Electronic Roll Mitigation (Erm); Electronic Stability Program (Esp) - Jeep Grand Cherokee Owner's Manual

Electronic Roll Mitigation (ERM)

This system anticipates the potential for wheel
lift by monitoring the driver's steering wheel
input and the speed of the vehicle. When ERM
determines that the rate of change of the steer-
ing wheel angle and vehicle speed are suffi-
cient to potentially cause wheel lift, it then
applies the brake of the appropriate wheel and
may also reduce engine power to lessen the
chance that wheel lift will occur. ERM will only
intervene during very severe or evasive driving
maneuvers.
ERM can only reduce the chance of wheel lift
occurring during severe or evasive driving ma-
neuvers. It cannot prevent wheel lift due to
other factors such as road conditions, leaving
the roadway or striking objects or other ve-
hicles.
NOTE:
Anytime the ESP system is in the "Full Off"
mode, ERM is disabled. Refer to ESP (Elec-
tronic Stability Program) for a complete ex-
planation of the available ESP modes.
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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
rollovers, especially those that involve leaving
the roadway or striking objects or other ve-
hicles. Only a safe, attentive, and skillful driver
can prevent accidents. The capabilities of an
ERM-equipped vehicle must never be ex-
ploited in a reckless or dangerous manner
which could jeopardize the user's safety or the
safety of others.

Electronic Stability Program (ESP)

This system enhances directional control and
stability of the vehicle under various driving
conditions. ESP corrects for oversteering or
understeering of the vehicle by applying the
brake of the appropriate wheel to assist in
counteracting the oversteer or understeer con-
dition. Engine power may also be reduced to
help the vehicle maintain the desired path.
ESP uses sensors in the vehicle to determine
the vehicle path intended by the driver and
compares it to the actual path of the vehicle.
When the actual path does not match the
intended path, ESP applies the brake of the
appropriate wheel to assist in counteracting the
oversteer or understeer condition.
• Oversteer - when the vehicle is turning more
than appropriate for the steering wheel po-
sition.
• Understeer - when the vehicle is turning less
than appropriate for the steering wheel po-
sition.
The ESP/TCS Indicator Light, located in the
instrument cluster starts to flash as soon as the
tires lose traction and the ESP system becomes
active. The ESP/TCS Indicator Light also
flashes when the TCS is active. If the ESP/TCS
Indicator Light begins to flash during accelera-
tion, ease up on the accelerator and apply as
little throttle as possible. Be sure to adapt your
speed and driving to the prevailing road con-
ditions.