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

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Lane Keeping Assist System (LKAS)

Driving

Lane Keeping Assist System (LKAS)

Provides steering input to help keep the vehicle in the middle of a detected lane and 
provides visual alert 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. 91

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. 485

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

2

Front Sensor Camera

 P. 493

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

■

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.

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.

Continued

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Lane Keeping Assist System (LKAS)

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)

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)

480

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.

■

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.

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Lane Keeping Assist System (LKAS)

Continued

Driving

■

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.

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.

MAIN

 Button

LKAS Button

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Lane Keeping Assist System (LKAS)

482

Driving

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 on and off.

MAIN

 Button

LKAS Button

Continued

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Lane Keeping Assist System (LKAS)

Driving

■

The system operation is suspended if 
you:

•

Set the wipers to continuous operation.

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Turning the wipers off resumes the 
LKAS.

•

Set the wiper switch to 

AUTO

 and the 

wipers operate continuously.

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The LKAS resumes when the wipers stop 
or operate intermittently.

•

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.

1

The system operation is suspended if you:

You can change the setting for the LKAS.
LKAS suspended beep 

On

 and 

Off

 can be selected.

2

Customized Features

 P. 99, 315

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 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.

■

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.

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Lane Keeping Assist System (LKAS)

Continued

Driving

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)

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

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. 99, 315

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. 493

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

2

RDM Conditions and Limitations

 P. 491

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

Continued

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Road Departure Mitigation (RDM) System

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. 80

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

490

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.

■

RDM On and Off

1

RDM On and Off

When you have selected 

Warning Only

 from the 

customized options using the multi-information 
display or information screen

*

, the system does not 

operate the steering wheel and braking.

2

Customized Features

 P. 99, 315

RDM Button

Indicator

* Not available on all models

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Road Departure Mitigation (RDM) System

Continued

Driving

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 Conditions and Limitations

492

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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, and CMBS

TM

, is designed to 

detect an object that triggers any of the systems to operate their 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