2021 HONDA ACCORD SEDAN battery

169
uuLocking and Unlocking the Doors uLow Remote Signal Strength
Controls
Low Remote Signal Strength
The vehicle transmits radio waves to locate the remote when locking/unlocking* the
doors, and fuel fill door, opening* the trunk, or to start the engine.
In the following cases, locking/unlocking
* the doors, and fuel fill door, opening* the
trunk, or to start the engine may be inhibited or operation may be unstable:
• Strong radio waves are being transmitted by nearby equipment.
• You are carrying the remote together with telecommunications equipment,
laptop computers, cell phones, or wireless devices.
• A metallic object is touching or covering the remote.
1Low Remote Signal Strength
Communication between the remote and the vehicle
consumes the remote’s battery.
Battery life is about two years, but this varies
depending on re gularity of use.
The battery is consumed whenever the remote is
receiving strong radio waves. Avoid placing it near
electrical appliances such as televisions and personal
computers.
* Not available on all models

uuLocking and Unlocking the Doors uLocking/Unlocking the Doors from the Outside
174
Controls
■Locking the doors
Press the lock button.
Once: u Some exterior lights flash, all the doors
and fuel fill door lock, and the security
system sets.
Twice (within five seco nds after the first
push): u Some exterior lights flash, the beeper
sounds and verifies the security system is
set.
■Unlocking the doors
Press the unlock button.
Once: u Some exterior lights flash twice, and the
driver’s door and fuel fill door unlocks.
Twice: u Some exterior lights flash twice, and the
remaining doors unlock.
■Using the Remote Transmitter1Using the Remote Transmitter
If you do not open a door within 30 seconds of
unlocking the vehicle with the remote transmitter,
the doors will automatically relock.
You can change the relock timer setting. 2 Customized Features P. 352
You can lock or unlock doors using the remote
transmitter only when the power mode is in VEHICLE
OFF.
The remote transmitter us es low-power signals, so
the operating range may vary depending on the
surroundings.
The remote transmitter will not lock the vehicle when
a door is open.
If the distance at which the remote transmitter works
varies, the batter y is probably low.
If the LED does not come on when you press a
button, the battery is dead. 2 Replacing the Button Battery P. 588
You can customize the door unlock mode setting. 2 Customized Features P. 352
LED
Unlock Button Lock Button

184
Controls
Security System
Immobilizer System
This system prevents a key that has not been pre-registered from starting the
engine.
Pay attention to the follo wing when pressing the ENGINE START/STOP button:
• Do not allow objects that emit strong radio waves near the ENGINE START/
STOP button.
• Make sure the key is not covered by or touching a metal object.
• Do not bring a key from another vehi cle’s immobilizer system near the ENGINE
START/STOP button.
Do not put the key near magnetic items. El ectronic device, such as televisions and
audio systems emit strong magnetic fields . Note that even a key chain can become
magnetic.1 Immobilizer System
NOTICE
Leaving the key in the vehicl e can result in theft or
accidental movement of the vehicle.
Always take the key with you whenever you leave the
vehicle unattended.
Do not alter the system or add other devices to it.
Doing so may damage the system and make your
vehicle inoperable.
Apply and hold the brake pedal before turning the
vehicle on the first time after the battery has been
disconnected.
Canadian models

185
uuSecurity System uSecurity System Alarm
Continued
Controls
Security System Alarm
The security system alarm activates when the trunk, hood or doors are forcibly
opened. The alarm does not activate if the trunk or doors are opened with the key,
remote transmitter, or smart entry system
*.
However, the alarm activates if a door is opened with the key and then the
transmission is taken out of
(P (continuously variable transmission models) or the
hood is opened before the power mode is in ON.
■When the security system alarm activates
The horn sounds intermittently, and some exterior lights flash.
■To deactivate the security system alarm
Unlock the vehicle using the key, remo te transmitter or smart entry system*, or set
the power mode to ON. The system, along with the horn and flashing lights, is
deactivated.
■Setting the security system alarm
The security system alarm automatically sets when the following conditions have
been met:
• The power mode is set to VEHICLE OFF (LOCK).
• The hood is closed.
• All doors and trunk are locked from outsid e with the key, remote transmitter, or
smart entry system
*.
■When the security system alarm sets
The security system alarm in dicator in the instrument panel blinks and the blinking
interval changes after about 15 seconds.
■To cancel the security system alarm
The security system alarm is canceled wh en the vehicle is unlocked using the key,
remote transmitter or smart entry system
*, or when the power mode is set to ON. The
security system alarm indicato r goes off at the same time.
1Security System Alarm
Do not alter the system or add other devices to it.
Doing so may damage the system and make your
vehicle inoperable.
The security system alarm continues for a maximum
of two minutes until the security system alarm
deactivates.
Do not set the security system alarm when someone
is in the vehicle or a window is open. The system can
accidentally activate when:
•Unlocking the door with the lock tab.
•Opening the trunk with the trunk opener or the
emergency trunk opener.
•Opening the hood with the hood release.
•Taking the transmission out of ( P.
If the battery goes dead after you have set the
security system alarm, the security alarm may go off
once the battery is re charged or replaced.
If this occurs, deactivate the security system alarm by
unlocking a door using the ke y, remote transmitter,
or smart entry system
*.
Continuously variable transmission models
* Not available on all models

191Continued
Controls
Operating the Switches Around the Steering Wheel
ENGINE START/STOP Button
*1 : Continuously variable transmission models for Canadian models
*2 : U.S. models
■Changing the Power Mode1ENGINE START/STOP Button
ENGINE START/STOP Button Operating Range
You can start the engine wh en the remote is inside
the vehicle.
If the battery of the remote is getting low, the engine
may not start when you push the ENGINE START/
STOP button. If the engine do es not start, refer to
the following link. 2 If the Remote Battery is Weak P. 606
The engine may also run if the remote is close to the
door or window, even if it is outside the vehicle.
ON mode:
The ENGINE START/STOP button is red when the
engine is running.
Operating Range
Continuously Variable Transmission Automatic Transmission
VEHICLE OFF (LOCK)
The button is off.
The steering wheel is locked
*1.
The power to all electrical
components is turned off.
Press the button without the
transmission in
( P.
Put the transmission into
( P
then press the button. Press the button.
Without pressing
the brake pedal
Without pressing
the brake pedal ACCESSORY
The button blinks (in red).
Operate the audio system and
other accessories in this position.
ON
The button blinks (in red).
All electrical components can be
used.
Put the transmission into (P*2.
*2

uuOperating the Switches Around the Steering Wheel uENGINE START/STOP Button
192
Controls
If you leave the vehicle for 30 to 60 minutes with the transmission in (P and the
power mode in ACCESSORY, the vehicle auto matically goes into the mode similar to
VEHICLE OFF (LOCK) to avoid draining the battery.
When in this mode:
The steering wheel does not lock.
You cannot lock or unlock doors with th e remote transmitter or the smart entry
system.
Press the ENGINE START/STOP button twice to switch the mode to VEHICLE OFF
(LOCK).
If you open the driver’s door when the power mode is set to ACCESSORY, a warning
buzzer sounds.
■Automatic Power Off
■Power Mode Reminder
1 Changing the Power Mode
If the power mode does not change from VEHICLE
OFF to ACCESSORY, press the ENGINE START/STOP
button while moving the st eering wheel left and
right. The steering wheel will unlock, allowing the
mode to change.
Do not leave the power mode in ACCESSORY or ON
when you get out.
Continuously variable transmission models
for Canadian models
Continuously variable transmission models
for Canadian models

195
uuOperating the Switches Around the Steering Wheel uLight Switches
Continued
Controls
Light Switches
Rotating the light switch turns the lights on
and off, regardless of the power mode
setting.
■High beams
Push the lever forward until you hear a click.
■Low beams
When in high beams, pull the lever back to
return to low beams.
■Flashing the high beams
Pull the lever back, and release it.
■Lights off
Turn the lever to OFF either when:
• The transmission is in
(P.
• The parking brake is applied.
To turn the light s on again, turn the lever to
OFF to cancel the lights off mode. Even if you
do not cancel the lights off mode, the lights
come on automatically when:
• The transmission is taken out of
(P and the
parking brake is released.
• The vehicle starts to move.
■Manual Operation1Light Switches
If you leave the power mode in VEHICLE OFF while
the lights are on, a chime sounds when the driver’s
door is opened.
When the lights are on, the lights on indicator in the
instrument pane l will be on.
2 Lights On Indicator P. 97
Do not leave the lights on when the engine is off
because it will cause the battery to discharge.
If you sense that the le vel of the headlights is
abnormal, have the vehicl e inspected by a dealer.
High Beams
Flashing the high beams
Low Beams
Turns on parking, side marker,
tail, and rear license plate lights
Turns on headlights, parking, side
marker, tail, and rear license plate
lights
U.S. models
High Beams
Flashing the high beams
Low Beams
Turns on parking, side marker,
tail, and rear license plate lights
Turns on headlights, parking, side
marker, tail, and rear license plate
lights
Canadian modelsCanadian models

204
uuOperating the Switches Around the Steering Wheel uRear Defogger/Heated Door Mirror* Button
Controls
Rear Defogger/Heated Door Mirror* Button
Press the rear defogger and heated door mirror button to defog the rear window
and mirrors when the power mode is in ON.
The rear defogger and heated door mirror
automatically switch off after 10-30 minutes
depending on the outside temperature.
However, if the outside temperature is 32°F
(0°C) or below, it does not automatically
switch off.
Heated Windshield Button
Press the heated windshield button to deice
the windshield at the wiper park area and
along the driver side edge of the windshield
when the power mode is in ON.
The heated windshield will automatically
switch off after 15 minutes.
1Rear Defogger/Heated Door Mirror* Button
This system consumes a lot of power, so turn it off
when the window has been defogged. Also, do not
use the system for a long ti me while the engine is
idling. This may weaken the battery, making it
difficult to start the engine.
When the power mode is se t to ON and the outside
temperature is below 41°F (5°C), the heated door
mirror may automatically activate for 10 minutes.
Models with heated door mirror
Canadian models
1 Heated Windshield Button
This system consumes a lot of power, so turn it off
when the window has been deiced. Also, do not use
the system for a long peri od when the engine is
idling. This may weaken the battery, making it
difficult to start the engine.
* Not available on all models