Acura RLX Hybrid (2017 year). Manual - part 25

392

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When Driving

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Adaptive Cruise Control (ACC) with Low Speed Follow (LSF)

Driving

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

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

Following-distance

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

204 feet

62 meters

2.8 sec

265 feet

81 meters

2.8 sec

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When Driving

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Adaptive Cruise Control (ACC) with Low Speed Follow (LSF)

Driving

To cancel ACC with LSF, do any of the 
following:
• Press the CANCEL button.
• Press the MAIN button.

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ACC with LSF indicator goes off.

• Depress the brake pedal.

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When the LSF function has stopped the 
vehicle, you cannot cancel ACC with LSF 
by depressing the brake pedal.

■

To Cancel

1

To Cancel

Resuming the prior set speed: After you have 
canceled ACC with LSF, 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 LSF 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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When Driving

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Adaptive Cruise Control (ACC) with Low Speed Follow (LSF)

394

Driving

■

Automatic cancellation

The beeper sounds and a message appears on the multi-information display when 
ACC with LSF is automatically canceled. Any of these conditions may cause the ACC 
with LSF to automatically cancel:
• Bad weather (rain, fog, snow, etc.)
• When the radar sensor in the front grille 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 LSF range is too close to your 

vehicle.

• The camera behind the rearview mirror, or the area around the camera, including 

the windshield, gets dirty.

The ACC with LSF 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 power system is turned off.

1

Automatic cancellation

Even though ACC with LSF has been automatically 
canceled, you can still resume the prior set speed. 
Wait until the condition that caused ACC with LSF to 
cancel improves, then press the RES/+/SET/– switch 
down.

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When Driving

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Adaptive Cruise Control (ACC) with Low Speed Follow (LSF)

Driving

Press and hold the   (distance) 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 LSF, press and 
hold the   button again for one second. ACC 
Mode Selected appears on the multi-
information display for two seconds.

■

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.

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 Switch ACC with LSF to Cruise Control

1

To Switch ACC with LSF 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.

ACC with 
LSF ON

Cruise 
Control ON

■

To Set the Vehicle Speed

■

To Adjust the Vehicle Speed

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When Driving

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Adaptive Cruise Control (ACC) with Low Speed Follow (LSF)

396

Driving

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 Cancel

1

To Cancel

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 canceled automatically.

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397

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When Driving

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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 determines a possibility of your 
vehicle unintentionally crossing over detected lane markings.

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. 113, 283

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. 381

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

2 RDM Conditions and Limitations P. 399

There are times when you may not notice RDM 
functions due to your operation of the vehicle, or 
road surface conditions. If the Lane Departure 
message displays repeatedly and you do not apply 
responsive actions, the system beeps and cancels 
RDM functions.

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When Driving

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Road Departure Mitigation (RDM) System

398

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 system makes a determination that the driver is not actively accelerating, 

braking or steering.

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.

■

How the System Activates

■

RDM On and Off

1

How the System Activates

The RDM system may automatically shut off and the 

 indicator comes and stays on.

2 Indicators P. 74

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.

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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399

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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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400

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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. 104

Do not place objects on the instrument panel. 
Objects may reflect on the front 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. 406

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

2 Front Sensor Camera P. 381

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.

■

LKAS 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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When Driving

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Lane Keeping Assist System (LKAS)

402

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 on 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 lane is detected, 
system will recover automatically.

■

Lane Departure Warning Function

Warning Area

Warning Area

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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)

404

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 turn the 
power system off, even if you turned it on the 
last time you drove the vehicle.

■

To cancel

1

When the System can be Used

The LKAS temporarily deactivates when it fails to 
detect lane lines. When the system detects the lines 
again, it comes back on automatically.

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.

• 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.
• The vehicle runs on a curved road over the speed limit.
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.

• Driving through a sharp curve.
• Driving at a speed in excess of approximately 90 mph (145 km/h).
• The ABS or VSA system engages.
The beeper sounds if the LKAS is automatically canceled.

When the LKAS is suspended, 
the lane lines on the multi-
information display change to 
contour lines, and the beeper 
sounds.

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406

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When Driving

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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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407

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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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