Jeep Wrangler: STOP/START SYSTEM — MANUAL TRANSMISSION (IF EQUIPPED) / 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. Situations when the engine
will not stop include (but not limited to):
- 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 4WD Low or N (Neutral).
- Driver's seat is not occupied or driver’s 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.
WARNING!
Vehicles with the Stop/Start system will be
equipped with two batteries. Both the main
and the supplemental batteries must be
disconnected to completely de-energize the
12 Volt electrical system...
When the gear selector is in NEUTRAL, the
engine will start when the clutch pedal is
pressed (does not require complete/full pedal
press). The vehicle will go into STOP/START
SYSTEM NOT READY mode until the vehicle
speed is greater than 5 mph (8 km/h)...
Other information:
NOTE:
See an authorized dealer for LED bulb replacement.
NOTE:
Lens fogging can occur under certain atmospheric
conditions. This will usually clear as
atmospheric conditions change to allow the
condensation to change back into a vapor.
Turning the lamps on will usually accelerate the
clearing process...
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...