Acura RDX (2019 year). Instruction — page 30

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Adaptive Cruise Control (ACC) with Low Speed Follow (LSF)

Driving

Press and hold the (interval) button for one
second. Cruise Mode Selected appears on
the multi-information display for two seconds,
and then the mode switches to Cruise.
To switch back to ACC with LSF, press and
hold the button again for one second.

When to use

Desired speed in a range above roughly 25 mph (40 km/h) ~.

Take your foot off the pedal and press the RES/+/SET/– switch down when you
reach the desired speed.
The moment you release the RES/+/SET/– switch, the set speed is fixed, and cruise
control begins. The CRUISE CONTROL indicator comes on.

When you use cruise control, Straight Driving Assist (a feature of the Electric Power
Steering system) is activated.
By enabling the steering system to automatically compensate for natural steering
pull, Straight Driving Assist makes it easier for you to keep your vehicle in a straight
line.

To Switch ACC with LSF to Cruise Control

1

To Switch ACC with LSF to Cruise Control

Always be aware which mode you are in. When you
are driving in Cruise mode, the system will not assist
you to maintain a following interval from a vehicle
ahead of you.

You can switch the displayed set speed
measurements on the multi-information display
between mph and km/h.

2 Speed/Distance Units P. 134

Resuming the prior set speed:
After cruise control has been canceled, you can still
resume the prior set speed by pressing the RES/+/
SET/– switch up while driving at a speed of at least
25 mph (40 km/h) or more.

You cannot set or resume in the following situations:

When vehicle speed is less than 25 mph (40 km/h)

When the MAIN button is turned off.

At vehicle speeds of 22 mph (35 km/h) or less, cruise
control canceled automatically.

ACC with
LSF ON

Cruise
Control ON

To Set the Vehicle Speed

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Adaptive Cruise Control (ACC) with Low Speed Follow (LSF)

Driving

Each time you press the RES/+/SET/– switch up or down, the vehicle speed is
increased or decreased by about 1 mph (1.6 km/h).
If you keep the RES/+/SET/– switch pressed up or down, the vehicle speed increases
or decreases until you release it. This speed is then set.

To cancel cruise control, do any of the following:
• Press the CANCEL button.
• Press the MAIN button.
• Depress the brake pedal.
The CRUISE CONTROL indicator goes off.

To Adjust the Vehicle Speed

To Cancel

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Lane Keeping Assist System (LKAS)

Continued

Driving

Lane Keeping Assist System (LKAS)

Provides steering input to help keep the vehicle in the middle of a detected lane and
provides tactile and visual alerts if the vehicle is detected drifting out of its lane.

1

Lane Keeping Assist System (LKAS)

Important Safety Reminders
The LKAS is for your convenience only. It is not a
substitute for your vehicle control. The system does
not work if you take your hands off the steering
wheel or fail to steer the vehicle.

2 Multi-Information Display Warning and

Information Messages P. 97

Do not place objects on the instrument panel.
Objects may reflect on the windshield and prevent
correct detection of the traffic lanes.

The LKAS only alerts you when lane drift is detected
without a turn signal in use. The LKAS may not detect
all lane markings or lane departures; accuracy will
vary based on weather, speed, and lane marker
condition.
It is always your responsibility to safely operate the
vehicle and avoid collisions.

The LKAS is convenient when it is used on freeways.

The LKAS may not work properly or may work
improperly under the certain conditions:

2 LKAS Conditions and Limitations P. 476

You can read about handling information for the
camera equipped with this system.

2 Front Sensor Camera P. 483

When you operate the turn signals to change lanes, the system is suspended, and
resumes after the signals are off.
If you make a lane change without operating the turn signals, the LKAS alerts
activate, and torque is applied to the steering.

Front Sensor Camera

Monitors the lane
lines.

Tactile and visual alerts

Rapid vibrations on the steering
wheel and a warning display alert
you that the vehicle is drifting out of
a detected lane.

Steering input assist

The system applies torque to the steering to keep the vehicle between the left and
right lane lines. The applied torque becomes stronger as the vehicle gets closer to
either of the lane lines.

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Lane Keeping Assist System (LKAS)

472

Driving

Provides assistance to keep the vehicle in the center of the lane. When the vehicle
nears a white or yellow line, steering force of the electric power steering will become
stronger.

When the vehicle enters the warning area, the LKAS alerts you with slight steering
wheel vibration as well as a warning display.

Lane Keep Support Function

1

Lane Keeping Assist System (LKAS)

The LKAS may not function as designed while driving
in frequent stop and go traffic, or on roads with
sharp curves.

When it fails to detect lanes, the system will
temporarily be canceled. When a lane is detected, the
system will recover automatically.

Lane Departure Warning Function

Warning Area

Warning Area

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Lane Keeping Assist System (LKAS)

Driving

The system can be used when the following conditions are met.
• The lane in which you are driving has detectable lane markers on both sides, and

your vehicle is in the center of the lane.

• The vehicle speed is between 45 and 90 mph (72 and 145 km/h).
• You are driving on a straight or slightly curved road.
• The turn signals are off.
• The brake pedal is not depressed.
• The wipers are not in continuous operation.

How to activate the system

1. Press the MAIN button.

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The LKAS is on in the multi-information
display.
The system is ready to use.

2. Press the LKAS button.

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Lane outlines appear on the multi-
information display.
The system is activated.

When the System can be Used

1

When the System can be Used

If the vehicle drifts toward either left or right lane line
due to the system applying torque, turn off the LKAS
and have your vehicle checked by a dealer.

MAIN Button

LKAS Button

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Lane Keeping Assist System (LKAS)

474

Driving

3. Keep your vehicle near the center of the

lane while driving.

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The dotted outer lines change to solid
ones once the system starts operating
after detecting the left and right lane
markings.

To cancel the LKAS:
Press the MAIN or LKAS button.

The LKAS is turned off every time you stop the
engine, even if you turned it on the last time
you drove the vehicle.

To Cancel

1

To Cancel

Pressing the MAIN button also turns ACC with LSF
on and off.

MAIN Button

LKAS Button

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Lane Keeping Assist System (LKAS)

Continued

Driving

The system operation is suspended if
you:

• Set the wipers to HI.

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Turning the wipers off or setting it to LO
resumes the LKAS.

• Set the wiper switch to AUTO and the

wipers operate at high speed.

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The LKAS resumes when the wipers stop
or operate at low speed.

• Decrease the vehicle speed to about 40 mph

(64 km/h) or less.

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Increasing the vehicle speed to about
45 mph (72 km/h) or more resumes the
LKAS.

• Depress the brake pedal.

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The LKAS resumes and starts detecting
the lane lines again once you release the
brake pedal.

The LKAS may automatically be suspended when:

• The system fails to detect lane lines.
• The steering wheel is quickly turned.
• You fail to steer the vehicle.
• Driving through a sharp curve.
• Driving at a speed in excess of approximately 90 mph (145 km/h).
Once these conditions no longer exist, the LKAS automatically resumes.

When the LKAS is suspended,
the lane lines on the multi-
information display change to
contour lines, and the beeper
sounds (if activated).

Models with automatic intermittent wipers

All models

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Lane Keeping Assist System (LKAS)

Driving

The LKAS may automatically be canceled when:

• The camera temperature gets extremely high or low.
• The camera behind the rearview mirror, or the area around the camera, including

the windshield, gets dirty.

• The ABS or VSA® system engages.
The beeper sounds if the LKAS is automatically canceled.

The system may not detect lane markings and therefore may not keep the vehicle in
the middle of a lane under certain conditions, including the following:

Environmental conditions

• Driving in bad weather (rain, fog, snow, etc.).
• Sudden changes between light and dark, such as an entrance or exit of a tunnel.
• There is little contrast between lane lines and the roadway surface.
• Driving into low sunlight (e.g., at dawn or dusk).
• Strong light is reflected onto the roadway.
• Driving in the shadows of trees, buildings, etc.
• Shadows of adjacent objects are parallel to lane markings.
• Roadway objects or structures are misinterpreted as lane markers.
• Reflections on the interior of the windshield.
• Driving at night or in a dark condition such as a tunnel.

LKAS Conditions and Limitations

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Lane Keeping Assist System (LKAS)

Continued

Driving

Roadway conditions

• Driving on a snowy or wet roadway (obscured lane marking, vehicle tracks,

reflected lights, road spray, high contrast).

• Driving on a road with temporary lane markings.
• Faint, multiple, or varied lane markings are visible on the roadway due to road

repairs or old lane markings.

• The roadway has merging, split, or crossing lines (e.g., such as at an intersection

or crosswalk).

• The lane markings are extremely narrow, wide, or changing.

• The vehicle in front of you is driving near the lane lines.
• The road is hilly or the vehicle is approaching the crest of a hill.
• Driving on rough or unpaved roads, or over bumpy surfaces.

Faded lines

Duplicate lines

Tire tracks

Very wide or narrow traffic lane

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Lane Keeping Assist System (LKAS)

Driving

• When objects on the road (curb, guard rail, pylons, etc.) are recognized as white

lines (or yellow lines).

• Driving on roads with double lines.

Vehicle conditions

• Headlight lenses are dirty or the headlights are not properly adjusted.
• The outside of the windshield is streaked or blocked by dirt, mud, leaves, wet

snow, etc.

• The inside of the windshield is fogged.
• The camera temperature gets too high.
• An abnormal tire or wheel condition (wrong sized, varied size or construction,

improperly inflated, compact spare tire

*

, etc.).

• The vehicle is tilted due to a heavy load or suspension modifications.

Lane void of lines at junction

* Not available on all models

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Road Departure Mitigation (RDM) System

Continued

Driving

Road Departure Mitigation (RDM) System

Alerts and helps to assist you when the system detects a possibility of your vehicle
unintentionally crossing over detected lane markings and/or leaving the roadway
altogether.

The front camera behind the rearview mirror
monitors left and right lane markings (in white
or yellow). If your vehicle is getting too close
to detected lane markings without a turn
signal activated, the system, in addition to a
visual alert, applies steering torque and alerts
you with rapid vibrations on the steering
wheel, to help you remain within the detected
lane.

2 Customized Features P. 332

As a visual alert, the Lane Departure
message appears on the multi-information
display.

If the system determines that its steering input is insufficient to keep your vehicle on
the roadway, it may apply braking.

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Braking is applied only when the lane markings are solid continuous lines.

The system cancels assisting operations when you turn the steering wheel to avoid
crossing over detected lane markings.

If the system operates several times without detecting driver response, the system
beeps to alert you.

How the System Works

1

Road Departure Mitigation (RDM) System

Important Safety Reminder
Like all assistance systems, the RDM system has
limitations.
Over-reliance on the RDM system may result in a
collision. It is always your responsibility to keep the
vehicle within your driving lane.

The RDM system only alerts you when lane drift is
detected without a turn signal in use. The RDM
system may not detect all lane markings or lane or
roadway departures; accuracy will vary based on
weather, speed and lane marker condition. It is
always your responsibility to safely operate the
vehicle and avoid collisions.

You can read about handling information for the
camera equipped with this system.

2 Front Sensor Camera P. 483

The RDM system may not work properly or may work
improperly under the certain conditions:

2 RDM Conditions and Limitations P. 481

There are times when you may not notice RDM
functions due to your operation of the vehicle, or
road surface conditions.

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Road Departure Mitigation (RDM) System

480

Driving

The system becomes ready to start searching for lane markings when all the
following conditions are met:
• The vehicle is traveling between about 45 and 90 mph (72 and 145 km/h).
• The vehicle is on a straight or slightly curved road.
• The turn signals are off.
• The brake pedal is not depressed.
• The wipers are not in continuous operation.
• The vehicle is not accelerating or braking, and the steering wheel is not being

turned.

• The system makes a determination that the driver is not actively accelerating,

braking or steering.

How the System Activates

1

How the System Activates

The RDM system may automatically shut off and the
indicator comes and stays on.

2 Indicators P. 74

RDM system function can be impacted when the
vehicle is:

Not driven within a traffic lane.

Driven on the inside edge of a curve, or outside of
a lane.

Driven in a narrow lane.

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Road Departure Mitigation (RDM) System

Driving

Press the RDM button to turn the system on
and off.

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The indicator in the button comes on and
the message appears on the multi-
information display when the system is
on.

The system may not properly detect lane markings and the position of your vehicle
under certain conditions. Some examples of these conditions are listed below.

Environmental conditions

• Driving in bad weather (rain, fog, snow, etc.).
• Sudden changes between light and dark, such as an entrance or exit of a tunnel.
• There is little contrast between lane lines and the roadway surface.
• Driving into low sunlight (e.g., at dawn or dusk).
• Strong light is reflected onto the roadway.
• Driving in the shadows of trees, buildings, etc.
• Shadows of adjacent objects are parallel to lane markings.
• Roadway objects or structures are misinterpreted as lane markers.
• Reflections on the interior of the windshield.
• Driving at night or in a dark condition such as a tunnel.

RDM On and Off

1

RDM On and Off

When you have selected Warning Only from the
customized options using the audio/information
screen, the system does not operate the steering
wheel and braking.

RDM Conditions and Limitations

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Road Departure Mitigation (RDM) System

Driving

Roadway conditions

• Driving on a snowy or wet roadway (obscured lane marking, vehicle tracks,

reflected lights, road spray, high contrast).

• Driving on a road with temporary lane markings.
• Faint, multiple, or varied lane markings are visible on the roadway due to road

repairs or old lane markings.

• The roadway has merging, split, or crossing lines (e.g., such as at an intersection

or crosswalk).

• The lane markings are extremely narrow, wide, or changing.
• The vehicle in front of you is driving near the lane lines.
• The road is hilly or the vehicle is approaching the crest of a hill.
• Driving on rough or unpaved roads, or over bumpy surfaces.
• When objects on the road (curb, guard rail, pylons, etc.) are recognized as white

lines (or yellow lines).

• Driving on roads with double lines.

Vehicle conditions

• Headlight lenses are dirty or the headlights are not properly adjusted.
• The outside of the windshield is streaked or blocked by dirt, mud, leaves, wet

snow, etc.

• The inside of the windshield is fogged.
• The camera temperature gets too high.
• An abnormal tire or wheel condition (wrong sized, varied size or construction,

improperly inflated, compact spare tire

*

, etc.).

• The vehicle is tilted due to a heavy load or suspension modifications.
• When tire chains are installed.

* Not available on all models

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Front Sensor Camera

Continued

Driving

Front Sensor Camera

The camera, used in systems such as LKAS, RDM, ACC with LSF, and CMBS

TM

, is

designed to detect an object that triggers any of the systems to operate its
functions.

This camera is located behind the rearview
mirror.

To help reduce the likelihood that high interior
temperatures will cause the camera’s sensing
system to shut off, when parking, find a shady
area or face the front of the vehicle away from
the sun. If you use a reflective sun shade, do
not allow it to cover the camera housing.
Covering the camera can concentrate heat on
it.

Camera Location and Handling Tips

1

Front Sensor Camera

Never apply a film or attach any objects to the
windshield, the hood, or the front grille that could
obstruct the camera’s field of vision and cause the
system to operate abnormally.
Scratches, nicks, and other damage to the windshield
within the camera’s field of vision can cause the
system to operate abnormally. If this occurs, we
recommend that you replace the windshield with a
genuine Acura replacement windshield. Making even
minor repairs within the camera’s field of vision or
installing an aftermarket replacement windshield
may also cause the system to operate abnormally.
After replacing the windshield, have a dealer
recalibrate the camera. Proper calibration of the
camera is necessary for the system to operate
properly.

Do not place an object on the top of the instrument
panel. It may reflect onto the windshield and prevent
the system from detecting lane lines properly.

Front Sensor
Camera

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Front Sensor Camera

484

Driving

1

Front Sensor Camera

If the Some Driver Assist Systems Cannot
Operate: Camera Temperature Too High
message
appears:

Use the climate control system to cool down the
interior and, if necessary, also use defroster mode
with the airflow directed towards the camera.

Start driving the vehicle to lower the windshield
temperature, which cools down the area around
the camera.

If the Some Driver Assist Systems Cannot
Operate: Clean Front Windshield
message
appears:

Park your vehicle in a safe place, and clean the
windshield. If the message does not disappear after
you have cleaned the windshield and driven for a
while, have your vehicle checked by a dealer.

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