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uuChecking and Maintaining Tires uTire Labeling
470
Maintenance
The tire identification number (TIN) is a gr oup of numbers and letters that look like 
the example in the side co lumn. 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
1 Tire 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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uuChecking and Maintaining Tires uDOT Tire Quality Grading (U.S. Vehicles)
472
Maintenance
The traction grades, from highest to  lowest, are AA, A, B, and C. 
Those grades represent the tire’s  ability to stop on wet pavement 
as measured under controlled conditions on specified 
government test surfaces of asphalt and concrete. A tire marked 
C may have poor traction performance.
The temperature grades are A (the highest), B, and C, 
representing the tire’s resistance  to the generation of heat and its 
ability to dissipate h eat when tested under  controlled conditions 
on a specified indoor laboratory test wheel. Sustained high 
temperature can cause the material  of the tire to degenerate and 
reduce tire life, and excessive temp erature can lead to sudden tire 
failure. The grade C corresponds to a level of performance which 
all passenger car tires must meet under the Federal Motor Vehicle 
Safety Standard No. 109. Grades  B and A represent higher levels 
of performance on the laboratory  test wheel than the minimum 
required by law.
■Traction
■Temperature
1 Traction
Warning: The traction grade 
assigned to this tire is based on 
straight-ahead braking traction tests, 
and does not include acceleration, 
cornering, hydroplaning, or peak 
traction characteristics.
1Temperature
Warning: The temperature grade for 
this tire is establishe d for a tire that is 
properly inflated and not 
overloaded. Excessive speed, 
underinflation, or excessive loading, 
either separately or in combination, 
can cause heat buildup and possible 
tire failure.
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473
uuChecking and Maintaining Tires uWear Indicators
Maintenance
Wear Indicators
The groove where the wear indicator is 
located is 1/16 inch (1.6 mm) shallower than 
elsewhere on the tire. If  the tread has worn so 
that the indicator is ex posed, replace the tire. 
Worn out tires have po or traction on wet 
roads.
Tire Service Life
The life of your tires is dependent on many factors, including driving habits, road 
conditions, vehicle loading, inflation pressure, maintenance history, speed, and 
environmental conditions (even wh en the tires are not in use).
In addition to regular inspections and in flation pressure maintenance, it is 
recommended that you have annual inspections  performed once the tires reach five 
years old. All tires should be removed fro m service after 10 years from the date of 
manufacture, regardless of their condition or state of wear.
Example of a Wear 
Indicator mark
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        Page 491 of 551

489
Handling the Unexpected
This chapter explains how to handle unexpected troubles.
If a Tire Goes FlatTemporarily Repairi ng a Flat Tire....... 490
Handling of the Jack ......................... 502
Power System Won’t Start Checking the Procedure ................... 503
If the Smart Entry Remote Battery is Weak .......................................... 504
Emergency Power System Off........... 505
Jump Starting .................................... 506
Overheating How to Handle Overheating ............. 509
If Hydrogen Gas is Leaking .............. 511Indicator, Coming On/Blinking
If the 12-Volt Battery Charging System Indicator Comes On ....................... 513
If the Brake System Indicator (Red) Comes  On or Blinks ....................................... 514
If the Electric Power Steering (EPS) System  Indicator Comes On ........................... 514If the Brake System Indicator (Red) Comes On or Blinks at the Same Time 
When the Brake System Indicator 
(Amber) Comes On ...................... 515
If the Low Tire Pressure/TPMS Indicator 
Comes On or Blinks ....................... 516
If the Transmission System Indicator Blinks  along with the Warning Message .... 517
Fuses Fuse Locations ................................. 518
Inspecting and Changing Fuses ........ 525
Emergency Towing ........................... 526
When You Cannot Unlock the Hydrogen  Fuel Lid .............................................. 527
When You Cannot Open the Trunk .. 528
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490
Handling the Unexpected
If a Tire Goes Flat
Temporarily Repairing a Flat Tire
If the tire has a large cut or is otherwise severely damaged, you will need to have the 
vehicle towed. If the tire only has a smal l puncture, from a nail for instance, you can 
use the temporary tire repair kit so that  you can drive to the nearest service station 
for a more permanent repair.
If a tire goes flat while driving, grasp  the steering wheel firmly, and brake gradually 
to reduce speed. Then stop in a safe place.
1. Park the vehicle on a firm, level, and non-slippery surface and apply the parking 
brake.
2. Change the gear position to 
(P.
3. Turn on the hazard warning lights an d set the power mode to VEHICLE OFF 
(LOCK).
1 Temporarily Repairing a Flat Tire
The kit should not be used in  the following situations. 
Instead, contact an authorized Honda Clarity Fuel 
Cell dealer or a roadside assistance to have the 
vehicle towed.
•The tire sealant has expired.•More than one tire is punctured.
•The puncture or cut is larger than 3/16 inch (4 mm).
•The tire side wall is da maged or the puncture is 
outside the contact area.
•Damage has been caused by  driving with the tires 
extremely under inflated.
•The tire bead is no longer seated.•The rim is damaged.
Do not remove a nail or  screw that punctured the 
tire. If you remove it from  the tire, you may not be 
able to repair the puncture using the kit.
When the puncture is:Kit Use
Smaller than 3/16 inch  (4 mm)Yes
Larger than 3/16 inch 
(4 mm)No
Contact 
Area
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Continued491
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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492
uuIf a Tire Goes Flat uTemporarily Repairing a Flat Tire
Handling the Unexpected
1. Pull the strap on the right side of the trunk 
and open the lid.
2. Open the fastener and take the kit out of 
the trunk.
3. Place the kit face up, on flat ground near 
the flat tire, and away from traffic. Do not 
place the kit on its side.
Lid
Fastener
Strap
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Continued493
uuIf a Tire Goes Flat uTemporarily Repairing a Flat Tire
Handling the Unexpected
1. Remove the valve cap from the tire valve 
stem.
2. Remove the sealant/air hose from the 
packaging.
3. Attach the sealant/air hose onto the tire 
valve stem. Screw it until it is tight.
■Injecting Sealant and Air1Injecting Sealant and Air
In cold temperatures, the sealant may not flow easily. 
In this situation, warm it up for five minutes before 
using.
The sealant can permanentl y stain clothing and other 
materials. Be careful duri ng handling and wipe away 
any spills immediately.
3WARNING
Tire sealant contains substances that are 
harmful and can be fatal if swallowed.
If accidentally swallowed, do not induce 
vomiting. Drink plenty  of water and get 
medical attention immediately.
For skin or eye contact, flush with cool 
water and get medical attention if 
necessary.
Valve Stem
Valve Cap
Sealant/Air Hose
Valve Stem
Sealant/Air Hose
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