Honda Accord Coupe (2017 year). Instruction - part 29

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When Driving

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Adaptive Cruise Control (ACC)

*

448

Driving

1

Adaptive Cruise Control (ACC)

*

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

ACC may not work properly under certain conditions.

2 ACC Conditions and Limitations P. 452

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.

How to use

■

Press the MAIN button on 
the steering wheel.

ACC is on in the multi-
information display.
ACC is ready to use.

* Not available on all models

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When Driving

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Adaptive Cruise Control (ACC)

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Driving

Take your foot off the pedal and press down the –/SET button when you reach the 
desired speed. The moment you release the button, the set speed is fixed, and ACC 
begins.

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

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To Set the Vehicle Speed

1

To Set the Vehicle Speed

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

2 Customized Features P. 106, 298, 316

On when ACC 
begins

Press and release

−/SET Button

Set Vehicle Speed

Set Vehicle Distance

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When Driving

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Adaptive Cruise Control (ACC)

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Driving

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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-distance from the vehicle ahead.

2 To Set or Change Following-Distance P. 455

When a vehicle whose speed is slower than 
your set speed comes in or cuts in front of you 
and is detected by the radar, your vehicle 
starts to slow down.

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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 
distance from the vehicle ahead.

Even if the distance 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 distance 
between the vehicles.

You can also set the system to beep when a vehicle 
detected 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. 106, 298, 316

Beep

ACC Range: 394 ft. (120 m)

A vehicle icon appears on the 
multi-information display.

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Adaptive Cruise Control (ACC)

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Driving

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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.

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When you depress the accelerator pedal

You can temporarily increase the vehicle speed.
ACC stays on unless you cancel it. Once you release the accelerator pedal, the 
system resumes the set speed or a sufficient speed to keep the following-distance.

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

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When you depress the accelerator pedal

While the accelerator pedal is depressed, the system 
does not apply the brakes to keep the following-
distance, as well as the BRAKE message on the multi-
information display does not appear.

2 When in Operation P. 450

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When Driving

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Adaptive Cruise Control (ACC)

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452

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. 445

■

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.
• When the front of the vehicle tilts up due to heavy cargo in the trunk or rear seats.
• When tire chains are installed.

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ACC Conditions and Limitations

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ACC Conditions and Limitations

The radar sensor for ACC is shared with the collision 
mitigation braking system

TM

 (CMBS

TM

).

2 Collision Mitigation Braking System

TM

 

(CMBS

TM

)

*

 P. 483

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

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

•

You drive the vehicle where the water is deep.

•

Your vehicle has a frontal collision.

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

2 Front Sensor Camera

*

 P. 445

* Not available on all models

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Adaptive Cruise Control (ACC)

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Detection limitations

• A vehicle or pedestrian suddenly crosses in front of you.
• The distance 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.

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Adaptive Cruise Control (ACC)

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Driving

Increase or decrease the vehicle speed using the RES/+ or –/SET buttons 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.

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To Adjust the Vehicle Speed

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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 
following-distance between your vehicle and the 
vehicle ahead.

To increase speed

To decrease speed

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Adaptive Cruise Control (ACC)

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Driving

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

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

■

To Set or Change Following-Distance

Distance 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-distance becomes. See the following examples for your 
reference.

Vehicle Distance

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

Continued

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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.

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The ACC indicator (white) goes off.

• Depress the brake pedal.

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To Cancel

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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/+ 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

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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 at the lower part of the front bumper 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/+ button.

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Adaptive Cruise Control (ACC)

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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, press and hold the   button again for one second.

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To Switch ACC to Cruise Control

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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-distance from a vehicle 
ahead of you.

ACC ON

Cruise 
Control ON

Distance Button

460

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When Driving

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Road Departure Mitigation (RDM) System

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Driving

Road Departure Mitigation (RDM) System

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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.

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.

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How the System Works

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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. 445

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

2 RDM Conditions and Limitations P. 462

* Not available on all models

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Road Departure Mitigation (RDM) System

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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.

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How the System Activates

■

RDM On and Off

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How the System Activates

The RDM system may automatically shut off and the 

 indicator comes and stays on.

2 Indicators P. 70

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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Road Departure Mitigation (RDM) System

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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.

■

RDM Conditions and Limitations

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Road Departure Mitigation (RDM) System

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Driving

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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.

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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.