Page 462 of 559

460
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, fluid residue on the ground, etc. ), have your vehicle inspected by an 
authorized Honda Clarity Electric dealer. (Note,  however, that service at an 
authorized Honda Clarity Elec tric dealer is not mandatory to keep your warranties in 
effect.)
■Daily inspections
Perform inspections before long distance  trips, when washing the vehicle, or when 
charging.
■Periodic inspections
• Check the brake fluid level monthly.
2 Brake Fluid  P. 470
•Check the tire pressure monthly. Examin e the tread for wear and foreign objects.
2Checking and Maintaining Tires  P. 477
•Check the operation of the exterior lights monthly.
2 Replacing Light Bulbs  P. 472
•Check the condition of the wiper bl ades at least every six months.
2Checking and Maintaining Wiper Blades P. 474
■Types of Inspection and Maintenance
1Inspection and Maintenance
At this time, maintenance  involving the high-voltage 
system should only be perf ormed at an authorized 
Honda Clarity Electric dealer.
All maintenance services  should be performed in 
accordance with the intervals indicated by the driver 
information interface. 2 Maintenance Service Items  P. 465
If you want to perform ba sic maintenance yourself, 
make sure that you have th e necessary tools and skills 
first.
After performing ma intenance, update the records in 
the separate maintenance booklet.
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        Page 479 of 559

477
Maintenance
Checking and Maintaining Tires
Checking Tires
To safely operate your vehicle, your tires must be of the proper type and size, in 
good condition with adequate  tread, and properly inflated.
■Inflation guidelines
Properly inflated tires provid e the best combination of hand ling, tread life, and comfort. 
Refer to the driver’s doorjamb label or spec ifications page for the specified pressure.
Underinflated tires wear unevenly, advers ely affect handling and energy economy, 
and are more likely to fail from overheating.
Overinflated tires make your vehicle ride ha rshly, are more prone to road hazards, 
and wear unevenly.
Every day before you drive, look at each of  the tires. If one looks lower than the 
others, check the pressure with a tire gauge.
At least once a month or before long trips , use a gauge to measure the pressure in 
all tires. Even tires in good condition can lose 1–2 psi (10–20 kPa, 0.1–0.2 kgf/cm
2) 
per month.
■Inspection guidelines
Every time you check inflation, also  examine the tires and valve stems.
Look for:
• Bumps or bulges on the side or in the tr ead. Replace the tire if you find any cuts, 
splits, or cracks in the side of the tire . Replace it if you see fabric or cord.
• Remove any foreign objects  and inspect for air leaks.
• Uneven tread wear. Have an authorized  Honda Clarity Electric dealer check the 
wheel alignment.
• Excessive tread wear.
2 Wear Indicators  P. 482
•Cracks or other damage around valve stem.
1Checking Tires
Measure the air pressure when tires are cold. This 
means the vehicle has been parked for at least three 
hours, or driven less than 1 mile (1.6 km). If 
necessary, add or releas e air until the specified 
pressure is reached.
If checked when hot, tire pressure can be as much as 
4–6 psi (30–40 kPa, 0.3–0.4 kgf/cm
2) higher than if 
checked when cold.
Whenever tire pressure is adjusted, you must 
calibrate the TPMS. 2 TPMS Calibration P. 416
Have an authorized Honda  Clarity Electric dealer 
check the tires if you feel a consistent vibration while 
driving. New tire s and any that have been removed 
and reinstalled  should be properly balanced.
3WARNING
Using tires that are excessively worn or 
improperly inflated can cause a crash in 
which you can be seriously hurt or killed.
Follow all instruction s in this owner’s 
manual regarding tire inflation and 
maintenance.
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478
uuChecking and Maintaining Tires uTire and Loading Information Label
Maintenance
Tire and Loading Information Label
The label attached to the driver’s doorj amb provides necessary tire and loading 
information.
Tire Labeling
The tires that came on your vehicle have a 
number of markings. Those you should be 
aware of are described as shown.
Whenever tires are replaced, they should be replaced with tires of the same size.
1 Tire and Loading Information Label
The tire and loading informat ion label attached to the 
driver’s doorjamb contains:
aThe number of people your vehicle can carry.bThe total weight your vehicle can carry. Do not 
exceed this weight.
cThe original tire sizes for front, rear, and spare, if 
equipped.
dThe proper cold tire pre ssure for front, rear, and 
spare, if equipped.
Label 
Example
Example Tire Size
Tire 
Identification 
Number (TIN)
Maximum 
Tire Load
Maximum 
Tire Pressure
Tire Size
■Tire Sizes
1 Tire Sizes
Following is an example  of tire size with an 
explanation of what  each component means.
235/45R18 94V
235: Tire width in millimeters.
45: Aspect ratio (the tire’s section height as a 
percentage of its width).
R: Tire construction code (R indicates radial).
18: Rim diameter in inches.
94: Load index (a numerical  code associated with the 
maximum load the tire can carry).
V: Speed symbol (an alphab etical code indicating the 
maximum speed rating).
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479
uuChecking and Maintaining Tires uTire Labeling
Maintenance
The tire identification number  (TIN) is a group of numbers and letters that look like 
the example in the side column. TIN is  located on the sidewall of the tire.
Cold Tire Pressure  – The tire air pressure when the vehicle has been parked for at 
least three hours or driven less than 1 mile (1.6 km).
Load Rating  – Means the maximum load that a ti re is rated to carry for a given 
inflation pressure.
Maximum Inflation Pressure  – The maximum tire air pressure that the tire can 
hold.
Maximum Load Rating  – Means the load rating for a tire at the maximum 
permissible inflation pr essure for that tire.
Recommended Inflation Pressure  – The cold tire inflation pressure recommended 
by the manufacturer.
Treadwear Indicators (TWI)  – Means the projections within the principal grooves 
designed to give a visual indication  of the degrees of wear of the tread.
■Tire Identification Number (TIN)
■Glossary of Tire Terminology
1Tire Identification Number (TIN)
DOT B97R FW6X 2209
DOT: This indicates that the tire meets all 
requirements of the  U.S. Department of 
Transportation.
B97R: Manufacturer’s identification mark.
FW6X: Tire type code.
22 09: Date of manufacture.
Year
Week
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        Page 485 of 559
483
uuChecking and Maintaining Tires uTire and Wheel Replacement
Maintenance
Tire and Wheel Replacement
Replace your tires with radials of the sa me size, load range, speed rating, and 
maximum cold tire pressure rating (as shown  on the tire’s sidewall). Using tires of a 
different size or construction can cause ce rtain vehicle systems such as the ABS and 
Vehicle Stability Assist ® (VSA ®) system to work incorrectly.
It is best to replace all four tires at the same time. If that isn’t possible, replace the 
front or rear tires in pairs.
Make sure that the wheel’s specificati ons match those of the original wheels.1Tire and Wheel Replacement
3WARNING
Installing improper tires on your vehicle can 
affect handling and stability. This can cause 
a crash in which you can be seriously hurt or 
killed.
Always use the size and type of tires 
recommended in this owner’s manual.
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        Page 489 of 559
487
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 Electric 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 authorized Honda Clarity 
Electric dealer.
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        Page 501 of 559

499
Handling the Unexpected
This chapter explains how to handle unexpected troubles.
If a Tire Goes FlatTemporarily Repairi ng a Flat Tire....... 500
Handling of the Jack ......................... 512
Power System Won’t Start Checking the Procedure ................... 513
If the Smart Entry Remote Battery is Weak .......................................... 514
Emergency Power System Off........... 515
Jump Starting .................................... 516
Overheating How to Handle Overheating ............. 519 Indicator, Coming On/Blinking
If the 12-Volt Battery Charging System Indicator Comes On ....................... 520
If the Brake System Indicator (Red) Comes  On or Blinks ....................................... 521
If the Electric Power Steering (EPS) System 
Indicator Comes On ........................... 522If the Brake System Indicator (Red) Comes On or Blinks at the Same Time 
When the Brake System Indicator 
(Amber) Comes On ...................... 523
If the Low Tire Pressure/TPMS Indicator 
Comes On or Blinks........................ 524 If the Transmission System Indicator Blinks 
along with the Warning Message .... 525
Fuses
Fuse Locations ................................. 526
Inspecting and Changing Fuses ........ 532
Emergency Towing ........................... 533
When You Cannot Open the Charge 
Lid ................................................. 534
When You Cannot Disengage the Charging 
Connector.................................................535When You Cannot Open the Trunk .. 536
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Continued501
uuIf a Tire Goes Flat uTemporarily Repairing a Flat Tire
Handling the Unexpected
■Getting Ready to Temporarily Repair the Flat Tire1Getting Ready to Temporarily Repair the Flat Tire
Repair notificati on label and speed restriction label 
are applied to the side of temporary tire repair kit.
When making a temporary repair, carefully read the 
instruction manual provided with the kit.
Pressure Gauge AIR Power Plug
Pressure Relief Button
Repair Notification LabelInstruction Manual
Sealant/Air Hose
REPAIR
Inflator Switch
Speed Restriction Label
Selector Knob
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