Normal Starting; Starting Fluids; Normal Operation - Diesel Engine; Cold Weather Precautions - Jeep WRANGLER 2023 Owner's Manual

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126
STARTING AND OPERATING

NORMAL STARTING

Observe the instrument cluster lights when starting the
engine.
NOTE:
Normal starting of either a cold or a warm engine is
obtained without pumping or pressing the accelerator
pedal.
1. Always apply the parking brake.
2. Press and hold the brake pedal while pushing the
ENGINE START/STOP button once.
NOTE:
A delay of the start of up to five seconds is possible
under very cold conditions. The Wait to Start telltale
will be illuminated during the preheat process.
When the engine Wait To Start telltale goes off the
engine will automatically crank.
CAUTION!
If the Water in Fuel Indicator Light remains on, DO
NOT START the engine before you drain the water
from the fuel filters to avoid engine damage
page 308.
3. The system will automatically engage the starter to
crank the engine. If the vehicle fails to start, the
starter will disengage automatically after 25
seconds.
4. If you wish to stop the cranking of the engine prior to
the engine starting, push the ENGINE START/STOP
button again.
5. Check that the Oil Pressure Warning Light has
turned off.
6. Release the parking brake.

STARTING FLUIDS

The engine is equipped with a glow plug preheating
system. If the instructions in this manual are followed,
the engine should start in all conditions and no type of
starting fluid should be used.
WARNING!
Do not leave children or animals inside parked
vehicles in hot weather. Interior heat buildup may
cause serious injury or death.
When leaving the vehicle, always make sure the
keyless ignition node is in the OFF position, remove
the key fob from the vehicle and lock the vehicle.
Never leave children alone in a vehicle, or with
access to an unlocked vehicle. Allowing children to
be in a vehicle unattended is dangerous for a num-
ber of reasons. A child or others could be seriously
or fatally injured. Children should be warned not to
touch the parking brake, brake pedal or the gear
selector.
Do not leave the key fob in or near the vehicle, or
in a location accessible to children, and do not
leave the ignition of a vehicle equipped with Key-
less Enter 'n Go™ in the ACC or ON/RUN position.
A child could operate power windows, other con-
trols, or move the vehicle.
NORMAL OPERATION — DIESEL ENGINE
Observe the following when the diesel engine is
operating:
All message center lights are off.
Malfunction Indicator Light (MIL) is off.
Engine Oil Pressure telltale is not illuminated.
Voltmeter operation.
The voltmeter may show a gauge fluctuation at various
engine temperatures. This is caused by the glow plug
heating system. The number of cycles and the length of
the cycling operation is controlled by the engine control
module. Glow plug heater operation can run for several
minutes. Once the heater operation is complete, the
voltmeter needle will stabilize.

COLD WEATHER PRECAUTIONS

Operation in ambient temperature below 32°F (0°C)
may require special considerations. The following
charts suggest these options:
Fuel Operating Range
NOTE:
Use Ultra Low Sulfur Diesel (ULSD) Fuels ONLY.

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