ECU Ram 3500 2020 Owner's Guide

GETTING TO KNOW YOUR VEHICLE85
2. Unfold both the legs using the straps.

Load Floor Legs In Opened Position

3. Lift the front panel until the load floor unfolds into position.

Load Floor In Open Position

4. Reverse the procedure to store the load floor. Positioning The Load Floor For Storage Access
Under The Seat

1. Lift the 60/40 seat cushion(s) to the
upward position.

2. Unsnap the securing snap located at either side of the load floor.
3. Lift the load floor up to access storage under the load floor.

Load Floor Securing Straps/Crew Cab
4. Reverse the procedure to put the load floor
back in the secured down position before
you operate the vehicle.
Below Rear Seat Storage (Crew Cab)
The Crew Cab models provide additional
storage under the rear seats. Lift the seats to
access the storage compartment.
To open the storage compartments, unsnap the
securing snap located at either side of the load
floor and lift upward on the fold flat lid.

Crew Cab Storage

NOTE:
For more information on storage and the fold
flat floor, refer to “Fold Flat Load Floor” in this
section.
WARNING!
Do not drive with the load floor in the up
position. When stopping fast or in an
accident, the load floor could move to the
down position causing serious injury.
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GETTING TO KNOW YOUR VEHICLE93
(Continued)
To open a storage bin with the RamBox
unlocked, push and release the button located
on the lid. The RamBox lid will open upward to
allow hand access. Lift the lid to fully open.
NOTE:
RamBox will not open when the button is
pushed if the RamBox is locked.
RamBox Pushbutton And Lock
The interior of the RamBox will automatically
illuminate when the lid is opened. In addition to
the automatic illumination, there is a manual
on/off switch located at the rear of each storage
bin. Pushing the switch once will turn off the bin
lights, pushing the switch again will turn the
lights back on.

RamBox Light Switch
Cargo bins feature two removable drain plugs
(to allow water to drain from bins). To remove
plug, pull up on the edge. To install, push the
plug downward into drain hole.
NOTE:
Provisions are provided in the bins for cargo
dividers and shelf supports. These accessories
(in addition to other RamBox accessories) are
available from Mopar.Locking And Unlocking RamBox
Push and release the lock or unlock button on
the key fob to lock and unlock all doors, the
tailgate and the RamBox (if equipped). Refer to
“Keys” in this chapter for further details. The
RamBox storage bins can be locked using the
vehicle key. To lock and unlock the storage bin,
insert the key into the keyhole on the push
button and turn clockwise to lock or
counterclockwise to unlock. Always return the
key to the upright (vertical) position before
removing the key from the push button.
CAUTION!

Failure to follow the following items could
cause damage to the vehicle:
Assure that all cargo inside the storage bins
is properly secured.
Do not exceed cargo weight rating of 300 lbs
(136 kg) for 2500 and 3500 series vehicles
per bin.

CAUTION!
Leaving the lid open for extended periods of
time could cause the vehicle battery to
discharge. If the lid is required to stay open
for extended periods of time, it is
recommended that the bin lights be turned
off manually using the on/off switch.
CAUTION!
Ensure cargo bin lids are closed and
latched before moving or driving vehicle.
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94GETTING TO KNOW YOUR VEHICLE
(Continued)
RAMBOX SAFETY WARNING
Carefully follow these warnings to help prevent
personal injury or damage to your vehicle:
RamBox Storage Bin Cover Emergency
Release Lever — If Equipped
As a security measure, a Storage Bin Cover
Emergency Release is built into the storage bin
cover latching mechanism.
Storage Bin Cover Emergency Release Lever

NOTE:
In the event of an individual being locked inside
the storage bin, the storage bin cover can be
opened from inside of the bin by pulling on the
glow-in-the-dark lever attached to the storage
bin cover latching mechanism.
BED DIVIDER — IF EQUIPPED
The bed divider has two functional positions:
Storage Position
Divider Position
Loads applied to the top of the bin lid
should be minimized to prevent damage to
the lid and latching/hinging mechanisms.
Damage to the RamBox bin may occur due
to heavy/sharp objects placed in bin that
shift due to vehicle motion. In order to mini -
mize potential for damage, secure all cargo
to prevent movement and protect inside
surfaces of bin from heavy/sharp objects
with appropriate padding.
WARNING!
Always close the storage bin covers when
your vehicle is unattended.
Do not allow children to have access to the
storage bins. Once in the storage bin, young
children may not be able to escape. If
trapped in the storage bin, children can die
from suffocation or heat stroke.
CAUTION! (Continued)
In an accident, serious injury could result if
the storage bin covers are not properly
latched.
Do not drive the vehicle with the storage bin
covers open.
Keep the storage bin covers closed and
latched while the vehicle is in motion.
Do not use a storage bin latch as a
tie-down.
WARNING! (Continued)

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GETTING TO KNOW YOUR VEHICLE95
Storage Position
The storage position for the bed divider is at the
front of the truck bed which maximizes the bed
cargo area when not in use.
To install the bed divider into the storage
position, perform the following:

1. Make sure the center handle is unlocked
using the vehicle key and rotate the center
handle vertically to release the divider side
gates.

Center Handle And Lock
2. With the side gates open, position the
divider fully forward in the bed against the
front panel.

Storage Position

3. Rotate the side gates closed allowing the outboard ends to be positioned in front of
the cargo tie-down loops.

Cargo Tie-Down Loop
4. Rotate the center handle horizontally to
secure the side gates in the closed position.

Side Gates Closed

5. Lock the center handle using the vehicle key to secure the panel into place.
Divider Position
The divider position is intended for managing
your cargo and assisting in keeping cargo from
moving around the bed. There are 11 divider
slots along the bed inner panels which allow for
various positions to assist in managing your
cargo.
1 — Center Handle Lock
2 — Handle
3 — Unlocked Position
4 — Locked Position
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96GETTING TO KNOW YOUR VEHICLE
To install the bed divider into a divider position,
perform the following:

1. Make sure the center handle is unlocked
using the vehicle key and rotate the center
handle vertically to release the divider side
gates.

2. With the side gates open, position the divider so the outboard ends align with the
intended slots in the sides of the bed.

Aligning Gate To Slots

3. Rotate the side gates closed so that the outboard ends are secured into the
intended slots of the bed.
4. Rotate the center handle horizontally to secure the side gates in the closed position.
Side Gates Closed

5. Lock the center handle to secure the panel into place.
BED RAIL TIE-DOWN SYSTEM — IF
E
QUIPPED
NOTE:
This feature is only available for vehicles
equipped with a RamBox.
There are two adjustable cleats on each side of
the bed that can be used to assist in securing
cargo.

Adjustable Cleats

Each cleat must be located and tightened down
in one of the detents, along either rail, in order
to keep cargo properly secure.
To move the cleat to any position on the rail,
turn the nut counterclockwise several turns.
Then pull out on the cleat and slide it to the
detent nearest the desired location. Make sure
the cleat is seated in the detent and tighten the
nut.
CAUTION!

The maximum load per cleat should not exceed
250 lbs (113 kg) and the angle of the load on
each cleat should not exceed 45 degrees
above horizontal, or damage to the cleat or
cleat rail may occur.

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100GETTING TO KNOW YOUR VEHICLE
TRI-FOLD TONNEAU COVER — IF EQUIPPED
Your vehicle may be equipped with a Tri-Fold
Tonneau Cover which consists of different
features:
Easy Tri-Fold cover
Tonneau fore aft locator
Crossbar inside bed locator
Front and rear clamps
Stowage strap
Locking capability
NOTE:
The Tonneau Cover can be folded up and
secured at the front of the box without removing
it completely.
TRI-FOLD TONNEAU COVER REMOVAL
To remove the Tonneau Cover, follow the next
steps:

1. Open the tailgate to gain access to the rear pair of Tonneau Cover clamps located on
the underside of the cover (left and right
side).
Clamped Position

NOTE:
If clamp wire is damaged replace immediately.
2. Pull both clamp handles down to release the Tonneau Cover’s rear panel.

Released Position
3. From the released position, send the
clamps to the Stowed Position by pushing
from the yellow bumper up. Listen for a
“clicking” sound to confirm the clamp has
been properly stowed.

Stowed Position

CAUTION!
Make sure the Tonneau Cover clamp and
clamp wire are in the proper stowed position.
If the clamp and clamp wire are not properly
stowed, damage to the Tonneau Cover
material will result.

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128GETTING TO KNOW YOUR INSTRUMENT PANEL
Diesel Exhaust Fluid (DEF) Fault Warning
Messages
There are five different messages which are
displayed if the vehicle detects that the DEF
system has been filled with a fluid other than
DEF, has experienced component failures, or
when tampering has been detected. The vehicle
may be limited to a maximum speed of 5 MPH
(8 km/H) if the DEF system is not serviced
within less than 200 miles (322 km) of the fault
being detected.
When the DEF system needs to be serviced the
following warnings will display:
Service DEF System See Dealer — This
message will display when the fault is initially
detected, each time the vehicle is started,
and periodically during driving. The message
will be accompanied by a single chime. We
recommend you drive to your nearest autho -
rized dealer and have your vehicle serviced
as soon as possible.

5 MPH Max Speed in 150 mi Service DEF
System See Dealer — This message will display
if the DEF system has not been serviced after
the “Service DEF System – See Dealer”
message is displayed. This message will
continuously display until the mileage counter reaches zero, and will be accompanied by a
periodic chime. The message will continue to
countdown until it reaches zero unless the
vehicle is serviced. We recommend you drive
to your nearest authorized dealer and have
your vehicle serviced immediately.

NOTE:
Under some circumstances this mileage
counter may start with a value of less than
150 miles (241 km). For example, if recurring faults are detected in a time interval of less
than 40 hours, the counter may restart at the
value where it stopped when a previous fault
was temporarily remedied, or at a minimum of
50 miles (80 km).
5 MPH Max Speed on Restart, Long Idle or
Refuel Service DEF See Dealer — This
message will continuously display when the
mileage counter reaches zero, and will be
accompanied by a periodic chime.
The vehicle will only be capable of a
maximum speed of 5 MPH upon the first of
the following conditions to occur:
If the vehicle is shutoff and restarted.

If the vehicle is idled for an extended period
of time, approximately one hour or greater.

If the system detects that the level of fuel
in the tank has increased.
5 MPH Max Speed Service DEF System See
Dealer — This message will continuously
display, and will be accompanied by a peri -
odic chime. Although the vehicle can be
started and placed in gear, the vehicle will
only operate at a maximum speed of 5 MPH.
Your vehicle will require towing, see an
authorized dealer for service.
NOTE:
When this message is displayed, the engine can
still be started. However, the vehicle will only
operate at a maximum speed of 5 MPH.
Incorrect DEF Detected See Dealer — This
message will display when the fault is initially
detected, each time the vehicle is started,
and periodically during driving. The message
will be accompanied by a single chime. We
recommend you drive to your nearest autho -
rized dealer and have your vehicle serviced
as soon as possible.
RAM Active Air System
Your vehicle is equipped with an advanced Ram
Active Air system that provides enhanced
performance, especially when towing under

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130GETTING TO KNOW YOUR INSTRUMENT PANEL
The battery was recently replaced and was
not charged completely.
The battery was discharged by an electrical
load left on when the vehicle was parked.
The battery was used for an extended period
with the engine not running to supply radio,
lights, chargers, +12 Volts portable appli-
ances like vacuum cleaners, game consoles
and similar devices.
What to do when an electrical load reduction
action message is present (“Battery Saver On”
or “Battery Saver Mode”)
During a trip:
Reduce power to unnecessary loads if
possible:
Turn off redundant lights (interior or
exterior).
Check what may be plugged in to power
outlets +12 Volts, 115 Volts AC, USB
ports.
Check HVAC settings (blower, tempera -
ture).
Check the audio settings (volume). After a trip:
Check if any aftermarket equipment was
installed (additional lights, upfitter electrical
accessories, audio systems, alarms) and
review specifications if any (load and Ignition
Off Draw currents).
Evaluate the latest driving cycles (distance,
driving time and parking time).
The vehicle should have service performed if
the message is still present during consecu
-
tive trips and the evaluation of the vehicle
and driving pattern did not help to identify the
cause.
WARNING LIGHTS AND MESSAGES
The warning/indicator lights will illuminate in
the instrument panel together with a dedicated
message and/or acoustic signal when
applicable. These indications are indicative and
precautionary and as such must not be
considered as exhaustive. Always refer to the
information in this chapter in the event of a
failure indication. All active telltales will display
first if applicable. The system check menu may
appear different based upon equipment
options and current vehicle status. Some
telltales are optional and may not appear.
RED WARNING LIGHTS
Seat Belt Reminder Warning Light
This warning light indicates when the
driver or passenger seat belt is
unbuckled. When the ignition is first
placed in the ON/RUN or ACC/ON/
RUN position and if the driver’s seat belt is
unbuckled, a chime will sound and the light will
turn on. When driving, if the driver or front
passenger seat belt remains unbuckled, the
Seat Belt Reminder Light will flash or remain on
continuously and a chime will sound.
Refer to “Occupant Restraint Systems” in
“Safety” for further information.
Air Bag Warning Light
This warning light will illuminate to
indicate a fault with the air bag, and
will turn on for four to eight seconds
as a bulb check when the ignition is
placed in the ON/RUN or ACC/ON/RUN
position. This light will illuminate with a single
chime when a fault with the air bag has been
detected, it will stay on until the fault is cleared.
If the light is either not on during startup, stays

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132GETTING TO KNOW YOUR INSTRUMENT PANEL
Hood Open Warning Light
This warning light will illuminate when
the hood is ajar/open and not fully
closed.
NOTE:
If the vehicle is moving, there will also be a
single chime.
Vehicle Security Warning Light — If
Equipped
This light will flash at a fast rate for
approximately 15 seconds when the
vehicle security alarm is arming, and
then will flash slowly until the vehicle
is disarmed.
Engine Coolant Temperature Warning
Light
This warning light warns of an
overheated engine condition. If the
engine coolant temperature is too
high, this indicator will illuminate and
a single chime will sound. If the temperature
reaches the upper limit, a continuous chime will
sound for four minutes or until the engine is
able to cool; whichever comes first. If the light turns on while driving, safely pull over
and stop the vehicle. If the Air Conditioning
(A/C) system is on, turn it off. Also, shift the
transmission into NEUTRAL and idle the vehicle.
If the temperature reading does not return to
normal, turn the engine off immediately and call
for service.
Refer to “If Your Engine Overheats” in “In Case
Of Emergency” for further information.
Battery Charge Warning Light
This warning light will illuminate when
the battery is not charging properly. If
it stays on while the engine is running,
there may be a malfunction with the
charging system. Contact an authorized dealer
as soon as possible.
This indicates a possible problem with the
electrical system or a related component.
Oil Pressure Warning Light
This warning light will illuminate to
indicate low engine oil pressure. If the
light turns on while driving, stop the
vehicle, shut off the engine as soon as
possible, and contact an authorized dealer. A
chime will sound when this light turns on. Do not operate the vehicle until the cause is
corrected. This light does not indicate how
much oil is in the engine. The engine oil level
must be checked under the hood.
Oil Temperature Warning Light
This warning light will illuminate to
indicate the engine oil temperature is
high. If the light turns on while driving,
stop the vehicle and shut off the
engine as soon as possible. Wait for oil
temperature to return to normal levels.
Electronic Throttle Control (ETC) Warning
Light
This warning light will illuminate to
indicate a problem with the Electronic
Throttle Control (ETC) system. If a
problem is detected while the vehicle
is running, the light will either stay on or flash
depending on the nature of the problem. Cycle
the ignition when the vehicle is safely and
completely stopped and the transmission is
placed in the PARK (P) position. The light should
turn off. If the light remains on with the vehicle
running, your vehicle will usually be drivable;
however, see an authorized dealer for service
as soon as possible.

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142GETTING TO KNOW YOUR INSTRUMENT PANEL
BLUE INDICATOR LIGHTS
High Beam Indicator Light
This indicator light will illuminate to
indicate that the high beam
headlights are on. With the low beams
activated, push the multifunction
lever forward (toward the front of the vehicle) to
turn on the high beams. Pull the multifunction
lever rearward (toward the rear of the vehicle) to
turn off the high beams. If the high beams are
off, pull the lever toward you for a temporary
high beam on, "flash to pass" scenario.
ONBOARD DIAGNOSTIC SYSTEM — OBD II
Your vehicle is equipped with a sophisticated
Onboard Diagnostic system called OBD II. This
system monitors the performance of the
emissions, engine, and transmission control
systems. When these systems are operating
properly, your vehicle will provide excellent
performance and fuel economy, as well as
engine emissions well within current
government regulations.
If any of these systems require service, the OBD
II system will turn on the Malfunction Indicator
Light (MIL). It will also store diagnostic codes and other information to assist your service
technician in making repairs. Although your
vehicle will usually be drivable and not need
towing, see an authorized dealer for service as
soon as possible.
ONBOARD DIAGNOSTIC SYSTEM
(OBD II) C
YBERSECURITY
Your vehicle is required to have an Onboard
Diagnostic system (OBD II) and a connection
port to allow access to information related to
the performance of your emissions controls. Authorized service technicians may need to
access this information to assist with the
diagnosis and service of your vehicle and
emissions system.
For further information, refer to “Cybersecurity”
in “Multimedia”.
CAUTION!
Prolonged driving with the MIL on could
cause further damage to the emission
control system. It could also affect fuel
economy and driveability. The vehicle must
be serviced before any emissions tests can
be performed.
If the MIL is flashing while the vehicle is
running, severe catalytic converter damage
and power loss will soon occur. Immediate
service is required.
WARNING!
ONLY an authorized service technician
should connect equipment to the OBD II
connection port in order to read the VIN,
diagnose, or service your vehicle.
If unauthorized equipment is connected to
the OBD II connection port, such as a
driver-behavior tracking device, it may:
Be possible that vehicle systems,
including safety related systems, could
be impaired or a loss of vehicle control
could occur that may result in an acci
-
dent involving serious injury or death.
Access, or allow others to access, infor -
mation stored in your vehicle systems,
including personal information.

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