
37
Quick Reference Guide
Maintenance (P 449)
Under the Hood (P 457)
● Check inverter coolant 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 463)
● Inspect all lights regularly.
Wiper Blades (P 465)
● Replace blades if they leave streaks 
across the windshield.
Tires (P 468)
● Inspect tires and  wheels regularly.
● Check tire pressures regularly.
● Install snow tires for winter driving.
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86
Instrument Panel
Indicators
IndicatorNameOn/BlinkingExplanationMessage
Parking Brake 
and Brake 
System Indicator 
(Red)
●Comes on for a few seconds when 
you set the power mode to ON, 
then goes off if the parking brake 
has been released.
●Comes on when the parking brake 
is applied, and goes off when it is 
released.
●Comes on when the brake fluid 
level is low.
●Comes on if there is a problem 
with the brake system.
●The beeper sounds and the 
indicator comes on if you drive 
with the parking brake not fully 
released.
●Comes on while driving - Make sure 
the parking brake is released. Check the 
brake fluid level.
2 What to do when the indicator 
comes on while driving P. 514
●Comes on along with the parking 
brake and brake system indicator 
(amber)  - Immediately stop in a safe 
place. Contact an  authorized Honda 
Clarity Fuel Cell dealer for repair. The 
brake pedal becomes harder to operate. 
Depress the pedal further than you 
normally do.
●Comes on along with the ABS 
indicator  - Have your vehicle checked by 
an authorized Honda Clarity Fuel Cell 
dealer.
2 If the Brake System Indicator (Red) 
Comes On or Blinks P. 514
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uuWhen Driving uTransmission
374
Driving
If there is a strong impact with something  under the vehicle, stop in a safe location. 
Check the underside of the vehicle for da mage or any fluid leaks, and contact an 
authorized Hond a Clarity Fuel Cell dealer.
Transmission
As with a conventional gasoline-powered  vehicle with an automatic transmission, 
this vehicle will creep.
Keep the brake pedal firmly  depressed when stopped.
■Other Precautions
■Creeping
1Precautions While Driving
Do not press the 
(N button, as you will lose 
regenerative braking (and ac celeration) performance.
Avoid hard braking for the  first 200 miles (300 km).
You should also follow this  when the brake pads are 
replaced.
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449
Maintenance
This chapter discusses basic maintenance.
Before Performing MaintenanceInspection and Maintenance ............ 450
Safety When Performing Maintenance...451
Parts and Fluids Used in Maintenance Service ........................................... 452
Maintenance Minder
TM..................... 453
Maintenance Under the Hood Maintenance Items Under the Hood .. 457
Opening the Hood ........................... 458
Inverter Coolant ............................... 459
Transmission Fluid ............................ 461
Brake Fluid ....................................... 461 Refilling Window Wa
sher Fluid......... 462
Replacing Light Bulbs ....................... 463
Checking and Maintaining Wiper 
Blades .......................................... 465
Checking and Maintaining Tires
Checking Tires ................................. 468
Tire and Loading Information Label .. 469
Tire Labeling .................................... 469
DOT Tire Quality Grading (U.S. Vehicles).. 471
Wear Indicators................................ 473
Tire Service Life ................................ 473
Tire and Wheel Replacement............ 474 Tire Rotation .................................... 475
Winter Tires ..................................... 476
12-Volt Battery ................................. 477
Remote Transmitter Care Replacing the Button Battery ........... 479
Climate Control System Maintenance.. 480
CleaningInterior Care .................................... 481
Exterior Care.................................... 483
Accessories and Modifications ........ 487
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450
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  any 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 tri ps, when washing the vehicle, or when 
refueling.
■Periodic inspections
• Check the brake fluid level monthly.
2 Brake Fluid  P. 461
•Check the tire pressure monthly. Examin e the tread for wear and foreign objects.
2Checking and Maintaining Tires  P. 468
•Check the operation of the exterior lights monthly.
2 Replacing Light Bulbs  P. 463
•Check the condition of the wiper bl ades at least every six months.
2Checking and Maintaining Wiper Blades P. 465
■Types of Inspection and Maintenance
1Inspection and Maintenance
Maintenance, replacement, or repair of 
emissions control devices and systems may be 
done by any automotive repair establishment or 
individuals using parts that are “certified” to 
EPA standards.
According to state and fede ral regulations, failure to 
perform maintenance on the maintenance main 
items marked with # will  not void your emissions 
warranties. However, all ma intenance services should 
be performed in accordan ce with the intervals 
indicated by the driver  information interface.
2 Maintenance Service Items  P. 455
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. 537
If you want to perform ma intenance yourself, make 
sure that you have the necessary tools and skills first.
After performing ma intenance, update the records in 
the separate maintenance booklet.
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455
uuMaintenance MinderTMuTo Use Maintenance MinderTM
Continued
Maintenance
■Maintenance Service Items1Maintenance Service Items
•At each maintenance interval, check Fuel Cell 
Insulating Fluid level and  top up (to “Max” fill line) 
with “Fuel Cell Insulati ng Fluid - 20% prediluted 
formulation”
•Replace hydrogen ventil ation duct and drain, 
hydrogen tank every  15 years without the 
maintenance minder.
Maintenance Minder Message
System Message 
Indicator
Maintenance Item Code(s)
CODEMaintenance Items
A
●Replace ion exchange filter
0●Inspect front and rear brakes●Check expiry date for Temporary Tire Repair Kit●Inspect these items: • Tie rod ends, steering gear box, and boots
• Suspension components
• Driveshaft boots
• Brake hoses and lines (including ABS/VSA)
• All fluid levels and condition of fluids
• Stay RR, RR Subframe
• Exhaust Diluter
1
●Rotate tires
2●Replace dust and pollen filter*1
3●Replace transmission fluid*2
5●Replace Fuel Cell Insulating Fluid - 50% prediluted 
formulation*3
*1: If you drive primarily in urban areas that have high concentrations of soot in the air from industry and  from diesel-powered vehicles, replace the dust and pollen filter every 15,000 miles.
*2: Driving in mountainous areas at very low vehicle speeds results in higher transmission temperatures.  This requires transmission fluid changes more frequently than recommended by the Maintenance 
Minder. If you regularly drive your vehicle under these conditions, have the transmission fluid changed 
every 31,250 miles.
*3: If a Maintenance Minder message does not appear more than 12 year after the display for item 5 is  reset, change Fuel Cell Insulating Fluid with “Fuel Cell Insulating Fluid - 50% prediluted formulation” 
every 12 years.
*4: If a Maintenance Minder message does not appear more than 3 years after the display for item 7 is  reset, change the brake fluid and replace air cleaner element every 3 years.
CODEMaintenance Items
7
●Replace brake fluid*4
●Replace air cleaner element*4
9●Inspect these items: • Hydrogen tank
• Hydrogen ventilation duct and drain
• Exhaust system
• Fuel lines and connections
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457
Maintenance
Maintenance Under the Hood
Maintenance Items Under the Hood
Washer Fluid 
(Black Cap)
12-Volt BatteryBrake Fluid 
(Black Cap)
Inverter Coolant 
Expansion Tank 
Cap
Inverter Coolant 
Reserve Tank
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461
uuMaintenance Under the Hood uTransmission Fluid
Maintenance
Transmission Fluid
Have an authorized Honda Clarity Fuel Cell  dealer check the fluid level and replace 
if necessary.
Do not attempt to check or change  the transmission fluid yourself.
Brake Fluid
The fluid level should be between the  MIN 
and  MAX  marks on the side of the reserve 
tank.
■Transmission Fluid
Specified fluid: Honda ATF DW-1 (automatic transmission fluid)
Specified fluid: Honda He avy Duty Brake Fluid DOT 3
■Checking the Brake Fluid
1Transmission Fluid
NOTICE
Do not mix Honda ATF DW-1 with other 
transmission fluids.
Using a transmission flui d other than Honda ATF 
DW-1 may adversely af fect the operation and 
durability of your vehicle’ s transmission, and damage 
the transmission.
Any damage caused by usi ng a transmission fluid that 
is not equivalent to Honda ATF DW-1 is not covered 
by Honda’s new vehicle limited warranty.
1 Brake Fluid
NOTICE
Brake fluid marked DOT 5 is  not compatible with your 
vehicle’s braking system  and can cause extensive 
damage.
If the specified brake fluid is not available, you should 
use only DOT 3 or DOT 4 fluid from a sealed 
container as a temporary replacement.
Using any non-Honda brake fluid can cause corrosion 
and decrease the longevity of the system. Have the 
brake system flushed and re filled with Honda Heavy 
Duty Brake Fluid DOT 3 as soon as possible.
If the brake fluid level is at or below the MIN  mark, 
have an authorized Honda Clarity Fuel Cell dealer 
inspect the vehicle for leaks or worn brake pads as 
soon as possible.
Brake Reserve Tank
MAX
MIN
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