Acura TLX (2019 year). Manual - part 26

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When Driving

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Road Departure Mitigation (RDM) System

406

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.

■

RDM On and Off

1

RDM On and Off

When you have selected Warning Only from the 
customized options using the multi-information 
display, the system does not operate the steering 
wheel and braking.

RDM Button

Indicator

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When Driving

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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

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When Driving

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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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When Driving

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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. 105

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. 415

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

2 Front Sensor Camera P. 388

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.

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When Driving

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Lane Keeping Assist System (LKAS)

410

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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Continued

411

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When Driving

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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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When Driving

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Lane Keeping Assist System (LKAS)

412

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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When Driving

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Lane Keeping Assist System (LKAS)

Continued

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.

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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When Driving

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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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When Driving

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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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When Driving

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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.
• 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.

* Not available on all models

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When Driving

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Vehicle Stability Assist® (VSA®), aka Electronic Stability Control (ESC), System

Continued

Driving

Vehicle Stability Assist® (VSA®), aka Electronic 
Stability Control (ESC), System

VSA® helps to stabilize the vehicle during cornering if the vehicle turns more or less 
than what was intended. It also assists in maintaining traction on slippery surfaces. 
It does so by regulating engine output and selectively applying the brakes.

When VSA® activates, you may notice that the 
engine does not respond to the accelerator. 
You may also notice some noise from the 
hydraulic system. You will also see the 
indicator blink.

■

VSA® Operation

1

Vehicle Stability Assist® (VSA®), aka Electronic Stability Control 
(ESC), System

The VSA® may not function properly if tire type and 
size are mixed. Make sure to use the same size and 
type of tire, and the air pressures as specified.

When the VSA® system indicator comes on and stays 
on while driving, there may be a problem with the 
system. While this may not interfere with normal 
driving, have your vehicle checked by a dealer 
immediately.

VSA® cannot enhance stability in all driving situations 
and does not control the entire braking system. You 
still need to drive and corner at speeds appropriate 
for the conditions and always leave a sufficient 
margin of safety.

The main function of the VSA® system is generally 
known as Electronic Stability Control (ESC). The 
system also includes a traction control function.

VSA® System 
Indicator

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When Driving

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Vehicle Stability Assist® (VSA®), aka Electronic Stability Control (ESC), System

418

Driving

This button is on the driver side control panel. 
To partially disable VSA® functionality/
features, press and hold it until you hear a 
beep.

Your vehicle will have normal braking and 
cornering ability, but traction control function 
will be less effective.

To restore VSA® functionality/features, press 
the  

(VSA® OFF) button until you hear a 

beep.

VSA® is turned on every time you start the 
engine, even if you turned it off the last time 
you drove the vehicle.

■

VSA® On and Off

1

Vehicle Stability Assist® (VSA®), aka Electronic Stability Control 
(ESC), System

In certain unusual conditions when your vehicle gets 
stuck in shallow mud or fresh snow, it may be easier 
to free it with the VSA® temporarily switched off.

When the 

 button is pressed, the traction control 

function becomes less effective. This allows for the 
wheels to spin more freely at low speed. You should 
only attempt to free your vehicle with the VSA® off if 
you are not able to free it when the VSA® is on.

Immediately after freeing your vehicle, be sure to 
switch VSA® on again. We do not recommend driving 
your vehicle with the VSA® system switched off.

You may hear a motor sound coming from the 
engine compartment while system checks are being 
performed immediately after starting the engine or 
while driving. This is normal.

VSA® OFF Indicator

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When Driving

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Agile Handling Assist

Driving

Agile Handling Assist

Lightly brakes each of the front and rear wheels, as needed, when you turn the 
steering wheel, and helps support the vehicle’s stability and performance during 
cornering.

Precision All-Wheel Steer

TM

 (P-AWS®) System

*

Monitors road conditions while you are driving. In response to current driving 
conditions, the system automatically makes slight adjustment to the relative rear 
wheel toe settings to help enhance vehicle control and stability.

1

Agile Handling Assist

The agile handling assist cannot enhance stability in 
all driving situations. You still need to drive and 
corner at speeds appropriate for the conditions and 
always leave a sufficient margin of safety.

When the VSA® system indicator comes on and stays 
on while driving, the agile handling assist does not 
activate.

You may hear a sound coming from the engine 
compartment while the agile handling assist is 
activated. This is normal.

1

Precision All-Wheel Steer

TM

 (P-AWS®) System

*

The Precision All-Wheel Steer

TM

 (P-AWS®) system 

cannot enhance vehicle control and stability in all 
driving situations. You still need to drive and corner 
at speeds appropriate for the conditions and always 
leave a sufficient margin of safety.

The toe setting of the rear wheels may get stuck in a 
non-centered setting if the system malfunctions 
while driving. This can cause the vehicle to pull to a 
side even as you keep the steering wheel in the 
center position. If this occurs, the system 
automatically limits the vehicle speed to a maximum 
of 50 mph (80 km/h). Reduce your speed and be 
extra cautious, as handling may be difficult. Go to a 
dealer immediately.

* Not available on all models

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When Driving

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Blind spot information (BSI) System

*

Driving

Blind spot information (BSI) System

*

Is designed to detect vehicles in specified alert zones adjacent to your vehicle, 
particularly in harder to see areas commonly known as “blind spots.”

When the system detects vehicles approaching from behind in adjacent lanes, the 
appropriate indicator comes on for a few seconds, providing assistance when you 
change lanes.

■

How the system works

1

Blind spot information (BSI) System

*

Important Safety Reminder
Like all assistance systems, BSI has limitations. Over 
reliance on BSI may result in a collision.

The BSI alert indicator may not come on under the 
following conditions:

•

A vehicle does not stay in the alert zone for more 
than two seconds.

•

A vehicle is parked in a side lane.

•

The speed difference between your vehicle and the 
vehicle you are passing is greater than 6 mph (10 
km/h).

•

An object not detected by the radar sensors 
approaches or passes your vehicle.

•

A vehicle running in the adjacent lane is a 
motorcycle or other small vehicle.

3

WARNING

Failure to visually confirm that it is safe to 
change lanes before doing so may result in 
a crash and serious injury or death. 
Do not rely only on the blind spot 
information system when changing lanes.

Always look in your mirrors, to either side 
of your vehicle, and behind you for other 
vehicles before changing lanes.

●

The transmission is in 

(

D or 

(

S.

●

Your vehicle speed is 
between 20 mph (32 km/h) 
and 100 mph (160 km/h)

Alert zone range
A: Approx. 1.6 ft. (0.5 m)
B: Approx. 10 ft. (3 m)
C: Approx. 10 ft. (3 m)

Radar Sensors:
underneath the 
rear bumper 
corners

Alert Zone

A

B

C

* Not available on all models

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When Driving

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Blind spot information (BSI) System

*

Driving

■

When the system detects a vehicle

BSI Alert Indicator: Located near the pillar on 
both sides.

Comes on when:
• A vehicle enters the alert zone from behind 

to overtake you with a speed difference of 
no more than 31 mph (50 km/h) from your 
vehicle.

• You pass a vehicle with a speed difference 

of no more than 12 mph (20 km/h).

Blinks and a beeper sounds when:
You move the turn signal lever in the direction 
of the detected vehicle. The beeper sounds 
three times.

1

Blind spot information (BSI) System

*

The system is for your convenience only. Even if an 
object is within the alert zone, the following 
situations may occur.

•

The BSI alert indicator may not come on due to 
obstruction (splashes, etc.) even without the Blind 
Spot Info Not Available multi-information 
display appearing.

•

The BSI alert indicator may come on even with the 
message appearing.

You can turn off the audible alert, or all the BSI alert 
using the information screen or multi-information 
display.

2 Customized Features P. 120, 292

BSI may be adversely affected when:

•

Objects (guard rails, poles, trees, etc,.) are 
detected.

•

An object that does not reflect radio waves well, 
such as a motorcycle, is in the alert zone.

•

Driving on a curved road.

•

A vehicle is moving from a far lane to the adjacent 
lane.

•

The system picks up external electrical interference.

•

The rear bumper or the sensors have been 
improperly repaired or the rear bumper has been 
deformed.

•

The orientation of the sensors has been changed.

•

In bad weather (Heavy rain, snow, and fog).

The system does not operate when in 

(

R.

Comes On

Blinks

* Not available on all models

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