
395
uuWhen Driving uVehicle Stability Assist (VSA ®), aka Electronic Stability Control (ESC), System
Continued
Driving
Vehicle Stability Assist (VSA ®), aka Electronic 
Stability Control (ESC), System
VSA ® helps to stabilize the vehicle during corn ering if the vehicle turns more or less 
than what was intended. It also assists in  maintaining traction on slippery surfaces. 
It does so by regulating motor out put and selectively applying the brakes.
When VSA ® activates, you may notice that the 
motor do not respond to the accelerator. You 
may also notice some noise from the hydraulic 
system. You will also  see the indicator blink.
■VSA® Operation
1 Vehicle Stability Assist (VSA ®), aka Electronic Stability Control 
(ESC), System
The VSA ® may not function properl y if tire type and 
size are mixed. Make sure to use the same size and 
type of tire, and the air pressures as specified.
When the VSA ® system indicator comes on and stays 
on while driving, there may be a problem with the 
system. While this may not interfere with normal 
driving, have your vehicle checked by an authorized 
Honda Clarity Electric  dealer immediately.
The indicators for the Vehicle Stability Assist (VSA ®) 
System, Vehicle Stability Assist (VSA ®) OFF, low tire 
Pressure/TPMS and Collision Mitigation Braking 
System
TM (CMBSTM) may come on along with a 
message in the driver information interface after re-
connecting the 12-volt battery. Drive a short distance 
at more than 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.
VSA ® cannot enhance stability in all driving situations 
and does not control the entire braking system. You 
still need to drive and corner at speeds appropriate 
for the conditions and alwa ys leave a sufficient 
margin of safety.
The main function of the VSA ® system is generally 
known as Electronic Stability Control (ESC). The 
system also includes a  traction control function.VSA® System 
Indicator
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398
uuWhen Driving uTire Pressure Monitoring System (TPMS)
Driving
Tire Pressure Monitoring System (TPMS)
Instead of directly measuring the pressu re in each tire, the TPMS on this vehicle 
monitors and compares the rolling radius  and rotational characteristics of each 
wheel and tire while you are driving to determine if one or more tires are 
significantly under-inflated. This will caus e the low tire pressure/TPMS indicator to 
come on and a message to appear on  the driver information interface.
You must start TPMS calibration every time you:
• Adjust the pressure in one or more tires.
• Rotate the tires.
• Replace one or more tires.
Before calibrating the TPMS:
• Set the cold tire pressu re in all four tires.
2Checking Tires  P. 459
Make sure:
•The vehicle is at a complete stop.
• The gear position is in 
(P.
• The power mode is in ON.
■TPMS Calibration
1Tire Pressure Monitoring System (TPMS)
The system does not monitor the tires when driving 
at low speed.
Conditions such as low  ambient temperature and 
altitude change directly a ffect tire pressure and can 
trigger the low tire pressure/TPMS indicator to come on.
Tire pressure checked and inflated in:
•Warm weather can beco me under-inflated in 
colder weather.
•Cold weather can become  over-inflated in warmer 
weather.
The low tire pressure/TPMS indicator will not come 
on as a result of over inflation.
The TPMS may not function pr operly if tire type and 
size are mixed. Make sure to use the same size and 
type of tire. 2 Checking and Maintaining Tires  P. 459
The low tire pressure/TPMS indicator may come on 
with a delay or may not come on at all when:
•You rapidly accelerate, decelerate, or turn the 
steering wheel.
•You drive on snowy or slippery roads.•Snow chains are used.
The low tire pressure/TPMS indicator may come on 
under the following conditions:
•There is a heavier and une ven load on the tires, 
such as when towing a trailer, than the condition at 
calibration.
•Snow chains are used.
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409
uuBraking uAnti-lock Brake System (ABS)
Driving
Anti-lock Brake System (ABS)
Helps prevent the wheels from locking up,  and helps you retain steering control by 
pumping the brakes rapidly, much faster than you.
The electronic brake distribu tion (EBD) system, which is part of the ABS, also 
balances the front-to-rear braking distribution according to vehicle loading.
You should never pu mp the brake pedal. Let the ABS work for you by always 
keeping firm, steady pressure on the brake pe dal. This is sometimes referred to as 
“stomp and steer.”
■ABS operation
You may hear an operating noise when the  ABS is working. Keep holding the pedal 
firmly down. On dry pavement, you will ne ed to press on the brake pedal very hard 
before the ABS activates. Ho wever, you may feel the ABS  activate immediately if you 
are trying to stop on snow or ice.
ABS may activate when you depres s the brake pedal when driving on:
• Wet or snow covered roads.
• Roads paved with stone.
• Roads with uneven surf aces, such as potholes, cracks, manholes, etc.
When the vehicle speed goes unde r 6 mph (10 km/h), the ABS stops.
■ABS1Anti-lock Brake System (ABS)
NOTICE
The ABS may not function correc tly if you use a tire of 
the wrong size or type.
If the ABS  indicator comes on while driving, there 
may be a problem with the system.
While normal braking will not be affected, there is a 
possibility that the ABS will  not operating. Have your 
vehicle checked by an authorized Honda Clarity 
Electric dealer immediately.
The ABS is not designed  for the purpose of reducing 
the time or distance it takes for a vehicle to stop: It is 
designed to limit brake lockup which can lead to 
skidding and loss of steering control.
In the following cases, yo ur vehicle may need more 
distance to stop than a vehicle without the ABS:
•You are driving on rough or uneven road surfaces, 
such as gravel or snow.
•The tires are equipped  with snow chains.
The following may be observed with the ABS system:
•Motor sounds coming from the motor 
compartment when the brakes are applied, or 
when system checks are being performed after the 
power system has been turned on and while 
vehicle is accelerates.
•Brake pedal and/or the ve hicle body vibration when 
ABS activates.
These vibrations and sou nds are normal to ABS 
systems and are no cause for concern.
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442
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. 452
•Check the tire pressure monthly. Examin e the tread for wear and foreign objects.
2Checking and Maintaining Tires P. 459
•Check the operation of the exterior lights monthly.
2 Replacing Light Bulbs  P. 454
•Check the condition of the wiper bl ades at least every six months.
2Checking and Maintaining Wiper Blades P. 456
■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. 447
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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459
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. 464
•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. 398
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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461
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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465
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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467
uuChecking and Maintaining Tires uWinter Tires
Maintenance
Winter Tires
If driving on snowy or frozen roads, mount all season marked  M+S tires, snow tires, 
or tire chains; reduce speed; and maintain  sufficient distance between vehicles when 
driving.
Be particularly careful wh en operating the steering wheel or brakes to prevent 
skidding.
Use tire chains, snow  tires, or all season tires when necessary or according to the law.
When mounting, refer to  the following points.
For winter tires:
• Select the size and load ranges that are the same as the original tires.
• Mount the tires to all four wheels.
For tire chains:
• Install them on the front tires only.
• Because your vehicle has limited tire clea rance, we strongly recommend using the 
chains listed below:
• Follow the chain manufactur er’s instruction when installing. Mount them as 
tightly as you can.
• Check that the chains do not touch the brake lines or suspension.
• Drive slowly.
Cable-type: SCC Radial Chain SC1040
1Winter Tires
NOTICE
Traction devices that are th e wrong size or improperly 
installed can damage your vehicle’s brake lines, 
suspension, body, and wheels.  Stop driving if they are 
hitting any part  of the vehicle.
When tire chains are mounted, follow the chain 
manufacturer’s instructi ons regarding vehicle 
operational limits.
If your vehicle is equipped with summer tires, be 
aware that these tires are not designed for winter 
driving conditions. For more information, contact an 
authorized Honda Clarity Electric dealer.
3WARNING
Using the wrong chains, or not properly 
installing chains, can damage the brake 
lines and cause a crash in which you can be 
seriously injured or killed.
Follow all instruction s in this owner’s 
manual regarding the selection and use of 
tire chains.
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