ESP JEEP CHEROKEE 2015 KL / 5.G Workshop Manual

time expires, the system will release brake pressure and
the vehicle will roll down the hill as normal. The system
will release brake pressure in proportion to amount of
throttle applied.
The following conditions must be met in order for HSA to
activate:
•The vehicle must be stopped.
•The vehicle must be on a 7% (approximate) grade or
greater hill.
•The gear selection must match vehicle uphill direction
(i.e., vehicle facing uphill is in forward gear; vehicle
backing uphill is in REVERSE gear).
•For vehicles equipped with an automatic transmission,
the HSA will work in REVERSE gear and all forward
gears. The system will not activate if the transmission
is in PARK.
WARNING!
There may be situations where the Hill Start Assist
(HSA) will not activate and slight rolling may occur,
such as on minor hills or with a loaded vehicle, or
while pulling a trailer. HSA is not a substitute for
active driving involvement. It is always the driver ’s
responsibility to be attentive to distance to other
vehicles, people, and objects, and most importantly
brake operation to ensure safe operation of the ve-
hicle under all road conditions. Your complete atten-
tion is always required while driving to maintain
safe control of your vehicle. Failure to follow these
warnings can result in a collision or serious personal
injury.
524 STARTING AND OPERATING

Activating HDC
Once HDC is enabled it will activate automatically if
driven down a grade of sufficient magnitude (greater
than approximately 8%). The set speed for HDC is
selectable by the driver, and can be adjusted by using the
gear shift lever. The following summarizes the HDC set
speeds:
•P = No set speed. HDC may be enabled but will not
activate
•R = 0.6 mph (1 km/h)
•N = 1.2 mph (2 km/h)
•D = 0.6 mph (1 km/h)
•1st = 0.6 mph (1 km/h)
•2nd = 1.2 mph (2 km/h)
•3rd = 1.8 mph (3 km/h)
•4th = 2.5 mph (4 km/h)
•5th = 3.1 mph (5 km/h)
•6th = 3.7 mph (6 km/h)
•7th = 4.3 mph (7 km/h)
•8th = 5.0 mph (8 km/h)
•9th = 5.6 mph (9 km/h)
NOTE:
•During HDC the ERS +/- shifter input is used for HDC
target speed selection but will not affect the gear
chosen by the transmission. During HDC the transmis-
sion will shift appropriately for the driver-selected set
speed and corresponding driving conditions.
•HDC performance is influenced by the Terrain Select
mode. This difference may be notable to the driver and
may be perceived as a varying level of aggressiveness.
5
STARTING AND OPERATING 527

Feedback to the driver:
The instrument cluster has an HDC icon and the HDC
switch has an LED which offer feedback to the driver
about the state HDC is in.
•The cluster icon and switch lamp will illuminate and
remain on solid when HDC is enabled or activated.
This is the normal operating condition for HDC.
•The cluster icon and switch lamp will flash for several
seconds then extinguish when the driver presses the
HDC switch but enable conditions are not met.
•The cluster icon and switch lamp will flash for several
seconds then extinguish when HDC deactivates due to
excess speed.
•The cluster icon and switch lamp will flash when HDC
deactivates due to overheated brakes. The flashing will
stop and HDC will activate again once the brakes have
cooled sufficiently.
The Hill Descent Switch is located within the Selec-
Terrain knob in the upper right position.
WARNING!
HDC is only intended to assist the driver in control-
ling vehicle speed when descending hills. The driver
must remain attentive to the driving conditions and
is responsible for maintaining a safe vehicle speed.
5
STARTING AND OPERATING 529

NOTE:These SSC default set speeds are dependent on
hill grade. That is the steeper the grade of the hill the
vehicle travels on the lower the values of the set speed
will be for all listed gears, with the minimal value being
.6 mph (1 km/h).
NOTE:
•During SSC the ERS +/- shifter input is used for SSC
target speed selection but will not affect the gear
chosen by the transmission. During SSC the transmis-
sion will shift appropriately for the driver-selected set
speed and corresponding driving conditions.
•SSC performance is influenced by the Terrain Select
mode. This difference may be notable to the driver and
may be perceived as a varying level of aggressiveness.
Driver Override:
The driver may override SSC activation with throttle or
brake application at any time.
Deactivating SSC
SSC will be deactivated but remain available if any of the
following conditions occur:
•Driver overrides SSC set speed with throttle or brake
application.
•Vehicle speed exceeds 20 mph (32 km/h) but remains
below 40 mph (64 km/h).
•Vehicle is shifted to park.
Disabling SSC
SSC will deactivate and be disabled if any of the follow-
ing conditions occur:
•The driver presses the SSC switch.
•The driveline is shifted out of 4WD Low Range.
•The parking brake is applied.
•Driver door opens.
532 STARTING AND OPERATING

•The vehicle is driven greater than 20 mph (32 km/h)
for greater than 70 seconds.
•The vehicle is driven greater than 40 mph (64 km/h)
(SSC exits immediately).
Feedback To The Driver:
The instrument cluster has an SSC icon and the SSC
switch has an LED which offer feedback to the driver
about the state SSC is in.
•The cluster icon and switch lamp will illuminate and
remain on solid when SSC is enabled or activated. This
is the normal operating condition for SSC.
•The cluster icon and switch lamp will flash for several
seconds then extinguish when the driver presses the
SSC switch but enable conditions are not met.
•The cluster icon and switch lamp will flash for several
seconds then extinguish when SSC deactivates due to
excess speed.
•The cluster icon and switch lamp will flash then
extinguish when SSC deactivates due to overheated
brakes.
WARNING!
SSC is only intended to assist the driver in control-
ling vehicle speed when driving in off road condi-
tions. The driver must remain attentive to the driving
conditions and is responsible for maintaining a safe
vehicle speed.
Electronic Stability Control (ESC)
This system enhances directional control and stability of
the vehicle under various driving conditions. ESC cor-
rects for oversteering or understeering of the vehicle by
applying the brake of the appropriate wheel to assist in
counteracting the oversteer or understeer condition. En-
gine power may also be reduced to help the vehicle
maintain the desired path.
5
STARTING AND OPERATING 533

Ready Alert Braking (RAB)
Ready Alert Braking may reduce the time required to
reach full braking during emergency braking situations.
It anticipates when an emergency braking situation may
occur by monitoring how fast the throttle is released by
the driver. When the throttle is released very quickly,
Ready Alert Braking applies a small amount of brake
pressure. This brake pressure will not be noticed by the
driver. The brake system uses this brake pressure to allow
a fast brake response if the driver applies the brakes.
Rain Brake Support (RBS)
Rain Brake Support may improve braking performance
in wet conditions. It will periodically apply a small
amount of brake pressure to remove any water buildup
on the front brake rotors. It is triggered by the windshield
wiper setting and only functions when they are in use.
When Rainy Brake Support is active, there is no notifica-
tion to the driver and no driver interaction is required.
TIRE SAFETY INFORMATION
Tire Markings
1—U.S.DOTSafetyStandardsCode (TIN)4—MaximumLoad
2 — Size Designation 5 — Maximum Pressure3 — Service Description 6 — Treadwear, Traction andTemperature Grades
540 STARTING AND OPERATING

EXAMPLE:
R= Construction code
–#R#means radial construction, or
–#D#means diagonal or bias construction
15, 16, 18= Rim diameter in inches (in)
Service Description:
95= Load Index
– A numerical code associated with the maximum load a tire can carry
H= Speed Symbol
– A symbol indicating the range of speeds at which a tire can carry a load corresponding to
its load index under certain operating conditions
– The maximum speed corresponding to the speed symbol should only be achieved under
specified operating conditions (i.e., tire pressure, vehicle loading, road conditions, and
posted speed limits)
5
STARTING AND OPERATING 543

WARNING!(Continued)
•Unequal tire pressures from one side of the vehicle
to the other can cause the vehicle to drift to the
right or left.
•Always drive with each tire inflated to the recom-
mended cold tire inflation pressure.
Both under-inflation and over-inflation affect the stability
of the vehicle and can produce a feeling of sluggish
response or over responsiveness in the steering.
NOTE:
•Unequal tire pressures from side to side may cause
erratic and unpredictable steering response.
•Unequal tire pressure from side to side may cause the
vehicle to drift left or right.
Economy
Under-inflated tires will increase tire rolling resistance
resulting in higher fuel consumption.
Tread Wear
Improper cold tire inflation pressures can cause abnor-
mal wear patterns and reduced tread life, resulting in the
need for earlier tire replacement.
Ride Comfort And Vehicle Stability
Proper tire inflation contributes to a comfortable ride.
Over-inflation produces a jarring and uncomfortable
ride.
Tire Inflation Pressures
The proper cold tire inflation pressure is listed on the
driver’s side B-Pillar or rear edge of the driver’s side
door.
5
STARTING AND OPERATING 553

At least once a month:
•Check and adjust tire pressure with a good quality
pocket-type pressure gauge. Do not make a visual
judgement when determining proper inflation. Tires
may look properly inflated even when they are under-
inflated.
•Inspect tires for signs of tire wear or visible damage.
CAUTION!
After inspecting or adjusting the tire pressure, al-
ways reinstall the valve stem cap. This will prevent
moisture and dirt from entering the valve stem,
which could damage the valve stem.
Inflation pressures specified on the placard are always
“cold tire inflation pressure.” Cold tire inflation pressure
is defined as the tire pressure after the vehicle has not
been driven for at least three hours, or driven less than 1
mile (1.6 km) after sitting for a minimum of three hours.
The cold tire inflation pressure must not exceed the
maximum inflation pressure molded into the tire side-
wall.
Check tire pressures more often if subject to a wide range
of outdoor temperatures, as tire pressures vary with
temperature changes.
Tire pressures change by approximately 1 psi (7 kPa) per
12°F (7°C) of air temperature change. Keep this in mind
when checking tire pressure inside a garage, especially in
the winter.
Example: If garage temperature = 68°F (20°C) and the
outside temperature = 32°F (0°C) then the cold tire
inflation pressure should be increased by 3 psi (21 kPa),
which equals 1 psi (7 kPa) for every 12°F (7°C) for this
outside temperature condition.
554 STARTING AND OPERATING

CAUTION!
To avoid damage to your vehicle or tires, observe the
following precautions:
•Because of restricted traction device clearance be-
tween tires and other suspension components, it is
important that only traction devices in good condi-
tion are used. Broken devices can cause serious
damage. Stop the vehicle immediately if noise
occurs that could indicate device breakage. Remove
the damaged parts of the device before further use.
•Install device as tightly as possible and then re-
tighten after driving about½mile (0.8 km).
•Do not exceed 30 mph (48 km/h).
•Drive cautiously and avoid severe turns and large
bumps, especially with a loaded vehicle.
•Do not drive for a prolonged period on dry pave-
ment.
(Continued)
CAUTION!(Continued)
•Observe the traction device manufacturer ’s instruc-
tions on the method of installation, operating
speed, and conditions for use. Always use the
suggested operating speed of the device manufac-
turer ’s if it is less than 30 mph (48 km/h).
•Do not use traction devices on a compact spare tire.
TIRE ROTATION RECOMMENDATIONS
The tires on the front and rear of your vehicle operate at
different loads and perform different steering, handling,
and braking functions. For these reasons, they wear at
unequal rates.
These effects can be reduced by timely rotation of tires.
The benefits of rotation are especially worthwhile with
aggressive tread designs such as those on On/Off Road
566 STARTING AND OPERATING