Extreme Cold Weather; Air Temperature Above 66°F (19°C) - RAM Commercial CHASSIS CAB 3500 2021 Owner's Manual

NOTE:
Engine idle speed will automatically increase

to 1,000 RPM and engage the Variable
Geometry Turbocharger at low coolant
temperatures to improve engine warm-up.
The engine will not automatically crank after

the engine "Wait to Start" telltale goes off if a
door or the hood is ajar.
If the engine stalls, or if the ignition switch is

left ON for more than two minutes after the
"Wait to Start" telltale goes out, reset the
intake air heater by turning the ignition switch
to the OFF position for at least 5 seconds and
then back ON. Repeat steps 1 through 6 of
"Keyless Enter-N-Go Starting Procedure –
Engine Manifold Air Temperature 0°F To 66°F
(–18°C to 19°C)."
E C W
XTREME OLD EATHER
The Cummins Turbo Diesel engine is equipped
with several features designed to assist cold
weather starting and operation:
The engine block heater is a resistance heater

installed in the water jacket of the engine just
above and behind the oil filter.
It requires a 110–115 Volt AC electrical outlet
with a grounded, three-wire extension cord.
NOTE:
The engine block heater cord is a factory
installed option. If your vehicle is not equipped,
heater cords are available from an authorized
Mopar dealer.
A 12 Volt heater built into the fuel filter hous-

ings aid in preventing fuel gelling. It is
controlled by a built-in thermostat.
An intake air heater system both improves

engine starting and reduces the amount of
white smoke generated by a warming engine.
N S P
ORMAL TARTING ROCEDURE
E M A T
NGINE ANIFOLD IR EMPERATURE
A 66°F (19°C)
BOVE
Observe the instrument panel cluster lights
when starting the engine.
1. Always apply the parking brake.
2. Shift into PARK for an automatic
transmission.
STARTING AND OPERATING
3. Place the ignition switch in the ON position
and watch the instrument panel cluster
lights.
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 Ú page 375.
4. Place the ignition switch in the START
position and crank the engine. Do not press
the accelerator during starting.
CAUTION!
—
Do not crank engine for more than 25 seconds
at a time or starter motor damage may result.
Turn the ignition switch to the OFF position and
wait at least two minutes for the starter to cool
before repeating start procedure.
5. Check that the oil pressure warning light
has turned off.
6. Release the parking brake.
125
4