HONDA ACCORD SEDAN 2021 Owner's Manual (in English)

449
uuWhen Driving uTire Pressure Monitoring System (TPMS)
Driving
You can calibrate the system from the
customized feature on the audio/information
screen.
1. Set the power mode to ON.
2. Press the button.
3. Select Settings .
4. Select Vehicle .
5. Select TPMS Calibration .
6. Select Calibrate .
• If the Calibration Failed To Start.
message appears, repeat steps 5-6.
• The calibration process finishes
automatically.1TPMS Calibration
If the tire chains
* are installed, remove them before
calibrating the TPMS.
If the low tire pressure/TPMS indicator comes on even
when the properly inflated specified regular tires are
installed, have your vehi cle checked by a dealer.
We recommend that the tires be replaced with the
same brand, model, and size as the originals. Ask a
dealer for details.
* Not available on all models

450
uuWhen Driving uTire Pressure Monitoring System (TPMS) - Required Federal Explanation
Driving
Tire Pressure Monitoring System (TPMS) - Required
Federal Explanation
Each tire, including the spare (i f provided), should be checked
monthly when cold and inflated to the inflation pressure
recommended by the vehicle manufacturer on the vehicle placard
or tire inflation pressure label.
(If your vehicle has tires of a different size than the size indicated
on the vehicle placard or tire infl ation pressure label, you should
determine the proper tire inflat ion pressure for those tires.)
As an added safety feature, your vehicle has been equipped with
a tire pressure monitoring system (TPMS) that illuminates a low
tire pressure telltale
when one or more of your tire s is significantly under-inflated.
Accordingly, when the low tire pr essure telltale illuminates, you
should stop and check your tires as soon as possible, and inflate
them to the proper pressure.
Driving on a significantly under-in flated tire causes the tire to
overheat and can lead to tire failure. Under-inflat ion also reduces
fuel efficiency and tire tread li fe, and may affect the vehicle's
handling and stopping ability.
U.S. models

451
uuWhen Driving uTire Pressure Monitoring System (TPMS) - Required Federal Explanation
Driving
Please note that the TPMS is not a substitute for proper tire
maintenance, and it is the driver 's responsibility to maintain
correct tire pressure, even if un der-inflation has not reached the
level to trigger illumination of th e TPMS low tire pressure telltale.
Your vehicle has also been equi pped with a TPMS malfunction
indicator to indicate when the system is not operating properly.
The TPMS malfunction indicator is combined with the low tire
pressure telltale. When the syst em detects a malfunction, the
telltale will flash fo r approximately one minute and then remain
continuously illumina ted. This sequence will continue upon
subsequent vehicle start-ups as long as the malfunction exists.
When the malfunction indicator is illuminated, the system may
not be able to detect or signal low tire pressure as intended.
TPMS malfunctions may occur for a variety of reasons, including
the installation of replacement or alternate tires or wheels on the
vehicle that prevent the TPMS from functioning properly.
Always check the TPMS malfunction telltale after replacing one or
more tires or wheels on your vehicle to ensure that the
replacement or alternate tires and wheels allow the TPMS to
continue to function properly.

452
uuWhen Driving uBlind spot information System*
Driving
Blind spot information System*
Is designed to detect vehicles in specified alert zones adjacent to your vehicle,
particularly in harder to see areas commonly known as “blind spots.”
When the system detects vehi cles approaching from behind in adjacent lanes, the
appropriate indicator comes on for a few se conds, providing assistance when you
change lanes.
■How the system works
1 Blind spot information System*
Important Safety Reminder
Like all assistance systems, the blind spot information
system has limitations. Over reliance on the blind spot
information system may result in a collision.
The blind spot information system alert indicator may
not come on under the following conditions:
•A vehicle does not stay in the alert zone for more
than two seconds.
•A vehicle is parked in a side lane.•The speed difference betw een your vehicle and the
vehicle you are passing is greater than 6 mph (10
km/h).
•An object not detected by the radar sensors
approaches or passes your vehicle.
•A vehicle running in the adjacent lane is a
motorcycle or other small vehicle.
3WARNING
Failure to visually confirm that it is safe to
change lanes before doing so may result in
a crash and serious injury or death.
Do not rely only on the blind spot
information system wh en changing lanes.
Always look in your mi rrors, to either side
of your vehicle, and behind you for other
vehicles before changing lanes.
Alert zone range
A: Approx. 1.6 ft. (0.5 m)
B: Approx. 10 ft. (3 m)
C: Approx. 10 ft. (3 m) Radar Sensors:
underneath the
rear bumper
corners
Alert ZoneA
B
C
●Your vehicle speed is
between 20 mph (32 km/h)
and 100 mph (160 km/h).
●The transmission is in (D.
* Not available on all models

Continued453
uuWhen Driving uBlind spot information System*
Driving
■When the system detects a vehicle
Blind spot information System Alert Indicator:
Located on the outside rearview mirror on
both sides.
Comes on when:
•A vehicle enters the alert zone from behind
to overtake you with a speed difference of
no more than 31 mph (50 km/h) from your
vehicle.
• You pass a vehicle with a speed difference
of no more than 12 mph (20 km/h).
Blinks and a beeper sounds when:
You move the turn signal lever in the direction
of the detected vehicle. The beeper sounds
three times.1 Blind spot information System*
The system is for your convenience only. Even if an
object is within the alert zone, the following
situations may occur.
•The blind spot informatio n system alert indicator
may not come on due to obstruction (splashes,
etc.) even without the Blind Spot Information
System Not Available driver information
interface appearing.
•The blind spot informatio n system alert indicator
may come on even with the message appearing.
You can change the setting for the blind spot
information system. 2 Customized Features P. 352
The system does not operate when in
( R.
Turn the system off when towing a trailer.
The system may not work properly for the following
reasons:
•The added mass tilts the vehicle and changes the
radar coverage.
•The trailer itself can be detected by the radar
sensors, causing the blind spot information system
alert indicators to come on.
2.0 L engine models
Comes On
Blinks
* Not available on all models

uuWhen Driving uBlind spot information System*
454
Driving
■Blind spot information System On and Off
When you turn the blind spot information
system on and off, do the following.
1. Press the safety support switch.
2. Roll the left selector wheel to the
symbol and push it.
The blind spot information system is in the
previously selected ON or OFF setting each
time you start the engine.1 Blind spot information System*
The blind spot information system may be adversely
affected when:
•Objects (guard rails, poles, trees, etc,.) are
detected.
•An object that does not re flect radio waves well,
such as a motorcycle, is in the alert zone.
•Driving on a curved road.•A vehicle is moving from a far lane to the adjacent
lane.
•The system picks up external electrical interference.•The rear bumper or the sensors have been
improperly repaired or the rear bumper has been
deformed.
•The orientation of the sensors has been changed.
•In bad weather (Heavy rain, snow, and fog).
•Making a turn at an intersection.•Driving on a bumpy road.
•Making a short turn that slightly tilts the vehicle.
For a proper blind spot in formation system operation:
•Always keep the rear bumper corner area clean.
•Do not cover the rear bumper corner area with
labels or stickers of any kind.
•Take your vehicle to a dealer if you need the rear
bumper corner area or the radar sensors to be
repaired, or the re ar bumper corner area is strongly
impacted.
Left Selector Wheel
Safety Support Switch
* Not available on all models

455Continued
Driving
Honda Sensing®
Honda Sensing® is a driver support system which employs the use of three distinctly
different kinds of sensors: a radar sensor located at the lower part of the front
bumper, a front sensor camera mounted to the interior side of the windshield,
behind the rearview mirror, and the sonar sensors located in the front and rear
bumpers.
Honda Sensing ® is a driver support system which employs the use of two distinctly
different kinds of sensors: a radar sensor located at the lower part of the front
bumper and a front sensor camera mounted to the interior side of the windshield,
behind the rearview mirror.
Honda Sensing ® has following functions.
■The functions which do not requir e switch operations to activate
• Collision Mitigation Braking SystemTM (CMBSTM) 2 P. 458
• Low Speed Braking Control* 2 P. 467
• Road Departure Mitigation (RDM) System 2 P. 496
• Traffic Sign Recognition System 2 P. 500
■The functions wh ich require switch operations to activate
• Adaptive Cruise Control (ACC) with Low Speed Follow
2 P. 472
• Lane Keeping Assist System (LKAS) 2 P. 488
Models with Low Speed Braking Control
Models without Low Speed Braking Control
* Not available on all models

456
uuHonda Sensing ®u
Driving
■ Button
Press to activate standby mode for ACC with
Low Speed Follow. Or press to cancel the
system.
■LKAS Button
Press to activate standby mode for LKAS. Or
press to cancel the system.
■RES/+ and SET/- Buttons
Press RES/+ button to resume the ACC with
Low Speed Follow or increase the vehicle
speed.
Press SET/− button to set the ACC with Low
Speed Follow or decrease the vehicle speed.
■Interval Button
Press to change the ACC with Low Speed
Follow following-interval.
■CANCEL Button
Press to cancel ACC with Low Speed Follow.
■Operation Switches for the ACC with Low Speed Follow/
LKAS
button
Interval
Button
CANCEL
Button
LKAS Button
RES/+ Button
SET/- Button

457
uuHonda Sensing ®u
Driving
You can see the current state of ACC with
Low Speed Follow and LKAS.
aIndicates that ACC with Low Speed Follow
is ready to be activated.
• White: The system is standby.
• Green: The system is on.
• Amber: There is a problem with the system.
bIndicates that LKAS is ready to be activated.
• White: The system is standby.
• Green: The system is on.
• Amber: There is a problem with the system.
cIndicates that LKAS is activated and
whether or not traffic lane lines are
detected.
• Solid line: The system is on.
• Contour line: The system is in standby.
dIndicates whether or not ACC with Low
Speed Follow detects the vehicle ahead.
eShows vehicle set sp eed in ACC with Low
Speed Follow.
fShows set vehicle interval in ACC with Low
Speed Follow.
■Driver Information Interface Content1 Driver Information Interface Content
You can have the head-up display show you the
current state of each function.
2 Head-Up Display
* P. 159
Models with head-up display
6
* Not available on all models

458
uuHonda Sensing ®u Collision Mitigation Braking SystemTM (CMBSTM)
Driving
Collision Mitigati on Braking SystemTM (CMBSTM)
Can assist you when there is a possibility of your vehicle colliding with a vehicle or a
pedestrian detected in front of yours. The CMBSTM is designed to alert you when the
potential for a collision is determined, as well as to reduce your vehicle speed to help
minimize collision severity when a collision is deemed unavoidable.
■How the system works
1 Collision Mitigation Braking SystemTM (CMBSTM)
Important Safety Reminder
The CMBS
TM is designed to reduce the severity of an
unavoidable collision. It does not prevent collisions
nor stop the vehicle automati cally. It is still your
responsibility to operate th e brake pedal and steering
wheel appropriately acco rding to the driving
conditions.
The CMBS
TM may not activate or may not detect a
vehicle in front of y our vehicle under certain
conditions: 2 CMBS
TM Conditions and Limitations P. 462
For directions on the prop er handling of the radar
sensor, refer to the following page. 2 Radar Sensor P. 508
You can read about handling information for the
camera equipped with this system. 2 Front Sensor Camera P. 506
When the CMBS
TM activates, it may automatically
apply the brake. It will be canceled when your vehicle
stops or a potential collision is not determined.
The radar sensor is at the
lower part of the front
bumper.
The camera is located
behind the rearview
mirror.
The system starts monitoring the roadway ah ead when your vehicle speed is about
3 mph (5 km/h) and there is a vehicle in front of you.
When to use
The CMBSTM activates when:●The speed difference between your vehicle and a vehicle or pedestrian detected in
front of you becomes about 3 mph (5 km/h) and over with a chance of a collision.
●Your vehicle speed is about 62 mph (100 km/h) or less and the system determines
there is a chance of a collision with:
- Vehicles detected in front of you that ar e stationary, oncoming, or traveling in your
same direction.
- A pedestrian who is detected in front of you.
●Your vehicle speed is above 62 mph (100 km/h), and the system determines there
is a chance of a collision with a vehicle detected in front of you traveling in your
same direction.