2021 HONDA ACCORD SEDAN ECU

360
uuCustomized Features u
Features
*1:Default SettingSetup
Group Customizable Features Desc
ription Selectable Settings
System
LanguageChanges the display language.
English (United
States)*1/Español /
Français
Touch Panel
SensitivitySets the sensitivity of the touch panel screen.High /Normal*1
System
VolumesSystem VolumesChanges the system sounds volume.—
Reading/
WarningVerbal
ReminderTurns the verbal reminders on and off.ON*1/ OFF
Config. of
Instrument
Panel
Select configurationSelects whether the apps display comes on or not
on the driver information interface.Config.1*1/Config.2 /
Config.3
SecurityPasswordSet the value of password display.ON*1/ OFF
Unknown sources—ON /OFF*1

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uuCustomized Features u
Continued
Features
*1:Default SettingSetup
Group Customizable Features Description Selectable Settings
Vehicle Door/Window
Setup Auto Door Lock
Changes the setting for
the automatic locking
feature. OFF
/With Ve hicle
Speed
*1/ Shift From P
Key and Remote
Unlock Mode Sets up either the driver’s door or all doors to
unlock on the first push
of the remote or built-in
key. Driver Door Only
*1/
All Doors
Keyless Lock Answer
Back LOCK/UNLOCK- The exterior lights flash.
LOCK (2nd push)- The beeper sounds.
ON
*1/
OFF
Security Relock Timer Changes the time it takes for the doors to relock
and the security system to
set after you unlock the
vehicle without opening any door. 30sec
*1/
60sec /90sec
Auto Door Unlock Changes the setting for
when the doors unlock
automatically. OFF
/All Doors When
Driver’s Door
Opens
*1/ All Doors
When Shifted to
Park/ All Doors With
IGN OFF
Walk Away Auto
Lock
*Changes the settings for the auto lock function
when you walk away from the vehicle. ON
/OFF*1
Maintenance
Info. Select Reset Items
Resets the engine oil life display when you have
performed the maintenance service. —
* Not available on all models

372
Features
HomeLink® Universal Transceiver*
The HomeLink ® Universal Transceiver can be pr ogrammed to operate up to three
remote controlled devices around your home , such as garage doors, lighting, or
home security systems.
Refer to the safety information that came wi th your garage door opener to test that
the safety features are functioning properly. If you do not have the safety
information, contac t the manufacturer.
Before programming HomeLink, make sure th at people and objects are out of the
way of the garage or gate to prevent potential injury or damage.
When programming a garage door opener, park just outside the garage door’s path.
■Important Safety Precautions
1HomeLink ® Universal Transceiver*
Before programming HomeLi nk to operate a garage
door opener, confirm that the opener has an external
entrapment protection system , such as an “electronic
eye,” or other safety and reverse stop features. If it
does not, HomeLink may not be able to operate it.
* Not available on all models

404
Driving
Before Driving
Driving Preparation
Check the following items before you start driving.
• Make sure there are no obstructions on the windows, door mirrors, exterior
lights, or other parts of the vehicle.
u Remove any frost, snow, or ice.
u Remove any snow on the roof, as this can slip down and obstruct your field of
vision while driving. If frozen solid , remove ice once it has softened.
u When removing ice from around the wheels, be sure not to damage the wheel
or wheel components.
• Make sure the hood is securely closed.
u If the hood opens while driving, your front view will be blocked.
• Make sure the tires are in good condition.
u Check air pressure, and check for damage and excessive wear.
2 Checking and Maintaining Tires P. 577
•Make sure there are no people or ob jects behind or around the vehicle.
u There are blind spots from the inside.
■Exterior Checks1Exterior Checks
NOTICE
When doors are frozen s hut, use warm water around
the door edges to melt any ice. Do not try to force
them open, as this can damage the rubber trim
around the doors. When done, wipe dry to avoid
further freezing.
Do not pour warm water into the key cylinder.
You will be unable to insert the key if the water
freezes in the hole.
Heat from the engine and exhaust can ignite
flammable material s left under the hood, causing a
fire. If you’ve parked y our vehicle for an extended
period, inspect and remove any debris that may have
collected, such as dried grass and leaves that have
fallen or have been carried in for use as a nest by a
small animal. Also check under the hood for leftover
flammable materials after you or someone else has
performed maintenance on your vehicle.

Continued405
uuBefore Driving uDriving Preparation
Driving
• Store or secure all items on board properly.
u Carrying too much cargo, or improperly storing it, can affect your vehicle’s
handling, stability, sto pping distance, and tires, and make it unsafe.
2Maximum Load Limit P. 407
•Do not pile items higher than the seat height.
u They can block your view and may be thrown forward in the event of sudden
braking.
• Do not place anything in the front seat footwells. Make sure to secure the floor
mat.
u An object or unsecured floor mat can in terfere with your brake and accelerator
pedal operation while driving.
• If you have any animals on board, do not let them move around in the vehicle.
u They may interfere with driving and a crash could occur.
• Securely close and lock all doors and the trunk.
2 Locking/Unlocking the Doors from the Inside P. 177
•Adjust your seating position properly.
u Adjust the head restraint, too.
2Seats P. 212
2 Adjusting the Front and Rear Outer* Head Restraint Positions P. 219
•Adjust the mirrors and steering wheel properly.
u Adjust them while sitting in the proper driving position.
2 Mirrors P. 210
2 Adjusting the Steering Wheel P. 209
■Interior Checks1Interior Checks
The headlight aim is set by the factory, and does not
need to be adjusted. Howeve r, if you regularly carry
heavy items in the tr unk or tow a trailer
*, have the
aiming readjusted at a de aler or by a qualified
technician.
* Not available on all models

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uuTowing a Trailer uDriving Safely with a Trailer
Driving
Driving Safely with a Trailer
• Have the trailer properly serviced and keep it in good condition.
• Make sure that all the weights and load in the vehicle and trailer are within limits.
2Towing Load Limits P. 409
•Securely attach the hitch, safety chains, and other necessary parts to the trailer.
• Securely store all the items in and on the tr ailer so that they do not shift while
driving.
• Check if the lights and brakes on the trailer are working properly.
• Check the pressure of the traile r tires, including the spare.
• Turn off the Low Speed Braking Control syst em. It may activate if it detects the
vehicle being towed as an obstacle.
2 System On and Off P. 469
•Turn off the rear parking sensor system.
2 Turning off All Rear Sensors P. 526
•Drive slower than normal.
• Obey posted speed limits for vehicles with trailers.
• Use the
(D position when towing a trailer on level roads.
• Turn more slowly and with a wider turning arc than normal.
• Allow more time and distance for braking.
• Do not brake or turn suddenly.
■Things You Need To Know Before Towing a Trailer
■Towing Speeds and Gears
■Turning and Braking
2.0 L engine models
1Driving Safely with a Trailer
Operating speed when towing a trailer must not
exceed 62 mph (100 km/h).
Parking
In addition to the normal precautions, place wheel
chocks at each of the trailer’s tires.
Models with Low Speed Braking Control
1Towing Speeds and Gears
When towing a fixed-sided trailer (e.g., camper), do
not exceed 55 mph (88 km/h). At higher speeds, the
trailer may sway or af fect vehicle handling.

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uuWhen Driving uStarting the Engine
Driving
■To stop the engine1Remote Engine Start*
The engine may not start by the remote engine start
if:
•You have disabled a remo te engine start setting
using the audio/information screen.
•The power mode is not in VEHICLE OFF.
•The transmission is in a position other than ( P.
•The hood is open, or any door or the trunk is
unlocked.
•You have already used the remote twice to start
the engine.
•The battery charge is too low.
•Another registered remo te is in the vehicle.
•There is any antenna failure.•The door is unlocked with the built-in key.
•The engine oil pressure is low.
•The engine coolant temper ature is extremely high.•The telematics unit* malfunctions.
•The security system alarm is not set.Press and hold the
button for one second.
Go within the range,
and try again.
The exterior lights flash once if the engine stops successfully.
The exterior lights will not flash when the remote is out of
the smart entry system range.
The engine will not stop.
* Not available on all models

uuWhen Driving uStarting the Engine
418
Driving
1Remote Engine Start*
The engine may stop whil e it is running if:•You do not start the vehicl e within 10 minutes of
starting the engine with the remote.
•The engine is stopped by using the remote.•The security system alarm is activated.•The door is unlocked with the built-in key.•The hood is open.•The engine coolant temper ature is extremely high.•The battery is low.•The engine oil pressure is low.•The malfunction indicator la mp comes on if there is
a problem with the emissions control systems.
•You press the ENGINE START/STOP button
without depressing the brake pedal.
•The transmission is in a position other than ( P.
•You press the shift lever release button.
While the engine is running, the vehicle will
automatically preconditi on inside the vehicle.
When it is warm outside:
•The climate control system is activated in auto
mode.
When it is cold outside:
•The defroster is activated at a moderately warm
temperature.
•The rear defogger and door mirror heaters are
activated.
•The seat heaters* and heated steering wheel* are
activated. 2 Heated Steering Wheel
* P. 236
2 Front Seat Heaters* P. 237
2 Front Seat Heaters and Seat Ventilation*
P. 238
Automatic transmission models
Continuously variable transmission models
* Not available on all models