2012 TOYOTA PRIUS V coolant reservoir

372
4-3. Do-it-yourself maintenance
PRIUS v_U (OM47784U)
Engine compar tment
■12-volt battery
 P. 384
Engine coolant reservoir
( P. 377)
Engine oil level dipstick ( P. 373)
Engine oil filler cap ( P. 373)
Power control unit coolant
reservoir ( P. 377)Brake fluid reservoir
( P. 380)
Fuse box ( P. 410)
Radiator ( P. 379)
Condenser ( P. 379)
Electric cooling fans
Washer fluid tank ( P. 382)

377
4-3. Do-it-yourself maintenance
PRIUS v_U (OM47784U)
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. (P. 501)
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.
(P. 501)

378 4-3. Do-it-yourself maintenance
PRIUS v_U (OM47784U)
■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% cool- ant and 50% deionized water. (Minimum temperature: -31 F
[-35 C])
Canada: “Toyota Super Long Life Coolant” is a mixture of 55% cool- ant and 45% deionized water. (Minimum temperature: -44 F
[-42 C])
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.

423
4-3. Do-it-yourself maintenance
PRIUS v_U (OM47784U)
4
Maintenance and care
Replacing light bulbs
■ Headlight low beams (halogen headlights)
For the right side only: Remove
the bolt and unclip the engine
coolant reservoir hose. Then lift
up the air cleaner inlet duct.
After replacing, return the air
cleaner inlet duct to its original
position, and firmly install the stay
of the engine coolant reservoir
hose.
STEP 1

425
4-3. Do-it-yourself maintenance
PRIUS v_U (OM47784U)
4
Maintenance and care
■
Daytime running lights and headlight high beams
For the right side only: Remove the bolt and unclip the engine
coolant reservoir hose. Then lif t up the air cleaner inlet duct.
(  P. 423)
Turn the bulb base counterclockwise.
Vehicles with halogen headlights
Vehicles with LED headlights
Unplug the connector while
pressing the lock release.
When installing, reverse the steps listed.
STEP 1
STEP 2
STEP 3
STEP 4

426 4-3. Do-it-yourself maintenance
PRIUS v_U (OM47784U)
■Parking lights
For the right side only: Remove the bolt and unclip the engine
coolant reservoir hose. Then lif t up the air cleaner inlet duct.
(  P. 423)
Turn the bulb base counterclockwise.
Vehicles with halogen headlights
Vehicles with LED headlights
Remove the light bulb.
When installing, reverse the steps listed.
STEP 1
STEP 2
STEP 3
STEP 4

427
4-3. Do-it-yourself maintenance
PRIUS v_U (OM47784U)
4
Maintenance and care
■
Front side marker lights
For the right side only: Remove the bolt and unclip the engine
coolant reservoir hose. Then lif t up the air cleaner inlet duct.
(  P. 423)
Turn the bulb base counterclockwise.
Vehicles with halogen headlights
Vehicles with LED headlights
Remove the light bulb.
When installing, reverse the steps listed.
STEP 1
STEP 2
STEP 3
STEP 4

490 5-2. Steps to take in an emergency
PRIUS v_U (OM47784U)
CAUTION
■To prevent an accident or injury when inspecting under the hood of
your vehicle
● If steam is seen coming from under the hood, do not open the hood until
the steam has subsided. The engine compartment may be very hot, caus-
ing serious injuries such as burns.
● Check that the indicator on the “POWER” switch and the “READY” indica-
tor are off.
● For vehicles with a hybrid system, there are times when the gasoline
engine automatically starts to run or the cooling fans suddenly start to
operate. Do not touch or approach the rotating parts of the fans, etc. Doing
so may lead to fingers, clothes or tools getting caught, resulting in injury.
● Do not loosen the coolant reservoir cap while the hybrid system and radia-
tor are hot.
Serious injury, such as burns, may result from hot coolant and steam
released under pressure.
NOTICE
■When adding engine/power control unit coolant
Wait until the hybrid system has cooled down before adding engine/power
control unit coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot hybrid sys-
tem too quickly can cause damage to the hybrid system.
■ To prevent damage to the cooling system
Observe the following precautions:
● Avoid contaminating the coolant with foreign matter (such as sand or dust
etc.)
● Do not use commercially available coolant additives