Acura RLX (2018 year). Instruction — part 26

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When Driving

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

Driving

The system may automatically shut off and the ACC indicator will come on under
certain conditions. Some examples of these conditions are listed below. Other
conditions may reduce some of the ACC functions.

2 Front Sensor Camera P. 402

■

Environmental conditions

• Driving in bad weather (rain, fog, snow, etc.).

■

Roadway conditions

• Driving on a snowy or wet roadway (obscured lane marking, vehicle tracks,

reflected lights, road spray, high contrast).

■

Vehicle conditions

• The outside of the windshield is blocked by dirt, mud, leaves, wet snow, etc.
• An abnormal tire or wheel condition (Wrong sized, varied size or construction,

improperly inflated, compact spare tire

*

, etc.).

• The camera temperature gets too high.
• The parking brake is applied.
• When the front grille is dirty.
• The vehicle is tilted due to a heavy load or suspension modifications.
• When tire chains are installed.

■

ACC with LSF Conditions and Limitations

1

ACC with LSF Conditions and Limitations

The radar sensor for ACC with LSF is shared with the
Collision Mitigation Braking System

TM

(CMBS

TM

).

2 Collision Mitigation Braking System

TM

(CMBS

TM

) P. 460

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

2 Front Sensor Camera P. 402

Always keep the radar sensor cover clean.

Never use chemical solvents or polishing powder for
cleaning the sensor cover. Clean it with water or a
mild detergent.

Do not put a sticker on the radar sensor cover or
replace the radar sensor cover.

If you need the radar sensor to be repaired, or
removed, or the radar sensor cover is strongly
impacted, turn off the system by pressing the MAIN
button and take your vehicle to a dealer.

Have your vehicle checked by a dealer if you find any
unusual behavior of the system (e.g., the warning
message appears too frequently).

* Not available on all models

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

410

Driving

■

Detection limitations

• A vehicle or pedestrian suddenly crosses in front of you.
• The interval between your vehicle and the vehicle or pedestrian ahead of you is

too short.

• A vehicle cuts in front of you at a slow speed, and it brakes suddenly.
• When you accelerate rapidly and approach the vehicle or pedestrian ahead of you

at high speed.

• The vehicle ahead of you is a motorcycle, bicycle, mobility scooter, or other small

vehicle.

• When there are animals in front of your vehicle.
• When you drive on a curved or winding or undulating road that makes it difficult

for the sensor to properly detect a vehicle or a pedestrian in front of you.

• The speed difference between your vehicle and a vehicle or pedestrian in front of

you is significantly large.

• An oncoming vehicle suddenly comes in front of you.
• Your vehicle abruptly crosses over in front of an oncoming vehicle.
• When driving through a narrow iron bridge.
• When the vehicle ahead of you brakes suddenly.
• When the vehicle ahead of you has a unique shape.
• When your vehicle or the vehicle ahead of you is driving on one edge of the lane.

1

ACC with LSF Conditions and Limitations

If the front of the vehicle is impacted in any of the
following situations, the radar sensor may not work
properly. Have your vehicle checked by a dealer:

•

The vehicle mounted onto a bump, curb, chock,
embankment, etc.

•

You drive the vehicle where the water is deep.

•

Your vehicle has a frontal collision.

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When Driving

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

Driving

Increase or decrease the vehicle speed using the RES/+/SET/– switch on the steering
wheel.

• Each time you press the switch up or down, the vehicle speed is increased or

decreased by about 1 mph or 1 km/h accordingly.

• If you keep the switch pressed up or down, the vehicle speed increases or

decreases by about 5 mph or 5 km/h accordingly.

■

To Adjust the Vehicle Speed

1

To Adjust the Vehicle Speed

If a vehicle detected ahead is going at a speed slower
than your increased set speed, ACC with LSF may not
accelerate your vehicle. This is to maintain the set
following-interval between your vehicle and the
vehicle ahead.

To increase speed

To decrease speed

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When Driving

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

Driving

Press the (interval) button to change the
ACC with LSF following-interval.
Each time you press the button, the following-
interval (the interval behind a vehicle detected
ahead of you) setting cycles through short,
middle, long, and extra long following-
interval.

Determine the most appropriate following-
interval setting based on your specific driving
conditions. Be sure to adhere to any
following-interval requirements set by local
regulation.

■

To Set or Change Following-Interval

Interval Button

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When Driving

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

Continued

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 LSF
interval setting.

Following-interval

When the Set Speed is:

50 mph (80 km/h)

65 mph (104 km/h)

Short

84 feet

26 meters

1.1 sec

102 feet

31 meters

1.1 sec

Middle

111 feet

34 meters

1.5 sec

139 feet

43 meters

1.5 sec

Long

155 feet

48 meters

2.1 sec

202 feet

62 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)

414

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)

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 instructionly 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
up.

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When Driving

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

416

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 LSF, press and
hold the (interval) 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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Adaptive Cruise Control (ACC) with Low Speed Follow (LSF)

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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When Driving

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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. 297

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.

■

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. 402

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

2 RDM Conditions and Limitations P. 421

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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When Driving

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Road Departure Mitigation (RDM) System

Driving

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.

1

Road Departure Mitigation (RDM) System

If LKAS is off and you have selected Narrow from the
customized options using the audio/information
screen, the message below will appear in case the
system determines a possibility of your vehicle
crossing over detected lane markings.

2 Customized Features P. 297

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Road Departure Mitigation (RDM) System

420

Driving

The system becomes ready to start searching for lane markings when all the
following conditions are met:
• The vehicle is traveling between 45 and 89 mph (72 and 144 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.

u

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. 76

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 audio/information
screen, the system does not operate the steering
wheel and braking.

2 Customized Features P. 297

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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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.
• The road has ruts.

■

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. 94

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. 428

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

2 Front Sensor Camera P. 402

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)

424

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 lane is detected,
system will recover automatically.

■

Lane Departure Warning Function

Warning Area

Warning Area

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