suspension JEEP WRANGLER 2DOORS 2018 Owner handbook (in English)

WARNING!
• Electronic Stability Control (ESC) can-
not prevent the natural laws of physics
from acting on the vehicle, nor can it
increase the traction afforded by prevail-
ing road conditions. ESC cannot prevent
accidents, including those resulting
from excessive speed in turns, driving on
very slippery surfaces, or hydroplaning.
ESC also cannot prevent accidents re-
sulting from loss of vehicle control due
to inappropriate driver input for the con-
ditions. Only a safe, attentive, and skill-
ful driver can prevent accidents. The
capabilities of an ESC equipped vehicle
must never be exploited in a reckless or
dangerous manner which could jeopar-
dize the user’s safety or the safety of
others.
• Vehicle modifications, or failure to prop-
erly maintain your vehicle, may change
the handling characteristics of your ve-
hicle, and may negatively affect the per-
formance of the ESC system. Changes to
the steering system, suspension, brak-
WARNING!
ing system, tire type and size or wheel
size may adversely affect ESC perfor-
mance. Improperly inflated and un-
evenly worn tires may also degrade ESC
performance. Any vehicle modification
or poor vehicle maintenance that re-
duces the effectiveness of the ESC sys-
tem can increase the risk of loss of
vehicle control, vehicle rollover, per-
sonal injury and death.
ESC Operating Modes
NOTE:
Depending upon model and mode of opera-
tion, the ESC system may have multiple op-
erating modes.
ESC On
This is the normal operating mode for the
ESC. Whenever the vehicle is started, the
ESC system will be in this mode. This modeshould be used for most driving conditions.
Alternate ESC modes should only be used for
specific reasons as noted in the following
paragraphs.
Partial Off
The “Partial Off” mode is intended for times
when a more spirited driving experience is
desired. This mode may modify TCS and ESC
thresholds for activation, which allows for
more wheel spin than normally allowed. This
mode may be useful if the vehicle becomes
stuck.
To enter the “Partial Off” mode, momentarily
push the “ESC Off” switch and the “ESC Off
Indicator Light” will illuminate. To turn the
ESC on again, momentarily push the “ESC
Off” switch and the “ESC Off Indicator Light”
will turn off.
NOTE:
For vehicles with multiple partial ESC modes
a momentary button push will toggle the ESC
mode. Multiple momentary button pushed
may be required to return to ESC On.
SAFETY
86

Axle Lock (Tru-Lok) — Rubicon Models
The AXLE LOCK switch is located on the
instrument panel (to the right of the steering
column).
This feature will only activate when the fol-
lowing conditions are met:
• Ignition in RUN position, vehicle in 4L
(Low) range.
• Vehicle speed should be 10 mph (16 km/h)
or less.• Both right and left wheels on axle are at the
same speed.
To activate the system, push the AXLE LOCK
switch down to lock the rear axle only (the
“REAR ONLY” will illuminate), push the
switch up to lock the front axle and rear axle
(the “FRONT + REAR” will illuminate). When
the rear axle is locked, pushing the bottom of
switch again will lock or unlock the front axle.
NOTE:
The indicator lights will flash until the axles
are fully locked or unlocked.
To unlock the axles, push the AXLE LOCK
OFF button.
Axle lock will disengage if the vehicle is taken
out of 4L (Low) range, or the ignition switch is
turned to the OFF position.
The axle lock disengages at speeds above
30 mph (48 km/h), and will automatically
re-lock once vehicle speed is less than
10 mph (16 km/h).
Electronic Sway Bar Disconnect — If
Equipped
Your vehicle may be equipped with an elec-
tronic disconnecting stabilizer/sway bar. This
system allows greater front suspension travel
in off-road situations.
This system is controlled by the SWAY BAR
switch located on the instrument panel (to
the right of the steering column).
Axle Lock Switch Panel
Sway Bar Switch
STARTING AND OPERATING
156

Push the SWAY BAR switch to activate the
system. Push the switch again to deactivate
the system. The “Sway Bar Indicator Light”
(located in the instrument cluster) will illumi-
nate when the bar is disconnected. The
“Sway Bar Indicator Light” will flash during
activation transition, or when activation con-
ditions are not met. The stabilizer/sway bar
should remain in on-road mode during nor-
mal driving conditions.
WARNING!
Ensure the stabilizer/sway bar is recon-
nected before driving on hard surfaced
roads or at speeds above 18 mph
(29 km/h); a disconnected stabilizer/sway
bar may contribute to the loss of vehicle
control, which could result in serious in-
jury. Under certain circumstances, the
front stabilizer/sway bar enhances vehicle
stability and assists with vehicle control.
The system monitors vehicle speed and
will attempt to reconnect the stabilizer/
sway bar at speeds over 18 mph
(29 km/h). This is indicated by a flashing
or solid “Sway Bar Indicator Light.” Once
WARNING!
vehicle speed is reduced below 14 mph
(22 km/h), the system will once again
attempt to return to off-road mode.
To disconnect the stabilizer/sway bar, shift to
either 4H or 4L and push the SWAY BAR
switch to obtain the off-road position. Refer
to “Four-Wheel Drive Operation” in this sec-
tion for further information. The “Sway Bar
Indicator Light” will flash until the stabilizer/
sway bar has been fully disconnected.
NOTE:
The stabilizer/sway bar may be torque locked
due to left and right suspension height differ-
ences. This condition is due to driving sur-
face differences or vehicle loading. In order
for the stabilizer/sway bar to disconnect/
reconnect, the right and left halves of the bar
must be aligned. This alignment may require
that the vehicle be driven onto level ground or
rocked from side to side.
To return to on-road mode, push the SWAY
BAR switch again.
WARNING!
If the stabilizer/sway bar will not return to
on-road mode, the “Sway Bar Indicator
Light” will flash in the instrument cluster
and vehicle stability may be reduced. Do
not attempt to drive the vehicle over
18 mph (29 km/h). Driving faster than
18 mph (29 km/h) with a disconnected
stabilizer/sway bar may contribute to the
loss of vehicle control, which could result
in serious injury.
STOP/START SYSTEM —
AUTOMATIC
TRANSMISSION (IF
EQUIPPED)
The Stop/Start function is developed to re-
duce fuel consumption. The system will stop
the engine automatically during a vehicle
stop if the required conditions are met. Re-
leasing the brake pedal or pressing the accel-
erator pedal will automatically re-start the
engine.
157

If the vehicle's battery is discharged, refer to
"Manual Park Release" in this section for
instructions on shifting the automatic trans-
mission out of PARK in order to move the
vehicle.
CAUTION!
• Do not use sling type equipment when
towing. Vehicle damage may occur.
• When securing the vehicle to a flatbed
truck, do not attach to front or rear
suspension components. Damage to
your vehicle may result from improper
towing.
• If the vehicle being towed requires steer-
ing, the ignition switch must be in the
ACC or ON/RUN mode, not in the OFF
mode.
Without The Key Fob
Special care must be taken when the vehicle
is towed with the ignition in the OFF mode.
The only approved method of towing without
the key fob 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 wheelsOFFthe ground. Acceptable meth-
ods 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, withALL
wheels on the ground),IFthe transfer case is
inNEUTRAL(N) and the transmission is in
PARK. Refer to “Recreational Towing” in
“Starting And Operating” for detailed
instructions.
CAUTION!
• Front or rear wheel lifts must not be used
(if the remaining wheels are on the
ground). Internal damage to the trans-
mission or transfer case will occur if a
front or rear wheel lift is used when
towing.
• Towing this vehicle in violation of the
above requirements can cause severe
transmission and/or transfer case dam-
CAUTION!
age. Damage from improper towing is
not covered under the New Vehicle Lim-
ited Warranty.
Tow Eye Usage
Your vehicle is equipped with a tow eye that
can be used to move a disabled vehicle.
When using a tow eye be sure to follow the
“Tow Eye Usage Precautions” and the “Tow-
ing A Disabled Vehicle” instructions in this
section.
The tow eyes are mounted below the front and
rear bumpers.
Tow Eye Usage Precautions
WARNING!
Stand clear of vehicles when pulling with
tow eyes.
• Do not use a chain with a tow eye.
Chains may break, causing serious injury
or death.
203

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
Visually inspect condition of:
exterior bodywork, underbody
protection, pipes and hoses (ex-
haust - fuel system - brakes),
rubber elements (boots, sleeves,
bushings, etc.).XXX X X X X X X X
Inspect the front suspension, tie
rod ends and boot seals, replace
if necessary.XX X X X X
Inspect the front and rear axle
fluid, change if using your ve-
hicle for police, taxi, fleet, of-
froad or frequent trailer towing.XX X X X
Inspect the transfer case fluid. X X X
Inspect the CV/Universal joints. X X X X X X X X X X
Change brake fluid every
24 months if using DOT 4 brake
fluid. ***XXX X X X X X X X
Adjust parking brake on vehicles
equipped with four-wheel disc
brakes.XX X X X
Replace engine air cleaner filter. X X X X X
211

Mileage or time passed (whichever comes first)12,500
25,000
37,500
50,000
62,500
75,000
87,500
100,000
112,500
125,000
137,500
150,000
162,500
175,000
187,500
Or Years: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Or Kilometers:
20,000
40,000
60,000
80,000
100,000
120,000
140,000
160,000
180,000
200,000
220,000
240,000
260,000
280,000
300,000
Additional Inspections
Change the engine oil and engine oil filter.(*)
Inspect the CV joints. X X X X X X X
Inspect front suspension, boot seals, tie rod ends, and replace if
necessary.XXX X X X X
Visually inspect condition of: exterior bodywork, underbody pro-
tection, pipes and hoses (exhaust - fuel system - brakes), rubber
elements (boots, sleeves, bushings, etc.).XXX X X X X
If using your vehicle in dusty or off-road conditions, inspect the
air cleaner filter, and replace if necessary.XXXXXXX XXX X X X X X
Inspect the brake linings, parking brake function. X X X X X X X
Check and, if necessary, top up fluid levels. (°) X X X X X X X X X X X X X X X
Additional Maintenance
Replace engine air cleaner filter. X X X X X X X
Replace air conditioning/cabin air filter. X X X X X X X
Change brake fluid every 24 months if using DOT 4 brake fluid.
(**)XXX X X X X
Replace the engine fuel filter. X X X X X X X
Inspect accessory drive and timing belt. X X X
Replace accessory drive belt. (***) X X
215

your tire. The Load Index and Speed Symbol
for your tire will be found on the original
equipment tire sidewall.
It is recommended to replace the two front
tires or two rear tires as a pair. Replacing just
one tire can seriously affect your vehicle’s
handling. If you ever replace a wheel, make
sure that the wheel’s specifications match
those of the original wheels.
It is recommended you contact an authorized
tire dealer or original equipment dealer with
any questions you may have on tire specifi-
cations or capability. Failure to use equiva-
lent replacement tires may adversely affect
the safety, handling, and ride of your vehicle.
WARNING!
• Do not use a tire, wheel size, load rating,
or speed rating other than that specified
for your vehicle. Some combinations of
unapproved tires and wheels may
change suspension dimensions and per-
formance characteristics, resulting in
changes to steering, handling, and brak-
ing of your vehicle. This can cause un-
WARNING!
predictable handling and stress to steer-
ing and suspension 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.
• Never use a tire with a smaller load index
or capacity, other than what was origi-
nally equipped on your vehicle. Using a
tire with a smaller load index could re-
sult in tire overloading and failure. You
could lose control and have a collision.
• Failure to equip your vehicle with tires
having adequate speed capability can
result in sudden tire failure and loss of
vehicle control.
CAUTION!
Replacing original tires with tires of a
different size may result in false speedom-
eter and odometer readings.
Tire Types
All Season Tires — If Equipped
All Season tires provide traction for all sea-
sons (Spring, Summer, Fall, and Winter).
Traction levels may vary between different all
season tires. All season tires can be identi-
fied by the M+S, M&S, M/S or MS designa-
tion on the tire sidewall. Use all season tires
only in sets of four; failure to do so may
adversely affect the safety and handling of
your vehicle.
Summer Or Three Season Tires — If
Equipped
Summer tires provide traction in both wet
and dry conditions, and are not intended to
be driven in snow or on ice. If your vehicle is
equipped with Summer tires, be aware these
tires are not designed for Winter or cold
driving conditions. Install Winter tires on your
vehicle when ambient temperatures are less
than 40°F (5°C) or if roads are covered with
ice or snow. For more information, contact an
authorized dealer.
Summer tires do not contain the all season
designation or mountain/snowflake symbol
SERVICING AND MAINTENANCE
234