2015 JEEP CHEROKEE 4WD

Selec Speed Control (SSC) — If Equipped
SSC is intended for off road driving in 4WD Low Range
only. SSC maintains vehicle speed by actively controlling
engine torque and brakes.
SSC has three states:
1. Off (feature is not enabled and will not activate)
2. Enabled (feature is enabled and ready but activation
conditions are not met, or driver is actively overriding
with brake or throttle application)
3. Active (feature is enabled and actively controlling
vehicle speed)
Enabling SSC
SSC is enabled by pressing the SSC switch, but the
following conditions must also be met to enable SSC:
•Driveline is in 4WD Low Range
•Vehicle speed is below 5 mph (8 km/h)
•Parking brake is released
•Driver door is closed
•Driver is not applying throttle
Selec Speed Control Switch
530 STARTING AND OPERATING

Activating SSC
Once SSC is enabled it will activate automatically once
the following conditions are met:
•Driver releases throttle
•Driver releases brake
•Transmission is in any selection other than P
•Vehicle speed is below 20 mph (32 km/h)
The set speed for SSC is selectable by the driver, and can
be adjusted by using the gear shift lever. Additionally, the
SSC set speed is automatically reduced when climbing a
grade and the level of set speed reduction depends on the
magnitude of grade. The following summarizes the SSC
set speeds:
4WD Low Range Set Speeds
•1st = .6 mph (1 km/h)
•2nd = 1.2 mph (2 km/h)
•3rd = 4 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 mph (8 km/h)
•9th = 5.6 mph (9 km/h)
•REVERSE = .6 mph (1 km/h)
•NEUTRAL = 1.2 mph (2 km/h)
•PARK = SSC remains enabled but not active
5
STARTING AND OPERATING 531

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

ESC Operating Modes
Depending upon model and mode of operation, the ESC
system has up to three operating modes: “ESC On”
“Partial Off,” and “Full Off.”
ESC On — Two-Wheel Drive Vehicles And Four-Wheel
Drive Vehicles In 2WD And 4WD High Range
This is the normal operating mode for ESC when oper-
ating a two-wheel drive vehicle. It is also the normal
mode for operating a four-wheel drive vehicle in 2WD or
4WD HIGH range. The ESC system will be in “ESC On”
mode whenever the vehicle is started or the power
transfer unit (if equipped) is shifted out of 4WD LOW
range. This mode should be used for most driving
situations. ESC should only be turned to “Partial Off” or
“Full Off” for specific reasons as noted. Refer to “Partial
Off” and to “Full Off” for additional information.
Partial Off — Two-Wheel Drive Vehicles And Four-
Wheel Drive Vehicles In 2WD And 4WD High Range
The “Partial Off” mode is intended for driving in deep
snow, sand, or gravel. This mode raises the threshold for
TCS and ESC activation, which allows for more wheel
spin than what ESC normally allows.
The “ESC Off” button is located in the lower switch bank
above the climate control. To enter the “Partial Off”
mode, momentarily press the “ESC Off” button and the
#ESC Off#indicator light will illuminate. To turn the ESC
on again, momentarily press the#ESC OFF#button and
the#ESC Off#indicator light will turn off. This will restore
the normal “ESC On” mode of operation.
5
STARTING AND OPERATING 535

WARNING!
•When in “Partial Off” mode, the TCS functionality
of ESC, (except for the limited slip feature de-
scribed in the TCS section), has been disabled and
the “ESC Off Indicator Light” will be illuminated.
When in “Partial Off” mode, the engine power
reduction feature of TCS is disabled, and the
enhanced vehicle stability offered by the ESC sys-
tem is reduced.
•Trailer Sway Control (TSC) is disabled when the
ESC system is in the%Partial Off%mode.
NOTE:To improve the vehicle’s traction when driving
with snow chains, or when starting off in deep snow,
sand, or gravel, it may be desirable to switch to the
“Partial Off” mode by momentarily pressing the “ESC
Off” button. Once the situation requiring “Partial Off”
mode is overcome, turn ESC back on by momentarily
pressing the “ESC Off” button. This may be done while
the vehicle is in motion.
Full Off — Four-Wheel Drive Vehicles In 4WD High
And 4WD Low Range
The “Full Off” mode is intended for off-highway and
off-road use when ESC stability features could inhibit
vehicle maneuverability due to trail conditions.
The “ESC Off” button is located in the lower switch bank
above the climate control panel. To enter “Full Off”
mode, press and hold the “ESC Off” button for five
seconds while the vehicle is stopped with the engine
536 STARTING AND OPERATING

running. After five seconds, the#ESC Off#indicator light
will illuminate and an “ESC Off” message will appear in
the odometer.
In this mode, ESC and TCS are turned off (except for the
“limited slip” feature described in the TCS section) until
the vehicle reaches a speed of 40 mph (64 km/h). At
speeds over 40 mph (64 km/h), the system automatically
switches to “Partial Off” mode, described above. When
the vehicle speed returns to less than 35 mph (56 km/h),
the ESC system will return to “Full Off” mode. The#ESC
OFF#indicator light is always illuminated when ESC is
off. To turn ESC on again, momentarily press the “ESC
Off” button. This will restore the normal “ESC On” mode
of operation.
WARNING!
With the ESC switched off, the enhanced vehicle
stability offered by ESC is unavailable. In an emer-
gency evasive maneuver, the ESC system will not
engage to assist in maintaining stability. “Full Off”
mode is only intended for off-highway or off-road
use.
NOTE:
•“Full Off” is the only operating mode for ESC in 4WD
LOW range. The ESC system will be in this mode
whenever the vehicle is started in 4WD LOW range or the
power transfer unit is shifted into 4WD LOW range.
•The “ESC OFF” message will display and a chime will
sound when the shift lever is moved from any position
5
STARTING AND OPERATING 537

Four Wheel Drive (4WD) Non-Trailhawk Models with-
out a Two-Speed Power Takeoff Unit
•Original equipment 225/65R17 and 225/60R18 tire
sizes are not chainable.
•The use of 9mm snow chains is permitted with the use
of 215/60R17 tires on size 17 x 7.0 ET41 wheels.
Four Wheel Drive (4WD) Non-Trailhawk Models with a
Two-Speed Power Takeoff Unit
•The use of 7mm snow chains is permitted with 225/
65R17 and 225/60R18 tires.
Four Wheel Drive (4WD) Trailhawk Models
•The use of 9mm snow chains is permitted with the use
of 225/65R17 tires on size 17 x 7.5 ET31 wheels.
CAUTION!
•Use on Front Tires Only
•Damage to Front Wheel Drive (FWD) Models may
result if tire chains or traction devices are used with
original equipment size tires.
•Damage to Four Wheel Drive (4WD) Models with-
out a Two-Speed Power Takeoff Unit may result if
tire chains or traction devices are used with origi-
nal equipment size tires.
•Damage to Four Wheel Drive (4WD) Trailhawk
Models may result if tire chains or traction devices
are used with original equipment size tires.
WARNING!
Using tires of different size and type (M+S, Snow)
between front and rear axles can cause unpredictable
handling. You could lose control and have a collision.
5
STARTING AND OPERATING 565

type tires. Rotation will increase tread life, help to main-
tain mud, snow, and wet traction levels, and contribute to
a smooth, quiet ride.
Refer to the “Maintenance Schedule” for the proper
maintenance intervals. The reasons for any rapid or
unusual wear should be corrected prior to rotation being
performed.
The suggested Front Wheel Drive (FWD) rotation
method is the “rearward cross” shown in the following
diagram. This rotation pattern does not apply to some
directional tires that must not be reversed.
The suggested Four Wheel Drive (4WD) Tire rotation
method is the “forward-cross” shown in the following
diagram.
Front Wheel Drive (FWD) Tire Rotation
5
STARTING AND OPERATING 567