2020 Ram 3500 Chassis Cab heater

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ONBOARD DIAGNOSTIC SYSTEM — OBD II ....... 118
Onboard Diagnostic System (OBD II)
Cybersecurity..............................................118
EMISSIONS INSPECTION AND MAINTENANCE
PROGRAMS ...................................................... 119
SAFETY
SAFETY FEATURES ............................................ 120
Anti-Lock Brake System (ABS) ................. 120
Electronic Brake Control (EBC) System ...121
AUXILIARY DRIVING SYSTEMS ........................ 129
Forward Collision Warning (FCW) With
Mitigation — If Equipped............................129 Tire Pressure Monitoring System
(TPMS) .....................................................132
OCCUPANT RESTRAINT SYSTEMS .................. 141
Occupant Restraint Systems Features ....141
Important Safety Precautions ...................141Seat Belt Systems ..................................... 142Supplemental Restraint Systems (SRS) ...151Child Restraints ........................................160
Transporting Pets ....................................179
SAFETY TIPS .................................................... 180
Transporting Passengers ..........................180
Exhaust Gas ........................................... 180
Safety Checks You Should Make Inside
The Vehicle ................................................180 Periodic Safety Checks You Should Make
Outside The Vehicle ...................................182
STARTING AND OPERATING
STARTING THE ENGINE — GAS ENGINE .........183
Automatic Transmission............................ 183
Tip Start Feature ....................................... 183Keyless Enter-N-Go — Ignition ................... 184
Normal Starting Using ENGINE START/
STOP Button ............................................ 184 Cold Weather Operation
(Below –22°F Or −30°C) ......................... 187 After Starting .............................................. 187
STARTING THE ENGINE — DIESEL ENGINE .... 187
Automatic Transmission............................ 187
Keyless Enter-N-Go — Ignition ................... 188
Extreme Cold Weather .............................. 190
Normal Starting Procedure — Engine Manifold
Air Temperature Above 66°F (19°C) ....... 191 Starting Procedure — Engine Manifold Air
Temperature 0°F To 66°F
(–18°C to 19°C) ....................................... 191 Starting Procedure — Engine Manifold Air
Temperature Below 0°F (-18°C) .............. 192 Starting Fluids ............................................ 193 NORMAL OPERATION — DIESEL ENGINE ....... 194
Cold Weather Precautions ........................ 194
Engine Idling ............................................. 197
Noise .......................................................... 198
Stopping The Engine ................................. 198Idle Shutdown ............................................ 199
Programmable Maximum Vehicle Speed ..... 199

Operating Precautions .............................. 200
Cooling System Tips .................................. 200
Diesel Particulate Filter (DPF) Manual
Regeneration - If Equipped ....................... 201
ENGINE BLOCK HEATER — IF EQUIPPED ........ 201
ENGINE BREAK-IN RECOMMENDATIONS —
GAS ENGINE ...................................................... 202
ENGINE BREAK-IN RECOMMENDATIONS —
DIESEL ENGINE .................................................. 202
DIESEL EXHAUST BRAKE
(ENGINE BRAKING) ........................................... 203
PARKING BRAKE .............................................. 204
AUTOMATIC TRANSMISSION ........................... 205 Ignition Park Interlock ............................... 206Brake/Transmission Shift Interlock
System ....................................................... 206 Six–Speed Automatic Transmission —
If Equipped ................................................ 207 Eight-Speed Automatic Transmission —
If Equipped ................................................. 213
AUXILIARY SWITCHES — IF EQUIPPED ........... 218

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INTRODUCTION11
HOW TO USE THIS MANUAL
Essential Information
Consult the Table of Contents to determine
which section contains the information you
desire.
Since the specification of your vehicle depends
on the items of equipment ordered, certain
descriptions and illustrations may differ from
your vehicle's equipment.
The detailed Index at the back of this Owner's
Manual contains a complete listing of all
subjects.
Symbols
Some vehicle components have colored labels
whose symbols indicate precautions to be
observed when using this component. Refer to
“Warning Lights and Messages” in “Getting To
Know Your Instrument Panel” for further infor -
mation on the symbols used in your vehicle.
WARNINGS AND CAUTIONS
This Owner’s Manual contains WARNINGS
against operating procedures that could result
in a collision, bodily injury and/or death. It also
contains CAUTIONS against procedures that
could result in damage to your vehicle. If you do
not read this entire Owner’s Manual, you may
miss important information. Observe all Warn -
ings and Cautions.
VAN CONVERSIONS/CAMPERS
The New Vehicle Limited Warranty does not
apply to body modifications or special equip -
ment installed by van conversion/camper
manufacturers/body builders. US residents
refer to the Warranty Information, Section
2.1.C. Canadian residents refer to the “What Is
Not Covered” section of the Warranty Informa -
tion. Such equipment includes video monitors,
VCRs, heaters, stoves, refrigerators, etc. For
warranty coverage and service on these items,
contact the applicable manufacturer. Operating instructions for the special equip
-
ment installed by the conversion/camper
manufacturer should also be supplied with your
vehicle. If these instructions are missing, please
contact an authorized dealer for assistance in
obtaining replacement documents from the
applicable manufacturer.
For information on the Body Builder’s Guide
refer to www.ramtrucks.com . This website
contains dimensional and technical specifica -
tions for your vehicle. It is intended for Second
Stage Manufacturer's technical support. For
service issues, contact an authorized dealer.
VEHICLE MODIFICATIONS/ALTERATIONS
WARNING!
Any modifications or alterations to this vehicle
could seriously affect its roadworthiness and
safety and may lead to a collision resulting in
serious injury or death.
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GETTING TO KNOW YOUR VEHICLE21
The Remote Start system will wait for the
“Wait To Start” Indicator Light to extinguish
before cranking the engine. This allows time
for the intake heater to preheat the incoming
air, and is normal operation in cold weather.
Refer to “Wait To Start Light,” located in
“Warning Lights And Messages” within
“Getting To Know Your Instrument Panel” for
more information.
How To Use Remote Start
All of the following conditions must be met
before the engine will remote start:
Transmission in PARK
Doors closed
Hood closed
Hazard switch off
Brake switch inactive (brake pedal not
pushed)
Battery at an acceptable charge level
PANIC button not pushed
Fuel meets minimum requirement
Water In Fuel Indicator Light is not illumi -
nated
Wait To Start Light Indicator Light is not illu -
minated
Malfunction Indicator Light is not illuminated
Remote Start Abort Message
The following messages will display in the
instrument cluster display if the vehicle fails to
remote start or exits remote start prematurely:
Remote Start Aborted — Door Open
Remote Start Aborted — Hood Open
Remote Start Aborted — Fuel Low
Remote Start Aborted — System Fault The instrument cluster display message is
stored until the ignition is placed in the ON/RUN
position.
To Enter Remote Start Mode
Push and release the Remote Start button on
the key fob twice, within five seconds. The
parking lights will flash and the horn will chirp
twice (if programmed). In cold ambient
temperature conditions, the diesel vehicle may
delay crank up to 30 seconds for the Intake Air
Heater. Once the vehicle has started, the
engine will run for 15 minutes.
NOTE:
Crank may be delayed up to 75 seconds for
intake air heater operation at high altitudes,
and/or extreme cold.
The park lamps will turn on and remain on
during Remote Start mode.
For security, power window and power
sunroof operation (if equipped) are disabled
when the vehicle is in the Remote Start
mode.
WARNING!
Do not start or run an engine in a closed
garage or confined area. Exhaust gas
contains Carbon Monoxide (CO) which is
odorless and colorless. Carbon Monoxide is
poisonous and can cause serious injury or
death when inhaled.
Keep key fobs away from children. Opera
-
tion of the Remote Start System, windows,
door locks or other controls could cause
serious injury or death.
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34GETTING TO KNOW YOUR VEHICLE
When you remove the key fob from the igni -
tion, the driver’s seat will move to a position
0.3 inches (7.7 mm) forward of the rear stop if the driver’s seat position is between
0.9 inches and 2.7 inches (22.7 mm and
67.7 mm) forward of the rear stop. The seat
will return to its previously set position when
you place the ignition to the ACC or RUN posi -
tion.
The Easy Entry/Easy Exit feature is disabled
when the driver’s seat position is less than
0.9 inches (22.7 mm) forward of the rear stop. At this position, there is no benefit to
the driver by moving the seat for Easy Exit or
Easy Entry.
Each stored memory setting will have an associ -
ated Easy Entry and Easy Exit position.
NOTE:
The Easy Entry/Exit feature is not enabled when
the vehicle is delivered from the factory. The
Easy Entry/Exit feature is enabled (or later
disabled) through the programmable features
in the Uconnect system. Refer to “Uconnect
Settings” in “Multimedia” for further informa -
tion.
Heated Seats — If Equipped
On some models, the front and rear seats may
be equipped with heaters located in the seat
cushions and seat backs.
Front Heated Seats
The heated seats control buttons are located on
the center instrument panel below the touch -
screen, and are also located within the climate
or controls screen of the touchscreen.
Push the heated seat button once to turn
the HI setting on.
Push the heated seat button a second
time to turn the MED setting on.
Push the heated seat button a third time
to turn the LO setting on.
Push the heated seat button a fourth time
to turn the heating elements off.
NOTE:
The engine must be running for the heated
seats to operate.
The level of heat selected will stay on until
the operator changes it.
Vehicles Equipped With Remote Start
On models that are equipped with remote start,
the driver’s seat can be programmed to come
on during a remote start.
This feature can be programmed through the
Uconnect system. Refer to “Uconnect Settings”
in “Multimedia” for further information.
WARNING!
Persons who are unable to feel pain to the
skin because of advanced age, chronic
illness, diabetes, spinal cord injury, medica -
tion, alcohol use, exhaustion or other phys -
ical condition must exercise care when
using the seat heater. It may cause burns
even at low temperatures, especially if
used for long periods of time.
Do not place anything on the seat or seat -
back that insulates against heat, such as a
blanket or cushion. This may cause the seat
heater to overheat. Sitting in a seat that has
been overheated could cause serious
burns due to the increased surface
temperature of the seat.

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38GETTING TO KNOW YOUR VEHICLE
STEERING WHEEL
Tilt Steering Column
This feature allows you to tilt the steering
column upward or downward. The tilt lever is
located on the steering column, below the multi -
function lever.
Pull the lever toward the steering wheel to
unlock the steering column. With one hand
firmly on the steering wheel, move the steering
column up or down, as desired. Release the
lever to lock the steering column firmly in place.

Tilt Steering Lever

Heated Steering Wheel — If Equipped
The steering wheel contains a heating element
that helps warm your hands in cold weather.
The heated steering wheel has only one
temperature setting. Once the heated steering
wheel has been turned on, it will stay on until
the operator turns it off. The heated steering
wheel may not turn on when it is already warm.
The heated steering wheel control button is
located on the center instrument panel below
the touchscreen, as well as within the climate or
controls screen of the touchscreen.
Press the heated steering wheel button
once to turn the heating element on.
Press the heated steering wheel button a
second time to turn the heating element off. NOTE:
The engine must be running for the heated
steering wheel to operate.
Vehicles Equipped With Remote Start
On models that are equipped with remote start,
the heated steering wheel can be programmed
to come on during a remote start.
This feature can be programmed through the
Uconnect system. Refer to “Uconnect Settings”
in “Multimedia” for further information.
WARNING!
Do not adjust the steering column while
driving. Adjusting the steering column while
driving or driving with the steering column
unlocked, could cause the driver to lose
control of the vehicle. Failure to follow this
warning may result in serious injury or death.
WARNING!
Persons who are unable to feel pain to the
skin because of advanced age, chronic
illness, diabetes, spinal cord injury, medica
-
tion, alcohol use, exhaustion, or other phys -
ical conditions must exercise care when
using the steering wheel heater. It may
cause burns even at low temperatures,
especially if used for long periods.
Do not place anything on the steering wheel
that insulates against heat, such as a
blanket or steering wheel covers of any type
and material. This may cause the steering
wheel heater to overheat.

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GETTING TO KNOW YOUR VEHICLE63
The temperature can be displayed in U.S. or
Metric units by selecting the U.S./Metric
customer-programmable feature. Refer to
the “Uconnect Settings” in “Multimedia” for
further information.
To provide you with maximum comfort in the
Automatic mode during cold start-ups, the
blower fan will remain on low until the engine
warms up. The blower will increase in speed
and transition into Auto mode.
Manual Operation Override
This system offers a full complement of manual
override features. The AUTO symbol in the front
ATC display will be turned off when the system
is being used in the manual mode.
Operating Tips
NOTE:
Refer to the chart at the end of this section for
suggested control settings for various weather
conditions.
Summer Operation
The engine cooling system must be protected
with a high-quality antifreeze coolant to provide
proper corrosion protection and to protect
against engine overheating. OAT coolant
(conforming to MS.90032) is recommended.
Winter Operation
To ensure the best possible heater and
defroster performance, make sure the engine
cooling system is functioning properly and the
proper amount, type, and concentration of
coolant is used. Use of the Air Recirculation
mode during Winter months is not recom -
mended, because it may cause window fogging.
Vacation/Storage
Before you store your vehicle, or keep it out of
service (i.e., vacation) for two weeks or more,
run the air conditioning system at idle for about
five minutes, in fresh air with the blower setting
on high. This will ensure adequate system lubri -
cation to minimize the possibility of compressor
damage when the system is started again.
Window Fogging
Vehicle windows tend to fog on the inside in
mild, rainy, and/or humid weather. To clear the
windows, select Defrost or Mix mode and
increase the front blower speed. Do not use the
Recirculation mode without A/C for long
periods, as fogging may occur.
CAUTION!
Failure to follow these cautions can cause
damage to the heating elements:
Use care when washing the inside of the
rear window. Do not use abrasive window
cleaners on the interior surface of the
window. Use a soft cloth and a mild
washing solution, wiping parallel to the
heating elements. Labels can be peeled off
after soaking with warm water.
Do not use scrapers, sharp instruments, or
abrasive window cleaners on the interior
surface of the window.
Keep all objects a safe distance from the
window.
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GETTING TO KNOW YOUR INSTRUMENT PANEL89
5. Speedometer
Indicates vehicle speed.
6. Fuel Gauge
The pointer shows the level of fuel in the fuel tank when the ignition switch is in
the ON/RUN position.
 The fuel pump symbol points
to the side of the vehicle where
the fuel filler door is located.
Refer to “Refueling The Vehicle — Diesel
Engine” in “Starting And Operating” for
further information. 7. Diesel Exhaust Fluid (DEF) Gauge
The DEF Gauge displays the actual level
of Diesel Exhaust Fluid in the DEF tank.
Diesel Exhaust Fluid (DEF) is required to
maintain normal vehicle operation and
emissions compliance. If something is
wrong with the gauge, a DEF Warning
Message or Malfunction Indicator Light
(MIL) will be displayed. More information
is available in the instrument cluster
display section under the heading of
Diesel Exhaust Fluid (DEF) Warning
Messages. NOTE:The gauge may take up to five seconds to
update after adding a gallon or more of
Diesel Exhaust Fluid (DEF) to the DEF tank. If
you have a fault related to the DEF system,
the gauge may not update to the new level.
See an authorized dealer for service.
The DEF gauge may also not immediately
update after a refill if the temperature of the
DEF fluid is below 39°F (4°C). The DEF tank
heater will possibly warm up the DEF fluid
and allow the gauge to update after a period
of run time. Under very cold conditions, it is
possible that the gauge may not reflect the
new fill level for several drives.
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GETTING TO KNOW YOUR INSTRUMENT PANEL91
Diesel INSTRUMENT CLUSTER

1. Tachometer

Indicates the engine speed in revolutions
per minute (RPM x 1000).
2. Instrument Cluster Display
When the appropriate conditions exist, this display shows the instrument cluster
display messages. Refer to “Instrument
Cluster Display” in “Getting To Know Your
Instrument Panel” for further informa -
tion.
3. Speedometer
Indicates vehicle speed.
4. Fuel Gauge
The pointer shows the level of fuel in the fuel tank when the ignition switch is in
the ON/RUN position.
 The fuel pump symbol points
to the side of the vehicle where
the fuel filler door is located. Refer to “Refueling The Vehicle — Diesel
Engine” in “Starting And Operating” for
further information.
5. Diesel Exhaust Fluid (DEF) Gauge
The DEF Gauge displays the actual level of Diesel Exhaust Fluid in the DEF tank.
Diesel Exhaust Fluid (DEF) is required to
maintain normal vehicle operation and
emissions compliance. If something is
wrong with the gauge, a DEF Warning
Message or Malfunction Indicator Light
(MIL) will be displayed. More information
is available in the instrument cluster
display section under the heading of
Diesel Exhaust Fluid (DEF) Warning
Messages. NOTE:
The DEF tank on these vehicles is designed
with a large amount of full reserve. So the
level sensor will indicate a full reading even
before the tank is completely full. To put it
another way, there’s additional storage
capacity in the tank above the Full mark
that’s not represented in the gauge. You may
not see any movement in the reading – even
after driving up to 200 miles
(321 kilometers) in some cases.
The gauge may take up to five seconds to
update after adding a gallon or more of
Diesel Exhaust Fluid (DEF) to the DEF tank. If
you have a fault related to the DEF system,
the gauge may not update to the new level.
See an authorized dealer for service.
The DEF gauge may also not immediately
update after a refill if the temperature of the
DEF fluid is below 39°F (4°C). The DEF tank
heater will possibly warm up the DEF fluid
and allow the gauge to update after a period
of run time. Under very cold conditions, it is
possible that the gauge may not reflect the
new fill level for several drives.
3

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