2018 HONDA CLARITY PLUG IN HYBRID cooling

104 uu Indicators u Driver Information Interface Wa rning and Information Messages
Instrument Panel Message Condition Explanation●
Appears when there is a pr oblem with the sensor on
the 12-volt battery. ●
Have your vehicle checked by an authorized Honda
Clarity Plug-In Hybrid dealer. 2 Checking the 12-Volt Battery P. 508●
Appears along with the battery charging system
indicator when the batte ry is not charging. ●
Turn off the climate control system and rear defogger to
reduce electricity consumption. 2 If the 12-Volt Battery Charging System Indicator
Comes On P. 546●
Appears when the engine oil pressure is low. ●
Appears while driving - Immediately stop in a safe
place. 2 If the Low Oil Pressure Warning Appears P. 545●
Appears when the engine coolant temperature gets
abnormally high. 2 Overheating P. 542●
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 an author ized Honda Clarity Plug-In
Hybrid dealer as soon as possible.●
Appears when the fuel fill cap is loose or is not
installed. 2 Tighten Fuel Cap Message P. 54718 CLARITY PHEV CSS-31TRW6000.book 104 ページ ２０１７年８月３１日　木曜日　午後２時４９分

Continued
195uu Climate Control System u Using Automatic Climate Control
Controls
■ Switching the vent mode
1. Press the CLIMATE button.
2. Select a desired vent mode icon.
■ A/C on and off
1. Press the CLIMATE button.
2. Select On or Off . 1 Using Automatic Climate Control
When you unlock the doors with your remote, the
driver’s ID ( DRIVER 1 or DRIVER 2 ) is detected, and
the climate control settings are turned to the
respective mode automatically when you set the
power mode to ON.
If any icons are not select ed within several seconds
after the display is switched, it returns to the previous
screen. In this case, press the CLIMATE button again.
You can change the lengt h of time the climate
control display stays on.
2 Customized Features P. 306
While ECON mode is active, the climate control
system may have reduced cooling performance.Models with driving position memory system
All models18 CLARITY PHEV CSS-31TRW6000.book 195 ページ ２０１７年８月３１日　木曜日　午後２時４９分

471Maintenance This chapter discusses basic maintenance.
Before Performing Maintenance
Inspection and Maintenance ............ 472
Safety When Performing Maintenance...473
Parts and Fluids Used in Maintenance
Service ........................................... 474
Maintenance Minder TM
..................... 475
Maintenance Under the Hood
Maintenance Items Under the Hood .. 480
Opening the Hood ........................... 481
Recommended Engine Oil ................ 482
Oil Check ......................................... 483
Adding Engine Oil ............................ 484
Changing the Engine Oil and Oil Filter ...485 Engine Coolant ................................ 488
Cooling System ................................ 490
Transmission Fluid ............................ 492
Brake Fluid ....................................... 492
Refilling Window Washer Fluid......... 493
Replacing Light Bulbs ....................... 494
Checking and Maintaining Wiper
Blades .......................................... 496
Checking and Maintaining Tires
Checking Tires ................................. 499
Tire and Loading Information Label .. 500
Tire Labeling .................................... 500
DOT Tire Quality Grading (U.S. Vehicles).. 502 Wear Indicators ............................... 504
Tire Service Life ................................ 504
Tire and Wheel Replacement ........... 505
Tire Rotation .................................... 506
Winter Tires ..................................... 507
12-Volt Battery ................................. 508
Remote Transmitter Care
Replacing the Button Battery ........... 510
Climate Control System Maintenance .. 511
Cleaning
Interior Care .................................... 513
Exterior Care.................................... 515
Accessories and Modifications ........ 51918 CLARITY PHEV CSS-31TRW6000.book 471 ページ ２０１７年８月３１日　木曜日　午後２時４９分

488 uu Maintenance Under the Hood u Engine Coolant
Maintenance Engine Coolant This coolant is premixed with 50% antifreeze and 50% water. Do not add any
straight antifreeze or water.
We recommend you check the engine coolan t level every time you refuel or you
charge the High Voltage battery. Check the re serve tank first. If it is completely
empty, also check the coolant level in the radiator. Add the engine coolant
accordingly.
1. Make sure the engine and radiator are
cool.
2. Check the amount of c oolant in the reserve
tank.
u If the coolant level is below the MIN
mark, add the specified coolant until it
reaches the MAX mark.
3. Inspect the cooling system for leaks.Specified coolant: Honda Long Life Antifreeze/Coolant Type 2
■ Reserve Tank 1 Engine Coolant NOTICE
Genuine Honda engine coolan t is a 50/50 mixture of
antifreeze and water that can withstand freezing at
temperatures as low as about −31°F (−35°C). If your
vehicle is consistently subjected to temperatures
below this, the concentration of antifreeze in the
coolant should be increased. Consult an authorized
Honda Clarity Plug-In Hybr id dealer for details.
If Honda antifreeze /coolant is not available, you may
use another major brand of non-silicate coolant as a
temporary replacement. Check that it is a high quality
coolant recommended for aluminum engines.
Continued use of any non-Honda coolant can result
in corrosion, causing the cooling system to
malfunction or fail. Have the cooling system flushed
and refilled with Honda anti freeze/coolant as soon as
possible.
Do not add rust inhibitors or other additives to your
vehicle’s cooling system. They may not be compatible
with the coolant or with the engine components.Reserve
TankMAX
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489uu Maintenance Under the Hood u Engine 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.■ Radiator 1 Radiator
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.
3
WARNING 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 Cap18 CLARITY PHEV CSS-31TRW6000.book 489 ページ ２０１７年８月３１日　木曜日　午後２時４９分

490 uu Maintenance Under the Hood u Cooling System
Maintenance Cooling System Coolant is used to reduce the temperature of the high voltage battery and inverter
coolant. When checking the c oolant level, make sure to follow the procedures listed
below. If the coolant level is below the MIN mark, have your vehicle inspected by an
authorized Honda Clarity Plug-In Hybrid dealer.
1. Check the fluid level in the tank.
2. If the coolant level has dropped below the
MIN level, have your vehicle serviced at an
authorized Honda Clarity Plug-In Hybrid
dealer.
u Only a properly trained technician can
refill the coolant an d check the system
for leaks.Specified coolant: Honda Long Life Antifreeze/Coolant Type 2
■ Checking the Inverter Coolant Level 1 Cooling System NOTICE
Genuine Honda engine coolan t is a 50/50 mixture of
antifreeze and water that can withstand freezing at
temperatures as low as about −31°F (−35°C). If your
vehicle is consistently subjected to temperatures
below this, the concentration of antifreeze in the
coolant should be increased. Consult an authorized
Honda Clarity Plug-In Hybr id dealer for details.
Only use the genuine Honda coolant.
Expansion Tank MAX
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491uu Maintenance Under the Hood u Cooling System
Maintenance
1. Check the fluid level in the tank from the
window.
2. If the coolant level has dropped below the
MIN level, have your ve hicle serviced at an
authorized Honda Clarity Plug-In Hybrid
dealer.
u Only a properly trained technician can
refill the coolant and check the system
for leaks.■ Checking the Coolant Level for the High Voltage Battery
and Related Parts MAX
MIN Window
Expansion Tank18 CLARITY PHEV CSS-31TRW6000.book 491 ページ ２０１７年８月３１日　木曜日　午後２時４９分

uu Overheating u How to Handle Overheating
544
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 ag ain, contact an auth orized Honda Clarity
Plug-In Hybrid dealer for repairs. 1 The Stop Driving When Safe. Engine Temperature Too
Hot Message Appears on the Multi-Information Display
If the coolant is leaking, contact an authorized Honda
Clarity Plug-In Hybrid dealer for repairs.
Use water as an emergency/temporary measure only.
Have an authorized Honda Clarity Plug- In Hybrid
dealer flush the system wi th proper antifreeze as
soon as possible.3
WARNING 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 TankMAX
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