
35
Quick Reference Guide
Maintenance (P 473)
Under the Hood (P 482)
● Check engine oil, coolants and windshield washer fluid. Add 
when necessary.
● Check brake fluid.
● Check the 12-volt battery condition monthly.
aPull the hood release handle under the corner of the 
dashboard.
bLocate the hood latch lever,  push it to the side, and then 
raise the hood. Once you have raised the hood slightly, you 
can release the lever.
cWhen finished, close the hood  and make sure it is firmly 
locked in place.
Lights (P 496)
● Inspect all lights regularly.
Wiper Blades (P 498)
● Replace blades if they leave streaks 
across the windshield.
Tires (P 501)
● Inspect tires and  wheels regularly.
● Check tire pressures regularly.
● Install snow tires for winter driving.
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82
Safe Driving
Exhaust Gas Hazard
Carbon Monoxide Gas
The engine exhaust from this vehicle contains carbon monoxide, a colorless, 
odorless, and highly toxic gas. As long as you properly maintain your vehicle, carbon 
monoxide gas will not get into the interior.
■Have the exhaust system in spected for leaks whenever
• The exhaust system is m aking an unusual noise.
• The exhaust system may have been damaged.
• The vehicle is raised for an oil change.
When you operate a vehicle with the trunk  open, airflow can pull exhaust gas into 
the interior and create a hazardous condition.  If you must drive with the trunk open, 
open all the windows and  set the climate control system as shown below.
1. Select the fresh air mode.
2. Select the   mode.
3. Set the fan speed to high.
4. Set the temperature control to a comfortable setting.
Adjust the climate control system in the  same manner if you sit in your parked 
vehicle with the engine running.
1 Carbon Monoxide Gas
An enclosed area such as a garage can quickly fill up 
with carbon monoxide gas.
Do not run the engine with the garage door closed. 
Even when the garage door is open, drive out of the 
garage immediately afte r starting the engine.
3WARNING
Carbon monoxide gas is toxic.
Breathing it can cause unconsciousness and 
even kill you.
Avoid any enclosed areas or activities that 
expose you to carbon monoxide.
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104
uuIndicators uDriver Information Interface Wa rning and Information Messages
Instrument Panel
MessageConditionExplanation
●Appears when there is a problem with the sensor on 
the 12-volt battery.●Have your vehicle checked by an authorized Honda 
Clarity Plug-In Hybrid dealer.
2 Checking the 12-Volt Battery  P. 510
●Appears along with the battery charging system 
indicator when the battery is not charging.●Turn off the climate control system and rear defogger to 
reduce electricity consumption.
2If the 12-Volt Battery Charging System Indicator 
Comes On  P. 548
●Appears when the engine  oil pressure is low.●Appears while driving - Immediately stop in a safe 
place.
2If the Low Oil Pressure Warning Appears  P. 547
●Appears when the engine coolant temperature gets 
abnormally high.
2Overheating  P. 544
●Appears when the engine coolant temperature is 
near its upper limit.●Drive slowly to prevent overheating.
●Appears if there is a pr oblem with the cooling 
system.●Drive slowly to prevent ov erheating and have your 
vehicle checked by an author ized Honda Clarity Plug-In 
Hybrid dealer as soon as possible.
●Appears when the fuel fill cap is loose or is not 
installed.
2 Tighten Fuel Cap Message  P. 549
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450
Driving
Parking Your Vehicle
When Stopped
1.Depress the brake pedal firmly.
2. With the brake pedal depressed, pull up th e electric parking brake switch slowly, 
but fully.
3. Change the gear position to 
(P.
4. Turn off the power system.
u The parking brake and brake system indicator (red) goes off in about 15 
seconds.
1Parking Your Vehicle
Do not park your vehicle  near flammable objects, 
such as dry grass, oil, or timber.
Heat from the exhaust can cause a fire.
3WARNING
The vehicle can roll aw ay if left unattended 
without confirming that Park is engaged.
A vehicle that rolls away could cause a crash 
resulting in serious injury or death.
Always keep your foot on the brake pedal 
until you have confirmed that 
( P is shown 
on the gear position indicator.
1 When Stopped
NOTICE
The following can damage the driveline:
•Depressing the accelera tor and brake pedals 
simultaneously.
•Holding the vehicle in place when facing uphill by 
depressing the accelerator pedal.
•Changing into ( P before the vehicle stops 
completely.
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457
Driving
Charging
Before Charging
Check the following items before you start charging your vehicle.
• Make sure to use a dedicated and properly  grounded circuit, that is rated for at 
least 15 amps.
u Have an electrician inspect the outlet  you are using to see if it meets these 
criteria.
• Make sure you plug the charging cable direct ly into the wall outlet dedicated to 
vehicle charging.
u Do not use extension cord s, adaptors, or multi-outlet plugs between the 
charging cable and the outlet.
• Make sure the charging cable is fully uncoiled before use.
• Make sure the control box,  charging connector, and charging cable are free from 
any damage, including cracks or frays.
u If you find any damage to the devices, contact an authorized Honda Clarity 
Plug-In Hybrid dealer.
• Make sure the charging conn ector and inlet are clean.
u If you find any contamination or foreign object in the connector or inlet, 
contact an authorized Honda Cl arity Plug-In Hybrid dealer.
• Make sure the charging cable is dry.
u Check that there is no water in the i mmediate area, and that your hands are 
dry.
Note: Outlet needs to be in good shape.  Worn or damaged outlet will not make 
good contact with the plug. Ensure that the plug is fully inserted and does not come 
out of the outlet after installation. A loose  connection will cause excessive heat build 
up within the plug and damage it.
■Safety Checklist
1 Charging
3WARNING
Using a 120 volt wall outlet that is rated less 
than 15 amps or one that is powering other 
devices can cause a fire, seriously injuring 
you or others.
When using the 120 volt charger, use a 
dedicated and properly grounded circuit 
rated 15 amps or more. Consult an 
electrician if yo u are not sure.
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Continued459
uuCharging uCharge the High Voltage battery using a Level 1 or 2 charger
Driving
1. Put the transmission into (P and set the 
power mode to OFF.
2. Press and hold the lid open button on the 
remote transmitter, or press and hold the 
charge lid release button on the dashboard.
u The lid opens.
u The illumination lamp inside the charge 
lid comes on for a few minutes.
3. Open the trunk, and remove the bag.
4. Open the bag, and take the charging cable 
out.
u Do not tie or coil the cable when in use.
■How to Charge (Level 1)1Charging
3WARNING
Charging the High Vo ltage battery under 
the following conditions is a potential 
source of electric shock and fire, which can 
result in serious injury or death:
• Charging the battery during an electric 
storm.
• Using the charging cable near water or 
handling with wet hands.
• Using a charger, whose case is broken or 
cracked or whose cable is frayed or 
damaged.
Never charge the vehi cle in any of the 
above situations.
3WARNING
Using a charger that is damaged or 
modified can cause electrical shock and 
fire, which can result in serious injury or 
death.
Never disassemble or modify the charger. If 
the charger becomes damaged, stop using 
it and consult an authorized Honda Clarity 
Plug-In Hybrid dealer.
Charge Lid 
Release 
Button
Charging Cable Bag
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472
Driving
Fuel Economy and CO2 Emissions
Improving Fuel Economy and Reducing CO2 
Emissions
Achieving fuel economy and reducing CO2 emissions is dependent on several 
factors, including driving conditions, load weight, idling time, driving habits, and 
vehicle condition. Depending on these and other factors, you may not achieve the 
rated fuel economy of this vehicle.
You can optimize your fuel economy with  proper maintenance of your vehicle. 
Always maintain your vehicle in accordance with the messages displayed on the 
driver information interface.
• Use the recommended viscosity engine oil.
2 Recommended Engine Oil P. 484
•Maintain the specified tire pressure.
• Do not load the vehicl e with excess cargo.
• Keep your vehicle clean. A buildup of snow or mud on your vehicle's underside 
adds weight and increases wind resistance.
■Maintenance and Fuel Economy
1Improving Fuel Economy and Reducing CO2 Emissions
Direct calculation is  the recommended method to 
determine actual fuel consumed while driving.
In Canada, posted fuel  economy numbers are 
established following a simulated test. For more 
information on how this test  is performed, please visit 
http://oee.nrcan.gc.ca/
Miles driven Gallons of 
fuel Miles per 
Gallon
100 Liters of 
fuel Kilometers 
driven L per 100 km
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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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