Acura TLX (2021 year). Manual in english - page 28

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Adaptive Cruise Control (ACC) with Low Speed Follow

Continued

Driving

Each time you press the 

RES/+

/

SET/–

 switch up or down, the vehicle speed is 

increased or decreased by about 1 mph (1 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 Adjust the Vehicle Speed

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Adaptive Cruise Control (ACC) with Low Speed Follow

446

Driving

To cancel cruise control, do any of the following:

•

Press the 

CANCEL

 button.

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The  

indicator 

(green) on the multi-information display changes to the 

 

indicator (white).

•

Press the 

 button.

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 indicator (green) goes off.

•

Depress the brake pedal.

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The  

indicator 

(green) on the multi-information display changes to the 

 

indicator (white).

■

To Cancel

1

To Cancel

Resuming the prior set speed:
After you have canceled cruise mode, you can 
activate the cruise mode with the prior set speed 
displayed on the multi-information display (in gray) 
by pressing the 

RES/+

/

SET/−

 switch up while driving 

at a speed of at least 25 mph (40 km/h) or more.
When you turn the cruise mode off by pressing the 

CANCEL

 button or depressing the brake pedal, the 

prior set speed is displayed on the multi-information 
display in gray.
When pressing the 

RES/+

/

SET/−

 switch up, the 

cruise mode is activated with displayed speed.
Then, when the 

 indicator is displayed and you 

press the 

RES/+

/

SET/−

 switch up during the prior set 

speed (in gray) is not displayed, the current vehicle 
speed is set as same as the condition of operating the 

RES/+

/

SET/−

 switch down.

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Adaptive Cruise Control (ACC) with Low Speed Follow

Driving

1

To Cancel

You cannot set or resume in the following situations:

•

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

•

When the 

 button is turned off

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

Prior Set Speed (Gray)

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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 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.

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. 454

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

2

Front Sensor Camera

 P. 480

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

■

Steering input assist

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

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.

■

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)

450

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 high speed operation.

■

How to activate the system

1.

Press the LKAS button.

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LKAS indicator (white) and lane outlines 
appear on the multi-information display.
The system is ready to use.

■

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.

LKAS Button

 (white)

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Lane Keeping Assist System (LKAS)

Continued

Driving

2.

Keep your vehicle near the center of the 
lane while driving.

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The LKAS indicator changes from white 
to green and the dotted outer lines 
change to solid ones once the system 
starts operating after detecting the left 
and right lane markings.

Press the 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.

 (green) is on.

■

To Cancel

LKAS Button

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Lane Keeping Assist System (LKAS)

452

Driving

■

The system operation is suspended if 
you:

•

Turning the wipers to continuous high 
speed operation.

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Both 

LO

 and 

INT

 mode or 

OFF

 will 

resume LKAS.

•

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. 300

When the LKAS is suspended, 

the lane lines on the multi-

information display change to 

contour lines, and the beeper 

sounds (if activated).

 (white) is on.

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Lane Keeping Assist System (LKAS)

Continued

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)

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)

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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Traffic Jam Assist

Continued

Driving

Traffic Jam Assist

The traffic jam assist system uses a radar sensor mounted inside the front grille and 
a camera mounted to the upper portion of the windshield to detect and monitor left 
and right white (yellow) traffic lane lines as well as any vehicle ahead. Based on 
inputs from the radar sensor and camera, the system adjusts the speed of your 
vehicle to maintain a set interval between your vehicle and the one detected ahead. 
It also applies steering torque to keep your vehicle in the center of the detected lane 
when you are driving in heavy traffic.

■

How Traffic Jam Assist works

If you are in heavy traffic and Adaptive Cruise Control with Low Speed Follow is 
active, the traffic jam assist system, upon detecting the traffic lane lines and a vehicle 
ahead, will apply steering torque to help keep your vehicle in the center of the lane.
The system adjusts the speed of your vehicle to maintain a set interval between your 
vehicle and the one detected ahead.

1

Traffic Jam Assist

3

WARNING

Improper reliance on Traffic Jam Assist can 
cause a crash resulting in injury or death.
Always maintain full control over your 

vehicle even when this system is active. and 

only use when on expressways or freeways.

Traffic Jam Assist is not an autonomous 
driving system.

3

WARNING

Failure to securely park vehicle when 
stopped while Adaptive Cruise Control with 
Low Speed Follow is active can allow the 
vehicle to roll away, resulting in a crash 
causing injury or death.
Never stop the vehicle and exit it without 
placing it in Park and setting the parking 
brake.

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Traffic Jam Assist

458

Driving

When the driver takes direct control of steering, the steering assist function is 
temporarily canceled.
The torque applied to steering may not be noticeable when the driver has direct 
control of steering, or when the surface of the road is rough or uneven.

Front Sensor Camera

Detects vehicle 

ahead

Detects left and right 

white (yellow) traffic 

lane lines

Radar Sensor

When you use the turn signal to indicate a lane change, Traffic Jam Assist is 

temporarily deactivated. It is reactivated once the vehicle is traveling in the 

center of the lane and the system has detected the traffic lane lines and a 

vehicle ahead.

1

Traffic Jam Assist

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

2

Front Sensor Camera

 P. 480

Traffic Jam Assist may not always be able to detect 
lane division lines or a vehicle traveling ahead. 
Depending on weather and road conditions and 
other factors, Traffic Jam Assist may not function 
normally. Always be aware of your surroundings and 
the road conditions, and conduct yourself in a 
manner conducive to safe driving. Traffic Jam Assist 
may not function properly when you are driving 
through a sharp curve or repeatedly accelerating and 
decelerating.

Traffic Jam Assist may not work properly under the 
certain conditions:

2

Traffic Jam Assist: Conditions and 
limitations

 P. 464

Continued

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Traffic Jam Assist

Driving

Traffic Jam Assist is activated when all of the following circumstances exist:

•

LKAS is active.

•

ACC with Low Speed Follow is active.

•

The vehicle speed is between 0 and 45mph (0 and 72km/h) and there is a vehicle 
detected traveling ahead.

•

The lane in which you are driving has detectable lane markers on both sides, and 
your vehicle is in the center of the lane.

•

You are driving on a straight or slightly curved road.

•

The driver is gripping the steering wheel.

Do not use Traffic Jam Assist in any of the following situations:

•

You are traveling on a road with sharp curves.

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The system may not allow your vehicle to respond in a manner best suited for 
the road conditions.

•

You are entering a toll booth, interchange, service area, or parking area.

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If the vehicle ahead disappears from the travel path of your vehicle, your 
vehicle may suddenly accelerate to resume the set speed.

•

You are driving in adverse weather (rain, fog, snow, etc.).

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The system may not be able to correctly determine the interval between your 
vehicle and the one ahead.

•

The surface of the road is slippery, for example, it is icy or covered with snow.

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The tires may slip, causing you to lose control of the vehicle.

•

You are driving in a HOV lane and motorcycles are passing you to the side, or you 
are required to keep your vehicle to the right or the left of the lane.

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The system may not be able to correctly determine the vehicle ahead.

■

Traffic Jam Assist Activation

1

Traffic Jam Assist Activation

Refer to the following page for proper handling of 
the Adaptive Cruise Control with Low Speed Follow:

2

Adaptive Cruise Control (ACC) with Low 
Speed Follow

 P. 428

Refer to the following page for proper handling of 
the Lane Keeping Assist System (LKAS):

2

Lane Keeping Assist System (LKAS)

 P. 448

Refer to the following page for steering buttons and 
displays:

2

Operation Switches for the ACC with Low 
Speed Follow/LKAS/Traffic Jam Assist

 

P. 414

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Traffic Jam Assist

460

Driving

■

When a vehicle is traveling ahead

When a vehicle ahead of yours is detected entering the Traffic Jam Assist detection 
area, Traffic Jam Assist adjusts the speed of your vehicle to maintain the selected 
interval between your vehicle and the one ahead. It also applies steering torque to 
keep your vehicle in the center of the detected lane.

■

How Traffic Jam Assist Works

1

How Traffic Jam Assist Works

If your vehicle veers too far to the right or the left of 
the white (yellow) traffic lane lines while Traffic Jam 
Assist is active, deactivate Traffic Jam Assist and have 
an authorized Acura dealer inspect your vehicle.

In some cases the system cannot properly detect the 
traffic lane lines and, as a result, will not provide 
steering assistance.

2

Traffic Jam Assist: Conditions and 
limitations

 P. 464

If the driver takes his or her hands off the steering 
wheel or does not adequately maintain control of 
steering, the warning below will appear.

If the driver does not grip the steering wheel after the 
warning above has repeatedly appeared, a warning 
buzzer will sound and Traffic Jam Assist will be 
canceled.

You can have the head-up display

*

 show you the 

current state of Traffic Jam Assist.

2

Head-Up Display

*

 P. 111

* Not available on all models