
83
Safe Driving
Safety Labels
Label Locations
These labels are in the locations shown. They warn you of potential hazards that  can cause serious injury or death. Read these labels 
carefully.
If a label comes off or becomes hard to read (except for the U. S. dashboard label which may be removed by the owner), contact a n 
authorized Honda Clarity Plug-In  Hybrid dealer for a replacement.
Dashboard
Air Conditioner System U.S. models
Canadian models
Radiator Cap
U.S. models only
Charging Lid
U.S. models Canadian models
PCU U.S. models Canadian models
High Voltage Battery System 
Coolant Reserve Tank Cap
Sun Visor
U.S. models Canadian modelsMotor Coolant 
Reserve Tank Cap
Actuator Lid
U.S. models Canadian models
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uuLocking and Unlocking the Doors uLow Smart Entry Remote Signal Strength
138
Controls
Contains a number that you will need if you 
purchase a replacement key.
Low Smart Entry Remo te Signal Strength
The vehicle transmits radio waves to loca te the smart entry remote when locking/
unlocking the doors, opening the trunk,  or to activate the power system.
In the following cases, locking/unlocking the doors, opening the trunk, or activating 
the power system may be inhibited or operation may be unstable:
• Strong radio waves are being tra nsmitted by nearby equipment.
• You are carrying the smart entry remote together with telecommunications 
equipment, laptop computers, ce ll phones, or wireless devices.
• A metallic object is touching or  covering the smart entry remote.
■Key Number Tag1Key Number Tag
Keep the key number tag separate from the key in a 
safe place outside  of your vehicle.
If you wish to purchase an additional key, contact an 
authorized Honda Clarity  Plug-In Hybrid dealer.
If you lose your key an d you cannot activate the 
power system, contact an  authorized Honda Clarity 
Plug-In Hybrid dealer.
1 Low Smart Entry Remote Signal Strength
Communication between the smart entry remote and 
the vehicle consumes the smart entry remote’s 
battery.
Battery life is  about two years,  but this varies 
depending on regularity of use.
The battery is consumed whenever the smart entry 
remote is receivi ng strong radio wave s. Avoid placing 
it near electrical  appliances such as  televisions and 
personal computers.
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473
Maintenance
This chapter discusses basic maintenance.
Before Performing MaintenanceInspection and Maintenance ............ 474
Safety When Performing Maintenance...475Parts and Fluids Used in Maintenance Service ........................................... 476
Maintenance Minder
TM..................... 477
Maintenance Under the Hood Maintenance Items Under the Hood .. 482
Opening the Hood ........................... 483
Recommended Engine Oil ................ 484
Oil Check ......................................... 485
Adding Engine Oil ............................ 486
Changing the Engine Oil and Oil Filter ...487 Engine Coolant ................................ 490
Cooling System ................................ 492
Transmission Fluid ............................ 494
Brake Fluid ....................................... 494
Refilling Window Washer Fluid......... 495
Replacing Light Bulbs ....................... 496Checking and Maintaining Wiper 
Blades .......................................... 498
Checking and Maintaining Tires
Checking Tires ................................. 501
Tire and Loading Information Label .. 502
Tire Labeling .................................... 502
DOT Tire Quality Grading (U.S. Vehicles).. 504
Wear Indicators ............................... 506
Tire Service Life ................................ 506
Tire and Wheel Replacement ........... 507
Tire Rotation .................................... 508
Winter Tires ..................................... 509
12-Volt Battery ................................. 510
Remote Transmitter Care Replacing the Button Battery ........... 512
Climate Control System Maintenance.. 513CleaningInterior Care .................................... 515
Exterior Care.................................... 517
Accessories and Modifications ........ 521
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490
uuMaintenance Under the Hood uEngine Coolant
Maintenance
Engine Coolant
This coolant is premixed with 50% antifreeze and 50% water. Do not add any 
straight antifreeze or water.
We recommend you check the engine coolan t level every time you refuel or you 
charge the High Voltage battery. Check the re serve tank first. If it is completely 
empty, also check the coolant level in  the radiator. Add the engine coolant 
accordingly.
1. Make sure the engine and radiator are cool.
2. Check the amount of coolant in the reserve 
tank.
u If the coolant level is below the  MIN 
mark, add the specified coolant until it 
reaches the  MAX mark.
3. Inspect the cooling  system for leaks.
Specified coolant: Honda Long  Life Antifreeze/Coolant Type 2
■Reserve Tank
1Engine Coolant
NOTICE
Genuine Honda engine coolan t is a 50/50 mixture of 
antifreeze and water that can withstand freezing at 
temperatures as low as about −31°F (−35°C). If your 
vehicle is consistently subjected to temperatures 
below this, the concentration of antifreeze in the 
coolant should be  increased. Consult an authorized 
Honda Clarity Plug-In Hybrid dealer for details.
If Honda antifreeze /coolant is not available, you may 
use another major brand of  non-silicate coolant as a 
temporary replacement. Check that it is a high quality 
coolant recommended for  aluminum engines. 
Continued use of any non-Honda coolant can result 
in corrosion, causing the cooling system to 
malfunction or fail. Have the cooling system flushed 
and refilled with Honda anti freeze/coolant as soon as 
possible.
Do not add rust inhibitors or other additives to your 
vehicle’s cooling system. They may not be compatible 
with the coolant or with the engine components.
Reserve 
Tank
MAX
MIN
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511
uu12-Volt Battery uCharging the 12-Volt Battery
Maintenance
Charging the 12-Volt Battery
Disconnect both battery cables to prevent damaging your vehicle’s electrical system. 
Always disconnect the negative (–) cable first, and reconnect it last.112-Volt Battery
When replacing the battery,  the replacement must be 
of the same specifications.
Consult an authorized Honda Clarity Plug-In Hybrid 
dealer for more information.
The indicators for the Vehicle Stability Assist ® (VSA ®) 
system, VSA ® OFF, Collision Mitigation Braking 
System
TM (CMBSTM), and low tire pressure/Tire 
Pressure Monitoring System (TPMS) may come on 
along with a message in the driver information 
interface when you turn the power system on after 
reconnecting the battery.
Drive a short distance at 12 mph (20 km/h). The 
indicator should go off. If  it does not, have your 
vehicle checked by an aut horized Honda Clarity Plug-
In Hybrid dealer.
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512
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 Remove carefully to avoid losing the 
buttons.
u Wrap a coin with a cloth to prevent 
scratching the smart entry remote.
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 an authorized Honda Clar ity Plug-In Hybrid dealer.
3WARNING
CHEMICAL BURN HAZARD
The battery that powers the remote 
transmitter 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
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575
uuWarranty Coverages u
Continued
Information
Accessory Limited Warranty – Honda accessories are covered under this 
warranty. Time and mileage limits depend  on the type of accessory and other 
factors. Please read your warranty booklet for details.
Replacement Parts Limited Warranty –  covers all Honda replacement parts 
against defects in materials and workmanship.
Replacement 12-Volt Battery Limited Warranty –  provides prorated coverage 
for a replacement battery purchased from an authorized Honda Clarity Plug-In 
Hybrid dealer.
Replacement Muffler Lifeti me Limited Warranty – provides coverage for as 
long as the purchaser of the muffler owns the vehicle.
Tire Warranty –  the original tires are warranted by their manufacturer. Your Honda 
automobile dealer will be glad to assist you in contac ting the tire’s manufacturer, if 
needed. Please read your  warranty booklet for details.
Restrictions and exclusions apply to all these warranties. Please read the Honda 
warranty information booklet th at came with your vehicle for precise information on 
warranty coverages. Your vehicle’s original  tires are covered by their manufacturer. 
Tire warranty information  is in a separate booklet.
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581
Index
B
Battery......................................................  469
12-Volt ...................................................  510
12-Volt Battery  Charging System 
Indicator .........................................  90, 548
Charging (12-Volt Battery) ......................  511
Charging (High Voltage Battery)..............  457
High Voltage...........................................  469
Jump Starting .........................................  541
Maintenance (Checking the 12-Volt  Battery) .................................................  510
Maintenance (Replacing) .........................  512
Belts (Seat) ..................................................  47
Beverage Holders .....................................  187
Bluetooth ® Audio .....................................  267
Bluetooth ® HandsFreeLink ®....................  337
Booster Seats (For Children) ......................  81
Brake System ............................................  434
Anti-lock Brake System (ABS) ..................  440
Automatic Brake Hold .............................  438
Brake Assist System.................................  441
Fluid .......................................................  494
Foot Brake ..............................................  436
Indicator (Amber) ..............................  88, 552
Indicator (Red) ....................  86, 87, 550, 552
Parking Brake..........................................  434
Brake System (Amber) Indicator ...........................................  88, 552
Brake System (Red) Indicator .............................  86, 87, 550, 552 Bulb Replacement
....................................  496
Front Turn Signal and  Front Side Marker 
Lights ....................................................  496
Headlights ...............................................  496
High-Mount Brake Light ..........................  497
Parking/Daytime Running Lights ..............  496
Rear License Plate Lights ..........................  497
Taillights and Back-Up Lights ...................  497
Taillights/Rear Side  Marker, Brake and 
Rear Turn Signal Lights ..........................  497
Bulb Specifications ...................................  568
C
Carbon Monoxide Gas ................................  82
Carrying Cargo ..................................  373, 375
Certification Label ....................................  570
Changing Bulbs .........................................  496
Charge Lid .........................................  460, 463
Charge Lid Release Button ...............  459, 462
Charge Timer Setting ...............................  470
Charging (High Voltage Battery) .............  457
120V AC (AC Level 1) ..............................  459
240V AC (AC Level 2) ..............................  462
Cannot Start Charging ............................  466
Charge Indicator (vehicle side) .................  468
Charge Lid .......................................  460, 463
Charging Cable Bag ................................  459
Charging Connector ........................  460, 463
Control Box .............................................  464
High Voltage Battery ...............................  469 Timer ......................................................  470
Charging Cable Bag .................................  459
Charging Connector .........................  460, 463
Charging System Indicator .................  90, 548
Child Safety .................................................  69
Childproof Door Locks.............................  148
Child Seat ....................................................  69
Booster Seats ............................................  81
Child Seat for Infants.................................  71
Child Seat for Small Children .....................  72
Installing a Child Seat  with a Lap/Shoulder 
Seat Belt ..................................................  76
Larger Children .........................................  80
Rear-facing Child Seat ...............................  71
Selecting a Child Seat ................................  73
Using a Tether ...........................................  78
Childproof Door Locks .............................  148
Cleaning the Exterior ...............................  517
Cleaning the Interior ................................  515
Climate Control System ............................  193
Changing the Mode ................................  195
Defrosting the Windshield and 
Windows ...............................................  197
Dust and Pollen Filter...............................  514
Sensors ...................................................  201
Using Automatic Climate Control ............  193
Clock ..........................................................  136
CMBS
TM (Collision Mitigation Braking 
SystemTM) .................................................  442
Coat Hook .................................................  190
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