2020 Ram 3500 Chassis Cab ECU

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INTRODUCTION
HOW TO USE THIS MANUAL ...............................11
Essential Information .................................. 11
Symbols ........................................................ 11
WARNINGS AND CAUTIONS ...............................11
VAN CONVERSIONS/CAMPERS .........................11
VEHICLE MODIFICATIONS/ALTERATIONS .......11
GETTING TO KNOW YOUR VEHICLE
VEHICLE USER GUIDE — IF EQUIPPED ...............12
KEYS ......................................................................13
Key Fob......................................................... 13
IGNITION SWITCH ...............................................17
Keyless Push Button Ignition ...................... 17
REMOTE START — IF EQUIPPED (GASOLINE) ...18
How To Use Remote Start ........................... 18
Remote Start Abort Message ...................... 19
To Enter Remote Start Mode ...................... 19
To Exit Remote Start Mode Without
Driving
The Vehicle .................................................. 19 To Exit Remote Start Mode And Drive The
Vehicle .......................................................... 20 Remote Start Comfort Systems —
If Equipped ................................................... 20 General Information .................................... 20 REMOTE START — IF EQUIPPED (DIESEL)......... 20
How To Use Remote Start ........................... 21
Remote Start Abort Message...................... 21
To Enter Remote Start Mode ...................... 21
To Exit Remote Start Mode Without
Driving The Vehicle ...................................... 22 To Exit Remote Start Mode And Drive The
Vehicle .......................................................... 22 Remote Start Comfort Systems —
If Equipped ................................................... 22
SENTRY KEY.......................................................... 22
Key Programming ....................................... 23
Replacement Keys ..................................... 23
General Information .................................... 23
VEHICLE SECURITY ALARM .............................. 24
To Arm The System ...................................... 24
To Disarm The System ................................ 24
Rearming Of The System............................. 25
Security System Manual Override .............. 25
DOORS .................................................................. 25
Manual Door Locks...................................... 25
Power Door Locks — If Equipped ............... 26
Keyless Enter-N-Go — Passive Entry .......... 26
Automatic Door Locks — If Equipped ....... 29
Child-Protection Door Lock ........................ 29
SEATS ................................................................ 30
Manual Front Seat Adjustment................... 30
Power Driver Seat Adjustment —
If Equipped ................................................... 31 Driver Memory Seats — If Equipped .......... 32
Heated Seats — If Equipped ....................... 34
Ventilated Seats — If Equipped................... 35 HEAD RESTRAINTS ..........................................36
Front Head Restraints ................................. 36
Rear Head Restraint Adjustment ............... 37
Rear Head Restraint Removal .................... 37
STEERING WHEEL .............................................38
Tilt Steering Column .................................. 38
Heated Steering Wheel — If Equipped ...... 38
DRIVER ADJUSTABLE PEDALS —
IF EQUIPPED .........................................................39
MIRRORS ..............................................................40
Inside Day/Night Mirror — If Equipped ...... 40
Automatic Dimming Mirror —
If Equipped .................................................. 40 Automatic Dimming Mirror With Rear View
Camera Display — If Equipped ................... 40 Outside Mirrors ........................................... 41
Driver's Outside Automatic Dimming
Mirror — If Equipped .................................... 41 Power Mirrors — If Equipped ...................... 41
Power Convex Mirror Switch —
If Equipped ................................................... 42 Trailer Towing Mirrors.................................. 42
Heated Mirrors — If Equipped .................... 43
Tilt Side Mirrors In Reverse —
If Equipped ................................................... 43 Outside Mirrors Folding Feature ................. 43
Illuminated Vanity Mirror —
If Equipped ................................................... 44

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EXTERIOR LIGHTS ...............................................44 Multifunction Lever ...................................... 44
Headlight Switch .......................................... 44
Daytime Running Lights (DRLs) ................. 45
High/Low Beam Switch ............................... 45
Automatic High Beam Headlamp
Control — If Equipped .................................. 45 Flash-To-Pass ............................................. 46
Automatic Headlights — If Equipped .......... 46
Parking Lights And Panel Lights ................. 46
Directional LED Headlamp System —
If Equipped ................................................... 46 Headlights On With Wipers (Available With
Automatic Headlights Only) ......................... 46 Headlight Delay ............................................ 47
Lights-On Reminder ..................................... 47
Front Fog Lights — If Equipped .................. 47
Turn Signals ............................................. 47
Lane Change Assist — If Equipped ............. 47
Cargo Lights/Trailer Spotter Lights —
If Equipped ................................................... 47 Battery Saver................................................ 48
INTERIOR LIGHTS ................................................48
Courtesy Lights ............................................ 48
Illuminated Entry ......................................... 49
WINDSHIELD WIPERS AND WASHERS ............50
Windshield Wipers ..................................... 50
Rain Sensing Wipers — If Equipped ........... 51 CLIMATE CONTROLS ........................................... 51
Manual Climate Control Overview ............ 52
Automatic Climate Control Overview .......... 55
Climate Control Functions........................... 62
Automatic Temperature Control (ATC) ...... 62
Operating Tips ............................................. 63
WINDOWS ............................................................ 64
Power Windows — If Equipped .................... 64
Wind Buffeting ............................................ 66
HOOD .................................................................... 66
To Open The Hood ...................................... 66
To Close The Hood ....................................... 67
GARAGE DOOR OPENER — IF EQUIPPED ........ 67
Before You Begin Programming
HomeLink® .................................................. 68 Canadian/Gate Operator Programming ..... 70
Using HomeLink®........................................ 71
Security......................................................... 71
Troubleshooting Tips ................................... 71
General Information .................................... 72
INTERNAL EQUIPMENT ........................................ 72
Storage ......................................................... 72
Cupholders .................................................. 77
Electrical Power Outlets ............................ 78
Power Inverter — If Equipped ..................... 80
Wireless Charging Pad — If Equipped ........ 81
Overhead Sunglass Storage ....................... 81
GETTING TO KNOW YOUR INSTRUMENT PANEL
BASE / MIDLINE INSTRUMENT CLUSTER..........82Base / Midline Instrument Cluster
Descriptions ................................................. 83
PREMIUM INSTRUMENT CLUSTER .....................85
Premium Instrument Cluster
Descriptions ................................................. 86
DIESEL INSTRUMENT CLUSTER .........................87
DIESEL INSTRUMENT CLUSTER ................ 88
INSTRUMENT CLUSTER .......................................90
Diesel INSTRUMENT CLUSTER .................. 91
INSTRUMENT CLUSTER DISPLAY .......................92
Instrument Cluster Display Controls .......... 92
Oil Life Reset ............................................... 93
Display Menu Items ..................................... 94
Diesel Messages And Warnings —
6.7L Cummins Diesel Engine ................... 103 Battery Saver On/Battery Saver Mode
Message — Electrical Load Reduction Actions
— If Equipped .......................................... 107
WARNING LIGHTS AND MESSAGES ............... 108
Red Warning Lights ................................... 108
Yellow Warning Lights ............................... 111Yellow Indicator Lights .............................. 115
Green Indicator Lights ............................... 116White Indicator Lights ............................... 117Blue Indicator Lights ................................. 118

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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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FUEL REQUIREMENTS — GAS ENGINE .......... 399 6.4L Engine ................................................399
Reformulated Gasoline ........................ 399Materials Added To Fuel .........................400
Gasoline/Oxygenate Blends ....................400
Do Not Use E-85 In Non-Flex
Fuel Vehicles ..............................................400 CNG And LP Fuel System
Modifications .............................................400 MMT In Gasoline ........................................401
Fuel System Cautions ................................401Carbon Monoxide Warnings ....................401
FUEL REQUIREMENTS – DIESEL ENGINE .. 402
Fuel Specifications ...................................402
Biodiesel Fuel Requirements ....................403
VEHICLE SPECIFCATIONS ................................. 404
FLUID CAPACITIES — GAS ENGINE ............... 405
FLUID CAPACITIES — DIESEL ENGINE ......... 405
FLUIDS AND LUBRICANTS — GAS ENGINE .... 407 Engine ........................................................ 407
Chassis .....................................................409
FLUIDS AND LUBRICANTS —
DIESEL ENGINE ................................................. 410
Engine ........................................................ 410
Chassis .......................................................412
MOPAR ACCESSORIES .................................... 413
Authentic Accessories By Mopar .............413
MULTIMEDIA
UCONNECT SYSTEMS .......................................414
CYBERSECURITY ............................................... 414
UCONNECT SETTINGS .......................................415 Uconnect 3 Settings .................................. 415Uconnect 4/4C/4C NAV Settings ............. 430Uconnect 4C NAV With 12-inch Display
Settings ...................................................... 449
SAFETY AND GENERAL INFORMATION ........... 467
Safety Guidelines....................................... 467
UCONNECT 3 WITH 5-INCH DISPLAY ..............468
Introduction................................................ 468
Radio Mode ................................................ 469
Media Mode ............................................... 472Phone Mode ............................................... 474
STEERING WHEEL AUDIO CONTROLS — IF
EQUIPPED ......................................................... 481
Radio Operation ......................................... 481
Media Mode ............................................... 481
IPOD®/USB/MP3 CONTROL —
IF EQUIPPED ....................................................481
RADIO OPERATION AND MOBILE PHONES ...483
Regulatory And Safety Information........... 484 VOICE RECOGNITION QUICK TIPS ................. 485
Introducing Uconnect ................................ 485
Get Started................................................. 485Basic Voice Commands ............................ 485Radio .......................................................... 486
Media ......................................................... 488Phone ......................................................... 489Voice Text Reply — If Equipped ................. 490
Climate (4C/4C NAV)................................. 491Navigation (4C NAV) .................................. 492
SiriusXM Guardian™ (4C/4C NAV) —
If Equipped ................................................. 492 Register (4C/4C NAV)................................ 493
Mobile App (4C/4C NAV) ........................... 493
SiriusXM® Travel Link (4C NAV) ............... 494Siri® Eyes Free — If Equipped ................. 495
Using Do Not Disturb ................................ 496
Android Auto™ — If Equipped .................. 496Apple CarPlay® — If Equipped ................. 497
General Information .................................. 498
Additional Information............................... 499

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14GETTING TO KNOW YOUR VEHICLE
To Lock The Doors
If the vehicle is equipped with remote power
door locks, push and release the lock button on
the key fob to lock all doors. The turn signal
lights will flash and the horn will chirp to
acknowledge the signal.
Sound Horn With Remote Key Lock
This feature will cause the horn to chirp when
the doors are locked with the key fob. This
feature can be turned on or turned off.
NOTE:
Pushing the lock button on the key fob while you
are in the vehicle will activate the vehicle secu -
rity alarm system. Opening a door with the
vehicle security alarm system activated will
cause the alarm to sound. Push the unlock
button to deactivate the vehicle security alarm
system.
Refer to “Instrument Cluster Display” in
“Getting To Know Your Instrument Panel” for
further information.
Using The Panic Alarm
To turn the Panic Alarm feature on or off, push
the Panic button on the key fob. When the Panic
Alarm is activated, the turn signals will flash, the
horn will pulse on and off, and the interior lights
will turn on.
The Panic Alarm will stay on for three minutes
unless you turn it off by either pushing the Panic
button a second time or driving the vehicle at a
speed of 15 mph (24 km/h) or greater.
NOTE:
The interior lights will turn off if you place the
ignition in the ACC or ON/RUN position while
the Panic Alarm is activated. However, the
exterior lights and horn will remain on.
You may need to be less than 35 ft (11 m)
from the vehicle when using the key fob to
turn off the Panic Alarm due to the radio
frequency noises emitted by the system.
Replacing The Battery In The Key Fob With
Remote Control
The replacement battery model is one CR2032
battery. NOTE:
Perchlorate Material — special handling may
apply. See
www.dtsc.ca.gov/hazard -
ouswaste/perchlorate for further informa -
tion.
Do not touch the battery terminals that are
on the back housing or the printed circuit
board.

1. Remove the emergency key by pushing and holding the release button located on
the side of the key fob while pulling the
emergency key out with your other hand.

Emergency Key Release button

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18GETTING TO KNOW YOUR VEHICLE
The engine only runs when the ignition is in the
ON/RUN position, or from a remote start
request.
In case the ignition switch does not change with
the push of a button, the key fob may have a low
or depleted battery. In this situation, a back up
method can be used to operate the ignition
switch. Put the nose side (side opposite of the
emergency key) of the key fob against the
START/STOP ignition button and push to
operate the ignition switch.
Back Up Starting Method

NOTE:
The key fob may not be able to be detected by
the vehicle keyless-go system if it is located next
to a mobile phone, laptop or other electronic
device; these devices may block the key fob’s
wireless signal and prevent the keyless-go
system from starting the vehicle.
NOTE:
Refer to "Starting The Engine" in "Starting And
Operating" for further information.
REMOTE START — IF EQUIPPED
(GASOLINE)
This system uses the key fob to start
the engine conveniently from outside
the vehicle while still maintaining
security. The system has a range of
approximately 300 ft (91 m).
NOTE:
Obstructions between the vehicle and the key
fob may reduce this range.
How To Use Remote Start
All of the following conditions must be met
before the engine will remote start:
Gear selector 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
Do not leave children or animals inside
parked vehicles in hot weather. Interior
heat build-up may cause serious injury or
death.
CAUTION!
An unlocked vehicle is an invitation for
thieves. Always remove key fob from the
vehicle and lock all doors when leaving the
vehicle unattended.
WARNING! (Continued)

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GETTING TO KNOW YOUR VEHICLE19
System not disabled from previous remote
start event
Vehicle security alarm not active
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 Cancelled — Door Open
Remote Start Cancelled — Hood Open
Remote Start Cancelled — Fuel Low
Remote Start Cancelled — System Fault
Remote Start Disabled — Start Vehicle to
Reset
The instrument cluster display message stays
active 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,
vehicle doors will lock, and the horn
will chirp twice (if programmed). Once the
vehicle has started, the engine will run for
15 minutes.
NOTE:
If your power door locks were unlocked,
Remote Start will automatically lock the
doors.
If an engine fault is present or fuel level is
low, the vehicle will start and then shut down
in 10 seconds.
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.
The engine can be started two consecutive
times (two 15 minute cycles) with the key
fob. However, the ignition must be placed in
the ON/RUN position before you can repeat
the start sequence for a third cycle.
To Exit Remote Start Mode Without Driving
The Vehicle
Push and release the remote start button one
time or allow the engine to run for the entire
15 minute cycle.
NOTE:
To avoid unintentional shutdowns, the system
will disable for two seconds after receiving a
valid Remote Start request.
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.
2

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20GETTING TO KNOW YOUR VEHICLE
To Exit Remote Start Mode And Drive The
Vehicle
Before the end of the 15 minute cycle, push and
release the unlock button on the key fob to
unlock the doors and disarm the vehicle secu -
rity alarm system (if equipped). Then, prior to
the end of the 15 minute cycle, place the igni -
tion in the ON/RUN position.
Remote Start Comfort Systems — If
Equipped
When remote start is activated, the heated
steering wheel, and driver heated seat features
will automatically turn on in cold weather. In
warm weather, the driver vented seat feature
will automatically turn on when the remote start
is activated. These features will stay on through
the duration of remote start or until the ignition
switch is placed in the ON/RUN position.
NOTE:
The Remote Start Comfort System can be acti -
vated and deactivated through the Uconnect
System. Refer to “Uconnect Settings” in “Multi -
media” for further information on Remote Start
Comfort System operation.
General Information
The following regulatory statement applies to all
Radio Frequency (RF) devices equipped in this
vehicle:
This device complies with Part 15 of the FCC
Rules and with Innovation, Science and
Economic Development Canada license-exempt
RSS standard(s). Operation is subject to the
following two conditions:

1. This device may not cause harmful interfer -
ence, and

2. This device must accept any interference received, including interference that may
cause undesired operation.
Le présent appareil est conforme aux CNR
d`Innovation, Science and Economic Develop -
ment applicables aux appareils radio exempts
de licence. L'exploitation est autorisée aux deux
conditions suivantes:

1. l'appareil ne doit pas produire de brouil -
lage, et

2. l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le
brouillage est susceptible d'en comprom -
ettre le fonctionnement. La operación de este equipo está sujeta a las
siguientes dos condiciones:

1. es posible que este equipo o dispositivo no
cause interferencia perjudicial y

2. este equipo o dispositivo debe aceptar cual -
quier interferencia, incluyendo la que
pueda causar su operación no deseada.
NOTE:
Changes or modifications not expressly
approved by the party responsible for compli -
ance could void the user’s authority to operate
the equipment.
REMOTE START — IF EQUIPPED (DIESEL)
This system uses the key fob to start
the engine conveniently from outside
the vehicle while still maintaining
security. The system has a range of
approximately 300 ft (91 m).
NOTE:
Obstructions between the vehicle and the
key fob may reduce this range.

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