenger Front Air
Bags
2 — Driver And Passenger Knee Impact
Bolsters
93

SCHEDULED SERVICING
Scheduled Servicing — Gasoline Engine
The scheduled services listed in this manual
must be done at the times or mileages speci-
fied to protect your vehicle warranty and
ensure the best vehicle performance and re-
liability. More frequent maintenance may be
needed for vehicles in severe operating con-
ditions, such as dusty areas and very short
trip driving. Inspection and service should
also be done anytime a malfunction is sus-
pected.
The oil change indicator system will remind
you that it is time to take your vehicle in for
scheduled maintenance.
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.The oil change indicator message will illumi-
nate approximately 7,000 miles
(11,200 km) after the most recent oil change
was performed. Have your vehicle serviced as
soon as possible, within 500 miles (800 km).
However, an earlier oil change at 4,500 miles
(7,500 km) may be required if the vehicle is
operated under “Severe Duty Conditions”
later in this section.
NOTE:
• The oil change indicator message will not
monitor the time since the last oil change.
Change your vehicle's oil if it has been
6 months since your last oil change even if
the oil change indicator message is NOT
illuminated.
• Change your engine oil more often if you
drive your vehicle off-road for an extended
period of time.
• Under no circumstances should oil change
intervals exceed 7,500 miles (12,000 km)
or 6 months, whichever comes first.
Your authorized dealer will reset the oil
change indicator message after completing
the scheduled oil change.Once A Month Or Before A Long Trip
• Check the engine oil level about five min-
utes after a fully warmed engine is shut off.
Checking the oil level while the vehicle is
on level ground will improve the accuracy of
the oil level reading. Add oil only when the
level is at or below the ADD or MIN mark.
• Check the windshield washer solvent and
add if required.
• Check tire pressure and look for unusual
wear or damage. Rotate tires at the first
sign of irregular wear, even if it occurs
before the oil indicator system turns on.
• Inspect the battery and clean and tighten
the terminals as required.
• Check the fluid levels of coolant reservoir,
automatic transmission, brake master cyl-
inder and power steering and fill as needed.
• Check all lights and other electrical items
for correct operation.
SERVICING AND MAINTENANCE
170

Mileage or time passed (which-
ever comes first)
7,500
15,000
22,500
30,000
37,500
45,000
52,500
60,000
67,500
75,000
82,500
90,000
97,500
105,000
112,500
120,000
127,500
135,000
142,500
150,000
Or Months: 12 24 36 48 60 72 84 96 108 120 132 144 156 168 180 192 204 216 228 240
Or Kilometers:
12,000
24,000
36,000
48,000
60,000
72,000
84,000
96,000
108,000
120,000
132,000
144,000
156,000
168,000
180,000
192,000
204,000
216,000
228,000
240,000
Change the manual transmission
fluid if using your vehicle for any
of the following: trailer towing,
snow plowing, heavy loading,
taxi, police, delivery service
(commercial service), off-road,
desert operation or more than
50% of your driving is at sus-
tained high speeds during hot
weather, above 90°F (32°C).XX X X X
Change transfer case fluid if us-
ing your vehicle for any of the
following: police, taxi, fleet, or
frequent trailer towing.XX
Inspect and replace PCV valve if
necessary.†X
* DOT 4 brake fluid is time based only;
mileage intervals do not apply.
** The spark plug change interval is mileage
based only, yearly intervals do not apply.† This maintenance is recommended by the
manufacturer to the owner, but is not re-
quired to maintain emissions warranty.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
SERVICING AND MAINTENANCE
174

* The actual interval for changing engine oil
and replacing the engine oil filter depends on
the vehicle usage conditions and is signalled
by the warning light or message in the instru-
ment panel. In all cases, never exceed 1 year/
15,000 miles (24,000 km).
** DOT 4 brake fluid is time based only;
mileage intervals do not apply.
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 com-
petent mechanic.
• Failure to properly inspect and maintain
your vehicle could result in a component
malfunction and effect vehicle handling
and performance. This could cause an
accident.
179

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 cooling system hoses for
brittle rubber, cracking, tears, cuts, and
tightness of the connection at the coolant
recovery bottle and radiator. Inspect the en-
tire system for leaks. DO NOT REMOVE THE
COOLANT PRESSURE CAP WHEN THE
COOLING SYSTEM IS HOT.
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 radia-
tor 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 solu-
tion or mixture that meets or exceeds the
temperature range of your climate. This rat-
ing information can be found on most washer
fluid containers.
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.
Brake System
In order to assure brake system performance,
all brake system components should be in-
spected periodically. Refer to the “Mainte-
nance Plan” in this section for the proper
maintenance intervals.
WARNING!
Riding the brakes can lead to brake failure
and possibly a collision. Driving with your
foot resting or riding on the brake pedal
WARNING!
can result in abnormally high brake tem-
peratures, excessive lining wear, and pos-
sible brake damage. You would not have
your full braking capacity in an emergency.
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 cylin-
der 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 sys-
tem for leaks.
Refer to “Fluids And Lubricants” in “Techni-
cal Specifications” for further information.
183

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. Close A/C Air Filter access doors and se-
cure retaining tabs.
9. Rotate the glove compartment door back
into position.
Refer to the “Maintenance Plan” for the
proper maintenance intervals.
DEALER SERVICE
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 be-
fore 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.
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 ser-
vice job, take your vehicle to a competent
mechanic.
Windshield Wiper Blades
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 prod-
ucts such as engine oil, gasoline, etc.
NOTE:
Life expectancy of wiper blades varies de-
pending on geographical area and frequency
of use. Poor performance of blades may be
present with chattering, 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
189

CAUTION!
pension components, it is important
that only traction devices in good condi-
tion are used. Broken devices can cause
serious damage. Stop the vehicle imme-
diately if noise occurs that could indi-
cate device breakage. Remove the dam-
aged parts of the device before further
use.
• Install device as tightly as possible and
then retighten after driving about ½ mile
(0.8 km).
• Do not exceed 30 mph (48 km/h).
• Drive cautiously and avoid severe turns
and large bumps, especially with a
loaded vehicle.
• Do not drive for a prolonged period on
dry pavement.
• Observe the traction device manufactur-
er’s instructions on the method of instal-
lation, operating speed, and conditions
for use. Always use the suggested oper-
ating speed of the device manufacturer’s
if it is less than 30 mph (48 km/h).
• Do not use traction devices on a com-
pact spare tire.
Tire Rotation Recommendations
The tires on the front and rear of your vehicle
operate at different loads and perform differ-
ent steering, handling, and braking func-
tions. For these reasons, they wear at unequal
rates.
These effects can be reduced by timely rota-
tion of tires. The benefits of rotation are
especially worthwhile with aggressive tread
designs such as those on On/Off Road type
tires. Rotation will increase tread life, help to
maintain mud, snow, and wet traction levels,
and contribute to a smooth, quiet ride.
Refer to the “Maintenance Plan” for the
proper maintenance intervals. The reasons
for any rapid or unusual wear should be
corrected prior to rotation being performed.
The suggested rotation method is the
“rearward-cross” shown in the following
diagram.
CAUTION!
Proper operation of four-wheel drive ve-
hicles depends on tires of equal size, type
and circumference on each wheel. Any
difference in tire size can cause damage to
the transfer case. Tire rotation schedule
should be followed to balance tire wear.
STORING THE VEHICLE
If you are storing your vehicle for more than
21 days, we recommend that you take the
following steps to minimize the drain on your
vehicle's battery:
• Disconnect the negative cable from battery.
• Any time you store your vehicle or keep it
out of service (i.e., vacation) for two weeks
Tire Rotation
201

Cold Weather Operation..........117
Compact Spare Tire.............198
Connector
UCI ....................233
Universal Consumer Interface
(UCI)...................233
Cooling System...............182
Coolant Capacity............210
Inspection................182
Selection Of Coolant (Antifreeze) . .210
Customer Assistance............242
Daytime Running Lights...........29
Dealer Service................189
Defroster, Windshield............113
Delay (Intermittent) Wipers.........31
Diagnostic System, Onboard........64
Diesel Engine Maintenance........175
Diesel Fuel..................209
Diesel Fuel Requirements.........209
Dimmer Switch, Headlight.........29
Dipsticks
Oil (Engine)...............182
Disabled Vehicle Towing..........165
Disarming, Security System.........18
Doors......................19Driver's Seat Back Tilt............21
Electronic Brake Control System......69
Anti-Lock Brake System........68
Electronic Roll Mitigation.......75
Traction Control System........71
Electronic Speed Control (Cruise
Control)..................136
Electronic Stability Control (ESC).....71
Electronic Throttle Control Warning
Light.....................60
Emergency Brake..............121
Emergency, In Case Of
Jacking..............154, 192
Jump Starting..............160
Engine.....................180
Break-In Recommendations.....121
Compartment...........180, 181
Compartment Identification . .180, 181
Cooling.................
.182
Exhaust Gas Caution..........112
Fails To Start...............118
Flooded, Starting............118
Fuel Requirements...........210
Jump Starting..............160
Oil .....................210
Oil Change Interval...........58Oil Filler Cap..............180
Oil Selection..............210
Overheating...............163
Starting.................117
Enhanced Accident Response
Feature................98, 168
Exhaust Gas Caution............112
Exhaust System...............112
Exterior Lights.............28, 114
Fabric Care..................203
Fabric Top..................203
Filters
Air Conditioning..........38, 187
Flashers
Hazard Warning.............146
Turn Signal......64, 114, 148, 149
Flash-To-Pass.................29
Flooded Engine Starting..........118
Fluid, Brake.................211
Fluid Capacities...............210
Fluid Leaks..................114
Fluid Level Checks
Brake...................183
Engine Oil................182
Manual Transmission.........184
Fluids And Lubricants...........210
INDEX
260

AirBag .............58, 92, 113
Automatic Headlights..........29
Back-Up.................149
Brake Assist Warning..........75
Bulb Replacement.......146, 147
Center Mounted Stop.........149
Cruise...................64
Daytime Running............29
Dimmer Switch, Headlight.......29
Exterior..................114
Fog .................29, 148
Hazard Warning Flasher........146
Headlight Leveling............30
Headlights.............28, 147
Headlight Switch.............28
High Beam................29
High Beam/Low Beam Select.....29
Hill Descent Control Indicator.....76
Instrument Cluster............28
Malfunction Indicator
(Check Engine)..............61
Passing..................29
Rear Fog.................148
Rear Servicing.............149
Rear Tail Lamps............149
Seat Belt Reminder...........60
Security Alarm..............61Service..............146, 147
Side Marker...............149
Tire Pressure Monitoring (TPMS) . . .62
Traction Control.............75
Turn Signal . . .29, 64, 114, 148, 149
Warning (Instrument Cluster
Description)................64
Locking Axle.................132
Lug Nuts...................208
Maintenance Free Battery.........186
Maintenance Schedule.......170, 175
Diesel..................175
Malfunction Indicator Light
(Check Engine)...............61
Manual Transmission........123, 184
Fluid Level Check...........184
Lubricant Selection..........211
Shift Speeds.............
.124
Media Center Radio.............220
Memory Feature (Memory Seat)......21
Memory Seat..................21
Memory Seats And Radio..........21
Mirrors.....................28
Heated...................28
Modifications/Alterations, Vehicle......4
Monitor, Tire Pressure System.......77Mopar.....................212
Mopar Accessories.............212
Navigation..................229
Navigation System (Uconnect GPS) . . .229
Navigation Voice Prompt Volume.....229
New Vehicle Break-In Period.......121
Occupant Restraints.............84
Octane Rating, Gasoline (Fuel)......209
Oil Change Indicator..........58, 176
Oil Change Indicator, Reset.....58, 176
Oil, Engine
Capacity.................210
Change Interval..............58
Dipstick.................182
Pressure Warning Light.........60
Recommendation...........210
Viscosity.................210
Oil Pressure Light...............60
Onboard Diagnostic System.........64
Operating Precautions............64
Operator Manual (Owner's Manual).....4
Outlet
Power...................52
Overheating, Engine............163
INDEX
262