Acura ILX (2021 year). Manual in english — page 29

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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)

Continued

Driving

Adaptive Cruise Control (ACC)

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

1

Adaptive Cruise Control (ACC)

Important Reminder

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

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

2

Radar Sensor

P. 495

3

WARNING

Improper use of ACC can lead to a crash.

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

3

WARNING

ACC has limited braking capability.

When your vehicle speed drops below 22
mph (35 km/h), ACC will automatically
cancel and no longer will apply your
vehicle’s brakes.

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

When to use

■

Vehicle speed for adaptive cruise control: Desired speed in a range above

roughly 25 mph (40 km/h) ~

■

Shift positions for ACC: 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)

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Driving

■

How to activate the system

1

Adaptive Cruise Control (ACC)

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

2

Front Sensor Camera

P. 493

When the

MAIN

button is pressed, both ACC and

the Lane Keeping Assist System (LKAS) are either
turned on or off.

ACC may not work properly under certain conditions.

2

ACC Conditions and Limitations

P. 468

When not using ACC: Turn off adaptive cruise by
pressing the

MAIN

button. This also will turn off the

Lane Keeping Assist System (LKAS).

Do not use ACC 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 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.

■

Press the

MAIN

button on

the steering wheel.

ACC

(green) is on in the

instrument panel.
ACC is ready to use.

How to use

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Adaptive Cruise Control (ACC)

Continued

Driving

Take your foot off the pedal and press the

DECEL/SET

button when you reach the

desired speed.

The moment you release the button, the set
speed is fixed, and ACC begins.

u

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

■

To Set the Vehicle Speed

On when ACC

begins

Press and release

DECEL/SET

Button

Set Vehicle Speed

Set Vehicle Interval

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Adaptive Cruise Control (ACC)

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Driving

■

There is a vehicle ahead

ACC monitors if a vehicle ahead of you enters the ACC range. If a vehicle is detected
doing so, the ACC 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. 472

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 detected ahead of you slows down
abruptly, or if another vehicle is detected cutting in
front of you, the beeper sounds and a message
appears on the multi-information display.

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

Beep

ACC Range: 394 ft. (120 m)

A vehicle icon appears on the

multi-information display

Continued

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Adaptive Cruise Control (ACC)

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 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 alerts even if a vehicle is in the ACC range.
ACC stays on unless you cancel it. Once you release the accelerator pedal, the
system resumes the set speed.
There are times when the vehicle speed will decrease when the accelerator pedal is
lightly applied.

1

When in Operation

Even if the interval between your vehicle and the
vehicle detected ahead is short, ACC 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
detecting range. Change the

ACC Forward Vehicle

Detect Beep

setting.

2

Customized Features

P. 99, 315

Limitations

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

2

ACC Conditions and Limitations

P. 468

A vehicle icon with dotted-line

contour appears on the multi-

information display

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Adaptive Cruise Control (ACC)

468

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. 493

2

Radar Sensor

P. 495

■

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 Conditions and Limitations

1

ACC Conditions and Limitations

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)

Continued

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)

Driving

•

When driving through a narrow metal 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.

Continued

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Adaptive Cruise Control (ACC)

Driving

Increase or decrease the vehicle speed using the

RES/ACCEL

or

DECEL/SET

buttons

on the steering wheel.

•

Each time you press the button, the vehicle speed is increased or decreased by
about 1 mph or 1 km/h accordingly.

•

If you keep the button pressed, 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 may not
accelerate your vehicle. This is to maintain the set
interval between your vehicle and the vehicle ahead.

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

2

Customized Features

P. 99, 315

To increase speed

To decrease speed

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Adaptive Cruise Control (ACC)

Driving

Press the (interval) button to change the
ACC 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)

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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.

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

215 feet

66 meters

3.0 sec

285 feet

87 meters

3.0 sec

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Adaptive Cruise Control (ACC)

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Driving

To cancel ACC, do any of the following:

•

Press the

CANCEL

button.

•

Press the

MAIN

button.

u

ACC

indicator goes off.

•

Depress the brake pedal.

■

To Cancel

1

To Cancel

Resuming the prior set speed: After you have
canceled ACC, you can resume the prior set speed
while it is still displayed. Press the

RES/ACCEL

button

when driving at a speed of at least 25 mph (40 km/h)
or more.

The set speed cannot be set or resumed when ACC
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

Continued

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Adaptive Cruise Control (ACC)

Driving

■

Automatic cancellation

The beeper sounds and a message appears on the multi-information display when
ACC is automatically canceled. Any of these conditions may cause the ACC 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 you manually apply the parking brake.

•

When the detected vehicle within the ACC range is too close to your vehicle.

•

The camera behind the rearview mirror, or the area around the camera, including
the windshield, gets dirty.

1

Automatic cancellation

Even though ACC has been automatically canceled,
you can still resume the prior set speed. Wait until the
condition that caused ACC to cancel improves, then
press the

RES/ACCEL

button.

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Adaptive Cruise Control (ACC)

476

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, 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

DECEL/SET

button when you reach the

desired speed.
The moment you release the

DECEL/SET

button, the set speed is fixed, and cruise

control begins. The

CRUISE CONTROL

indicator comes on.

Each time you press the

RES/ACCEL

or

DECEL/SET

button, the vehicle speed is

increased or decreased by about 1 mph (1.6 km/h).
If you keep the

RES/ACCEL

or

DECEL/SET

button pressed, the vehicle speed

increases or decreases until you release it. This speed is then set.

■

To Switch ACC to Cruise Control

1

To Switch ACC 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.

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

2

Customized Features

P. 99, 315

ACC ON

Cruise

Control ON

■

To Set the Vehicle Speed

■

To Adjust the Vehicle Speed

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Adaptive Cruise Control (ACC)

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/

ACCEL

button 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 is canceled automatically.