Acura RDX (2019 year). Instruction — page 29

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Collision Mitigation Braking System

TM

(CMBS

TM

)

Driving

The CMBS

TM

may activate even when you are aware of a vehicle ahead of you, or

when there is no vehicle ahead. Some examples of this are:

When Passing

Your vehicle approaches another vehicle ahead of you and you change lanes to pass.

At an intersection

Your vehicle approaches or passes another vehicle that is making a left or right turn.

With Little Chance of a Collision

1

With Little Chance of a Collision

Do not paint, or apply any coverings or paint to radar
sensor area. This can impact CMBS

TM

operation.

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Collision Mitigation Braking System

TM

(CMBS

TM

)

Driving

On a curve

When driving through curves, your vehicle comes to a point where an oncoming
vehicle is right in front of you.

Through a low bridge at high speed

You drive under a low or narrow bridge at high speed.

Speed bumps, road work sites, train tracks, roadside objects, etc.

You drive over speed bumps, steel road plates, etc., or your vehicle approaches train
tracks or roadside objects (such as a traffic sign and guard rail) on a curve or, when
parking, stationary vehicles and walls.

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

Continued

Driving

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

Helps maintain a constant vehicle speed and a set following interval behind a vehicle
detected ahead of yours and, if the detected vehicle comes to a stop, can decelerate
and stop your vehicle, without you having to keep your foot on the brake or the
accelerator.
When ACC with LSF slows your vehicle by applying the brakes, your vehicle’s brake
lights will illuminate.

1

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

Important Reminder
As with any system, there are limits to ACC with LSF.
Use the brake pedal whenever necessary, and always
keep a safe interval between your vehicle and other
vehicles.

ACC with LSF can not be activated if Intelligent
Dynamics System setting is Snow.

3

WARNING

Improper use of ACC with LSF can lead to a
crash.

Use ACC with LSF only when driving on
expressways or freeways and in good
weather conditions.

3

WARNING

ACC with LSF has limited braking capability
and may not stop your vehicle in time to
avoid a collision with a vehicle that quickly
stops in front of you.

Always be prepared to apply the brake
pedal if the conditions require.

When to use

Vehicle speed for ACC with LSF: A vehicle is detected ahead within ACC with
LSF range
– ACC with LSF operates at speeds up to 90 mph (145 km/h).
No vehicle is detected within ACC with LSF range – ACC with LSF operates at
the speed of 25 mph (40 km/h) or above.

Gear position for ACC with LSF: In

(

D or

(

S.

The radar sensor
is behind the
emblem.

The camera is
located behind
the rearview
mirror.

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

456

Driving

How to activate the system

1

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

When the MAIN button is pressed, both ACC with
LSF and the Lane Keeping Assist System (LKAS) are
either turned on or off.

ACC with LSF may not work properly under certain
conditions.

2 ACC with LSF Conditions and Limitations

P. 461

When not using ACC with LSF: Turn off adaptive
cruise by pressing the MAIN button. This also will
turn off the Lane Keeping Assist System (LKAS).

Do not use ACC with LSF under the following
conditions:

On roads with heavy traffic or while driving in
continuous stop and go traffic.

On roads with sharp turns.

On roads with steep downhill sections, as the set
vehicle speed can be exceeded by coasting. In such
cases, ACC with LSF will not apply the brakes to
maintain the set speed.

On roads with toll collection facilities or other
objects between lanes of traffic, or in parking
areas, or facilities with drive through access.

How to use

Press the MAIN button on
the steering wheel.

ACC (green) is on in the instrument panel.
ACC with LSF is ready to use.

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

Driving

When driving at about 25 mph (40 km/h) or above: Take your foot off the
pedal and press down the RES/+/SET/– switch when you reach the desired speed.
The moment you release the switch, the set speed is fixed, and ACC with LSF begins.
When driving slower than about 25 mph (40 km/h): If the vehicle is moving
and the brake pedal is not depressed, pressing the switch fixes your set speed to
about 25 mph (40 km/h) regardless of current vehicle speed. If your vehicle is
stationary, you can set the vehicle speed even with the brake pedal depressed.

When ACC with LSF starts operating, the
vehicle icon, interval bars and set speed
appear on the multi-information display.

When you use ACC with LSF, Straight Driving
Assist (a feature of the Electric Power Steering
system) is activated.
By enabling the steering system to
automatically compensate for natural steering
pull, Straight Driving Assist makes it easier for
you to keep your vehicle in a straight line.

To Set the Vehicle Speed

1

To Set the Vehicle Speed

You can switch the displayed set speed
measurements on the multi-information display or
audio/information screen between mph and km/h.

2 Speed/Distance Units P. 134
2 Customized Features P. 332

On when ACC with LSF
begins

Press and release

RES/+/SET/– switch

Set Vehicle Speed

Set Vehicle Interval

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

458

Driving

There is a vehicle ahead

ACC with LSF monitors if a vehicle ahead of you enters the ACC with LSF range. If a
vehicle is detected doing so, the ACC with LSF system maintains or decelerates your
vehicle’s set speed in order to keep the vehicle’s set following-interval from the
vehicle ahead.

2 To Set or Change Following-interval P. 465

When a vehicle whose speed is slower than
your set speed is detected in front of you, your
vehicle starts to slow down.

When in Operation

1

When in Operation

If the vehicle ahead of you slows down abruptly, or if
another vehicle cuts in front of you, the beeper
sounds, a message appears on the multi-information
display, and the head-up warning lights

*

flash.

Depress the brake pedal, and keep an appropriate
interval from the vehicle ahead.

Beep

ACC with LSF Range: 394 ft. (120 m)

A vehicle icon appears on the
multi-information display.

* Not available on all models

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

Driving

There is no vehicle ahead

Your vehicle maintains the set speed without
having to keep your foot on the brake or
accelerator pedal.
If there previously was a vehicle detected
ahead that kept your vehicle from traveling at
the set speed, ACC with LSF accelerates your
vehicle to the set speed, and then maintains it.

When you depress the accelerator pedal

You can temporarily increase the vehicle speed. In this case, there is no audible or
visual alert even if a vehicle is in the ACC with LSF range.
ACC with LSF stays on unless you cancel it. Once you release the accelerator pedal,
the system resumes an appropriate speed for keeping the following interval while a
vehicle ahead is within the ACC with LSF range.

1

When in Operation

Even if the interval between your vehicle and the
vehicle detected ahead is short, ACC with LSF may
start accelerating your vehicle under the following
circumstances:

The vehicle ahead of you is going at almost the
same speed as, or faster than, your vehicle.

A vehicle that cuts in front of you is going faster
than your vehicle, gradually increasing the interval
between the vehicles.

You can also set the system to beep when a vehicle in
front of you comes in and goes out of the ACC with
LSF detecting range. Change the ACC Forward
Vehicle Detect Beep
setting.

2 Customized Features P. 332

Limitations
You may need to use the brake to maintain a safe
interval when using ACC with LSF. Additionally, ACC
with LSF may not work properly under certain
conditions.

2 ACC with LSF Conditions and Limitations

P. 461

A vehicle icon with dotted-line
contour appears on the multi-
information display.

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

460

Driving

A vehicle detected ahead is within ACC with LSF range and slows to a stop

Your vehicle also stops, automatically. The
Stopped message appears on the multi-
information display.
When the vehicle ahead of you starts again,
the vehicle icon on the multi-information
display blinks. If you press the RES/+/SET/–
switch up or down, or depress the accelerator
pedal, ACC with LSF operates again within the
prior set speed.
If no vehicle is ahead of you before you
resume driving, depress the accelerator pedal
and ACC with LSF will operate again within
the prior set speed.

1

A vehicle detected ahead is within ACC with LSF range and slows
to a stop

3

WARNING

Exiting a vehicle that has been stopped
while the ACC with LSF system is operating
can result in the vehicle moving without
operator control.

A vehicle that moves without operator
control can cause a crash, resulting in
serious injury or death.

Never exit a vehicle when the vehicle is
stopped by ACC with LSF.

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

Driving

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

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 radar sensor cover 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

For directions on the proper handling of the radar
sensor, refer to the following page.

2 Radar Sensor P. 485

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

2 Front Sensor Camera P. 483

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)

Driving

Detection limitations

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

• The speed difference between your vehicle and a vehicle 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.

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

Continued

Driving

• 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.

Radar detects upper section of
an empty carrier truck.

Panel truck, tanker
truck, etc.

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

464

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 pressing the switch 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
interval between your vehicle and the vehicle ahead.

When you depress the accelerator pedal and then
press down and release the RES/+/SET/– switch, the
current speed of the vehicle is set.

To increase speed

To decrease speed

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

Continued

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 extra
long, long, middle, and short following-
intervals.

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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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-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

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

207 feet

63 meters

2.9 sec

272 feet

83 meters

2.9 sec

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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.

u

The ACC with LSF indicator (green) goes
off.

• Depress the brake pedal.

u

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

468

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 behind the emblem 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.

• When a detected vehicle goes out of the ACC with LSF range while your vehicle

is stationary.

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

the windshield, gets dirty.

• When the Maximum Load Limit is exceeded.
• When passing through an enclosed space, such as tunnel.

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 engine 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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