Jeep Wrangler 2020 Owner's Manual page 368

366 STARTING AND OPERATING
To Activate The STOP/START AUTO STOP ACTIVE
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. Refer to "Instrument Cluster Display"
in "Getting To Know Your Instrument Panel" for further
information.
• Vehicle speed must be less than 2 mph (3 km/h).
• The gear selector must be in the NEUTRAL position and
the clutch pedal must be fully released
The engine will shut down, the tachometer will fall to the
Stop/Start position, the STOP/START AUTO STOP
ACTIVE message will appear, and the heater/air condi-
tioning (HVAC) air flow will be reduced.
Possible Reasons The Engine Does Not Autostop
Prior to engine shut down, the system will check many safety
and comfort conditions to see if they are fulfilled. In
following situations the engine will not stop:
• Driver's seat belt is not buckled.
• Outside temperature is less than 10°F (–12°C) or greater
than 109°F (43°C).
• Actual cabin temperature is significantly different than
temperature set on Auto HVAC.
• HVAC is set to full defrost mode.
• Engine has not reached normal operating temperature.
• Battery discharged.
• When driving in REVERSE.
• Hood is open.
• Transfer case is in 4L or Neutral
• Driver's seat is not occupied or driver door is open.
• Vehicle is at high altitude.
• The vehicle is on a steep grade.
• Forward Gear is engaged.
• Steering angle beyond threshold. (ESS Models Only)
• System fault is present.
• HVAC set to MAX A/C.
It may be possible for the vehicle to be driven several times
without the STOP/START system going into a STOP/
START READY state under more extreme conditions of the
items listed above.