2021 HONDA CLARITY PLUG-IN radiator cap

85
Safe Driving
Safety Labels
Label Locations
These labels are in the locations shown. They warn you of potential hazards that can cause serious injury or death. Read these labels
carefully.
If a label comes off or becomes hard to read (except for the U. S. dashboard label which may be removed by the owner), contact a dealer
for a replacement.
Dashboard
Air Conditioner System U.S. models
Canadian models
Radiator Cap
U.S. models only
Charging Lid
U.S. models Canadian models
High Voltage Battery System
Coolant Reserve Tank Cap
Sun VisorU.S. models Canadian modelsMotor Coolant
Reserve Tank Cap
Actuator Lid
U.S. models Canadian models
21 CLARITY PHEV CSS-31TRW6300.book 85 ページ ２０２０年５月１９日　火曜日　午前１０ 時４６分

486
Maintenance
Maintenance Under the Hood
Maintenance Items Under the Hood
Washer Fluid
(Black Cap)
12-Volt BatteryBrake Fluid
(Black Cap)
Inverter Coolant
Expansion Tank
Engine Coolant
Reserve Tank
Engine Oil Fill Cap
Radiator Cap High Voltage
Battery System
Coolant
Expansion Tank
21 CLARITY PHEV CSS-31TRW6300.book 486 ページ ２０２０年５月１９日　火曜日　午前１０時４６分

495
uuMaintenance Under the Hood uEngine Coolant
Maintenance
1. Make sure the engine and radiator are
cool.
2. Turn the radiator cap 1/8 turn counter-
clockwise and relieve any pressure in the
cooling system.
3. Push down and turn the radiator cap
counter-clockwise to remove it.
4. The coolant level should be up to the base
of the filler neck. Add coolant if it is low.
5. Put the radiator cap back on, and tighten it
fully.
■Radiator1Radiator
NOTICE
Pour the fluid slowly and ca refully so you do not spill
any. Clean up any spills immediately; they can
damage components in the engine compartment.
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.
Radiator Cap
21 CLARITY PHEV CSS-31TRW6300.book 495 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