overheating HONDA CLARITY PLUG-IN 2021 Owner's Manual (in English)

Contents
Child Safety P. 71Safety Labels P. 85
Opening and Closing the Trunk P. 152 Security System P. 155 Opening and Closing the Windows P. 158
Adjusting the Mirrors P. 175 Adjusting the Seats P. 177
Climate Control System P. 195
Audio Error Messages P. 286 General Information on the Audio System P. 290
Bluetooth ® HandsFreeLink ® P. 339
When Driving P. 380 Braking P. 437Parking Your Vehicle P. 453
Charging P. 460 Fuel Economy and CO
2 Emissions P. 475
Maintenance Under the Hood P. 486 Replacing Light Bulbs P. 500
Checking and Maintaining Tires P. 505 12-Volt Battery P. 514 Remote Transmitter Care P. 516
Accessories and Modifications P. 525
Power System Won’t Start P. 541 If the 12-Volt Battery Is Dead P. 545 Overheating P. 548
Fuses P. 559 Emergency Towing P. 567
If You Cannot Open the Charge Lid P.569 If You Cannot Open the Trunk P. 570
Devices that Emit Radio Waves P. 575 Reporting Safety Defects P. 576
Authorized Manuals P. 582 Customer Service Information P. 583
Quick Reference GuideP. 6
Safe DrivingP. 41
Instrument PanelP. 87
ControlsP. 137
FeaturesP. 205
DrivingP. 373
MaintenanceP. 477
Handling the UnexpectedP. 527
InformationP. 571
IndexP. 585
21 CLARITY PHEV CSS-31TRW6300.book 5 ページ ２０２０年５月１９日　火曜日　午前１０時 ４６分

36
Quick Reference Guide
Handling the Unexpected (P 527)
Flat Tire (P 528)
●Park in a safe location and repair the flat
tire using the temporary tire repair kit.
Indicators Come On
(P 551)
●Identify the indicator and consult the
owner’s manual.
Power System Won’t Start
(P 541)
●If the 12-volt battery is dead, jump start
using a booster battery.
Blown Fuse

(P 559)
●Check for a blown fuse if an electrical
device does not operate.
Overheating (P 548)
●Park in a safe location. If you do not see
steam under the hood, open the hood,
and let the power system cool down.
Emergency Towing
(P 567)
●Call a professional towing service if you
need to tow your vehicle.
21 CLARITY PHEV CSS-31TRW6300.book 36 ページ ２０２０年５月１９日　火曜日　午前１０時４６分

106
uuIndicators uDriver Information Interface Wa rning and Information Messages
Instrument Panel
MessageConditionExplanation
●Appears when there is a problem with the sensor on
the 12-volt battery.●Have your vehicle checked by a dealer.
2 Checking the 12-Volt Battery P. 514
●Appears when the engine oil pressure is low.●Appears while driving - Immediately stop in a safe
place.
2If the Low Oil Pressure Warning Appears P. 551
●Appears when the engine coolant temperature gets
abnormally high.
2Overheating P. 548
●Appears when the engine coolant temperature is
near its upper limit.●Drive slowly to prevent overheating.
●Appears if there is a pr oblem with the cooling
system.●Drive slowly to prevent ov erheating and have your
vehicle checked by a deal er as soon as possible.
●Appears when the fuel fill cap is loose or is not
installed.
2Tighten Fuel Cap Message P. 553
21 CLARITY PHEV CSS-31TRW6300.book 106 ページ ２０２０年５月１９日　火曜日　午前１０時４６分

109
uuIndicators uDriver Information Interface Wa rning and Information Messages
Continued
Instrument Panel
MessageConditionExplanation
●Appears when the high voltage battery charge level
is extremely low.●Caused by the low battery charge level -
Immediately charge the high voltage battery.
●Appears when the power system temperature is low.●Your vehicle has less ability to accelerate and may be
harder to start on an incline.
●In extremely cold climates, keep the vehicle stored in a
garage.
●In extremely cold climates, keep the vehicle stored in a
garage and connect th e charging connector.
●Appears when the power system temperature is
high.●Your vehicle has less ability to accelerate and may be
harder to start on an incline.
●Park in a safe place, an d cool the system down.
2Overheating P. 548
●Appears if the power system is in diagnostic mode.●You may notice a decrease in available power. Have
your vehicle checked by a dealer immediately.
●As a result of diagnostics, the POWER SYSTEM
indicator may come on.
2 POWER SYSTEM Indicator P. 90
U.S. models
Canadian models
21 CLARITY PHEV CSS-31TRW6300.book 109 ページ ２０２０年５月１９日　火曜日　午前１０時４６分

505
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 provide the best combination of handling, tread life, and
comfort. Refer to the driver’s doorjamb labe l or specifications page for the specified
pressure.
Underinflated tires wear unev enly, adversely affect handling and fuel 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 a deal er check the wheel alignment.
• Excessive tread wear.
2 Wear Indicators P. 510
•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. 431
Have a dealer check the tires if you feel a consistent
vibration while driving. Ne w tires and any that have
been removed and reinst alled 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.
21 CLARITY PHEV CSS-31TRW6300.book 505 ページ ２０２０年５月１９日　火曜日　午前１０時４６分

527
Handling the Unexpected
This chapter explains how to handle unexpected troubles.
If a Tire Goes FlatTemporarily Repairi ng a Flat Tire....... 528
Handling of the Jack ......................... 540
Power System Won’t Start Checking the Procedure ................... 541
If the Smart Entry Remote Battery is Weak .......................................... 543
Emergency Power System Off........... 544
If the 12-Volt Battery Is Dead .......... 545
Overheating How to Handle Overheating ............. 548
Indicator, Coming On/Blinking
If the Low Oil Pressure Warning Appears .. 551
If the 12-Volt Battery Charging System Indicator Comes On ....................... 552
If the Malfunction Indicator Lamp Comes
On or Blinks ..................................... 553
If the Brake System Indicator (Red) Comes On or Blinks ....................................... 554
If the Electric Power Steering (EPS) System Indicator Comes On ........................... 555
If the Brake System Indicator (Red) Comes On or Blinks at the Same Time
When the Brake System Indicator
(Amber) Comes On ...................... 556
If the Low Tire Pressure/TPMS Indicator
Comes On or Blinks ....................... 557
If the Transmission System Indicator Blinks
along with the Warning Message ...... 558
Fuses Fuse Locations ................................. 559
Inspecting and Changing Fuses ........ 566
Emergency Towing ........................... 567
If You Cannot Unlock the Fuel Fill Door.. 568If You Cannot Open the Charge Lid ... 569
If You Cannot Open the Trunk ........ 570
21 CLARITY PHEV CSS-31TRW6300.book 527 ページ ２０２０年５月１９日　火曜日　午前１０時４６分

548
Handling the Unexpected
Overheating
How to Handle Overheating
Overheating symptoms are as follows:
•The High Temperature. Power Reduced. message appears on the driver
information interface.
• The Stop Driving When Safe. Engine Temperature Too Hot message appears
on the driver information interface.
• Steam or spray comes out of the engine compartment.
The High Temperature. Power Reduced. message appears on the driver
information interface when the po wer system temperature is high.
2Driver Information Interface Warning and Information Messages P. 105
1.Immediately park the vehicle in a safe place.
u Set the parking brake, and put the transmission into
(P, and set the parking
brake. Turn off all accessories and turn on the hazard warning lights.
2. Keep the power mode in ON, and wait until the message disappears.
u If the message does not disappear, have the vehicle inspected at a dealer.
■The High Temperature. Power Reduced. Message Appears
on the Driver Information Interface
21 CLARITY PHEV CSS-31TRW6300.book 548 ページ ２０２０年５月１９日　火曜日　午前１０時４６分

Continued549
uuOverheating uHow to Handle Overheating
Handling the Unexpected
■First thing to do
1. Immediately park the vehicle in a safe place.
2. Turn off all accessories and turn on the hazard warning lights.
u No steam or spray present: Keep the power system on and open the hood.
u Steam or spray is present: Turn off the power system and wait until it
subsides. Then open the hood.
■The Stop Driving When Safe. Engine Temperature Too Hot
Message Appears on the Driver Information Interface1 The Stop Driving When Safe. Engine Temperature Too
Hot Message Appears on the Driver Information Interface
NOTICE
Continuing to drive with the Stop Driving When
Safe. Engine Temperature Too Hot message on
the driver information interface may damage the
engine.
3WARNING
Steam and spray from an overheated
engine can seri ously scald you.
Do not open the hood if steam is coming
out.
21 CLARITY PHEV CSS-31TRW6300.book 549 ページ ２０２０年５月１９日　火曜日　午前１０時４６分

uuOverheating uHow to Handle Overheating
550
Handling the Unexpected
■Next thing to do
1.Check that the cooling fan is operating and
turn the power system off once the Stop
Driving When Safe. Engine
Temperature Too Hot message
disappears.
u If the cooling fan is not operating,
immediately turn the power system off.
2. Once the engine has cooled down, inspect
the coolant level an d check the cooling
system components for leaks.
u If the coolant level in the reserve tank is
low, add coolant until it reaches the
MAX mark.
u If there is no coolan t in the reserve tank,
check that the radiator is cool. Cover the
radiator cap with a heavy cloth and open
the cap. If necessary, add coolant up to
the base of the filler neck, and put the
cap back on.
■Last thing to do
Once the engine has cooled sufficiently, turn the power system on.
If the Stop Driving When Safe. Engine Temperature Too Hot message does not
appear, resume driving. If it appears again, contact a dealer for repairs.
1 The Stop Driving When Safe. Engine Temperature Too
Hot Message Appears on the Driver Information Interface
If the coolant is leaking, contact a dealer for repairs.
Use water as an emergency/temporary measure only.
Have a dealer flush the system with proper antifreeze
as soon as possible.
3WARNING
Removing the radiator cap while the
engine is hot can cause the coolant to spray
out, seriously scalding you.
Always let the engine and radiator cool
down before removing the radiator cap.
Reserve Tank
MAX
MIN
21 CLARITY PHEV CSS-31TRW6300.book 550 ページ ２０２０年５月１９日　火曜日　午前１０時４６分

587
Index
Collision Mitigation Braking SystemTM
(CMBSTM) ................................................. 445
Console Compartment ............................. 188
Control Box .............................................. 467
Controls .................................................... 137
Coolant (Engine) ...................................... 494
Adding to the Radiator ........................... 495
Adding to the Reserve Tank .................... 494
Overheating ............................................ 548
Coolant (High Voltage Battery and Inverter) .................................................. 496
Creeping (Transmission) .......................... 385
Cup Holders .............................................. 189
Customer Service Information ................ 583
Customized Features ....................... 135, 308
D
Daytime Running Lights .......................... 167
Dead Battery (12-Volt) ............................. 545
Deceleration Paddle Selector .................. 394
Deceleration Paddl e Selector Indicator....... 93
Defrosting the Windshield and Windows ................................................. 199
Devices that Emit Radio Waves ............... 575
Dimming Headlights .............................................. 164
Rearview Mirror ...................................... 175
Dipstick (Engine Oil) ................................ 489
Directional Signals (Turn Signal) ............. 163
Display Button .......................................... 213 Door Mirrors
............................................. 176
Doors ......................................................... 139
Auto Door Locking .................................. 151
Auto Door Unlocking ............................... 151
Door Open Message .................................. 46
Keys ........................................................ 139
Locking/Unlocking the Doors from the Inside............................................... 25, 148
Locking/Unlocking the Doors from the Outside.................................................. 141
Lockout Prevention System ...................... 147
DOT Tire Quality Grading ........................ 508
Drive Cycle Score/Lifetime Points ............ 133
Driver Information Interface ................... 126
Driver’s Knee Airbag .................................. 62
Driving ....................................................... 373
Braking .................................................... 437
Shifting Gear ........................................... 386
Transmission ............................................ 385
Turning on the Power .............................. 380
Driving Position Memory System ............. 172
Dust and Pollen Filter ............................... 518
E
Eco Assist® System ...................................... 20
Eco Drive Display ...................................... 132
ECON Mode .............................................. 392
Elapsed Time ............................................. 129
Electric Power Steering (EPS) System
Indicator .................................................... 96 Electronic Stability Control (ESC)
............. 428
Emergency ................................................ 567
Emissions Testing (Readiness Codes) ....... 577
Energy Flow Screen .................................. 217
Engine
Coolant ................................................... 494
If the 12-Volt Battery Is Dead................... 545
Oil ........................................................... 488
Engine Coolant ......................................... 494
Adding to the Radiator ............................ 495
Adding to the Reserve Tank..................... 494
Overheating ............................................ 548
Engine Oil ................................................. 488
Adding .................................................... 490
Checking................................................. 489
Recommended Engine Oil ....................... 488
EPS (Electric Power Steering) System ........ 96
EV Indicator ................................................ 91
Exhaust Gas Hazard (Carbon Monoxide) .. 84
Exterior Care (Cleaning) ........................... 521
Exterior Mirrors ........................................ 176
F
Features.................................................... 205
Filters Dust and Pollen ....................................... 518
Oil ........................................................... 491
Flat Tire ..................................................... 528
Floor Mats ................................................. 520
21 CLARITY PHEV CSS-31TRW6300.book 587 ページ ２０２０年５月１９日　火曜日　午前１０時４６分