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

Contents
Child Safety P. 64Exhaust Gas Hazard P. 78Safety Labels P. 79
Opening and Closing the Trunk P. 181 Security System P. 184 Windows P. 187
Operating the Switches Around the Steering Wheel P. 191 Mirrors P. 210
Interior Convenience Items P. 223 Climate Control System P. 240
Audio Error Messages P. 328General Information on the Audio System P. 330
Bluetooth ® HandsFreeLink ® P. 375 Refuel Recommend P. 401
When Driving P. 414 Honda Sensing ® P. 455 Braking P. 510 Parki ng Your Vehicle P. 520
Fuel Economy and CO
2 Emissions P. 536 Turbo Engine Vehicle P. 537
Maintenance Under the Hood P. 550 Replacing Light Bulbs P. 566
Checking and Maintaining Tires P. 577 Battery P. 586 Remote Transmitter Care P. 588
Cleaning P. 590 Accessories and Modifications P. 595
Engine Does Not Start P. 605 If the Battery Is Dead P. 608 Shift Lever Does Not Move P. 611
Fuses P. 622 Emergency Towing P. 628 If You Cannot Unlock the Fuel Fill Door P. 629
Refueling P. 632
Devices that Emit Radio Waves P. 639 Reporting Safety Defects P. 640
Authorized Manuals P. 646 Customer Service Information P. 647
Quick Reference GuideP. 6
Safe DrivingP. 33
Instrument PanelP. 81
ControlsP. 165
FeaturesP. 245
DrivingP. 403
MaintenanceP. 539
Handling the UnexpectedP. 597
InformationP. 633
IndexP. 648

Quick Reference Guide
29
Handling the Unexpected (P 597)
Flat Tire (P 599)
●Park in a safe location and replace the
flat tire with the compact spare tire in the
trunk.
Indicators Come On
(P 615)
●Identify the indicator and consult the
owner’s manual.
Engine Won’t Start
(P 605)
●If the battery is dead, jump start using a
booster battery.
Blown Fuse (P 622)
●Check for a blown fuse if an electrical
device does not operate.
Overheating (P 613)
●Park in a safe location. If you do not see
steam under the hood, open the hood,
and let the engine cool down.
Emergency Towing
(P 628)
●Call a professional towing service if you
need to tow your vehicle.

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

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

249
uuAudio System uAudio System Theft Protection
Features
Audio System Theft Protection
The audio system is disabled when it is disconnected from the power source, such as
when the battery is disconnected or goes dead. In certain conditions, the system
may display a code entry screen. If this occurs, reactivate the audio system.
■Reactivating the audio system
1. Set the power mode to ON.
2. Turn on the audio system.
3. Press and hold the audio system power knob for more than two seconds.
u The audio system is reac tivated when the audio co ntrol unit establishes a
connection with the vehicl e control unit. If the control unit fails to recognize
the audio unit, you must go to a dealer and have the audio unit checked.

510
Driving
Braking
Brake System
Use the parking brake to keep the vehicle stationary when parked. When the
parking brake is applied, you can ma nually or automatically release it.
■To apply
The electric parking brake can be applied any
time the vehicle has battery, no matter which
position the power mode is in.
Pull the electric parking brake switch up gently
and securely. u The indicator in the switch comes on.
u The parking brake and brake system
indicator (red) comes on.
■To release
The power mode must be in ON in order to
release the electric parking brake.
1. Depress the brake pedal.
2. Press the electric parking brake switch.
u The indicator in the switch goes off.
u The parking brake and brake system
indicator (red) goes off.
Manually releasing the parking brake using
the switch helps your ve hicle start slowly and
smoothly when facing down hill on steep hills.
■Parking Brake1 Braking
When you depress the brak e pedal, you may hear a
whirring sound from the engine compartment. This is
because the brake system is in operation, and it is
normal.
1 Parking Brake
You may hear the electric parking brake system
motor operating from the re ar wheel area when you
apply or release the parking brake. This is normal.
The brake pedal may slightly move due to the electric
parking brake system opera tion when you apply or
release the parking br ake. This is normal.
You cannot apply or release the parking brake if the
battery goes dead. 2 If the Battery Is Dead P. 608
If you pull up and hold the electric parking brake
switch while driving, the brakes on all four
wheels are applied by the VSA ® system until the
vehicle comes to a stop. The electric parking
brake then applies, and the switch should be
released.
Electric Parking Brake Switch
Electric Parking Brake Switch

586
Maintenance
Battery
Checking the Battery
The condition of the battery is monitored by a
sensor located on the negative terminal of the
battery. If there is a problem with this sensor,
the driver information interface will display a
warning message. If this happens, have your
vehicle inspected by a dealer.
Check the battery te rminals for corrosion
monthly.
If your vehicle’s battery is disconnected or goes dead:
• The audio system is disabled.
2 Reactivating the audio system P. 249
•The clock resets.
2 Clock P. 166
•The immobilizer system needs to be reset.
2 Immobilizer System Indicator P. 98
1Battery
WARNING: Battery post, terminals,
and related accessories contain lead
and lead compounds.
Wash your hands after handling.
When you find corrosion, cl ean the battery terminals
by applying a baking powder and water solution.
Clean the terminals with a damp towel. Cloth/towel
dry the battery. Coat the terminals with grease to
help prevent future corrosion.
3WARNING
The battery gives off explosive hydrogen
gas during normal operation.
A spark or flame can cause the battery to
explode with enough force to kill or
seriously hurt you.
When conducting any battery
maintenance, wear prot ective clothing and
a face shield, or have a skilled technician do
it.
Models without navigation system
Canadian models

597
Handling the Unexpected
This chapter explains how to handle unexpected troubles.
ToolsTypes of Tools .................................. 598
If a Tire Goes Flat
Changing a Flat Tire ......................... 599
Engine Does Not Start Checking the Engine ........................ 605
If the Remote Battery is Weak .......... 606
Emergency Engine Stop ................... 607
If the Battery Is Dead ....................... 608
Shift Lever Does Not Move .............. 611
Overheating How to Handle Overheating ............. 613 Indicator, Coming On/Blinking
If the Low Oil Pressure Warning Appears ... 615If the Charging System Indicator Comes
On ................................................. 615
If the Malfunction Indicator Lamp Comes On or Blinks ................................... 616
If the Brake System Indicator (Red) Comes
On or Blinks ................................... 617
If the Brake System Indicator (Red) Comes On
or Blinks at the Same Time When the Brake
System Indicator (Amber) Comes On.... 618
If the Electric Power Steering (EPS) System Indicator Comes On ....................... 619 If the Low Tire Pressure/TPMS Indicator
Comes On or Blinks ....................... 620
If the Transmission System Indicator Blinks along with the Warning Message... 621
Fuses Fuse Locations ................................. 622
Inspecting and Changing Fuses ........ 627
Emergency Towing ........................... 628
If You Cannot Unlock the Fuel Fill Door....629
If You Cannot Open the Trunk ........... 630
Refueling ........................................... 632

605
Handling the Unexpected
Engine Does Not Start
Checking the Engine
If the engine does not start, check the starter.
Starter conditionChecklist
Starter doesn’t turn or turns
over slowly.
The battery may be dead. Check
each of the items on the right and
respond accordingly.Check for a message on the driver information interface.●If the To Start, Hold Remote Near Start Button message appears2 If the Remote Battery is Weak P. 606
uMake sure the remote is in its operating range.2 ENGINE START/STOP Button Operating Range P. 191
Check brightness of the interior lights.
Turn on the interior lights and check the brightness.
●If the interior lights are dim or do not come on at all2Battery P. 586●If the interior lights come on normally2 Inspecting and Changing Fuses P. 627
The starter turns over normally
but the engine doesn’t start.
There may be a problem with a
fuse. Check each of the items on
the right and respond accordingly. Review the engine start procedure.
Follow its instructions, and try
to start the engine again.
2 Starting the Engine P. 414
Check the immobilize r system indicator.
When the immobilizer system indicator is blinking, the engine cannot be started.
2 Immobilizer System P. 184
Check the fuel level.
There should be enough fuel in the tank.
2 Fuel Gauge P. 139
Check the fuses.
Check all fuses, or have the vehicle checked by a dealer.
2 Inspecting and Changing Fuses P. 627
If the problem continues:2Emergency Towing P. 628
1Checking the Engine
If you must start the vehi cle immediately, use an
assisting vehicle or booster battery to jump start it.
2 If the Battery Is Dead P. 608

608
Handling the Unexpected
If the Battery Is Dead
Jump Starting Procedure
Turn off the power to electric devices, such as audio and lights. Turn off the engine,
then open the hood. 1.Open the cover on the positive + terminal.
2. Connect the first jump er cable to your
vehicle’s battery + terminal.
3. Connect the other end of the first jumper
cable to the booster battery + terminal.
u Use a 12-volt booster battery only.
u When using an automotive battery
charger to boost your 12-volt battery,
select a lower charging voltage than
15-volt. Check the charger manual for
the proper setting.
4. Connect the second jumper cable to the
booster battery - terminal.1If the Battery Is Dead
Securely attach the jumper cables clips so that they
do not come off when the e ngine vibrates. Also be
careful not to tangle the ju mper cables or allow the
cable ends to touch each other while attaching or
detaching the jumper cables.
3WARNING
A battery can explode if you do not follow
the correct procedure, seriously injuring
anyone nearby.
Keep all sparks, open flames, and smoking
materials away from the battery.
Booster Battery
1.5 L engine models
2.0 L engine models
Booster Battery