Jeep WRANGLER 2020, Owner'S Manual

Page: 143 / 548

STARTING AND OPERATING 141
3. Watch for the “Wait To Start Light” in the
instrument cluster
Ú
page 108. It will glow
for 2 to 10 seconds or more, depending on
engine temperature. When the “Wait To
Start Light” goes out, the engine is ready to
start.
4. Tip Start Feature: Do not press the
accelerator. Place the ignition to the START
position and then release it. The starter
motor will continue to run, and it will
automatically disengage when the engine is
running. If the engine fails to start, the
starter will disengage automatically in 25
seconds. If this occurs, place the ignition to
the LOCK position, wait 25 to 30 seconds,
then repeat the “Normal Starting”
procedure.
NOTE:
The starter motor may run up to 30 seconds in
very cold conditions until the engine is started.
The starter can be disengaged by placing the
ignition in the OFF position, if required.
5. After the engine starts, allow it to idle for
approximately 30 seconds before driving.
This allows oil to circulate and lubricate the
turbocharger.
Diesel Engine Warm-Up
Avoid full throttle operation when the engine is
cold. When starting a cold engine, bring the
engine up to operating speed slowly to allow the
oil pressure to stabilize as the engine warms up.
NOTE:
High-speed, no-load running of a cold engine
can result in excessive white smoke and poor
engine performance. No-load engine speeds
should be kept under 1,200 RPM during the
warm-up period, especially in cold, ambient
temperature conditions.
If temperatures are below 32°F (0°C), operate
the engine at moderate speeds for five minutes
before full loads are applied.
Diesel Engine Idling — In Cold Weather
Avoid prolonged idling in ambient temperatures
below 0°F (-18°C). Long periods of idling may
be harmful to your engine because combustion
chamber temperatures can drop so low that the
fuel may not burn completely. Incomplete
combustion allows carbon and varnish to form
on piston rings and injector nozzles. Also, the
unburned fuel can enter the crankcase, diluting
the oil and causing rapid wear to the engine.
Winter Front Cover
A Winter front or cold weather cover can be
used in ambient temperatures below 32°F
(0°C), especially during extended idle
conditions. This cover is equipped with four
flaps for managing total grille opening in varying
ambient temperatures. If a Winter front or cold
weather cover is to be used the flaps should be
in the full open position to allow air flow to the
cooling module and automatic transmission oil
cooler. When ambient temperatures drop below
0°F (-17°C) the four flaps need to be closed. A
suitable cold weather cover is available from a
Mopar® dealer.
Stopping the Engine
The following chart should be used as a guide in
determining the amount of engine idle time
required to sufficiently cool down the
turbocharger before shut down, depending
upon the type of driving and the amount of
cargo.
Before turning off your turbo diesel engine,
always allow the engine to return to normal idle
speed and run for several seconds. This
ensures proper lubrication of the turbocharger.
This is particularly necessary after any period of
hard driving.
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