2021 HONDA CLARITY FUEL CELL transmission fluid

uuWhen Driving uTransmission
376
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.
21 CLARITY FCV CSS-31TRT6400_02.book 376 ページ ２０２０年９月２５日　金曜日　午 後３時１５分

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

457
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 Insulating 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 Insulati ng 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
21 CLARITY FCV CSS-31TRT6400_02.book 457 ページ ２０２０年９月２５日　金曜日　午 後３時１５分

463
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 Heav y 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 using a transmission fluid that
is not equivalent to Honda ATF DW-1 is not covered
by Honda’s new vehi cle limited warranty.
1Brake Fluid
NOTICE
Brake fluid marked DOT 5 is not compatible with your
vehicle’s braking system and can cause extensive
damage.
If the specified br ake fluid is not av ailable, 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
21 CLARITY FCV CSS-31TRT6400_02.book 463 ページ ２０２０年９月２５日　金曜日　午 後３時１５分

516
uuIndicator, Coming On/Blinking uIf the Brake System Indicator (Red) Comes On or Blinks
Handling the Unexpected
If the Brake System Indicator (Red) Comes On or
Blinks
■Reasons for the indicator to come on
• The brake fluid is low.
• There is a malfunction in the brake system.
■What to do when the indicator comes on while driving
Depress the brake pedal lightly to check pedal pressure.
• If normal, check the brake fluid level the next time you stop.
• If abnormal, take immediate action . If necessary, downshift the
transmission to slow the vehicle using regenerative braking.
■Reason for the in dicator to blink
• There is a problem with the electric parking brake system.
■What to do when the indicator blinks
Avoid using the parking brake and ha ve your vehicle checked by an
authorized Honda Clarity Fu el Cell dealer immediately.
If the Electric Power Steeri ng (EPS) System Indicator
Comes On
■Reasons for the indicator to come on
• Comes on when there is a problem with the EPS system.
■What to do when the indicator comes on
Stop the vehicle in a safe place, tu rn off the power system, and turn on
the power system again.
If the indicator re-appears and stays on, immediately have your vehicle
inspected by an authorized Ho nda Clarity Fuel Cell dealer.
1If the Brake System Indicator (Red) Comes On or Blinks
Have your vehicle re paired immediately.
It is dangerous to drive with low brake fluid. If there
is no resistance from the brake pedal, stop
immediately in a safe plac e. If necessary, downshift
the gears.
If the brake system indicator and ABS indicator come
on simultaneously, the elec tronic brake distribution
system is not working. Th is can result in vehicle
instability under sudden braking.
Have your vehicle inspected by an authorized Honda
Clarity Fuel Cell dealer immediately.
If the brake system indicator (red) blinks at the same
time when the brake system indicator (amber) comes
on, the parking br ake may not work.
Avoid using the parking brak e and have your vehicle
checked by an authorized Honda Clarity Fuel Cell
dealer immediately. 2 If the Brake System Indicator (Red) Comes
On or Blinks at the Same Time When the
Brake System Indicator (Amber) Comes On
P. 517
21 CLARITY FCV CSS-31TRT6400_02.book 516 ページ ２０２０年９月２５日　金曜日　午 後３時１５分

544
Index
B
Battery12-Volt .................................................... 479
12-Volt Battery Charging System Indicator .......................................... 92, 515
Charging (12-Volt Battery) ....................... 480
High Voltage ........................................... 422
If the 12-Volt Battery Is Dead ................... 508
Maintenance (Checking the 12-Volt Battery) .................................................. 479
Maintenance (Replacing).......................... 481
Belts (Seat) .................................................. 48
Beverage Holders ...................................... 184
Bluetooth ® Audio ..................................... 262
Bluetooth ® HandsFreeLink ®................... 331
Booster Seats (For Children) ....................... 84
Brake System ............................................. 427
Anti-lock Brake System (ABS) ................... 433
Automatic Brake Hold.............................. 431
Brake Assist System ................................. 434
Fluid ........................................................ 463
Foot Brake ............................................... 430
Indicator (Red) ......................................... 517
Parking Brake .......................................... 427
Brake System (Amber)
Indicator .................................................... 90
Brake System (Red) Indicator ...................................... 88, 89, 516
Brightness Control (Head-Up Display) ..... 167
Brightness Control (Instrument Panel) .... 166Bulb Replacement
.................................... 465
Brake/Taillights and Rear Side Marker
Lights .................................................... 466
Front Turn Signal and Front Side Marker Lights .................................................... 465
Headlights ............................................... 465
High-Mount Brake Light .......................... 466
Parking/Daytime Running Lights .............. 465
Rear License Plate Lights .......................... 466
Taillights and Back-Up Lights ................... 466
Taillights/Rear Side Marker, Brake and
Rear Turn Signal Lights .......................... 466
Bulb Specifications ................................... 532
C
Carrying Cargo................................. 367, 369
Certification Label .................................... 534
Changing Bulbs ........................................ 465
Characteristics of Fuel Cell Vehicles .......... 11
Charging System Indicator ....................... 515
Child Safety ................................................. 72
Childproof Door Locks............................. 146
Child Seat .................................................... 72
Booster Seats ............................................ 84
Child Seat for Infants................................. 74
Child Seat for Small Children ..................... 75
Installing a Child Seat with a Lap/Shoulder Seat Belt .................................................. 79
Larger Children ......................................... 83
Rear-facing Child Seat ............................... 74 Selecting a Child Seat ............................... 76
Using a Tether .......................................... 81
Childproof Door Locks ............................. 146
Cleaning the Exterior ............................... 485
Cleaning the Interior ............................... 483
Climate Control System ........................... 190
Changing the Mode................................ 192
Defrosting the Windshield and
Windows .............................................. 194
Dust and Pollen Filter .............................. 482
Sensors ................................................... 198
Using Automatic Climate Control............ 190
Clock ......................................................... 134
CMBS
TM (Collision Mitigation Braking
SystemTM) ................................................ 435
Coat Hook ................................................ 187
Collision Mitigation Braking System
TM
(CMBSTM) ................................................. 435
Console Compartment ............................. 183
Controls .................................................... 133
Coolant ..................................................... 461
Adding to the Radiator ........................... 462
Adding to the Reserve Tank .................... 461
Overheating ............................................ 511
Creeping (Transmission) .......................... 376
Cup Holders .............................................. 184
Customer Service Information ................ 541
Customized Features ....................... 128, 302
21 CLARITY FCV CSS-31TRT6400_02.book 544 ページ ２０２０年９月２５日　金曜日　午 後３時１５分

545
Index
D
Daytime Running Lights.......................... 163
Dead Battery (12-Volt) ............................. 508
Defrosting the Windshield and Windows ................................................. 194
Devices that Emit Radio Waves ............... 535
Dimming Headlights .............................................. 160
Rearview Mirror ...................................... 172
Directional Signals (Turn Signal) ............. 159
Display Button .......................................... 207
Door Mirrors ............................................. 173
Doors ........................................................ 135
Auto Door Locking.................................. 147
Auto Door Unlocking .............................. 147
Door Open Message ................................. 47
Keys........................................................ 135
Locking/Unlocking the Doors from the Inside .............................................. 28, 144
Locking/Unlocking the Doors from the Outside ................................................. 137
Lockout Prevention System ..................... 143
DOT Tire Quality Grading ........................ 473
Driver Information Interface ................... 121
Driver’s Knee Airbag .................................. 63
Driving ...................................................... 365
Braking ................................................... 427
Shifting Gear .......................................... 377
Transmission ........................................... 376
Turning on the Power ............................. 372
Driving Position Memory System ............ 169Dust and Pollen Filter
............................... 482
E
Eco Assist® System ...................................... 24
Eco Drive Display ...................................... 127
Elapsed Time ............................................. 124
Electric Power Steering (EPS) System Indicator ............................................ 95, 516
Electronic Stability Control (ESC) ............. 415
Emergency ................................................ 528
EPS (Electric Power Steering) System ........ 95
Exterior Care (Cleaning) ........................... 485
Exterior Mirrors ........................................ 173
F
FC System in Extreme Cold-weather
Conditions ............................................... 423
Features ..................................................... 199
Filters Dust and Pollen ....................................... 482
Flat Tire ..................................................... 492
Floor Mats ................................................. 484
Fluids Brake ....................................................... 463
Coolant ................................................... 461
Transmission ............................................ 463
Windshield Washer .................................. 464
FM/AM Radio ............................................ 238
Foot Brake ................................................. 430 Front Airbags (SRS)
..................................... 58
Front Seat Heaters .................................... 188
Front Seats ................................................ 174
Adjusting ................................................ 174
Front Sensor Camera ................................ 385
Fuel ...................................................... 35, 447
Economy ................................................. 450
Gauge ..................................................... 118
How to Handle Leaked Hydrogen Gas ..... 513
Hydrogen Leak Indicator............................ 92
Instant Fuel Economy .............................. 124
Low Fuel Indicator ..................................... 92
Range ..................................................... 118
Refueling................................................. 447
Requirement ................................... 447, 532
Fuel Cell Power Generation Monitor ...... 126
Fuel Cell Vehicle Precautions ..................... 14
Fuel Economy ........................................... 450
Fuel Fill Door .............................................. 35
Fuses .......................................................... 520
Inspecting and Changing......................... 527
Locations......................................... 520, 522
G
Gauges ...................................................... 118
Gear Position Indicator ...................... 93, 379
Gear Shift Positions Transmission ........................................... 377
Glass (care) ........................................ 483, 486
Glove Box .................................................. 182
21 CLARITY FCV CSS-31TRT6400_02.book 545 ページ ２０２０年９月２５日　金曜日　午 後３時１５分

547
Index
Inverter Coolant....................................... 461
Adding to the Radiator ........................... 462
Adding to the Reserve Tank .................... 461
Overheating ............................................ 511
iPod ........................................................... 250
J
Jacking Points ........................................... 504
Jump Starting ........................................... 508
K
Key Number Tag ...................................... 136
Keyless Lockout Prevention ..................... 143
Keys ........................................................... 135
Lockout Prevention ................................. 143
Number Tag............................................ 136
Rear Door Won’t Open ........................... 146
Remote Transmitter ................................ 141
Types and Functions................................ 135
L
Lane Keeping Assist System (LKAS) ........ 408
LaneWatchTM............................................ 425
Language (HFL) ........................................ 333
LATCH (Child Seats) ................................... 77
Lights ................................................ 160, 465
Automatic............................................... 161
Bulb Replacement ................................... 465
Daytime Running Lights .......................... 163 High Beam Indicator .................................. 98
Interior .................................................... 180
Light Switches ......................................... 160
Lights On Indicator .................................... 98
Turn Signals ............................................. 159
Load Limits ................................................ 369
Locking/Unlocking .................................... 135
Auto Door Locking/Unlocking .................. 147
Childproof Door Locks ............................. 146
From Inside .............................................. 144
From Outside ........................................... 137
Keys ........................................................ 135
Using a Key ............................................. 142
Lockout Prevention System ...................... 143
Low Battery Charge (12-Volt) .................. 515
Low Smart Entry Remote Signal Strength .................................................. 136
Lower Anchors ............................................ 77
Luggage (Maximum Load Limit) ............. 369
M
Maintenance............................................. 451
12-Volt Battery ........................................ 479
Brake Fluid .............................................. 463
Cleaning .................................................. 483
Climate Control System ........................... 482
Coolant ................................................... 461
Maintenance Minder
TM............................ 455
Precautions .............................................. 452
Radiator .................................................. 462 Remote Transmitter ................................. 481
Replacing Light Bulbs .............................. 465
Safety...................................................... 453
Service Items ........................................... 457
Tires ........................................................ 470
Transmission Fluid ................................... 463
Under the Hood ...................................... 459
Map Lights ................................................ 181
Maximum Load Limit ............................... 369
Meters, Gauges ......................................... 118
Mirrors ...................................................... 172
Adjusting ................................................ 172
Door ....................................................... 173
Exterior ................................................... 173
Interior Rearview ..................................... 172
Modifications (and Accessories) .............. 489
Motor ........................................................ 534
Coolant ................................................... 461
If the 12-Volt Battery Is Dead................... 508
MP3 ........................................................... 259
Multi-View Rear Camera .......................... 445
N
Numbers (Identification).......................... 534
O
Odometer................................................. 123
Open Source Licenses ............................... 300
21 CLARITY FCV CSS-31TRT6400_02.book 547 ページ ２０２０年９月２５日　金曜日　午 後３時１５分