JEEP WRANGLER 2021 Owner handbook (in English)

Using Speed Control On Hills
The transmission may downshift on hills to
maintain the vehicle set speed.
NOTE:
The Speed Control system maintains speed
up and down hills. A slight speed change on
moderate hills is normal.
On steep hills, a greater speed loss or gain
may occur so it may be preferable to drive
without Speed Control.
WARNING!
Speed Control can be dangerous where the
system cannot maintain a constant speed.
Your vehicle could go too fast for the con-
ditions, and you could lose control and
have an accident. Do not use Speed Con-
trol in heavy traffic or on roads that are
winding, icy, snow-covered or slippery.
REFUELING THE VEHICLE
Fuel Filler Cap
The fuel filler cap is located on the driver's
side of the vehicle. If the fuel filler cap is lost
or damaged, be sure the replacement cap is
the correct one for this vehicle.
WARNING!
• Never have any smoking materials lit in
or near the vehicle when the gas cap is
removed or the tank is being filled.
• Never add fuel when the engine is run-
ning. This is in violation of most state
fire regulations and may cause the MIL
to turn on.
• A fire may result if gasoline is pumped
into a portable container that is inside of
a vehicle. You could be burned. Always
place gas containers on the ground while
filling.
CAUTION!
• Damage to the fuel system or emission
control system could result from using
an improper fuel filler cap. A poorly
fitting cap could let impurities into the
fuel system. Also, a poorly fitting after-
market cap can cause the “Malfunction
Indicator Light (MIL)” to illuminate, due
to fuel vapors escaping from the system.
Fuel Filler Cap
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CAUTION!
• To avoid fuel spillage and overfilling, do
not “top off” the fuel tank after filling.
NOTE:
• When the fuel nozzle “clicks” or shuts off,
the fuel tank is full.
• Tighten the fuel filler cap about 1/4 turn
until you hear one click. This is an indica-
tion that the cap is properly tightened.
• If the fuel filler cap is not tightened prop-
erly, the MIL will come on. Be sure the cap
is tightened every time the vehicle is
refueled.
Loose Fuel Filler Cap Message
After fuel has been added, the vehicle diag-
nostic system can determine if the fuel filler
cap is possibly loose, improperly installed, or
damaged. If the system detects a malfunc-
tion, the “gASCAP” message will display in
the odometer display. Tighten the gas cap
until a "clicking" sound is heard. This is an
indication that the gas cap is properly tight-
ened. Push the odometer reset button to turn
the message off. If the problem persists, the
message will appear the next time the vehicleis started. This might indicate a damaged
cap. If the problem is detected twice in a row,
the system will turn on the MIL. Resolving
the problem will turn the MIL off.
TRAILER TOWING
Trailer Towing Weights (Maximum Trailer
Weight Ratings)
The following chart provides the maximum
trailer weight ratings towable for your given
drivetrain.
Body Style Engine Transmission Axle Ratio Max. GTW (Gross Trailer Wt.) Max. Tongue Wt. (See Note)
2–Door3.6L EngineManual 3.21/3.73 2,205 lbs (1,000 kg) 110 lbs (50 kg)
Automatic 3.21/3.73/4.10 2,205 lbs (1,000 kg) 110 lbs (50 kg)
2.8L Diesel En-
gineManual/
Automatic3.21 2,205 lbs (1,000 kg) 110 lbs (50 kg)
3.73 3,307 lbs (1,500 kg) 330 lbs (150 kg)
STARTING AND OPERATING
140

Body Style Engine Transmission Axle Ratio Max. GTW (Gross Trailer Wt.) Max. Tongue Wt. (See Note)
4–Door3.6L EngineManual/
Automatic3.21 2,205 lbs (1,000 kg) 110 lbs (50 kg)
3.73 4,409 lbs (2,000 kg) 220 lbs (100 kg)
4.10 4,409 lbs (2,000 kg) 220 lbs (100 kg)
2.8L Diesel En-
gineAutomatic3.21 2,205 lbs (1,000 kg) 110 lbs (50 kg)
3.73 4,850 lbs (2,200 kg) 242 lbs (110 kg)
Manual3.21 2,205 lbs (1,000 kg) 110 lbs (50 kg)
3.73 5,512 lbs (2,500 kg) 220 lbs (100 kg)
When towing a trailer the technically permissible laden weight may be exceeded by not more than 220 lbs (100 kg), provided that the operating
speed is restricted to 62 mph (100 km/h) or less.
NOTE:
The trailer tongue weight must be considered
as part of the combined weight of occupants
and cargo, and should never exceed the
weight referenced on the Tire and Loading
Information placard. Refer to “Tires – General
Information” in “Servicing And Mainte-
nance” for further information.
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RECREATIONAL TOWING (BEHIND MOTORHOME, ETC.)
Towing This Vehicle Behind Another Vehicle
Towing Condition Wheels OFF the Ground Four-Wheel Drive Models
Flat Tow NONESee Instructions
•
Automatic transmission in PARK.
• Manual transmission in gear
(NOT in NEUTRAL [N]).
• Transfer case in NEUTRAL (N).
• Ignition in ACC position.
• Tow in forward direction.
Dolly TowFront NOT ALLOWED
Rear NOT ALLOWED
On Trailer ALL OK
NOTE:
• When towing your vehicle, always follow applicable state and provincial laws. Contact state and provincial Highway Safety offices for additional
details.
Recreational Towing — Four-Wheel Drive
Models
NOTE:
The transfer case must be shifted into NEU-
TRAL (N), automatic transmission must be in
PARK, and manual transmission must be in
gear (NOT in NEUTRAL) for recreational
towing.
CAUTION!
• DO NOT dolly tow any 4WD vehicle.
Towing with only one set of wheels on
the ground (front or rear) will cause
severe transmission and/or transfer case
damage. Tow with all four wheels either
CAUTION!
ON the ground, or OFF the ground (using
a vehicle trailer).
• Tow only in the forward direction. Towing
this vehicle backwards can cause severe
damage to the transfer case.
STARTING AND OPERATING
142

CAUTION!
• Automatic transmissions must be
placed in PARK for recreational towing.
• Manual transmissions must be placed in
gear (not in Neutral) for recreational
towing.
• Before recreational towing, perform the
procedure outlined under “Shifting Into
NEUTRAL (N)” to be certain that the
transfer case is fully in NEUTRAL (N).
Otherwise, internal damage will result.
• Towing this vehicle in violation of the
above requirements can cause severe
transmission and/or transfer case dam-
age. Damage from improper towing is
not covered under the New Vehicle Lim-
ited Warranty.
• Do not use a bumper-mounted clamp-on
tow bar on your vehicle. The bumper
face bar will be damaged.
Shifting Into NEUTRAL (N)
Use the following procedure to prepare your
vehicle for recreational towing.
WARNING!
You or others could be injured or killed if
you leave the vehicle unattended with the
transfer case in the NEUTRAL (N) position
without first fully engaging the parking
brake. The transfer case NEUTRAL (N)
position disengages both the front and rear
driveshafts from the powertrain, and will
allow the vehicle to roll, even if the auto-
matic transmission is in PARK (or manual
transmission is in gear). The parking brake
should always be applied when the driver
is not in the vehicle.
CAUTION!
It is necessary to follow these steps to be
certain that the transfer case is fully in
NEUTRAL (N) before recreational towing
to prevent damage to internal parts.
1. Bring the vehicle to a complete stop on
level ground.
2. Press and hold the brake pedal.3. Shift the automatic transmission into
NEUTRAL or depress the clutch pedal on
a manual transmission.
4. Turn the engine OFF.
5. Shift the transfer case lever into NEU-
TRAL (N).
6. Start the engine.
7. Shift the transmission into REVERSE.
8. Release the brake pedal (and clutch pedal
on manual transmissions) for five seconds
and ensure that there is no vehicle
movement.
9. Repeat steps seven and eight with auto-
matic transmission in DRIVE or manual
transmission in first gear.
10. Turn the engine OFF and leave the igni-
tion in the unlocked ACC position.
11. Firmly apply the parking brake.
12. Shift the transmission into PARK or
place manual transmission in gear (NOT
in NEUTRAL).
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CAUTION!
Damage to the transmission may occur if
the transmission is shifted into PARK with
the transfer case in NEUTRAL (N) and the
engine running. With the transfer case in
NEUTRAL (N) ensure that the engine is
OFF before shifting the transmission into
PARK.
13. Attach the vehicle to the tow vehicle
using a suitable tow bar.
14. Release the parking brake.
15. Disconnect the negative battery cable,
and secure it away from the negative
battery post.
Shifting Out of NEUTRAL (N)
Use the following procedure to prepare your
vehicle for normal usage.
1. Bring the vehicle to a complete stop,
leaving it connected to the tow vehicle.
2. Firmly apply the parking brake.
3. Reconnect the negative battery cable.
4. Turn the ignition to the LOCK position.
5. Turn the ignition to the ON/RUN position,
but do not start the engine.
6. Press and hold the brake pedal.
7. Shift the transmission into NEUTRAL.8. Shift the transfer case lever to the desired
position.
NOTE:
When shifting the transfer case out of
NEUTRAL (N), the engine should remain
OFF to avoid gear clash.
9. Shift the automatic transmission into
PARK, or place manual transmission in
NEUTRAL.
10. Release the brake pedal.
11. Disconnect vehicle from the tow vehicle.
12. Start the engine.
13. Press and hold the brake pedal.
14. Release the parking brake.
15. Shift the transmission into gear, release
the brake pedal (and clutch pedal on
manual transmissions), and check that
the vehicle operates normally.
STARTING AND OPERATING
144

IN CASE OF EMERGENCY
HAZARD WARNING
FLASHERS................146
BULB REPLACEMENT........146
Replacement Bulbs............146
Bulb Replacement.............147
FUSES...................149
General Information.............150
Totally Integrated Power Module.....150
JACKING AND TIRE
CHANGING................154
Jack/Spare Tire Stowage..........154
Preparations For Jacking.........154
Jacking Instructions............155
Declaration Of Conformance.......157
Jack Usage Precautions..........160
JUMP STARTING............160
Preparations For Jump Start........161
Jump Starting Procedure..........162
IF YOUR ENGINE OVERHEATS . .163GEAR SELECTOR OVERRIDE . . .164
FREEING A STUCK VEHICLE . . .164
TOWING A DISABLED
VEHICLE..................165
Without The Ignition Key..........166
Four–Wheel Drive Models.........166
Tow Eye Usage................167
ENHANCED ACCIDENT RESPONSE
SYSTEM (EARS).............168
EVENT DATA RECORDER
(EDR)....................168
IN CASE OF EMERGENCY
145

HAZARD WARNING
FLASHERS
The Hazard Warning flasher switch is located
on the instrument panel below the climate
controls.
Push the switch to turn on the
Hazard Warning flasher. When the
switch is activated, all directionalturn signals will flash on and off to warn
oncoming traffic of an emergency. Push the
switch a second time to turn off the Hazard
Warning flashers.
This is an emergency warning system and it
should not be used when the vehicle is in
motion. Use it when your vehicle is disabled
and it is creating a safety hazard for other
motorists.When you must leave the vehicle to seek
assistance, the Hazard Warning flashers will
continue to operate even though the ignition
is placed in the OFF position.
NOTE:
With extended use the Hazard Warning flash-
ers may wear down your battery.
BULB REPLACEMENT
Replacement Bulbs
Interior Lights
Bulb Type
Bulb Number
Automatic Transmission Indicator Lamp 658
Courtesy Lights, Under Dash (1)906
Heater Control Lamps (2)194
Rocker Switch Indicator Lamp (Rear Window Defogger) **
Soundbar Dome Lamp912
** Bulbs only available from authorized dealer.
IN CASE OF EMERGENCY
146

Exterior Lights
Bulb Type
Bulb Number
Backup Lamps (2)W16W
Center High-Mounted Stop Lamp (1) L.E.D. (Serviced At Authorized Dealer)
Front Fog Lamps (2)PSX24W
Rear Fog Lamps (2)P27/7W
Front Direction Lamps (2)PY27/7W
Front Side Repeaters/Side Marker Lamps (2) W5W
Headlamps (2)H4
Front Position Lamps (2)12V14W
Stop/Rear Position Lamps (2)P27/7W
Rear Direction Lamps (2)PY27/7W
License Lamp (2)W5W
NOTE:
Numbers refer to commercial bulb types that can be purchased from your local authorized dealer.
Bulb Replacement
NOTE:
Lens fogging can occur under certain atmo-
spheric conditions. This will usually clear as
atmospheric conditions change to allow the
condensation to change back into a vapor.
Turning the lamps on will usually accelerate
the clearing process.
Headlamp
1. Open hood and support using prop rod.
2. Remove the front grille. Turn the retainers
along the top 1/4 turn counterclockwise
and remove.
3. Pull the bottom of the grille away starting
at one side and working toward the other.4. Turn both park and turn signal socket
assemblies 1/4 turn counterclockwise and
remove.
5. Remove the four screws holding the metal
retaining ring.
6. Remove the lamp from the collar.
7. Grasp the bulb and turn 1/4 turn
counterclockwise.
147

8. Pull the bulb from the housing.
9. Push connector locking tab to the unlock
position.
10. Remove connector from bulb.
11. Push connector onto new bulb base, and
push the connector locking tab to the
lock position.
CAUTION!
Do not touch the new bulb with your fin-
gers. Oil contamination will severely
shorten bulb life. If the bulb comes in
contact with any oily surface, clean the
bulb with rubbing alcohol.
12. Reinstall bulb housing. Rotate the bulb
1/4 turn clockwise.
Front Park/Turn Signal
1. Remove the front grille. Turn the retainers
along the top 1/4 turn counterclockwise
and remove.
2. Pull the bottom of the grille away starting
at one side and working toward the other.3. Turn the socket assembly 1/4 turn coun-
terclockwise and remove from housing.
Pull the bulb straight from the socket to
replace.
Front Side Marker
1. Reach under the front fender flare and
locate the front side marker socket.
2. Turn the socket assembly counterclock-
wise 1/3 turn and remove it from the
housing. Pull the bulb straight from the
socket to replace.
Front Fog Lamp
1. Reach under the vehicle to access the
back of the front fog lamp.
2. Disconnect the wire harness connector
from the front fog lamp connector
receptacle.
3. Firmly grasp the bulb by the two latch
features and squeeze them together to
unlock the bulb from the back of the front
fog lamp housing.4. Pull the bulb straight out from the keyed
opening in the housing and then connect
the replacement bulb.
CAUTION!
Do not touch the new bulb with your fin-
gers. Oil contamination will severely
shorten bulb life. If the bulb comes in
contact with any oily surface, clean the
bulb with rubbing alcohol.
Rear Fog Lamp
1. Reach under the vehicle to access the
back of the rear fog lamp.
2. Turn the socket assembly counterclock-
wise 1/4 turn and remove it from the
housing. Pull the bulb straight from the
socket to replace.IN CASE OF EMERGENCY
148