2010 JEEP GRAND CHEROKEE ESP

High Range (Four-Wheel Drive Models) or
Two-Wheel Drive Models
On
This is the normal operating mode for ESP in 4WD HIGH
range and in two-wheel drive vehicles. Whenever the
vehicle is started or the transfer case (if equipped) is
shifted from 4WD LOW range or NEUTRAL back to
4WD HIGH range, the ESP system will be in this “On”
mode. This mode should be used for most driving
situations. ESP should only be turned to “Partial Off” or
“Full Off” mode for specific reasons as noted below.
Partial Off
This mode is entered by momentarily pressing the “ESP
OFF” switch. When in “Partial Off” mode, the TCS
portion of ESP, except for the “limited slip” feature
described in the TCS section, has been disabled and the
“ESP/TCS Indicator Light” will be illuminated. All other
stability features of ESP function normally. This mode isintended to be used if the vehicle is in deep snow, sand,
or gravel conditions and more wheel spin than ESP
would normally allow is required to gain traction. To
turn ESP on again, momentarily press the “ESP OFF”
switch. This will restore the normal “ESP On” mode of
operation.
ESP OFF Switch
5
STARTING AND OPERATING 275

NOTE:To improve the vehicle’s traction when driving
with snow chains, or starting off in deep snow, sand, or
gravel, it may be desirable to switch to the “Partial Off”
mode by pressing the “ESP OFF” switch. Once the
situation requiring ESP to be switched to the “Partial Off”
mode is overcome, turn ESP back on by momentarily
pressing the “ESP OFF” switch. This may be done while
the vehicle is in motion.
Full Off (Four-Wheel Drive Models Only)
This mode is intended for off-highway or off-road use
when ESP stability features could inhibit vehicle maneu-
verability due to trail conditions. This mode is entered by
pressing and holding the “ESP OFF” switch for five
seconds when the vehicle is stopped and the engine is
running. After five seconds, the “ESP/TCS Indicator
Light” will illuminate, and the “ESP OFF” message will
appear in the Electronic Vehicle Information Center (EVIC). Refer to “Electronic Vehicle Information Center
(EVIC)” in “Understanding Your Instrument Panel” for
further information.
In this mode, ESP and TCS, except for the “limited slip”
feature described in the TCS section, are turned off until
the vehicle reaches a speed of 40 mph (64 km/h). At
40 mph (64 km/h), the system returns to “Partial Off”
mode, described above. When the vehicle speed drops
below 35 mph (56 km/h), the ESP system shuts off. ESP
is deactivated at low vehicle speeds so that it will not
interfere with off-road driving, but ESP function returns
to provide the stability feature at speeds above 40 mph
(64 km/h). The “ESP/TCS Indicator Light” will always
be illuminated when ESP is off. To turn ESP on again,
momentarily press the “ESP OFF” switch. This will
restore the normal “ESP On” mode of operation.
NOTE:
The “ESP OFF” message will display, and the
audible chime will sound, when the shift lever is placed
276 STARTING AND OPERATING

in the PARK position from any other position, and then
moved out of the PARK position. This will occur even if
the message was previously cleared.
WARNING!
With the ESP switched off, the enhanced vehicle
stability offered by ESP and ERM are unavailable. In
an emergency evasive maneuver, the ESP and ERM
systems will not engage to assist in maintaining
stability. The “Full Off” ESP mode is intended for
off-road use only.
4WD Low Range
Full Off
This is the normal operating mode for ESP in 4WD LOW
range. Whenever the vehicle is started in 4WD LOW
range, or the transfer case (if equipped) is shifted from
4WD HIGH range or NEUTRAL to 4WD LOW range, theESP system will be in this “Full Off” mode. In 4WD LOW
range, ESP and TCS, except for the “limited slip” feature
described in the TCS section, are turned off until the
vehicle reaches a speed of 40 mph (64 km/h). At 40 mph
(64 km/h), the normal ESP stability function returns, but
TCS remains off. When the vehicle speed drops below
35 mph (56 km/h), the ESP system shuts off. ESP is
deactivated at low vehicle speeds in 4WD LOW range so
that it will not interfere with off-road driving, but ESP
function returns to provide the stability feature at speeds
above 40 mph (64 km/h). The “ESP/TCS Indicator
Light” will always be illuminated in 4WD LOW range
when ESP is off.
NOTE:
The “ESP OFF” message will display, and the
audible chime will sound, when the shift lever is placed
in the PARK position from any other position, and then
moved out of the PARK position. This will occur even if
the message was previously cleared
5
STARTING AND OPERATING 277

WARNING!
With the ESP switched off, the enhanced vehicle
stability offered by ESP and ERM are unavailable. In
an emergency evasive maneuver, the ESP and ERM
systems will not engage to assist in maintaining
stability. The “Full Off” mode is intended for off-
road use only.
Trailer Sway Control (TSC)
TSC uses sensors in the vehicle to recognize an exces-
sively swaying trailer and will take the appropriate
actions to attempt to stop the sway. The system may
reduce engine power and apply the brake of the appro-
priate wheel(s) to counteract the sway of the trailer. TSC
will become active automatically once an excessively
swaying trailer is recognized. No driver action is re-
quired. Note that TSC cannot stop all trailers from
swaying. Always use caution when towing a trailer andfollow the trailer tongue weight recommendations. Refer
to “Trailer Towing” in “Starting and Operating” for
further information. When TSC is functioning, the “ESP/
TCS 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 ESP 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 Start Assist (HSA) – Four-Wheel Drive Models
With NV245 Two–Speed Transfer Case Only
The HSA system is designed to assist the driver when
starting a vehicle from a stop on a hill. HSA will maintain
the level of brake pressure the driver applied for a short
278 STARTING AND OPERATING

period of time after the driver takes their foot off of the
brake pedal. If the driver does not apply the throttle
during this short period of time, the system will release
brake pressure and the vehicle will roll down the hill. The
system will release brake pressure in proportion to the
amount of throttle applied as the vehicle starts to move in
the intended direction of travel.
HSA Activation Criteria
The following criteria must be met in order for HSA to
activate:
•Vehicle must be stopped.
•Vehicle must be on a 8% grade or greater hill.
•Gear selection matches vehicle uphill direction (i.e.,
vehicle facing uphill is in forward gear; vehicle back-
ing uphill is in REVERSE gear).HSA will work in REVERSE and all forward gears when
the activation criteria have been met. The system will not
activate if the vehicle is placed in NEUTRAL or PARK.
WARNING!
There may be situations on minor hills (i.e., less than
8%), with a loaded vehicle, or while pulling a trailer,
when the system will not activate and slight rolling
may occur. This could cause a collision with another
vehicle or object. Always remember the driver is
responsible for braking the vehicle.
Towing with HSA
HSA will provide assistance when starting on a grade
when pulling a trailer.
5
STARTING AND OPERATING 279

WARNING!
•If you use a trailer brake controller with your
trailer, your trailer brakes may be activated and
deactivated with the brake switch. If so, when the
brake pedal is released, there may not be enough
brake pressure to hold the vehicle and trailer on a
hill and this could cause a collision with another
vehicle or object behind you. In order to avoid
rolling down the hill while resuming acceleration,
manually activate the trailer brake prior to releas-
ing the brake pedal. Always remember the driver
is responsible for braking the vehicle.(Continued)
WARNING! (Continued)
•HSA is not a parking brake. If you stop the vehicle
on a hill without putting the transmission in
PARK and using the parking brake, it will roll
down the hill and could cause a collision with
another vehicle or object. Always remember to use
the parking brake while parking on a hill, and that
the driver is responsible for braking the vehicle.
HSA Off
If you wish to turn off the HSA system, it can be done
using the Customer Programmable Features in the Elec-
tronic Vehicle Information Center (EVIC). Refer to “Elec-
tronic Vehicle Information Center (EVIC)” in “Under-
standing Your Instrument Panel” for further information.
280 STARTING AND OPERATING

When HDC is properly enabled, the message “HILL
DESCENT CONTROL” will appear in the EVIC and the
light in the switch will be illuminated. HDC will auto-
matically apply the brakes to control downhill speed
when necessary. HDC has the capability to sense terrain
and will only activate when the vehicle is descending a
hill. It will usually not activate on level ground.
The HDC speed may be adjusted by the driver to suit the
driving conditions. The speed corresponds to the trans-
mission gear selected.
•1st = 1 mph (1.6 km/h)
•2nd = 2.5 mph (4 km/h)
•3rd = 4 mph (6 km/h)
•4th = 5.5 mph (9 km/h)
•5th = 7.5 mph (12 km/h)
•REVERSE = 1 mph (1.6 km/h)
•NEUTRAL = 2.5 mph (4 km/h)
•PARK = HDC will not function
HDC also has the capability to sense rough terrain, and
will automatically adjust to a slightly slower set speed
[about 0.3 mph (0.5 km/h) than normal.]
HDC operation can be overridden with brake application
to slow the vehicle down below the HDC control speed.
Conversely, 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 back to the origi-
nal set speed.
282 STARTING AND OPERATING

HDC is intended for low speed off-road driving only.
At vehicle speeds above 30 mph (48 km/h), HDC will no
longer function. When the vehicle speed drops below
30 mph (48 km/h), HDC function will automatically
resume and the vehicle speed will return to the chosen set
speed.
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.
ESP/BAS Warning Light and ESP/TCS Indicator
Light
The malfunction indicator light for the ESP is
combined with the BAS indicator. The “ESP/
BAS Warning Light” and the “ESP/TCS Indi-
cator Light” in the instrument cluster both
come on when the ignition switch is turned to the ON
position. They should both go out with the engine
running.
If the “ESP/BAS Warning Light” comes on
continuously with the engine running, a mal-
function has been detected in either the ESP or
the BAS system, or both. If this light remains on
after several ignition switch cycles, and the vehicle has
been driven several miles at speeds greater than 30 mph
(48 km/h), see your authorized dealer as soon as possible
to have the problem diagnosed and corrected.
5
STARTING AND OPERATING 283