User Manual - Page 180

For 2020 JEEP WRANGLER.

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178 STARTING AND OPERATING
STOP/START SYSTEM — AUTOMATIC
TRANSMISSION (IF EQUIPPED)
The Engine Stop/Start (ESS) function is developed 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 re-start the
engine.
ESS vehicles have been upgraded with a heavy duty
starter, enhanced battery, and other upgraded engine
parts, to handle the additional engine starts. Vehicles
equipped with eTorque contain a heavy duty motor
generator and an additional hybrid electric battery to store
energy from vehicle deceleration for use on engine startup
after a stop as well as providing launch torque assist.
NOTE:
It is recommended that Stop/Start 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
AUTOMATIC MODE
The Stop/Start feature is enabled after every
normal customer engine start. At that time, the
system will go into STOP/START READY and if
all other conditions are met, can go into a
STOP/START AUTOSTOP ACTIVE “Autostop” mode.
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. Refer to “Instrument Cluster” in “Getting To
Know Your Instrument Panel” for further information.
The vehicle must be completely stopped.
The gear selector must be in a forward gear and the
brake pedal depressed.
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.
POSSIBLE REASONS THE ENGINE DOES
N
OT AUTOSTOP
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.
Battery temperature is too warm or cold.
1 — Primary Battery
2 — Secondary Battery
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.
20_JL_OM_EN_USC_t.book Page 178
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