engine coolant TOYOTA PRIUS PLUG-IN 2015 Owners Manual

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2-2. Instrument cluster
PRIUS PHV_OM_OM47A11U_(U)
CAUTION
■To p r e v e n t a n a c c i d e n t
NOTICE
■To p r e v e n t d a m a g e t o t h e e n g i n e a n d i ts c o m p o n e n ts
The engine may be overheating if the high coolant temperature warning light
comes on or flashes. In this case, immediately stop the vehicle in a safe
place, and check the engine after it has cooled completely. (oP. 6 0 7 )
Do not place anything or attach a sticker
in front of the instrument cluster. The item
may obscure or obstruct the display, or
could reflect off the display, possibly
causing an accident.
Instrument cluster

355
2-5. Driving information
PRIUS PHV_OM_OM47A11U_(U)
2
When driving
Winter driving tips
Carry out the necessary preparations and inspections before driving
the vehicle in winter. Always drive the vehicle in a manner appropri-
ate to the prevailing weather conditions.
■Pre-winter preparations
●Use fluids that are appropriate to the prevailing outside tem-
peratures.
•Engine oil
•Engine/power control unit coolant
•Washer fluid
●Have a service technician inspect the condition of the 12-volt
battery.
●Have the vehicle fitted with four snow tires or purchase a set
of tire chains for the front tires.
Ensure that all tires are the same size and brand, and that chains
match the size of the tires.

439
4-2. Maintenance
PRIUS PHV_OM_OM47A11U_(U)
4
Maintenance and care
General maintenance
Engine compartment
ItemsCheck points
Brake fluidIs the brake fluid at the correct
level? (oP. 4 7 2 )
Engine/power control unit coolant
Is the engine/power control unit
coolant at the correct level?
(oP. 4 6 9 )
Engine oilIs the engine oil at the correct
level? (oP. 4 6 5 )
Exhaust systemThere should not be any fumes or
strange sounds.
Radiator/condenser
The radiator and condenser
should be free from foreign
objects. (oP. 4 7 1 )
Washer fluidIs there sufficient washer fluid?
(oP. 4 7 4 )
Listed below are the general maintenance items that should be per-
formed at the intervals specified in the “Owner’s Warranty Informa-
tion Booklet” or “Owner’s Manual Supplement/Scheduled
Maintenance Guide”. It is recommended that any problem you notice
should be brought to the attention of your Toyota dealer or qualified
service shop for advice.

445
PRIUS PHV_OM_OM47A11U_(U)
4
Maintenance and care
4-3. Do-it-yourself maintenance
Do-it-yourself ser vice precautions
If you perform maintenance by yourself, be sure to follow the correct
procedure as given in these sections.
ItemsParts and tools
12-volt battery condition
(oP. 4 7 6 )
•Grease
•Conventional wrench
(for terminal clamp bolts)
Brake fluid level (oP. 4 7 2 )
•FMVSS No.116 DOT 3 or SAE
J1703 brake fluid
•Rag or paper towel
•Funnel (used only for adding
brake fluid)
Engine/power control unit coolant
level (oP. 4 6 9 )
•“Toyota Super Long Life Coolant”
or a similar high quality ethylene
glycol-based non-silicate, non-
amine, non-nitrite and non-borate
coolant with long-life hybrid
organic acid technology
For the U.S.A.:
“Toyota Super Long Life Cool-
ant” is pre-mixed with 50% cool-
ant and 50% deionized water.
For Canada:
“Toyota Super Long Life Cool-
ant” is pre-mixed with 55% cool-
ant and 45% deionized water.
•Funnel (used only for adding cool-
ant)

447
4-3. Do-it-yourself maintenance
PRIUS PHV_OM_OM47A11U_(U)
4
Maintenance and care
CAUTION
The engine compartment contains many mechanisms and fluids that may
move suddenly, become hot, or become electrically energized. To avoid death
or serious injury, observe the following precautions.
■When working on the engine compartment
●Make sure that the indicator on the “POWER” switch and the “READY”
indicator are both off.
●Keep hands, clothing and tools away from the moving fan.
●Be careful not to touch the engine, power control unit, radiator, exhaust
manifold, etc. right after driving as they may be hot. Oil and other fluids
may also be hot.
●Do not leave anything that may burn easily, such as paper and rags, in the
engine compartment.
●Do not smoke, cause sparks or expose an open flame to fuel. Fuel fumes
are flammable.
■When working near the electric cooling fans or radiator grille
Be sure the “POWER” switch is off.
With the “POWER” switch in ON mode, the electric cooling fans may auto-
matically start to run if the air conditioning is on and/or the coolant tempera-
ture is high. (oP. 4 7 1 )
■Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from
getting in your eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner filter removed may cause excessive engine wear
due to dirt in the air.

464
4-3. Do-it-yourself maintenance
PRIUS PHV_OM_OM47A11U_(U)
Engine compar tment
■12-volt battery
oP. 4 7 6
Engine coolant reservoir
(oP. 4 6 9 )
Engine oil level dipstick
(oP. 4 6 5 )
Engine oil filler cap
(oP. 4 6 6 )
Power control unit coolant
reservoir (oP. 4 6 9 )
Brake fluid reservoir
(oP. 4 7 2 )
Fuse box (oP. 4 9 9 )
Radiator (oP. 4 7 1 )
Condenser (oP. 4 7 1 )
Electric cooling fans
Washer fluid tank (oP. 4 7 4 )

469
4-3. Do-it-yourself maintenance
PRIUS PHV_OM_OM47A11U_(U)
4
Maintenance and care
Coolant
The coolant level is satisfactory if it is between the full (“FULL” or “F”)
and low (“LOW” or “L”) lines on the reservoir when the hybrid system
is cold.
Engine coolant reservoir
Reservoir cap
“FULL” line
“LOW” line
If the level is on or below the
“LOW” line, add coolant up to the
“FULL” line. (oP. 6 2 5 )
Power control unit coolant reservoir
Reservoir cap
“F” line
“L” line
If the level is on or below the “L”
line, add coolant up to the “F” line.
(oP. 6 2 5 )
ITO43P111

470
4-3. Do-it-yourself maintenance
PRIUS PHV_OM_OM47A11U_(U)
■Coolant selection
Only use “Toyota Super Long Life Coolant” or a similar high quality ethylene
glycol based non-silicate, non-amine, non-nitrite, and non-borate coolant
with long-life hybrid organic acid technology.
U.S.A.: “Toyota Super Long Life Coolant” is a mixture of 50% coolant
and 50% deionized water. (Minimum temperature: -31qF [-35qC])
Canada: “Toyota Super Long Life Coolant” is a mixture of 55% coolant
and 45% deionized water. (Minimum temperature: -44qF [-42qC])
For more details about coolant, contact your Toyota dealer.
■If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine/power control unit coolant reser-
voir caps, drain cock and water pump.
If you cannot find a leak, have your Toyota dealer test the cap and check for
leaks in the cooling system.
CAUTION
■When the hybrid system is hot
Do not remove the engine/power control unit coolant reservoir caps.
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing serious injuries, such as burns.

536
5-1. Essential information
PRIUS PHV_OM_OM47A11U_(U)
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably
needs adjustment or repair. Contact your Toyota dealer as soon as
possible.
■Visible symptoms
●Fluid leaks under the vehicle
(Water dripping from the air conditioning after use is normal.)
●Flat-looking tires or uneven tire wear
●High engine coolant temperature warning light flashes or
comes on
■Audible symptoms
●Changes in exhaust sound
●Excessive tire squeal when cornering
●St rang e noises re la te d to the suspension system
●Pinging or other noises related to the hybrid system
■Operational symptoms
●Engine missing, stumbling or running roughly
●Appreciable loss of power
●Ve h i c l e p u l l s h e a v i l y t o o n e s i d e w h e n b r a k i n g
●Ve h i c l e p u l l s h e a v i l y t o o n e s i d e w h e n d r i v i n g o n a l e v e l r o a d
●Loss of brake effectiveness, spongy feeling, pedal almost
touches the floor

538
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47A11U_(U)
Stop the vehicle immediately.
The following warning indicates the possibility of damage to the vehi-
cle that may lead to an accident. Immediately stop the vehicle in a
safe place and contact your Toyota dealer.
Warning lightWarning light/Details
Charging system warning light
Indicates a malfunction in the vehicle’s charging system
High coolant temperature warning light
Indicates that the coolant temperature is too high
Changes from a flashing to a solid light when the engine
coolant temperature increases.