HONDA ACCORD SEDAN 2020 Owner's Manual (in English)

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uuHonda Sensing ®u Adaptive Cruise Control (ACC)*
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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.1Adaptive 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 betw een your vehicle and other vehicles.
3WARNING
Improper use of ACC can lead to a crash.
Use ACC only when driving on
expressways or freeways in good
weather conditions.
3WARNING
ACC has limited braking capability.
When your vehicle speed drops below
25 mph (40 km/h), ACC will
automatically cancel and no longer will
apply your ve hicle’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) ~.
■Gear position for ACC: In ( 2 or higher position. The radar sensor is at the
lower part of the front
bumper.
The camera is
located behind the
rearview mirror.
* Not available on all models

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■How to activate the system1Adaptive 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. 544
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 traf fic 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 faci lities with driv e through access.
When the engine speed slows down, try to
downshift.
When the engine speed goes up, try to upshift.
You can maintain the set sp eed if you change gear
within five seconds.
How to use
■Press the MAIN button on
the steering wheel.
ACC (green) is on in the instrument panel.
ACC is ready to use.
* Not available on all models

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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,
interval bars and set speed appear on the
driver information interface.
When you use ACC, 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 Speed1To Set the Vehicle Speed
You can switch the displayed set speed
measurements on the driver information interface or
audio/information screen between mph and km/h. 2 Speed Unit P. 149
2 Customized Features P. 383
The Vehicle Stability Assist
TM (VSA ®) system, Vehicle
Stability AssistTM (VSA ®) OFF, adaptive cruise control
(ACC), safety support and low tire pressure/TPMS
indicators may come on in amber along with a
message in the driver info rmation interface when you
set the power mode to ON after reconnecting the
battery.
Drive a short distance at mo re than 12 mph (20 km/h).
Each indicator should go off. If any do not, have your
vehicle checked by a dealer.On when ACC begins
Press and release
SET /− Button
Set Vehicle Speed
Set Vehicle Interval

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■There is a vehicle ahead
ACC monitors if a vehicle ahead of you ente rs the ACC range. If a vehicle is detected
doing so, the ACC system maintains or decele rates your vehicle’s set speed in order
to keep the vehicle’s se t following interval from the vehicle ahead.
2To Set or Change Following Interval P. 548
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 Operation1 When in Operation
If the vehicle detected ahead of you slows down
abruptly, or if a nother vehicle is de tected cutting in
front of you, the beep er sounds and a message
appears on the driver information interface.
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
driver information interface.

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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 ve hicle 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 alert 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 an appropriate speed for keeping the following interval while a
vehicle ahead is within the ACC range.
1 When in Operation
Even if the interval betw een your vehicle and the
vehicle detected ahead is short, ACC may start
accelerating your vehi cle 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, gradua lly 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. 383
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. 544
A vehicle icon with dotted-line
contour appears on the driver
information interface.
1When you depress the accelerator pedal
While the accelerator pedal is depressed, the system
does not apply the brakes to keep the following
interval, as well as the BRAKE message on the driver
information interface does not appear.
2 When in Operation P. 542

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The system may automatically shut off and the ACC indicator will come on under
certain conditions. Some examples of th ese conditions are listed below. Other
conditions may reduce some of the ACC functions.
■Environmental conditions
• Driving in bad weather (rain, fog, snow, etc.).
■Roadway conditions
• Driving on a snowy or wet roadway (obs cured lane marking, vehicle tracks,
reflected lights, road spray, high contrast).
■Vehicle conditions
• The outside of the windshie ld is blocked by dirt, mud, leaves, wet snow, etc.
• An abnormal tire or wheel condition (Wrong sized, varied size or construction,
improperly inflated, comp act 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.
■ACC Conditions and Limitations1ACC Conditions and Limitations
For directions on the prop er handling of the radar
sensor, refer to the following page. 2 Radar Sensor P. 574
You can read about handling information for the
camera equipped with this system. 2 Front Sensor Camera P. 572
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 se nsor 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 ra dar sensor may not work
properly. Have your vehi cle 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.
* Not available on all models

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■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 vehi cle 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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• 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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Increase or decrease the vehicle speed using the RES/+ or SET /– button on the
steering wheel.
• Each time you press the RES/+ or SET /– button, the vehicle speed is increased or
decreased by about 1 mph or 1 km/h accordingly.
• If you keep pressing the RES/+ or SET/– button, the vehicle speed increases or
decreases by about 5 mph or 5 km/h accordingly.
■To Adjust the Vehicle Speed1 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 vehi cle and the vehicle ahead.
When you depress the accelerator pedal and then
push and release the SET/– button, the current speed
of the vehicle is set.
To increase speed
To decrease speed

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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