Jeep WRANGLER 2020 User manual

Whether it’s providing information about specific product features, taking a tour through your vehicle’s
heritage, knowing what steps to take following an accident or scheduling your next appointment, we know
you’ll find the app an important extension of your Jeepbrand vehicle.
Simply download the app, select your make and model and enjoy the ride. To get this app, go directly to the App Store®
or Google Play® Store and enter the search keyword “JEEP” (U.S. residents only).
2020 WRANGLER
DIESEL SUPPLEMENT
P68457931AA
First Edition
© 2019 FCA US LLC. All Rights Reserved. Tous droits réservés.
Jeep is a registered trademark of FCA US LLC. Jeep est une marque déposée de FCA US LLC.
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UP-TO-DATE OWNER’S MANUAL, UCONNECT AND
WARRANTY BOOKLETS
mopar.com owners.mopar.ca
U. S. Canada

WARNING: Operating, servicing and maintaining a passenger vehicle or o-highway
motor vehicle can expose you to chemicals including engine exhaust, carbon monoxide,
phthalates, and lead, which are known to the State of California to cause cancer and
birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust,
do not idle the engine except as necessary, service your vehicle in a well-ventilated area
and wear gloves or wash your hands frequently when servicing your vehicle. For more
information go to www.P65Warnings.ca.gov/passenger-vehicle.
This Owner’s Manual Supplement illustrates and describes the operation of features and equipment that are either standard or optional
on this vehicle. This supplement may also include a description of features and equipment that are no longer available or were not
ordered on this vehicle. Please disregard any features and equipment described in this manual that are not on this vehicle. FCA US LLC
reserves the right to make changes in design and specifications, and⁄or make additions to or improvements to its products without
imposing any obligation upon itself to install them on products previously manufactured.
With respect to any vehicles sold in Canada, the name FCA US LLC shall be deemed to be deleted and the name FCA Canada Inc.
used in substitution therefore.
If you are the first registered retail owner of your vehicle, you may obtain a complimentary printed copy of the Warranty Booklet by
calling 1-877-426-5337 (U.S.) or 1-800-387-1143 (Canada) or by contacting your dealer.
This Owner’s Manual Supplement is intended to familiarize you with the important features of your vehicle. Your most up-to-date
Owner’s Manual Supplement, Navigation⁄Uconnect manuals and Warranty Booklet can be found by visiting the website on the back
cover. U.S. residents can purchase replacement kits by visiting www.techauthority.com and Canadian residents can purchase
replacement kits by calling 1-800-387-1143.
The driver’s primary responsibility is the safe operation of the vehicle. Driving while distracted can result in loss of vehicle control,
resulting in an accident and personal injury. FCA US LLC strongly recommends that the driver use extreme caution when using
any device or feature that may take their attention o the road. Use of any electrical devices, such as cellular telephones,
computers, portable radios, vehicle navigation or other devices, by the driver while the vehicle is moving is dangerous and could
lead to a serious accident. Texting while driving is also dangerous and should never be done while the vehicle is moving. If you
find yourself unable to devote your full attention to vehicle operation, pull o the road to a safe location and stop your vehicle.
Some states or provinces prohibit the use of cellular telephones or texting while driving. It is always the driver’s responsibility to
comply with all local laws.
This Owner’s Manual Supplement has been prepared to help you get acquainted with your new Jeep® brand vehicle and to
provide a convenient reference source for common questions.
Not all features shown in this manual may apply to your vehicle. For additional information, visit www.mopar.com (U.S.),
www.mopar.ca (Canada) or your local Jeep®brand dealer.
Driving after drinking can lead to an accident. Your perceptions are less sharp, your
reflexes are slower and your judgment is impaired when you have been drinking.
Never drink and then drive.
WARNING
Drunk driving is one of the most frequent causes of accidents. Your driving ability can
be seriously impaired with blood alcohol levels far below the legal minimum. If you are
drinking, don’t drive. Ride with a designated non-drinking driver, call a cab, a friend or
use public transportation.
DRIVING AND ALCOHOL

TABLE OF CONTENTS
1
2
3
4
5
6
7
1 INTRODUCTION ............................................................................................................................. 3
2 GETTING TO KNOW YOUR VEHICLE ...................................................................................4
3 GETTING TO KNOW YOUR INSTRUMENT PANEL .......................................................... 5
4 STARTING AND OPERATING ................................................................................................. 14
5 SERVICING AND MAINTENANCE .........................................................................................33
6 TECHNICAL SPECIFICATIONS .............................................................................................. 48
7 INDEX ............................................................................................................................................... 54
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2
INTRODUCTION
A MESSAGE FROM FCA US LLC............................3
GETTING TO KNOW YOUR VEHICLE
REMOTE STARTING SYSTEM ................................ 4
How To Use Remote Start ............................. 4
GETTING TO KNOW YOUR INSTRUMENT PANEL
INSTRUMENT CLUSTER ......................................... 5
Instrument Cluster Descriptions................... 6
INSTRUMENT CLUSTER DISPLAY ......................... 8
Diesel Displays............................................... 8
Fuel Filter Life Reset...................................... 9
Diesel Particulate Filter (DPF) Messages — If
Equipped ........................................................ 9
Diesel Exhaust Fluid (DEF) Warning Messages
10
Diesel Exhaust Fluid (DEF) Fault Warning
Messages ..................................................... 11
WARNING LIGHTS AND MESSAGES ..................12
Yellow Indicator Lights.................................13
STARTING AND OPERATING
STARTING THE ENGINE — 3.0L DIESEL ENGINE .
14
Automatic Transmission.............................. 15
Extreme Cold Weather................................. 15
Normal Starting............................................ 15
Starting Fluids..............................................16
ENGINE BLOCK HEATER — IF EQUIPPED ..........16
ENGINE BREAK-IN RECOMMENDATIONS — 3.0L
DIESEL ................................................................... 17
NORMAL OPERATION — 3.0L DIESEL ENGINE. 17
Cold Weather Precautions .......................... 18
Engine Idling ................................................ 19
Stopping The Engine ................................... 20
Cooling System Tips — Automatic Transmission
21
REFUELING THE VEHICLE — DIESEL ENGINE .. 22
Avoid Using Contaminated Fuel.................. 22
Bulk Fuel Storage — Diesel Fuel................. 22
Diesel Exhaust Fluid .................................... 23
TRAILER TOWING ............................................... 25
Common Towing Definitions ....................... 25
Trailer Hitch Classification .......................... 28
Trailer Towing Weights (Maximum Trailer
Weight Ratings) — Diesel ........................ 28
Trailer And Tongue Weight ......................... 29
Towing Requirements ................................. 29
Towing Tips .................................................. 32
SERVICING AND MAINTENANCE
SCHEDULED SERVICING — DIESEL ENGINE .... 33
Maintenance Plan — Diesel Fuel Up To B5
Biodiesel....................................................... 34
Additional Maintenance — B6 To B20 Biodiesel
36
ENGINE COMPARTMENT ................................... 37
3.0L Diesel Engine ...................................... 37
Checking Oil Level — 3.0L Diesel Engine ... 38
DEALER SERVICE .................................................38
Engine Oil .................................................... 38
Engine Oil Filter .......................................... 39
Engine Air Cleaner Filter ............................ 39
Draining Fuel/Water Separator Filter ....... 41
Underbody Mounted Fuel Filter Replacement
42
Priming If The Engine Has Run Out Of Fuel 43
Intervention Regeneration Strategy —
Message Process Flow ............................... 44
Diesel Exhaust Fluid.................................... 44
Cooling System ............................................ 44
TECHNICAL SPECIFICATIONS
FUEL REQUIREMENTS ........................................48
Diesel Fuel Specifications........................... 48
Biodiesel Fuel Requirements...................... 49
FLUID CAPACITIES ............................................51
FLUIDS AND LUBRICANTS ..................................52
Engine ........................................................ 52
Chassis ....................................................... 53
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3
INTRODUCTION
A MESSAGE FROM FCA US LLC
FCA US LLC welcomes you as a turbocharged diesel-powered vehicle owner. Your diesel vehicle will sound, feel, drive and operate differently from a
gasoline-powered vehicle. It is important that you read and understand this manual.
You may find that some of the starting, operating, and maintenance procedures are different. However, they are simple to follow and careful
adherence to them will ensure that you take full advantage of the features of this engine.
NOTE:
Some aftermarket products may cause severe engine/transmission and/or exhaust system damage. Your vehicle's powertrain control systems can
detect and store information about vehicle modifications that increase horsepower and torque output such as whether or not perfor-
mance-enhancing powertrain components, commonly referred to as downloaders, power boxes, or performance chips have been used.
Any chassis/suspension or tire size modifications to the vehicle will affect the performance of the Adaptive Cruise Control and Forward Collision
Warning System.
This information cannot be erased and will stay in the system's memory even if the modification is removed. This information can be retrieved by FCA
US LLC, and service and repair facilities, when servicing your vehicle. This information may be used to determine if repair will be covered by New Vehicle
Limited Warranty.
There is a probability that the use of a “performance chip” will prohibit the engine from starting. In this instance, the vehicle will need to be serviced by
an authorized dealer in order to return the vehicle to it's factory settings.
When it comes to service, remember that an authorized dealer knows your Jeep® vehicle best, has factory-trained technicians and genuine MOPAR®
parts, and cares about your satisfaction.
1
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4
GETTING TO KNOW YOUR VEHICLE
REMOTE STARTING SYSTEM
This system uses the key fob to start
the engine conveniently from outside
the vehicle while still maintaining
security. The system has a range of
approximately 300 ft (91 m).
NOTE:
The vehicle must be equipped with an auto-
matic transmission to be equipped with
Remote Start.
Obstructions between the vehicle and the
key fob may reduce this range.
The Remote Start system will wait for the
“Wait To Start” yellow telltale to extinguish
before cranking the engine. This allows time
for the engine pre-heat cycle to pre-heat the
cylinder air, and is normal in cold weather.
Refer to “Warning Lights And Messages” in
“Getting To Know Your Instrument Panel” for
further information.
How To Use Remote Start
All of the following conditions must be met
before the engine will remote start:
Gear selector in PARK
Doors closed
Hood closed
Hazard switch off
Brake switch inactive (brake pedal not
pushed)
Battery at an acceptable charge level
PANIC button not pushed
Fuel meets minimum requirement
System not disabled from previous Remote
Start event
Vehicle Security Alarm not active
“Malfunction Indicator/Check Engine” tell-
tale is not illuminated
“Water In Fuel” telltale is not illuminated
“Wait To Start” telltale is not illuminated
WARNING!
Do not start or run an engine in a closed
garage or confined area. Exhaust gas
contains Carbon Monoxide (CO) which is
odorless and colorless. Carbon Monoxide is
poisonous and can cause serious injury or
death when inhaled.
Keep key fobs away from children. Opera-
tion of the Remote Start System, windows,
door locks or other controls could cause
serious injury or death.
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5
GETTING TO KNOW YOUR INSTRUMENT PANEL
INSTRUMENT CLUSTER
Diesel Base Instrument Cluster
3
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6GETTING TO KNOW YOUR INSTRUMENT PANEL
Diesel Premium Instrument Cluster
Instrument Cluster Descriptions
Base Instrument Cluster Descriptions
1. Tachometer
Indicates the engine speed in revolutions
per minute (RPM x 1000).
2. Temperature Gauge
The temperature gauge shows engine
coolant temperature. Any reading within
the normal range indicates that the
engine cooling system is operating satis-
factorily.
CAUTION!
Do not operate the engine with the
tachometer pointer in the red area. Engine
damage will occur.
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GETTING TO KNOW YOUR INSTRUMENT PANEL 7
The pointer will likely indicate a higher
temperature when driving in hot weather,
up mountain grades, or when towing a
trailer. It should not be allowed to exceed
the upper limits of the normal operating
range.
3. Instrument Cluster Display
The instrument cluster display features a
driver-interactive display. Refer to
“Instrument Cluster Display” in this
chapter for further information.
4. Fuel Gauge
The pointer shows the level of fuel in the
fuel tank when the ignition switch is in
the ON/RUN position.
 The fuel pump symbol points to the
side of the vehicle where the fuel filler
door is located.
5. Speedometer
Indicates vehicle speed.
Premium Instrument Cluster Descriptions
1. Tachometer
Indicates the engine speed in revolutions
per minute (RPM x 1000).
2. Instrument Cluster Display
The instrument cluster display features a
driver-interactive display. Refer to
“Instrument Cluster Display” in this
chapter for further information.
3. Speedometer
Indicates vehicle speed.
4. Fuel Gauge
The pointer shows the level of fuel in the
fuel tank when the ignition switch is in
the ON/RUN position.
 The fuel pump symbol points to the
side of the vehicle where the fuel filler
door is located.
5. Temperature Gauge
The temperature gauge shows engine
coolant temperature. Any reading within
the normal range indicates that the
engine cooling system is operating
satisfactorily.
The pointer will likely indicate a higher
temperature when driving in hot weather,
up mountain grades, or when towing a
WARNING!
A hot engine cooling system is dangerous.
You or others could be badly burned by steam
or boiling coolant. You may want to call an
authorized dealer for service if your vehicle
overheats.
CAUTION!
Driving with a hot engine cooling system
could damage your vehicle. If the
temperature gauge reads “H” pull over and
stop the vehicle. Idle the vehicle with the air
conditioner turned off until the pointer drops
back into the normal range. If the pointer
remains on the “H”, turn the engine off
immediately and call an authorized dealer for
service.
CAUTION!
Do not operate the engine with the
tachometer pointer in the red area. Engine
damage will occur.
3
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8GETTING TO KNOW YOUR INSTRUMENT PANEL
trailer. It should not be allowed to exceed
the upper limits of the normal operating
range.
INSTRUMENT CLUSTER DISPLAY
Your vehicle is equipped with an instrument
cluster display, which offers useful information
to the driver. With the ignition in the OFF posi-
tion, opening/closing of a door will activate the
display for viewing, and display the total miles
or kilometers in the odometer.
Diesel Displays
When the appropriate conditions exist, the
following messages display in the instrument
cluster display:
Exhaust Filter Nearing Full Safely Drive at
Highway Speeds to Clear
Exhaust Filter Full – Power Reduced See
Dealer
Exhaust System Service Required See Dealer
Exhaust System – Filter XX% Full Service
Required See Dealer
Exhaust System Regeneration in Process
Continue Driving
Exhaust System – Regeneration Completed
Engine Will Not Restart in XXXX mi DEF Low
Refill Soon
Engine Will Not Restart in XXXX mi Refill DEF
Engine Will Not Start Refill DEF
Service DEF System See Dealer
Incorrect DEF Detected See Dealer
Engine Will Not Restart in XXX mi Service DEF
See Dealer
Engine Will Not Restart Service DEF System
See Dealer
Engine Will Not Start Service DEF System See
Dealer
WARNING!
A hot engine cooling system is dangerous.
You or others could be badly burned by steam
or boiling coolant. You may want to call an
authorized dealer for service if your vehicle
overheats.
CAUTION!
Driving with a hot engine cooling system
could damage your vehicle. If the
temperature gauge reads “H” pull over and
stop the vehicle. Idle the vehicle with the air
conditioner turned off until the pointer drops
back into the normal range. If the pointer
remains on the “H”, turn the engine off
immediately and call an authorized dealer for
service.
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