Acura RDX (2021 year). Manual in english — page 30

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Adaptive Cruise Control (ACC) with Low Speed Follow

Driving

The higher your vehicle’s following-speed is, the longer the short, middle, long or
extra long following-interval becomes. See the following examples for your
reference.

When your vehicle stops automatically because a vehicle detected ahead of you has
stopped, the interval between the two vehicles will vary based on the ACC with Low
Speed Follow interval setting.

Following-interval

When the Set Speed is:

50 mph (80 km/h)

65 mph (104 km/h)

Short

83 feet

25 meters

1.1 sec

100 feet

31 meters

1.1 sec

Middle

110 feet

33 meters

1.5 sec

137 feet

42 meters

1.5 sec

Long

154 feet

47 meters

2.1 sec

200 feet

61 meters

2.1 sec

Extra
Long

207 feet

63 meters

2.9 sec

272 feet

83 meters

2.9 sec

Continued

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Adaptive Cruise Control (ACC) with Low Speed Follow

Driving

To cancel ACC with Low Speed Follow, do any
of the following:

•

Press the

CANCEL

button.

•

Press the

MAIN

button.

u

The

ACC

with Low Speed Follow

indicator (green) goes off.

•

Depress the brake pedal while the vehicle is
moving forward.

■

To Cancel

1

To Cancel

Resuming the prior set speed: After you have
canceled ACC with Low Speed Follow, you can
resume the prior set speed while it is still displayed.
Press the

RES/+

/

SET/–

switch up.

The set speed cannot be set or resumed when ACC
with Low Speed Follow has been turned off using the

MAIN

button. Press the

MAIN

button to activate the

system, then set the desired speed.

CANCEL

Button

MAIN

Button

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Adaptive Cruise Control (ACC) with Low Speed Follow

480

Driving

■

Automatic cancellation

The beeper sounds and a message appears on the multi-information display when
ACC with Low Speed Follow is automatically canceled. Any of these conditions may
cause the ACC with Low Speed Follow to automatically cancel:

•

Bad weather (rain, fog, snow, etc.)

•

When the radar sensor behind the emblem gets dirty.

•

The vehicle ahead of you cannot be detected.

•

An abnormal tire condition is detected, or the tires are skidding.

•

Driving on a mountainous road, or driving off road for extended periods.

•

Abrupt steering wheel movement.

•

When the ABS, VSA

®

or CMBS

TM

is activated.

•

When the ABS or VSA

®

system indicator comes on.

•

When the vehicle is stopped on a very steep slope.

•

When you manually apply the parking brake.

•

When the detected vehicle within the ACC with Low Speed Follow range is too
close to your vehicle.

•

The camera behind the rearview mirror, or the area around the camera, including
the windshield, gets dirty.

•

When the Maximum Load Limit is exceeded.

•

When passing through an enclosed space, such as tunnel.

The ACC with Low Speed Follow automatic cancellation can be also triggered by the
following causes. In these cases, the parking brake will be automatically applied.

•

The driver’s seat belt is unfastened when the vehicle is stationary.

•

The vehicle stops for more than 10 minutes.

•

The engine is turned off.

1

Automatic cancellation

Even though ACC with Low Speed Follow has been
automatically canceled, you can still resume the prior
set speed. Wait until the condition that caused ACC
with Low Speed Follow to cancel improves, then
press the

RES/+

/

SET/–

switch up or down.

Continued

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Adaptive Cruise Control (ACC) with Low Speed Follow

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 Low Speed
Follow, 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 Low Speed Follow to Cruise Control

1

To Switch ACC with Low Speed Follow 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 or
audio/information screen between mph and km/h.

2

Speed/Distance Units

P. 138

2

Customized Features

P. 341

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 is canceled automatically.

ACC with
Low Speed
Follow ON

Cruise
Control ON

■

To Set the Vehicle Speed

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Adaptive Cruise Control (ACC) with Low Speed Follow

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. 101

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. 488

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

2

Front Sensor Camera

P. 495

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)

484

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

Continued

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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 is traveling between about 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)

486

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 Low

Speed Follow 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

.

u

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.

u

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.

u

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.

•

The vehicle is towing a trailer.

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. 341

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.

u

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. 495

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

2

RDM Conditions and Limitations

P. 493

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

492

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. 78

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.

Continued

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Road Departure Mitigation (RDM) System

Driving

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

u

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.

2

Customized Features

P. 341

■

RDM Conditions and Limitations