2021 HONDA ACCORD SEDAN battery

551
uuMaintenance Under the Hood uMaintenance Items Under the Hood
Maintenance
2.0 L engine models
Engine Oil Dipstick
(Orange)
Washer Fluid
(Blue Cap) Engine Coolant
Reserve Tank
Radiator Cap Brake Fluid
(Black Cap)
Engine Oil Fill Cap
Battery

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

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uuBattery uCharging the Battery
Maintenance
Charging the Battery
Disconnect both battery cables to prevent damaging your vehicle’s electrical system.
Always disconnect the negative (–) cable first, and reconnect it last.1Charging the Battery
When replacing the battery, the replacement must be
of the same specifications.
Consult a dealer for more information.
The Vehicle Stability Assist
TM (VSA ®) system, Vehicle
Stability AssistTM (VSA ®) OFF, adaptive cruise control
(ACC) with Low Speed Follow, safety support and
low tire pressure/TPMS indicators may come on in
amber along with a message in the driver information
interface when you set the power mode to ON after
reconnecting the battery.
Drive a short distance at more than 12 mph (20 km/h).
Each indicator should go off. If any do not, have your
vehicle checked by a dealer.
The battery installed in this vehicle is specifically
designed for a model wi th Auto Idle Stop.
Using a battery other than this specified type may
shorten the battery life, a nd prevent Auto Idle Stop
from activating. If you need to replace the battery,
make sure to select the specified type and size. Ask a
dealer for more details.
Models with Auto Idle Stop

588
Maintenance
Remote Transmitter Care
Replacing the Button Battery
If the indicator does not come on when the button is pressed, replace the battery.
1.Remove the built-in key.
2. Remove the upper half of the cover by
carefully prying on the edge with a coin.
u Wrap a coin with a cloth to prevent
scratching the remote.
u Remove carefully to avoid losing the
buttons.
3. Make sure to replace the battery with the
correct polarity.1 Replacing the Button Battery
NOTICE
An improperly disposed of battery can damage the
environment. Always conf irm local regulations for
battery disposal.
Replacement batteries are commercially available or
at a dealer.
3WARNING
CHEMICAL BURN HAZARD
The battery that powers the remote can
cause severe internal burns and can even
lead to death if swallowed.
Keep new and used batteries away from
children.
If you suspect that a child has swallowed
the battery, seek medical attention
immediately.
Battery type: CR2032
Battery

Continued593
uuCleaning uExterior Care
Maintenance
A good coat of automotive body wax helps protect your vehicle’s paint from the
elements. Wax will wear off over time and expose your vehicle’s paint to the
elements, so reapply as necessary.
If you get gasoline, oil, engine coolant, or battery fluid on resi n coated parts, they
may be stained or the coating may peel. Prom ptly wipe it away using a soft cloth and
clean water.
Wipe using a glass cleaner.
Aluminum is susceptible to deterioration caused by salt and other road
contaminants. When necessary, as early as possible use a sponge and mild detergent
to wipe away these contaminants. Do no t use a stiff brush or harsh chemicals
(including some commercial wheel cleaners). These can damage the protective finish
on aluminum alloy wheels, resulting in corrosion. Depending on the type of finish,
the wheels also may lo se their luster or appear burn ished. To avoid water stains,
wipe the wheels dry with a cloth while they are still wet.
■Applying Wax
■Maintaining the Bumpers and Other Resin Coated Parts
■Cleaning the Window
■Maintaining Aluminum Wheels
1 Applying Wax
NOTICE
Chemical solvents and st rong cleaners can damage
the paint, metal, and plasti c on your vehicle. Wipe
away spills immediately.
1 Maintaining the Bumpers an d Other Resin Coated Parts
Ask a dealer about the corr ect coating material when
you want to repair the painted surface of the parts
made of resin.

596
uuAccessories and Modifications uModifications
Maintenance
Modifications
Do not modify your vehicle in a manner that may affect its handling, stability, or
reliability, or install non-genuine Honda parts or accessories that may have a similar
effect.
Even minor modifications to vehicle system s can affect overall vehicle performance.
Always make sure all equipment is prop erly installed and maintained, and do not
make any modification to your vehicle or its systems that might cause your vehicle
to no longer meet federal, state, province, territory, and local regulations.
The on-board diagnostic port (OBD-II/SAE J1962 connector) installed on this vehicle
is intended to be used with automobile system diagnostic devices or with other
devices that Honda has approved. Use of any other type of device may adversely
affect the vehicle’s electronic systems or allow them to be compromised, possibly
resulting in a system malfunction, draine d battery, or other unexpected problems.
Do not modify or attempt to repair any of the electrical components.

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