Jeep Grand Cherokee Quick Reference Manual - page 9
• When the Fuel Economy (ECO) mode is en-
gaged, the vehicle control systems will be
able to change the following:
• The transmission will upshift sooner and
downshift later
• For vehicles equipped with the 5.7L Hemi,
4 cylinder mode will be enabled under
certain conditions.
• The overall driving performance will be
more conservative.
Engine STOP/START System
(ESS)
The STOP/START system was developed to re-
duce emissions and will turn back ON every
time the ignition is turned OFF and then back
ON again. The system defaults back ON at
every ignition cycle.
The system will stop the engine automatically
during a vehicle stop if the required conditions
are met.
Releasing the brake pedal or pressing the
accelerator pedal will start the engine.
How do I manually turn off/on the engine STOP/
START system?
• Press the STOP/START OFF switch (located
on the switch bank). The light on the switch
will illuminate when the system is off. The
light on the switch will turn off when system
is on.
What are possible reasons the engine does not
autostop?
• The hood is ajar.
• The transmission
is not in a forward
gear.
• Driver’s door is
open.
• The vehicle is in
4LO transfer
case mode
(if equipped).
• Driver’s seat belt
is unbuckled.
• The vehicle has
not reached a
speed of 5 mph
(8 km/h) after the
previous autostop.
• Cabin heating or cooling is in process and an
acceptable cabin temperature has not been
achieved.
STOP/START Off Switch