instrument panel Ram 2500 2020 Workshop Manual

138GETTING TO KNOW YOUR INSTRUMENT PANEL
Diesel Exhaust Brake Indicator Light — If
Equipped
This indicator light will illuminate
when the Diesel Exhaust Brake has
been activated, and is in full strength
mode.
Refer to “Diesel Exhaust Brake (Engine
Braking)” in “Starting And Operating” for further
information.
Sway Bar Indicator Light — If Equipped
This indicator light will illuminate
when the front sway bar is discon -
nected.
Refer to “Stabilizer/Sway Bar System — Power
Wagon Only” in “Starting And Operating” for
further information.
Snowplow Mode Indicator Light — If Equipped
This indicator light will illuminate
when Snowplow Mode has been acti -
vated.
Refer to “Snowplow” in “Starting And Oper -
ating” for further information.
Air Suspension Alternate Trailer Height
Indicator Light — If Equipped
This light will illuminate when the air
suspension system is set to the Alter -
nate Trailer Height setting.
Refer to “Air Suspension System — If Equipped”
in “Starting And Operating” for further informa -
tion.
Air Suspension Bed Lowering Mode Indicator
Light — If Equipped
This light will illuminate when the Bed
Lowering Mode procedure is
complete.
Refer to “Air Suspension System — If Equipped”
in “Starting And Operating” for further informa -
tion.
Air Suspension Ride Height Raising Indicator
Light — If Equipped
This light will blink and alert the driver
that the vehicle is changing to a
higher ride height.
Refer to “Air Suspension System — If Equipped”
in “Starting And Operating” for further informa -
tion.
Air Suspension Ride Height Lowering
Indicator Light — If Equipped
This light will blink and alert the driver
that the vehicle is changing to a lower
ride height.
Refer to “Air Suspension System — If Equipped”
in “Starting And Operating” for further informa -
tion.
Front And Rear Axle Lock Indicator Light
This light indicates when the front,
rear, or both axles have been locked.
The telltale will display the lock icon
on the front and rear axles to indicate
the current lock status.
Rear Axle Lock Indicator Light
This light indicates when the rear axle
lock has been activated.
Refer to “Four Wheel Drive Operation — If
Equipped” in “Starting And Operating” for
further information.

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GETTING TO KNOW YOUR INSTRUMENT PANEL139
4WD Lock Indicator Light
This light alerts the driver that the
vehicle is in the four-wheel drive LOCK
mode. The front and rear driveshafts
are mechanically locked together,
forcing the front and rear wheels to rotate at the
same speed.
Refer to “Four-Wheel Drive Operation” in
“Starting And Operating” for further information
on four-wheel drive operation and proper use.
4WD Low Indicator Light — If Equipped
This light alerts the driver that the
vehicle is in the four-wheel drive LOW
mode. The front and rear driveshafts
are mechanically locked together
forcing the front and rear wheels to rotate at the
same speed. Low range provides a greater gear
reduction ratio to provide increased torque at
the wheels.
Refer to “Four-Wheel Drive Operation — If
Equipped” in “Starting And Operating” for
further information on four-wheel drive opera -
tion and proper use.
4WD High Indicator Light — If Equipped
This light alerts the driver that the
vehicle is in the four-wheel drive HIGH
mode. The front and rear driveshafts
are mechanically locked together
forcing the front and rear wheels to rotate at the
same speed.
NEUTRAL Indicator Light — If Equipped
This light alerts the driver that the
4WD power transfer case is in the
NEUTRAL mode and the front and rear
driveshafts are disengaged from the
powertrain.
Low Diesel Exhaust Fluid (DEF) Indicator
Light — If Equipped
The Low Diesel Exhaust Fluid (DEF)
Indicator will illuminate if the vehicle
is low on Diesel Exhaust Fluid (DEF).
Refer to “Starting And Operating” for
further information.
Wait To Start Light — If Equipped
This indicator light will illuminate for
approximately two seconds when the
ignition is turned to the RUN position.
Its duration may be longer based on colder operating conditions. Vehicle will not
initiate start until telltale is no longer displayed.
Refer to “Starting The Engine” in “Starting And
Operating” for further information.
NOTE:
The “Wait To Start” telltale may not illuminate if
the intake manifold temperature is warm
enough.
Water In Fuel Indicator Light — If Equipped
The “Water In Fuel Indicator Light” will
illuminate when there is water
detected in the fuel filter. If this light
remains on, DO NOT start the vehicle
before you drain the water from the fuel filter to
prevent engine damage.
Refer to the “Draining Fuel/Water Separator
Filter” section in “Dealer Service” in “Servicing
And Maintenance” for further information.
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140GETTING TO KNOW YOUR INSTRUMENT PANEL
Green Indicator Lights
Adaptive Cruise Control (ACC) Set With Target
Light — If Equipped
This will display when the ACC is set
and a target vehicle is detected.
Refer to “Adaptive Cruise Control
(ACC) — If Equipped” in “Starting And
Operating” for further information.
Adaptive Cruise Control (ACC) Set With No
Target Detected Indicator Light — If Equipped
This light will turn on when the Adap -
tive Cruise Control is SET and there is
no target vehicle detected.
Refer to "Adaptive Cruise Control (ACC) — If
Equipped" in "Starting And Operating" for
further information.
Automatic Diesel Exhaust Brake Indicator
Light — If Equipped
This indicator light will illuminate
when the Diesel Exhaust Brake has
been activated, and has switched to
Automatic mode.
Refer to “Diesel Exhaust Brake — Engine
Braking (If Equippes)” in “Starting And Oper -
ating” for further information.
ECO Mode Indicator Light
This light will turn on when ECO Mode
is active.
Park/Headlight On Indicator Light
This indicator light will illuminate
when the park lights or headlights are
turned on.
Refer to “Exterior Lights” in “Getting To Know
Your Vehicle” for further information.
LaneSense Indicator Light — If Equipped
The LaneSense indicator light illumi -
nates solid green when both lane
markings have been detected and the
system is “armed” and ready to
provide visual and torque warnings if an unin -
tentional lane departure occurs.
Refer to “LaneSense — If Equipped” in “Starting
And Operating” for further information.
Front Fog Indicator Light — If Equipped
This indicator light will illuminate
when the front fog lights are on.
Refer to “Exterior Lights” in “Getting
To Know Your Vehicle” for further
information.
Turn Signal Indicator Lights
When the left or right turn signal is
activated, the turn signal indicator will
flash independently and the corre -
sponding exterior turn signal lamps
will flash. Turn signals can be activated when
the multifunction lever is moved down (left) or
up (right).
NOTE:
A continuous chime will sound if the vehicle is
driven more than 1 mile (1.6 km) with either
turn signal on.
Check for an inoperative outside light bulb if
either indicator flashes at a rapid rate.
If equipped with fog lamps, the fog lamp on
the side of the activated turn signal will also
illuminate to provide additional light when
turning.

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GETTING TO KNOW YOUR INSTRUMENT PANEL141
Cruise Control Set Indicator Light — If
Equipped
This indicator light will illuminate
when the cruise control is set to the
desired speed. Refer to “Speed
Control” in “Starting And Operating”
for further information.
White Indicator Lights
Adaptive Cruise Control (ACC) Ready Light —
If Equipped
This light will illuminate when the
vehicle equipped with Adaptive Cruise
Control (ACC) has been turned on but
not set.
Refer to “Adaptive Cruise Control (ACC) — If
Equipped” in “Starting And Operating” for
further information.
Cruise Control Ready Indicator
This indicator light will illuminate
when the cruise control is ready, but
not set. Refer to “Speed Control” in
“Starting And Operating” for further
information.
Hill Descent Control (HDC) Indicator Light — If
Equipped
This indicator shows when the Hill
Descent Control (HDC) feature is
turned on. The lamp will be on solid
when HDC is armed. HDC can only be
armed when the transfer case is in the “4WD
LOW” position and the vehicle speed is less
then 20 mph (32 km/h). If these conditions are
not met while attempting to use the HDC
feature, the HDC indicator light will flash on/off.
LaneSense Indicator Light — If Equipped
When the LaneSense system is ON,
but not armed, the LaneSense indi -
cator light illuminates solid white. This
occurs when only left, right, or neither
lane line has been detected. If a single lane line
is detected, the system is ready to provide only
visual warnings if an unintentional lane depar -
ture occurs on the detected lane line.
Refer to “LaneSense — If Equipped” in “Starting
And Operating” for further information.
Blue Indicator Lights
High Beam Indicator Light
This indicator light will illuminate to
indicate that the high beam head -
lights are on. With the low beams acti -
vated, 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 emis -
sions, 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 govern -
ment 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
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142GETTING TO KNOW YOUR INSTRUMENT PANEL
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)
Cybersecurity
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 diag-
nosis and service of your vehicle and emissions
system. For further information, refer to “Cybersecurity”
in “Multimedia”.
EMISSIONS INSPECTION AND
MAINTENANCE PROGRAMS
In some localities, it may be a legal requirement
to pass an inspection of your vehicle's emis
-sions control system. Failure to pass could
prevent vehicle registration.
For states that require an Inspection
and Maintenance (I/M), this check
verifies the “Malfunction Indicator
Light (MIL)” is functioning and is not
on when the engine is running, and that the
OBD II system is ready for testing.
Normally, the OBD II system will be ready. The
OBD II system may not be ready if your vehicle
was recently serviced, recently had a depleted
battery or a battery replacement. If the OBD II
system should be determined not ready for the
I/M test, your vehicle may fail the test.
Your vehicle has a simple ignition actuated test,
which you can use prior to going to the test
station. To check if your vehicle's OBD II system
is ready, you must do the following:

1. Cycle the ignition switch to the ON position, but do not crank or start the engine.

NOTE:
If you crank or start the engine, you will have to
start this test over.
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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GETTING TO KNOW YOUR INSTRUMENT PANEL143
2. As soon as you cycle the ignition switch to
the ON position, you will see the “Malfunc -
tion Indicator Light (MIL)” symbol come on
as part of a normal bulb check.
3. Approximately 15 seconds later, one of two things will happen:
The MIL will flash for about 10 seconds
and then return to being fully illuminated
until you turn OFF the ignition or start the
engine. This means that your vehicle's
OBD II system is not ready and you
should not proceed to the I/M station.
The MIL will not flash at all and will
remain fully illuminated until you place
the ignition in the off position or start the
engine. This means that your vehicle's
OBD II system is ready and you can
proceed to the I/M station. If your OBD II system is not ready,
you should
see an authorized dealer or repair facility. If your
vehicle was recently serviced or had a battery
failure or replacement, you may need to do
nothing more than drive your vehicle as you
normally would in order for your OBD II system
to update. A recheck with the above test routine
may then indicate that the system is now ready.Regardless of whether your vehicle's OBD II
system is ready or not, if the MIL is illuminated
during normal vehicle operation you should
have your vehicle serviced before going to the I/
M station. The I/M station can fail your vehicle
because the MIL is on with the engine running.
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152SAFETY
Disabling And Enabling HSA
This feature can be turned on or turned off. To
change the current setting, proceed as follows:
If disabling HSA using your instrument cluster
display, refer to “Instrument Cluster Display”
in “Getting To Know Your Instrument Panel”
for further information.
If disabling HSA using Uconnect Settings,
refer to “Uconnect Settings” in “Multimedia”
for further information.
For vehicles not equipped with an instrument
cluster display, perform the following steps:

1. Center the steering wheel (front wheels pointing straight forward).

2. Shift the transmission into PARK.
3. Apply the parking brake.
4. Start the engine.
5. Rotate the steering wheel slightly more than one-half turn to the left. 6. Push the “ESC OFF” button located in the
lower switch bank below the climate control
four times within 20 seconds. The “ESC OFF
Indicator Light” should turn on and turn off
two times.
7. Rotate the steering wheel back to center and then an additional slightly more than
one-half turn to the right.
8. Place the ignition in the OFF mode and then back to ON. If the sequence was completed
properly, the “ESC OFF Indicator Light” will
blink several times to confirm HSA is
disabled.
9. Repeat these steps if you want to return this feature to its previous setting.
Towing With HSA
HSA will also provide assistance to mitigate roll
back while towing a trailer.
WARNING!
If you use a trailer brake controller with your
trailer, the trailer brakes may be activated
and deactivated with the brake switch. If
so, there may not be enough brake pres -
sure to hold both the vehicle and the trailer
on a hill when the brake pedal is released.
In order to avoid rolling down an incline
while resuming acceleration, manually acti -
vate the trailer brake or apply more vehicle
brake pressure prior to releasing the brake
pedal.
HSA is not a parking brake. Always apply
the parking brake fully when exiting your
vehicle. Also, be certain to place the trans -
mission in PARK.
Failure to follow these warnings can result
in a collision or serious personal injury.

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158SAFETY

Blind Spot Zones With Trailer Merge Assist

Automatic Trailer Detection
There are two modes of operation for the detec -
tion of the trailer length:
Automatic Mode — When “Auto Mode” is
selected, the system will use the blind spot
sensors to automatically determine the pres -
ence and length of a trailer. The presence of
a trailer will be detected using the blind spot
radar within 90 seconds of forward move -
ment of the vehicle. The vehicle must be
moving above 6 mph (10 km/h) to activate
the feature. Once the trailer has been
detected, the system will default to the
maximum blind spot zone until the length has been verified. You will see “Auto” in the
instrument panel cluster .
Max Mode
— When “Max Mode” is selected,
the system will default to the maximum blind
spot zone regardless of what size trailer is
attached .
NOTE:
Selected setting is stored when the ignition is
placed in the OFF position. To change this
setting, it must be selected through the Ucon -
nect Settings. Refer to “Uconnect Settings” in
“Multimedia” for further information.
Trailer Length Detection
Once the trailer presence has been established,
the trailer length will be established (by making
a 90 degree turn) and then the trailer length
category (e.g. 10-20 ft (3 m to 6 m)) will be
displayed. This can take up to 30 seconds after
completing the turn.
NOTE:
During the same ignition cycle, if the vehicle is
at a standstill for a minimum of 90 seconds, a
new “trailer detection request” is enabled by
the system once the vehicle resumes motion. Maximum length supported by the Trailer Merge
Assist feature is 39.5 ft (12 m). Trailer length is
considered the forward most portion of the
trailer hitch to the rearward most portion of the
body, bumper, or ramp of the trailer.
Maximum width supported by the Trailer Merge
Assist feature is 8.5 ft (2.59 m). Trailer width is
measured at the widest portion of the trailer
and may include wheels, tires, finders, or rails.
NOTE:
Fifth wheel or gooseneck trailers are not
supported by Trailer Merge Assist.

Trailer Length Detection

1 — Vehicle
2 — Trailer
1 — Trailer Length
2 — Trailer Width
3 — Trailer Hitch

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SAFETY181
(Continued)
How To Engage The Automatic Locking Mode

1. Buckle the combination lap and shoulder belt.

2. Grasp the shoulder portion and pull down -
ward until the entire seat belt is extracted.
3. Allow the seat belt to retract. As the seat belt retracts, you will hear a clicking sound.
This indicates the seat belt is now in the
Automatic Locking Mode.
How To Disengage The Automatic Locking Mode
Unbuckle the combination lap/shoulder belt
and allow it to retract completely to disengage
the Automatic Locking Mode and activate the
vehicle sensitive (emergency) locking mode.
Supplemental Restraint Systems (SRS)
Some of the safety features described in this
section may be standard equipment on some
models, or may be optional equipment on
others. If you are not sure, ask an authorized
dealer.
The air bag system must be ready to protect you
in a collision. The Occupant Restraint Controller
(ORC) monitors the internal circuits and inter -
connecting wiring associated with the electrical
Air Bag System Components. Your vehicle may
be equipped with the following Air Bag System
Components:
Air Bag System Components
Occupant Restraint Controller (ORC)
Air Bag Warning Light
Steering Wheel and Column
Instrument Panel
Knee Impact Bolsters
Driver and Front Passenger Air Bags
Seat Belt Buckle Switch
Supplemental Side Air Bags
Front and Side Impact Sensors — If Equipped
Seat Belt Pretensioners
Seat Track Position Sensors
Air Bag Warning Light
The Occupant Restraint Controller
(ORC) monitors the readiness of the
electronic parts of the air bag system
whenever the ignition switch is in the
START or ON/RUN position. If the ignition switch
is in the OFF position or in the ACC position, the
air bag system is not on and the air bags will not
inflate.
WARNING!
The seat belt assembly must be replaced if
the switchable Automatic Locking Retractor
(ALR) feature or any other seat belt function
is not working properly when checked
according to the procedures in the Service
Manual.
Failure to replace the seat belt assembly
could increase the risk of injury in colli -
sions.
Do not use the Automatic Locking Mode to
restrain occupants who are wearing the
seat belt or children who are using booster
seats. The locked mode is only used to
install rear-facing or forward-facing child
restraints that have a harness for
restraining the child.
WARNING! (Continued)
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182SAFETY
The ORC contains a backup power supply
system that may deploy the air bag system even
if the battery loses power or it becomes discon -
nected prior to deployment.
The ORC turns on the Air Bag Warning Light in
the instrument panel for approximately four to
eight seconds for a self-check when the ignition
switch is first in the ON/RUN position. After the
self-check, the Air Bag Warning Light will turn
off. If the ORC detects a malfunction in any part
of the system, it turns on the Air Bag Warning
Light, either momentarily or continuously. A
single chime will sound to alert you if the light
comes on again after initial startup.
The ORC also includes diagnostics that will illu-
minate the instrument panel Air Bag Warning
Light if a malfunction is detected that could
affect the air bag system. The diagnostics also
record the nature of the malfunction. While the
air bag system is designed to be maintenance
free, if any of the following occurs, have an
authorized dealer service the air bag system
immediately.
The Air Bag Warning Light does not come on
during the four to eight seconds when the
ignition switch is first in the ON/RUN position.
The Air Bag Warning Light remains on after
the four to eight-second interval.
The Air Bag Warning Light comes on intermit -
tently or remains on while driving.
NOTE:
If the speedometer, tachometer, or any engine
related gauges are not working, the Occupant
Restraint Controller (ORC) may also be
disabled. In this condition the air bags may not
be ready to inflate for your protection. Have an
authorized dealer service the air bag system
immediately.
Redundant Air Bag Warning Light
If a fault with the Air Bag Warning
Light is detected, which could affect
the Supplemental Restraint System
(SRS), the Redundant Air Bag Warning
Light will illuminate on the instrument panel.
The Redundant Air Bag Warning Light will stay
on until the fault is cleared. In addition, a single
chime will sound to alert you that the Redun -
dant Air Bag Warning Light has come on and a
fault has been detected. If the Redundant Air
Bag Warning Light comes on intermittently or
remains on while driving have an authorized
dealer service the vehicle immediately.
For additional information regarding the Redun -
dant Air Bag Warning Light refer to “Getting To
Know Your Instrument Panel” section of this
manual.
Front Air Bags
This vehicle has front air bags and lap/shoulder
belts for both the driver and front passenger.
The front air bags are a supplement to the seat
belt restraint systems. The driver front air bag is
mounted in the center of the steering wheel.
The passenger front air bag is mounted in the
WARNING!
Ignoring the Air Bag Warning Light in your
instrument panel could mean you won’t have
the air bag system to protect you in a
collision. If the light does not come on as a
bulb check when the ignition is first turned
on, stays on after you start the vehicle, or if it
comes on as you drive, have an authorized
dealer service the air bag system
immediately.

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