Stop/Start System; Autostop Mode; Possible Reasons The Engine Does Not Autostop - Jeep Wrangler Owner's Manual

STOP/START SYSTEM

The Stop/Start system is designed to reduce fuel
consumption. 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 automatically restart the engine.
Engine Stop/Start (ESS) vehicles have been upgraded
with a heavy duty starter, enhanced battery, and other
upgraded engine parts, to handle the additional engine
starts.
NOTE:
It is recommended that the Stop/Start System be disabled
during off-road use.
Secondary Battery
Your vehicle may be equipped with a secondary battery
used to power the Stop/Start system and the 12 Volt
vehicle electrical system. The secondary battery is located
behind the wheel well for the front passenger wheel.
Battery Locations
1 — Primary Battery
2 — Secondary Battery
A M
UTOSTOP ODE
WARNING!
 Vehicles with the Stop/Start system will be equipped
with two batteries. Both the main and the supple-
mental batteries must be disconnected to
completely de-energize the 12 Volt electrical system.
 Serious injury or death could result if you do not
disconnect both batteries. To learn how to properly
disconnect, see an authorized dealer.
STARTING AND OPERATING
The Stop/Start feature is enabled after every normal
customer engine start. At that time, the system will go into
STOP/START READY.
To Activate The Autostop Mode, The Following Must Occur:
 The system must be in STOP/START READY state. A
STOP/START READY message will be displayed in the
instrument cluster display within the Stop/Start
section page 72.
Ú
 The vehicle must be completely stopped.
 The gear selector must be in a forward gear and the
brake pedal pressed.
The engine will shut down, the tachometer will move to the
zero position and the Stop/Start telltale will illuminate
indicating you are in Autostop. Customer settings will be
maintained upon return to an engine running condition.
P R T E
OSSIBLE EASONS HE
N A
OT UTOSTOP
Prior to engine shut down, the system will check many safety
and comfort conditions to see if they are fulfilled. Detailed
information about the operation of the Stop/Start system
may be viewed in the instrument cluster display Stop/Start
screen. In the following situations, the engine will not stop:
 Driver's seat belt is not buckled.
 Driver's door is not closed.
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D
NGINE OES