Acura MDX (2020 year). Manual in english - page 31

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When Driving

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Adaptive Cruise Control (ACC) with Low Speed Follow

Driving

■

There is a vehicle ahead

ACC with Low Speed Follow monitors if a vehicle ahead of you enters the ACC with 
Low Speed Follow range. If a vehicle is detected doing so, the ACC with Low Speed 
Follow 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. 499

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 MID, and the head-up warning lights

*

 

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

Even if the interval between your vehicle and the 
vehicle detected ahead is short, ACC with Low Speed 
Follow 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.

Beep

Head-up Warning 
Lights

*

ACC with Low Speed Follow Range: 394 ft. (120 m)

A vehicle icon appears 
on the MID.

* Not available on all models

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When Driving

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Adaptive Cruise Control (ACC) with Low Speed Follow

494

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 Low Speed Follow 
accelerates your vehicle to the set speed, and 
then maintains it.

While stationary and no vehicle is detected, 
ACC with Low Speed Follow automatically 
cancels and a beeper sounds.

■

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 Low Speed Follow range.
ACC with Low Speed Follow 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.

A vehicle icon with dotted-line 
contour appears on the MID.

1

When in Operation

You can also set the system to beep when a vehicle in 
front of you comes in and goes out of the ACC with 
Low Speed Follow detecting range. Change the 

ACC 

Forward Vehicle Detect Beep

 setting.

2

Customized Features

 P. 126, 358

Limitations

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

2

ACC with Low Speed Follow Conditions 
and Limitations

 P. 496

Continued

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When Driving

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Adaptive Cruise Control (ACC) with Low Speed Follow

Driving

■

A vehicle detected ahead is within ACC with Low Speed Follow range and 
slows to a stop

Your vehicle also stops, automatically. The 

Stopped

 message appears on the MID.

When the vehicle ahead of you starts again, 
the vehicle icon on the MID blinks. If you press 
the 

RES/+

/

SET/–

 switch up or down, or 

depress the accelerator pedal, ACC with Low 
Speed Follow operates again within the prior 
set speed.

1

A vehicle detected ahead is within ACC with Low Speed Follow 
range and slows to a stop

3

WARNING

Exiting a vehicle that has been stopped 
while the ACC with Low Speed Follow 
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 Low Speed Follow.

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Adaptive Cruise Control (ACC) with Low Speed Follow

496

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. 487

■

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 Low Speed Follow Conditions and Limitations

1

ACC with Low Speed Follow Conditions and Limitations

The radar sensor for ACC with Low Speed Follow is 
shared with the Collision Mitigation Braking System

TM

 

(CMBS

TM

).

2

Collision Mitigation Braking System

TM

 

(CMBS

TM

)

 P. 537

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

2

Front Sensor Camera

 P. 487

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.

* Not available on all models

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Adaptive Cruise Control (ACC) with Low Speed Follow

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 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 Low Speed Follow Conditions and Limitations

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).

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 impacted 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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Adaptive Cruise Control (ACC) with Low Speed Follow

498

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 Low Speed 
Follow 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 MID or information screen 
between mph and km/h.

2

Customized Features

 P. 126, 358

To increase speed

To decrease speed

499

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When Driving

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Adaptive Cruise Control (ACC) with Low Speed Follow

Continued

Driving

Press the   (interval) button to change the 
ACC with Low Speed Follow 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-
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

500

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When Driving

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Adaptive Cruise Control (ACC) with Low Speed Follow

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 Low 
Speed Follow 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

204 feet

62 meters

2.8 sec

265 feet

81 meters

2.8 sec

Continued

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Adaptive Cruise Control (ACC) with Low Speed Follow

Driving

To cancel ACC with Low Speed Follow, do any 
of the following:

•

Press the 

CANCEL

 button.

•

Press the 

MAIN

 button.

u

ACC with Low Speed Follow indicator 
goes off.

•

Depress the brake pedal.

u

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

■

To Cancel

1

To Cancel

Resuming the prior set speed: After you have 
canceled ACC with Low Speed Follow, 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 Low Speed Follow 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

502

Driving

■

Automatic cancellation

The beeper sounds and a message appears on the MID when ACC with Low Speed 
Follow is automatically canceled. Any of these conditions may cause the ACC with 
Low Speed Follow 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 Low Speed Follow range is too 
close to your vehicle.

•

When a detected vehicle goes out of the ACC with Low Speed Follow range while 
your vehicle is stationary.

•

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

The ACC with Low Speed Follow automatic cancellation can be also triggered by the 
following causes. In these cases, the electric 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.

•

When trailer stability assist is activated.

2

Trailer Stability Assist

 P. 459

1

Automatic cancellation

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

RES/+

/

SET/–

 switch up or down.

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When Driving

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Adaptive Cruise Control (ACC) with Low Speed Follow

Driving

Press and hold the   (interval) button for one 
second. 

Cruise Mode Selected

 appears on 

the MID for two seconds, and then the mode 
switches to Cruise.
To switch back to ACC with Low Speed 
Follow, press and hold the   button again for 
one second. 

ACC Mode Selected

 appears on 

the MID 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 Low Speed Follow to Cruise Control

1

To Switch ACC with Low Speed Follow 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 MID or information screen 
between mph and km/h.

2

Customized Features

 P. 126, 358

ACC with 
Low Speed 
Follow 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

504

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 is canceled automatically.

505

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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 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. 126, 358

As a visual alert, the 

Lane Departure

 

message appears on the MID.

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. 487

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

2

RDM Conditions and Limitations

 P. 508

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

506

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.

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 vehicle is not accelerating or braking, and the steering wheel is not being 
turned.

•

The system makes a determination that the driver is not actively accelerating, 
braking or steering.

■

How the System Activates

1

How the System Activates

The RDM system may automatically shut off and the 

 indicator comes and stays on.

2

Indicators

 P. 94

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.

Continued

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When Driving

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Road Departure Mitigation (RDM) System

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 MID 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 MID or information 
screen, the system does not operate the steering 
wheel and braking.

2

Customized Features

 P. 126, 358

RDM Button

Indicator

508

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Road Departure Mitigation (RDM) System

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