2018 JEEP WRANGLER brakes

SAFETY FEATURES
Anti-Lock Brake System (ABS)
The Anti-Lock Brake System (ABS) provides
increased vehicle stability and brake perfor-
mance under most braking conditions. The
system automatically prevents wheel lock,
and enhances vehicle control during braking.
The ABS performs a self-check cycle to en-
sure that the ABS is working properly each
time the vehicle is started and driven. During
this self-check, you may hear a slight clicking
sound as well as some related motor noises.
ABS is activated during braking when the
system detects one or more wheels begin to
lock. Road conditions such as ice, snow,
gravel, bumps, railroad tracks, loose debris,
or panic stops may increase the likelihood of
ABS activation(s).
You also may experience the following when
ABS activates:
• The ABS motor noise (it may continue to
run for a short time after the stop).
• The clicking sound of solenoid valves.• Brake pedal pulsations.
• A slight drop of the brake pedal at the end
of the stop.
These are all normal characteristics of ABS.
WARNING!
• The ABS contains sophisticated elec-
tronic equipment that may be suscep-
tible to interference caused by improp-
erly installed or high output radio
transmitting equipment. This interfer-
ence can cause possible loss of anti-lock
braking capability. Installation of such
equipment should be performed by
qualified professionals.
• Pumping of the Anti-Lock Brakes will
diminish their effectiveness and may
lead to a collision. Pumping makes the
stopping distance longer. Just press
firmly on your brake pedal when you
need to slow down or stop.
• The ABS cannot prevent the natural laws
of physics from acting on the vehicle,
nor can it increase braking or steering
efficiency beyond that afforded by the
WARNING!
condition of the vehicle brakes and tires
or the traction afforded.
• The ABS cannot prevent collisions, in-
cluding those resulting from excessive
speed in turns, following another vehicle
too closely, or hydroplaning.
• The capabilities of an ABS equipped
vehicle must never be exploited in a
reckless or dangerous manner that could
jeopardize the user’s safety or the safety
of others.
ABS is designed to function with the OEM
tires. Modification may result in degraded
ABS performance.
Anti-Lock Brake Warning Light
The yellow “Anti-Lock Brake Warning Light”
will turn on when the ignition is turned to the
ON/RUN mode and may stay on for as long as
four seconds.
If the “Anti-Lock Brake Warning Light” re-
mains on or comes on while driving, it indi-
cates that the anti-lock portion of the brake
system is not functioning and that service is
SAFETY
68

required. However, the conventional brake
system will continue to operate normally if
the “Brake System Warning Light” is not on.
If the “Anti-Lock Brake Warning Light” is on,
the brake system should be serviced as soon
as possible to restore the benefits of anti-lock
brakes. If the “Anti-Lock Brake Warning
Light” does not come on when the ignition is
turned to the ON/RUN mode, have the light
repaired as soon as possible.
Electronic Brake Control System
Your vehicle is equipped with an advanced
Electronic Brake Control system (EBC). This
system includes Electronic Brake Force Dis-
tribution (EBD), Brake Assist System (BAS),
Hill Start Assist (HSA), Traction Control Sys-
tem (TCS), Electronic Stability Control
(ESC), and Electronic Roll Mitigation (ERM).
These systems work together to enhance both
vehicle stability and control in various driving
conditions.
Your vehicle may also be equipped with
Trailer Sway Control (TSC) and Hill Descent
Control (HDC).
Electronic Brake Force Distribution (EBD)
This function manages the distribution of the
braking torque between the front and rear
axles by limiting braking pressure to the rear
axle. This is done to prevent overslip of the
rear wheels to avoid vehicle instability, and to
prevent the rear axle from entering ABS be-
fore the front axle.
Brake System Warning Light
The red “Brake System Warning Light” will
turn on when the ignition is turned to the
ON/RUN mode and may stay on for as long as
four seconds.
If the “Brake System Warning Light” remains
on or comes on while driving, it indicates that
the brake system is not functioning properly
and that immediate service is required. If the
“Brake System Warning Light” does not
come on when the ignition is turned to the
ON/RUN mode, have the light repaired as
soon as possible.
Brake Assist System (BAS)
The BAS is designed to optimize the vehicle’s
braking capability during emergency braking
maneuvers. The system detects an emer-
gency braking situation by sensing the rate
and amount of brake application and then
applies optimum pressure to the brakes. This
can help reduce braking distances. The BAS
complements the anti-lock brake system
(ABS). Applying the brakes very quickly re-
sults in the best BAS assistance. To receive
the benefit of the system, you must apply
continuous braking pressure during the stop-
ping sequence, (do not “pump” the brakes).
Do not reduce brake pedal pressure unless
braking is no longer desired. Once the brake
pedal is released, the BAS is deactivated.
WARNING!
The Brake Assist System (BAS) cannot
prevent the natural laws of physics from
acting on the vehicle, nor can it increase
the traction afforded by prevailing road
conditions. BAS cannot prevent collisions,
including those resulting from excessive
69

WARNING!
Many factors, such as vehicle loading,
road conditions and driving conditions,
influence the chance that wheel lift or
rollover may occur. ERM cannot prevent
all wheel lift or roll overs, especially those
that involve leaving the roadway or striking
objects or other vehicles. The capabilities
of an ERM-equipped vehicle must never
be exploited in a reckless or dangerous
manner which could jeopardize the user's
safety or the safety of others.
Trailer Sway Control (TSC)
TSC uses sensors in the vehicle to recognize
an excessively swaying trailer and will take
the appropriate actions to attempt to stop the
sway. TSC will become active automatically
once an excessively swaying trailer is recog-
nized.NOTE:
TSC cannot stop all trailers from swaying.
Always use caution when towing a trailer and
follow the trailer tongue weight recommenda-
tions. Refer to “Trailer Towing” in “Starting
And Operating” for further information.
When TSC is functioning, the “ESC
Activation/Malfunction Indicator Light” will
flash, the engine power may be reduced and
you may feel the brakes being applied to
individual wheels to attempt to stop the
trailer from swaying. TSC is disabled when
the ESC system is in the “Partial Off” or “Full
Off” modes.WARNING!
If TSC activates while driving, slow the
vehicle down, stop at the nearest safe
location, and adjust the trailer load to
eliminate trailer sway.
Hill Descent Control (HDC) — If Equipped
HDC is only intended for low speed off-road
driving. HDC maintains vehicle speed while
descending hills in off-road driving condi-
tions by applying the brakes when necessary.
The symbol indicates the status
of the Hill Descent Control
(HDC) feature. The lamp will be
on solid when HDC is armed.
HDC can only be armed when the
transfer case is in the “4WD LOW” position
and the vehicle speed is less then 30 mph
(48 km/h). If these conditions are not met
while attempting to use the HDC feature, the
HDC indicator light will flash on/off.
When enabled, HDC senses the terrain and acti-
vates when the vehicle is descending a hill. HDC
speed may be adjusted by the driver to suit the
driving conditions. The speed corresponds to the
transmission gear selected.
Gear Approximate HDC Set
Speed
1st 1 mph (1.5 km/h)
2nd 2.5 mph (4 km/h)
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76

Gear Approximate HDC Set
Speed
3rd 4 mph (6.5 km/h)
4th 5.5 mph (9 km/h)
DRIVE 7.5 mph (12 km/h)
REVERSE 1 mph (1.5 km/h)
However, the driver can override HDC opera-
tion by applying the brake to slow the vehicle
down below the HDC control speed. If more
speed is desired during HDC control, the
accelerator pedal will increase vehicle speed
in the usual manner. When either the brake or
the accelerator is released, HDC will control
the vehicle at the original set speed.
Enabling HDC
1. Shift the transfer case into 4WD LOW
range. Refer to “Four-Wheel Drive Opera-
tion” in “Starting and Operating” for fur-
ther information.
2. Push the “Hill Descent” button. The “Hill
Descent Control Indicator Light” in the
instrument cluster will turn on solid.NOTE:
• If the transfer case is not in 4WD LOW
range, the “Hill Descent Control Indica-
tor Light” will flash for five seconds and
HDC will not be enabled.
• If the ESC senses that the brakes are
overheating the “Hill Descent Control
Indicator Light” will flash for five sec-
onds and HDC will become deactivated
until the brakes have cooled.
Disabling HDC
Push the “Hill Descent” button or shift the
transfer case out of 4WD LOW range. The
“Hill Descent Control Indicator” light in the
instrument cluster will turn off.
AUXILIARY DRIVING
SYSTEMS
Tire Pressure Monitor System (TPMS)
The Tire Pressure Monitoring System (TPMS)
will warn the driver of a low tire pressure
based on the vehicle recommended cold
placard pressure.The tire pressure will vary with temperature
by about 1 psi (7.0 kPa) for every 12°F
(6.5°C). This means that when the outside
temperature decreases, the tire pressure will
decrease. Tire pressure should always be set
based on cold inflation tire pressure. This is
defined as the tire pressure after a vehicle
has not been driven for more than three
hours, or driven less than 1 mile (1.6 km)
after a three-hour period. Refer to “Tires” in
“Servicing and Maintenance” for information
on how to properly inflate the vehicle’s tires.
The tire pressure will also increase as the
vehicle is driven; this is normal and there
should be no adjustment for this increased
pressure.
The TPMS will warn the driver of a low tire
pressure if the tire pressure falls below the
low pressure warning threshold for any rea-
son, including low temperature effects, or
natural pressure loss through the tire.
The TPMS will continue to warn the driver of
low tire pressure as long as the condition
exists, and will not turn off until the tire
pressure is at or above recommended cold
placard pressure. Once the “Tire Pressure
77

Recommended Vehicle Shift Speeds
To utilize your manual transmission effi-
ciently for both fuel economy and perfor-
mance, it should be upshifted as listed inrecommended shift speed chart. Shift at the
vehicle speeds listed for acceleration. When
heavily loaded or pulling a trailer these rec-
ommended up-shift speeds may not apply.
Manual Transmission Shift Speeds in MPH (KM/H)
Engine Speeds 1 to 2 2 to 3 3 to 4 4 to 5 5 to 6
3.6LAccel. 15 (24) 24 (39) 34 (55) 47 (76) 56 (90)
Cruise 10 (16) 19 (31) 27 (43) 37 (60) 41 (66)
NOTE:
Vehicle speeds shown in the chart above are
for 2H and 4H only, vehicle speeds in 4L
would be significantly less.
Downshifting
Moving from a high gear down to a lower gear
is recommended to preserve brakes when
driving down steep hills. In addition, down-
shifting at the right time provides better ac-
celeration when you desire to resume speed.
Downshift progressively. Do not skip gears to
avoid overspeeding the engine and clutch.
WARNING!
Do not downshift for additional engine
braking on a slippery surface. The drive
wheels could lose their grip, and the ve-
hicle could skid.
CAUTION!
• Skipping gears and downshifting into
lower gears at higher vehicle speeds can
damage the engine and clutch systems,
Any attempt to shift into lower gear with
clutch pedal depressed may result dam-
age to the clutch system. Shifting into
CAUTION!
lower gear and releasing the clutch may
result in engine damage.
• When descending a hill, be very careful
to downshift one gear at a time to pre-
vent overspeeding the engine which can
cause engine damage, and/or clutch
damage, even if the clutch pedal is
pressed. If transfer case is in low range
the vehicle speeds to cause engine and
clutch damage are significantly lower.
• Failure to follow the maximum recom-
mended downshifting speeds may cause
the engine damage and/or damage the
STARTING AND OPERATING
124

WARNING!
windows, other controls, or move the
vehicle.
Key Ignition Park Interlock
This vehicle is equipped with a Key Ignition
Park Interlock which requires the transmis-
sion to be in PARK before the ignition can be
turned to the LOCK/OFF (key removal) posi-
tion. The key can only be removed from the
ignition when the ignition is in the LOCK/OFF
position, and once removed the transmission
is locked in PARK.
NOTE:
If a malfunction occurs, the system will trap
the key in the ignition to warn you that this
safety feature is inoperable. The engine can
be started and stopped but the key cannot be
removed until you obtain service.
Brake/Transmission Shift Interlock
System
This vehicle is equipped with a Brake Trans-
mission Shift Interlock System (BTSI) that
holds the transmission gear selector in PARK
unless the brakes are applied. To shift the
transmission out of PARK, the ignition must
be in the ON/RUN position (engine running or
not) and the brake pedal must be pressed.
Five-Speed Automatic Transmission — If
Equipped
The transmission gear position display (lo-
cated in the instrument cluster) indicates the
transmission gear range. You must press the
brake pedal to move the gear selector out of
PARK (refer to “Brake/Transmission Shift In-
terlock System” in this section). To drive,
move the gear selector from PARK or NEU-
TRAL to the DRIVE position.The electronically-controlled transmission
adapts its shift schedule based on driver
inputs, along with environmental and road
conditions. The transmission electronics are
self-calibrating; therefore, the first few shifts
on a new vehicle may be somewhat abrupt.
This is a normal condition, and precision
shifts will develop within a few hundred miles
(kilometers).
Only shift from DRIVE to PARK or REVERSE
when the accelerator pedal is released and
the vehicle is stopped. Be sure to keep your
foot on the brake pedal when shifting be-
tween these gears.
The transmission gear selector has only
PARK, REVERSE, NEUTRAL, and DRIVE
shift positions. Manual shifts can be made
using the Autostick shift control. Moving the
gear selector to the left or right (-/+) while in
the DRIVE position will manually select the
transmission gear and will display the current
127

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.XXXXXX
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
SERVICING AND MAINTENANCE
172

Diesel Models with Diesel Particulate Filter
(DPF)
The oil change indicator system will remind
you that it is time to take your vehicle in for
scheduled maintenance.A “CHANgE OIL” message will flash in the
instrument cluster odometer and a single
chime will sound, indicating that an oil
change is necessary.
Based on engine operation conditions, the oil
change indicator message will illuminate, thismeans that service is required for your vehicle.
Have your vehicle serviced as soon as possible,
within the next 500 miles (805 km).
Your dealer will reset the oil change indicator
message after completing the scheduled oil
change.
Maintenance Plan — Diesel
Mileage or time passed (whichever comes first)15,000
30,000
45,000
60,000
75,000
90,000
105,00
120,000
135,000
150,000
Or Months: 12 24 36 48 60 72 84 96 108 120
Or Kilometers:
24,000
48,000
72,000
96,000
120,000
144,000
168,000
192,000
216,000
240,000
Change engine oil and oil filter.(*)
Rotate tires X X X X X X X X X X
Inspect all door latches for presence of grease, reapply if
necessary.XX X X X X X X X X
If using your vehicle for any of the following: Dusty or off-
road conditions. Inspect the engine air cleaner filter, re-
place if necessary.XX X X X X X X X X
Inspect the brake linings, replace if necessary. X X X X X X X X X X
Inspect exhaust system. X X X
Visually inspect condition of: exterior bodywork, underbody
protection, pipes and hoses (exhaust - fuel system -
brakes), rubber elements (boots, sleeves, bushings, etc.).XX X X X X X X X X
SERVICING AND MAINTENANCE
176