Page 449 of 555

447
Driving
Refueling
Fuel Information
The hydrogen fuel receptacle is located on the passenger’s rear side of the vehicle.
■Fuel requirement
■Hydrogen supply pressure: 70 MPa (10,153 psig) (at 59°F [15°C])
■Hydrogen filling amount*1: Approximately 11 lbs (5 kg) (at 70 MPa [10,153
psig])
*1: A measured value when refueled at a hydrogen station with 70 MPa (10,153
psig) of supply pressure compliant with the SAE (J2601) fueling protocol.
■Hydrogen tanks capacity: 37.3 US gal (141.3 L) (at 70 MPa [10,153 psig])
■Hydrogen filling station
To completely fill the hydrogen tank, you ne ed to use a hydrogen filling station that
has an H70 dispenser, which is capable of supplying pressures of up to 10,153 psig
(70 MPa).
Refueling the vehicle is only possible if the pressure inside the hydrogen tank of the
vehicle does not exceed the supply pressure of the filling station.
If you use an H35 dispenser, you will be able to fill only half of the tank.
Compressed hydrogen gas
1 Refueling
NOTICE
If improper hydrogen gas is us ed, the FC stack will be
damaged. Always refuel at authorized hydrogen
filling stations.
2 Refer to the Navigation System Manual
Hydrogen gas is colorless, odorless, very light and
flammable. Also, its burni ng flame is difficult to
detect by sight.
3WARNING
When refueling hydrogen gas, keep
sources of fire, such as a lit cigarette, away
from the vehicle. As hydrogen gas is highly
flammable, it may caus e a fire or explosion.
Be sure to turn the po wer system to OFF to
stop the FC stack operation.
21 CLARITY FCV CSS-31TRT6400_02.book 447 ページ 2020年9月25日 金曜日 午 後3時15分
Page 450 of 555

448
uuRefueling uHow to Refuel
Driving
How to Refuel
1. Stop the vehicle with the hydrogen station
dispenser on the left side of the vehicle.
2. Change the gear position to
(P.
3. Set the power mode to OFF.
4. Press the hydrogen fuel lid release button
on the driver’s door to open the hydrogen
fuel lid.
5. Remove the dust cap from the hydrogen
fuel receptacle inside the hydrogen fuel lid.
6. Make sure to put the dust cap back on the
receptacle to prevent contamination.
2 How to Close the Dust Cap and the
Fuel Lid P. 449
1How to Refuel
The hydrogen fuel lid ope ns only when the power
mode is in OFF and the gear position is in
( P.
2 If You Cannot Unlock the Hydrogen Fuel
Lid P. 529
3WARNING
Hydrogen is flammable and explosive.
You can be burned or seriously injured.
• Stop the motor, a nd keep sparks and
flames away.
• Refuel only outdoors.
3WARNING
When refueling, touch something metal of
the vehicle, etc. to discharge static-buildup
from your body before opening the fuel lid.
Refueler must be a person who has
discharged static elec tricity from his/her
body.
If you re-enter the vehicle while refueling,
your body may become recharged; you
have to discharge the static-buildup from
your body again.
Hydrogen Fuel Lid
Release Button
Press
Hydrogen
Fueling NozzleHydrogen Fuel
Receptacle
Dust Cap
21 CLARITY FCV CSS-31TRT6400_02.book 448 ページ 2020年9月25日 金曜日 午 後3時15分
Page 451 of 555
449
uuRefueling uHow to Refuel
Driving
1. Put the dust cap back on th e hydrogen fuel receptacle.
2. Shut the hydrogen fuel lid by hand.
■How to Close the Dust Cap and the Fuel Lid1How to Refuel
NOTICE
Do not touch the hydrogen fu el receptacle other than
when refueling. Touching it carelessly may cause
damage.
The filling amount may depend on ambient
temperature.
It is normal to hear a whooshing sound during
refueling.
1 How to Close the Dust Cap and the Fuel Lid
If the hydrogen fuel lid is left open, the gear position
cannot be shifted from
( P, and Close Hydrogen
Fuel Lid message appears on th e driver information
interface.
2 Driver Information Interface Warning and
Information Messages P. 104
21 CLARITY FCV CSS-31TRT6400_02.book 449 ページ 2020年9月25日 金曜日 午 後3時15分
Page 452 of 555

450
Driving
Fuel Economy
Improving Fuel Economy
Achieving fuel economy is dependent on several factors, including driving
conditions, load weight, standby 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.
• 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
Direct calculation is the recommended method to
determine actual fuel consumed while driving.
Miles driven Kilogram
of fuel Miles per
Kilogram
Kilogram of fuel Kilometers per
Kilogram
Kilometers
driven
21 CLARITY FCV CSS-31TRT6400_02.book 450 ページ 2020年9月25日 金曜日 午 後3時15分
Page 453 of 555

451
Maintenance
This chapter discusses basic maintenance.
Before Performing MaintenanceInspection and Maintenance ............ 452
Safety When Performing Maintenance ..453
Parts and Fluids Used in Maintenance Service ........................................... 454
Maintenance Minder
TM..................... 455
Maintenance Under the Hood Maintenance Items Under the Hood .. 459
Opening the Hood ........................... 460
Inverter Coolant ............................... 461
Transmission Fluid ............................ 463
Brake Fluid ....................................... 463 Refilling Window Washer Fluid......... 464
Replacing Light Bulbs ....................... 465
Checking and Maintaining Wiper
Blades .......................................... 467
Checking and Maintaining Tires
Checking Tires ................................. 470
Tire and Loading Information Label .. 471
Tire Labeling .................................... 471
DOT Tire Quality Grading (U.S. Vehicles).. 473
Wear Indicators................................ 475
Tire Service Life ................................ 475
Tire and Wheel Replacement............ 476 Tire Rotation .................................... 477
Winter Tires ..................................... 478
12-Volt Battery ................................. 479
Remote Transmitter Care Replacing the Button Battery ........... 481
Climate Control System Maintenance.. 482
CleaningInterior Care .................................... 483
Exterior Care.................................... 485
Accessories and Modifications ........ 489
21 CLARITY FCV CSS-31TRT6400_02.book 451 ページ 2020年9月25日 金曜日 午 後3時15分
Page 454 of 555

452
Maintenance
Before Performing Maintenance
Inspection and Maintenance
For your safety, perform all listed inspections and maintenance to keep your vehicle
in good condition. If you become aware of an y abnormality (noise, smell, insufficient
brake fluid, oil residue on the ground, etc .), have your vehicle inspected by an
authorized Honda Clar ity Fuel Cell dealer. (Note, however, that service at an
authorized Honda Clarity Fuel Cell dealer is not mandatory to keep your warranties
in effect.)
■Daily inspections
Perform inspections before long distance trips, when washing the vehicle, or when
refueling.
■Periodic inspections
• Check the brake fluid level monthly.
2 Brake Fluid P. 463
•Check the tire pressure monthly. Examin e the tread for wear and foreign objects.
2Checking and Maintaining Tires P. 470
•Check the operation of the exterior lights monthly.
2 Replacing Light Bulbs P. 465
•Check the condition of the wiper bl ades at least every six months.
2Checking and Maintaining Wiper Blades P. 467
■Types of Inspection and Maintenance
1Inspection and Maintenance
All maintenance services should be performed in
accordance with the intervals indicated by the driver
information interface. 2 Maintenance Service Items P. 457
If you want to perform complex maintenance tasks
that require more skills a nd tools, you can purchase a
subscription to the Service Express website at
www.techinfo.honda.com .
2 Authorized Manuals P. 540
If you want to perform ma intenance yourself, make
sure that you have the necessary tools and skills first.
After performing maintenanc e, update the records in
the separate maintenance booklet.
21 CLARITY FCV CSS-31TRT6400_02.book 452 ページ 2020年9月25日 金曜日 午 後3時15分
Page 455 of 555

453
uuBefore Performing Maintenance uSafety When Performing Maintenance
Maintenance
Safety When Performing Maintenance
Some of the most important safe ty precautions are given here.
However, we cannot warn you of every conceivable hazard that can arise in
performing maintenance. Only you can decide whether you should perform a given
task.
• To reduce the possibility of fire or explos ion, keep cigarettes, sparks, and flames
away from the 12-volt battery, all High Volt age system, and all fuel related parts.
• Never leave rags, towels, or other flammable objects under the hood.
u Heat from the motor or the surrounding parts can ignite them, causing a fire.
• To clean parts, use a co mmercially available degreaser or parts cleaner, not
gasoline.
• Wear eye protection and pr otective clothing when working with the 12-volt
battery or compressed air.
• The vehicle must be in a stationary condition.
u Make sure your vehicle is parked on le vel ground, the parking brake is set, and
the power system is turned off.
• Be aware that hot parts can burn you.
u Make sure to let the power system cool thoroughly before touching vehicle
parts.
• Be aware that moving parts can injure you.
u Do not activate the power system unless instructed to do so.
Keep your hands and limbs away from moving parts.
■Maintenance Safety
■Vehicle Safety
1Safety When Performing Maintenance
3WARNING
Improperly maintaining this vehicle or
failing to correct a pr oblem before driving
can cause a crash in which you can be
seriously hurt or killed.
Always follow the inspection and
maintenance recommendations according
to the schedules in this manual.
3WARNING
Failure to properly follow maintenance
instructions and prec autions can cause you
to be seriously hurt or killed.
Always follow the procedures and
precautions in this manual.
21 CLARITY FCV CSS-31TRT6400_02.book 453 ページ 2020年9月25日 金曜日 午 後3時15分
Page 456 of 555
454
uuBefore Performing Maintenance uParts and Fluids Used in Maintenance Service
Maintenance
Parts and Fluids Used in Maintenance Service
The use of Honda genuine parts and fluids is recommended when maintaining and
servicing your vehicle. Honda genuine parts are manufactured according to the
same high quality standards used in Honda vehicles.
21 CLARITY FCV CSS-31TRT6400_02.book 454 ページ 2020年9月25日 金曜日 午 後3時15分