Ram 2500 2020 Owner's Manual

STARTING AND OPERATING279
To Cancel
The following conditions cancel the system:
The brake pedal is applied.
The CANCEL button is pushed.
An Anti-Lock Brake System (ABS) event
occurs.
The gear selector is removed from the DRIVE
position.
The Electronic Stability Control/Traction
Control System (ESC/TCS) activates.
The vehicle parking brake is applied.
Driver seatbelt is unbuckled at low speeds.
Driver door is opened at low speeds.
A Trailer Sway Control (TSC) event occurs.
The driver switches ESC to Full Off mode.
The braking temperature exceeds normal
range (overheated).
The trailer brake is applied manually (if
equipped).
To Turn Off
The system will turn off and clear the set speed
in memory if:
The Adaptive Cruise Control (ACC) on/off
button is pushed.
The Normal (Fixed Speed) Cruise Control on/
off button is pushed.
The ignition is placed in the OFF position.
You switch to Four-Wheel Drive Low.
To Resume
If there is a set speed in memory push the RES
(+) button and then remove your foot from the
accelerator pedal. The instrument cluster
display will display the last set speed.
NOTE:
If your vehicle stays at standstill for longer
than two seconds, the driver will have to push
the RES (+) button to reengage the ACC to the
existing set speed.
ACC cannot be resumed if there is a
stationary vehicle in front of your vehicle in
close proximity.
To Vary The Speed Setting
To Increase Speed
While ACC is set, you can increase the set speed
by pushing the RES (+) button.
The speed increment shown is dependent on
the chosen speed unit of U.S. (mph) or Metric
(km/h):
U.S. Speed (mph)
Pushing the RES (+) button once will result in
a 1 mph increase in set speed. Each subse -
quent tap of the button results in an increase
of 1 mph.
If the button is continually pushed, the set
speed will continue to increase in 5 mph
increments until the button is released. The
WARNING!
The Resume function should only be used if
traffic and road conditions permit. Resuming
a set speed that is too high or too low for
prevailing traffic and road conditions could
cause the vehicle to accelerate or decelerate
too sharply for safe operation. Failure to
follow these warnings can result in a collision
and death or serious personal injury.
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280STARTING AND OPERATING
increase in set speed is reflected in the
instrument cluster display.
Metric Speed (km/h)
Pushing the RES (+) button once will result in
a 1 km/h increase in set speed. Each subse -
quent tap of the button results in an increase
of 1 km/h.
If the button is continually pushed, the set
speed will continue to increase in 10 km/h
increments until the button is released. The
increase in set speed is reflected in the
instrument cluster display.
To Decrease Speed
While ACC is set, the set speed can be
decreased by pushing the SET (-) button.
The speed decrement shown is dependent on
the chosen speed unit of U.S. (mph) or Metric
(km/h):
U.S. Speed (mph)
Pushing the SET (-) button once will result in
a 1 mph decrease in set speed. Each subse -
quent tap of the button results in a decrease
of 1 mph.
If the button is continually pushed, the set
speed will continue to decrease in 5 mph decrements until the button is released. The
decrease in set speed is reflected in the
instrument cluster display.
Metric Speed (km/h)
Pushing the SET (-) button once will result in
a 1 km/h decrease in set speed. Each subse -
quent tap of the button results in a decrease
of 1 km/h.
If the button is continually pushed, the set
speed will continue to decrease in 10 km/h
decrements until the button is released. The
decrease in set speed is reflected in the
instrument cluster display.
NOTE:
When you override and push the RES (+)
button or SET (-) buttons, the new set speed
will be the current speed of the vehicle.
When you use the SET (-) button to decel -
erate, if the engine’s braking power does not
slow the vehicle sufficiently to reach the set
speed, the brake system will automatically
slow the vehicle.
The ACC system decelerates the vehicle to a
full stop when following a target vehicle. If an
ACC host vehicle follows a target vehicle to a standstill, after two seconds the driver will
either have to push the RES (+) button, or
apply the accelerator pedal to reengage the
ACC to the existing set speed.
The ACC system maintains set speed when
driving uphill and downhill. However, a slight
speed change on moderate hills is normal. In
addition, downshifting may occur while
climbing uphill or descending downhill. This
is normal operation and necessary to main
-
tain set speed. When driving uphill and down -
hill, the ACC system will cancel if the braking
temperature exceeds normal range (over -
heated).
Setting The Following Distance In ACC
The specified following distance for ACC can be
set by varying the distance setting between four
bars (longest), three bars (long), two bars
(medium) and one bar (short). Using this
distance setting and the vehicle speed, ACC
calculates and sets the distance to the vehicle
ahead. This distance setting displays in the
instrument cluster display.

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Distance Setting 4 Bars (Longest)
Distance Setting 3 Bars (Long) Distance Setting 2 Bars (Medium)
Distance Setting 1 Bar (Short)

The system automatically defaults to the
longest distance setting. To decrease the
distance setting, push the Distance Button and
release. Each time the button is pushed, the
distance setting decreases by one bar. Once the
shortest setting is reached, if the button is pushed again it will reset to the default setting
(longest).
If there is no vehicle ahead, the vehicle will
maintain the set speed. If a slower moving
vehicle is detected in the same lane, the instru
-
ment cluster displays the ACC Set With Target
Indicator Light, and the system adjusts vehicle
speed automatically to maintain the distance
setting, regardless of the set speed.
The vehicle will then maintain the set distance
until:
The vehicle ahead accelerates to a speed
above the set speed.
The vehicle ahead moves out of your lane or
view of the sensor.
The distance setting is changed.
The system disengages. (Refer to “Activating
Adaptive Cruise Control (ACC)” in this
chapter.
The maximum braking applied by ACC is limited;
however, the driver can always apply the brakes
manually, if necessary.
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282STARTING AND OPERATING
NOTE:
The brake lights will illuminate whenever the
ACC system applies the brakes.
A Proximity Warning will alert the driver if ACC
predicts that its maximum braking level is not
sufficient to maintain the set distance. If this
occurs, a visual alert “BRAKE” will flash in the
instrument cluster display and a chime will
sound while ACC continues to apply its
maximum braking capacity.

Brake Alert

NOTE:
The “BRAKE!” Screen in the instrument cluster
display is a warning for the driver to take action
and does not necessarily mean that the
Forward Collision Warning system is applying
the brakes autonomously. Trailer Detect — If Equipped
When a trailer is detected, the ACC system auto
-
matically defaults to the longest setting (four
bars). The setting can be overridden by pushing
the Distance Button on the steering wheel.
Overtake Aid
When driving with ACC engaged and following a
vehicle, the system will provide an additional
acceleration up to the ACC set speed to assist in
passing the vehicle. This additional acceleration
is triggered when the driver utilizes the left turn
signal and will only be active when passing on
the left hand side.
ACC Operation At Stop
In the event that the ACC system brings your
vehicle to a standstill while following a target
vehicle, if the target vehicle starts moving within
two seconds of your vehicle coming to a stand -
still, your vehicle will resume motion without the
need for any driver action.
If the target vehicle does not start moving within
two seconds of your vehicle coming to a stand -
still, then ACC will cancel and the driver must
take over braking. When the target vehicle
drives off, ACC can be resumed by releasing the
brake and pushing the RES (+) button. NOTE:
After the ACC system holds your vehicle at a
standstill for approximately two seconds, a chime
will sound and an “ACC may cancel soon” warning
will display. The brakes will release when ACC is
canceled and the driver must take over braking.
While ACC is holding your vehicle at a standstill, if
the driver seatbelt is unbuckled or the driver door
is opened, the ACC system will cancel and the
brakes will release. Driver intervention will be
required at this mo ment.
Adaptive Cruise Control (ACC) Menu
The instrument cluster display will show the
current ACC system settings. The instrument
cluster display is located in the center of the
instrument cluster. The information it displays
depends on ACC system status.
WARNING!
When the ACC system is resumed, the driver
must ensure that there are no pedestrians,
vehicles or objects in the path of the vehicle.
Failure to follow these warnings can result in
a collision and death or serious personal
injury.

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STARTING AND OPERATING283
Push the Adaptive Cruise Control (ACC) on/off
button (located on the steering wheel) until one
of the following appears in the instrument
cluster display:
Adaptive Cruise Control Off
When ACC is deactivated, the display will read
“Adaptive Cruise Control Off.”
Adaptive Cruise Control Ready
When ACC is activated, but the vehicle speed
setting has not been selected, the display will
read “Adaptive Cruise Control Ready.”
Adaptive Cruise Control Set
When the RES (+) or the SET(-) button (located
on the steering wheel) is pushed, the display will
read “ACC SET.”
When ACC is set, the set speed will show in the
instrument cluster display.
The ACC screen may display once again if any
ACC activity occurs, which may include any of
the following:
System Cancel
Driver Override
System Off
ACC Proximity Warning
ACC Unavailable Warning
The instrument cluster display will return to
the last display selected after five seconds of
no ACC display activity
Display Warnings And Maintenance
“Wipe Front Radar Sensor In Front Of
Vehicle” Warning
The “ACC/FCW Unavailable Wipe Front Radar
Sensor” warning will display and also a chime
will indicate when conditions temporarily limit
system performance.
This most often occurs at times of poor visibility,
such as in snow or heavy rain. The ACC system
may also become temporarily blinded due to
obstructions, such as mud, dirt or ice. In these
cases, the instrument cluster display will display
“ACC/FCW Unavailable Wipe Front Radar
Sensor” and the system will deactivate.
The “ACC/FCW Unavailable Wipe Front Radar
Sensor” message can sometimes be displayed
while driving in highly reflective areas (i.e.
tunnels with reflective tiles, or ice and snow).
The ACC system will recover after the vehicle has left these areas. Under rare conditions,
when the radar is not tracking any vehicles or
objects in its path this warning may temporarily
occur.
NOTE:
If the “ACC/FCW Unavailable Wipe Front Radar
Sensor” warning is active Normal (Fixed Speed)
Cruise Control is still available. For additional
information refer to “Normal (Fixed Speed)
Cruise Control Mode” in this section.
If weather conditions are not a factor, the driver
should examine the sensor. It may require
cleaning or removal of an obstruction. The
sensor is located in the camera in the center of
the windshield, on the forward side of the rear
-
view mirror.
To keep the ACC System operating properly, it is
important to note the following maintenance
items:
Always keep the sensor clean. Carefully clear
the windshield.
Do not remove any screws from the sensor.
Doing so could cause an ACC system
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284STARTING AND OPERATING
malfunction or failure and require a sensor
realignment.
Do not attach or install any accessories near
the sensor, including transparent material or
aftermarket grilles. Doing so could cause an
ACC system failure or malfunction.
When the condition that deactivated the system
is no longer present, the system will return to
the “Adaptive Cruise Control Off” state and will
resume function by simply reactivating it.
NOTE:
If the “ACC/FCW Unavailable Wipe Front
Radar Sensor” message occurs frequently
(e.g. more than once on every trip) without
any snow, rain, mud, or other obstruction,
have the radar sensor realigned at your
authorized dealer.
Installing a snow plow, front-end protector,
an aftermarket grille or modifying the grille is
not recommended. Doing so may block the
sensor and inhibit ACC/FCW operation.
“Clean Front Windshield” Warning
The “ACC/FCW Limited Functionality Clean
Front Windshield” warning will display and also
a chime will indicate when conditions tempo -rarily limit system performance. This most often
occurs at times of poor visibility, such as in
snow or heavy rain and fog. The ACC system
may also become temporarily blinded due to
obstructions, such as mud, dirt, or ice on wind
-
shield, driving directly into the sun and fog on
the inside of glass. In these cases, the instru -
ment cluster display will show “ACC/FCW
Limited Functionality Clean Front Windshield”
and the system will have degraded perfor -
mance.
The “ACC/FCW Limited Functionality Clean
Front Windshield” message can sometimes be
displayed while driving in adverse weather
conditions. The ACC/FCW system will recover
after the vehicle has left these areas. Under
rare conditions, when the camera is not
tracking any vehicles or objects in its path this
warning may temporarily occur.
If weather conditions are not a factor, the driver
should examine the windshield and the camera
located on the back side of the inside rearview
mirror. They may require cleaning or removal of
an obstruction.
When the condition that created limited func -
tionality is no longer present, the system will
return to full functionality. NOTE:
If the “ACC/FCW Limited Functionality Clean
Front Windshield” message occurs frequently
(e.g. more than once on every trip) without any
snow, rain, mud, or other obstruction, have the
windshield and forward facing camera
inspected at your authorized dealer.
Service ACC/FCW Warning
If the system turns off, and the instrument
cluster displays “ACC/FCW Unavailable Service
Required” or “Cruise/FCW Unavailable Service
Required”, there may be an internal system
fault or a temporary malfunction that limits ACC
functionality. Although the vehicle is still driv
-
able under normal conditions, ACC will be
temporarily unavailable. If this occurs, try acti -
vating ACC again later, following an ignition
cycle. If the problem persists, see your autho -
rized dealer.
Precautions While Driving With ACC
In certain driving situations, ACC may have
detection issues. In these cases, ACC may
brake late or unexpectedly. The driver needs to
stay alert and may need to intervene.

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STARTING AND OPERATING285
NOTE:
Aftermarket add-ons such as snow plows, lift
kits, and brush/grille bars can hinder module
performance. Ensure the radar/camera has
no obstructions in the field of view.
Height modifications can limit module perfor -
mance and functionality.
Do not put stickers or easy passes over the
camera/radar field of view.
Any modifications to the vehicle that may
obstruct the field of view of the radar/camera
are not recommended.
Cleaning Instructions
Dust and dirt can accumulate on the cover and
block the camera lens. Clean the camera lens
with a soft microfiber cloth, being careful not to
damage or scratch the module.
Towing A Trailer
ACC while towing a trailer is recommended only
with an Integrated Trailer Brake Controller.
Aftermarket trailer brake controllers will not
activate the trailer brakes when ACC is braking.
Offset Driving
ACC may not detect a vehicle in the same lane
that is offset from your direct line of travel, or a
vehicle merging in from a side lane. There may
not be sufficient distance to the vehicle ahead.
The offset vehicle may move in and out of the
line of travel, which can cause your vehicle to
brake or accelerate unexpectedly.

Offset Driving Condition Example

Turns And Bends
When driving on a curve with ACC engaged, the
system may decrease the vehicle speed and
acceleration for stability reasons, with no target
vehicle detected. Once the vehicle is out of the
curve the system will resume your original set
speed. This is a part of normal ACC system func -
tionality.
NOTE:
On tight turns ACC performance may be limited.

Turn Or Bend Example

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286STARTING AND OPERATING
Using ACC On Hills
When driving on hills, ACC may not detect a
vehicle in your lane. Depending on the speed,
vehicle load, traffic conditions, and the steep -
ness of the hills, ACC performance may be
limited.

ACC Hill Example

Lane Changing
ACC may not detect a vehicle until it is
completely in the lane in which you are trav -
eling. In the illustration shown, ACC has not yet
detected the vehicle changing lanes and it may
not detect the vehicle until it's too late for the
ACC system to take action. ACC may not detect
a vehicle until it is completely in the lane. There
may not be sufficient distance to the
lane-changing vehicle. Always be attentive and
ready to apply the brakes if necessary.

Lane Changing Example

Narrow Vehicles
Some narrow vehicles traveling near the outer
edges of the lane or edging into the lane are not
detected until they have moved fully into the
lane. There may not be sufficient distance to the
vehicle ahead.
Narrow Vehicle Example

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STARTING AND OPERATING287
Stationary Objects And Vehicles
ACC does not react to stationary objects and
stationary vehicles. For example, ACC will not
react in situations where the vehicle you are
following exits your lane and the vehicle ahead
is stopped in your lane. Always be attentive and
ready to apply the brakes if necessary.

Stationary Object And Stationary Vehicle Example

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.
Normal (Fixed Speed) Cruise Control Mode
In addition to Adaptive Cruise Control mode, a
Normal (Fixed Speed) Cruise Control mode is
available for cruising at fixed speeds. The
Normal (Fixed Speed) Cruise Control mode is
designed to maintain a set cruising speed
without requiring the driver to operate the accel -
erator. Speed Control can only be operated if
the vehicle speed is above 20 mph (32 km/h).
To change between the different control modes,
push the Adaptive Cruise Control (ACC) on/off
button which turns the ACC on and the Normal
(Fixed Speed) Cruise Control off. Pushing of the
Normal (Fixed Speed) Cruise Control on/off
button will result in turning on (changing to) the
Normal (Fixed Speed) Cruise Control mode.
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288STARTING AND OPERATING
To Set A Desired Speed
Turn the Normal (Fixed Speed) Cruise
Control on. When the vehicle has
reached the desired speed, push the
RES (+) or SET (-) button and release.
Release the accelerator and the vehicle will
operate at the selected speed. Once a speed
has been set a message “CRUISE CONTROL SET
TO MPH (km/h)” will appear indicating what
speed was set. This light will turn on when the
system is turned on via the on/off control. It
turns green when the cruise control is set.
To Vary The Speed Setting
To Increase Speed
When the Normal (Fixed Speed) Cruise Control
is set, you can increase speed by pushing the
RES (+) button.
The driver's preferred units can be selected
through the instrument panel settings. Refer to
“Instrument Cluster Display” in “Getting To
Know Your Instrument Panel” for more informa-
tion. The speed increment shown is dependent
on the speed of U.S. (mph) or Metric (km/h)
units:
U.S. Speed (mph)
Pushing the RES (+) button once will result in
a 1 mph increase in set speed. Each subse -
quent tap of the button results in an increase
of 1 mph.
If the button is continually pushed, the set
speed will continue to increase in 5 mph
increments until the button is released. The
increase in set speed is reflected in the
instrument cluster display. Metric Speed (km/h)

Pushing the RES (+) button once will result in
a 1 km/h increase in set speed. Each subse -
quent tap of the button results in an increase
of 1 km/h.
If the button is continually pushed, the set
speed will continue to increase in 10 km/h
increments until the button is released. The
increase in set speed is reflected in the
instrument cluster display.
To Decrease Speed
When the Normal (Fixed Speed) Cruise Control
is set, you can decrease speed by pushing the
SET (-) button.
The driver's preferred units can be selected
through the instrument panel settings. Refer to
“Instrument Cluster Display” in “Getting To
Know Your Instrument Panel” for more informa-
tion. The speed decrement shown is dependent
on the speed of U.S. (mph) or Metric (km/h)
units:
U.S. Speed (mph)
Pushing the SET (-) button once will result in
a 1 mph decrease in set speed. Each subse -
WARNING!
In the Normal (Fixed Speed) Cruise Control
mode, the system will not react to vehicles
ahead. In addition, the proximity warning
does not activate and no alarm will sound
even if you are too close to the vehicle ahead
since neither the presence of the vehicle
ahead nor the vehicle-to-vehicle distance is
detected. Be sure to maintain a safe distance
between your vehicle and the vehicle ahead.
Always be aware which mode is selected.

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