warning JEEP WRANGLER RUBICON 2020 Workshop Manual

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Only use the positive battery post on the
main battery to jump start your vehicle.
Serious injury or death could result if you
attempt to jump start using the supple-
mental battery.
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.
WARNING! (Continued\f

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Use only manufacturer's recommended
brake fluid. Refer to “Fluids And Lubricants”
in “Technical Specifications” for further infor-
mation. 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 a 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.
WARNING! (Continued\f

Tire Spinning
When stuck in mud, sand, snow, or ice
conditions, do not spin your vehicle's wheels
above 30 mph (48 km/hyfRUIRUORQJHUWKDQ
30 seconds continuously without stopping.
Refer to “Freeing A Stuck Vehicle” in “In Case Of
Emergency” for further information.WARNING!

Combining radial ply tires with other types of tires
on your vehicle will cause your vehicle to handle
poorly. The instability could cause a collision.
Always use radial ply tires in sets of four. Never
combine them with other types of tires.

WARNING!

Fast spinning tires can be dangerous. Forces
generated by excessive wheel speeds may
cause tire damage or failure. A tire could
explode and injure someone. Do not spin your
vehicle's wheels faster than 30 mph (48 km/hyf
for more than 30 seconds continuously when
you are stuck, and do not let anyone near a
spinning wheel, no matter what the speed.

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Do not use a tire, wheel size, load rating, or
speed rating other than that specified for
your vehicle. Some combinations of unap-
proved tires and wheels may change suspen -
sion dimensions and performance
characteristics, resulting in changes to
steering, handling, and braking of your
vehicle. This can cause unpredictable
handling and stress to steering and suspen -
sion components. You could lose control and
have a collision resulting in serious injury or
death. Use only the tire and wheel sizes with
load ratings approved for your vehicle.
WARNING! (Continued\f

Dark Vapor Chrome, Black Satin Chrome, or
Low Gloss Clear Coat WheelsTire Chains and Traction Devices
Use of traction devices require sufficient
tire-to-body clearance. Follow these
recommendations to guard against damage.
Traction device must be of proper size for the
tire, as recommended by the traction device
manufacturer.
Install on rear tires only.
All OE equipped tire and wheel sizes are
chainable with an Autosock traction device.
See
Autosock.com for the recommended
part or model number for your OE equipped
tire size.
The use of S-class snow chains is permitted
with the use of 245/75R17 tires on size
17 x 7.5 ET44.45 wheels.
CAUTION!
If your vehicle is equipped with these
specialty wheels, DO NOT USE wheel
cleaners, abrasives, or polishing compounds.
They will permanently damage this finish and
such damage is not covered by the New
Vehicle Limited Warranty. HAND WASH ONLY
USING MILD SOAP AND WATER WITH A SOFT
CLOTH. Used on a regular basis; this is all that
is required to maintain this finish.
WARNING!

Using tires of different size and type (M+S,
SnowyfEHWZHHQIURQWDQGUHDUD[OHVFDQFDXVH
unpredictable handling. You could lose control
and have a collision.

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If operating the vehicle without carpet in
place the floor may become hot, and there
is a risk of burns.
An improperly attached, damaged, folded,
or damaged grommets may cause your
carpet to interfere with the accelerator,
brake, or clutch pedals and cause a loss of
vehicle control. To prevent SERIOUS INJURY
or DEATH: ALWAYS securely attach your
carpet using the grommets.
WARNING! (Continued\f

TEC\b 
\f SPECIFICATIONS
VE\b \fE IDENTIFICATION NUMBER
The Vehicle Identification Number (VINyfLVIRXQG
on the left front corner of the A pillar, visible
from outside of the vehicle through the
windshield.
Vehicle Identification Number

NOTE:
It is illegal to remove or alter the VIN plate.
BRAKE SYSTEM
Your vehicle is equipped with dual hydraulic
brake systems. If either of the two hydraulic
systems loses normal capability, the remaining
system will still function. However, there will
be some loss of overall braking effectiveness.
You may notice increased pedal travel during
application, greater pedal force required to slow
or stop, and potential activation of the Brake
Warning Light.

In the event power assist is lost for any reason
(i.e., repeated brake applications with the engine
offyfWKHEUDNHVZLOOVWLOOIXQFWLRQ+RZHYHUWKH
effort required to brake the vehicle will be much
greater than that required with the power system
operating.

W\b\f AND TIRE TORQUE SPECIFICATIONS
Proper lug nut/bolt torque is very important to
ensure that the wheel is properly mounted to
the vehicle. Any time a wheel has been removed
and reinstalled on the vehicle, the lug nuts/
bolts should be torqued using a properly
calibrated torque wrench using a high quality
six sided (hexyfGHHSZDOOVRFNHW.
Torque Specifications
**Use only authorized dealer recommended
lug nuts/bolts and clean or remove any dirt or
oil before tightening.
Inspect the wheel mounting surface prior to
mounting the tire and remove any corrosion or
loose particles.
Lug Nut/Bolt
Torque **Lug Nut/
Bolt SizeLug Nut/Bolt
Socket Size
130 Ft-Lbs
(176 N·myf M14 x 1.50 22 mm
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It is not possible to know or to predict all of
the possible outcomes if your vehicle’s
systems are breached. It may be possible
that vehicle systems, including safety
related systems, could be impaired or a
loss of vehicle control could occur that may
result in an accident involving serious injury
or death.
WARNING! (Continued\f
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