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

478

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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.

u

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.

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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

488

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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