2012 TOYOTA PRIUS V coolant level

358
4-2. Maintenance
PRIUS v_U (OM47784U)
General maintenance
Engine compartment
ItemsCheck points
Brake fluid Is the brake fluid at the correct
level? (
P. 380)
Engine/power control unit coolant Is the engine/power control unit
coolant at the correct level?
(P. 377)
Engine oil Is the engine oil at the correct
level?
(P. 373)
Exhaust system There should not be any fumes or
strange sounds.
Radiator/condenser The radiator and condenser
should be free from foreign
objects. (
P. 379)
Washer fluid Is there sufficient washer fluid?
(P. 382)
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.

363
PRIUS v_U (OM47784U)
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 (P. 384)• Grease
• Conventional wrench
(for terminal clamp bolts)
Brake fluid level ( P. 380)
• 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 ( P. 377)
• “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)

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.

5
When trouble arises
443
5-1. Essential information
PRIUS v_U (OM47784U)
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 cond itioning after use is normal.)
● Flat-looking tires or uneven tire wear
● High engine coolant temperatur e warning light flashes or
comes on
■ Audible symptoms
●Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related 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
● Vehicle pulls heavily to one side when braking
● Vehicle pulls heavily to one side when driving on a level road
● Loss of brake effectiveness, s pongy feeling, pedal almost
touches the floor

488 5-2. Steps to take in an emergency
PRIUS v_U (OM47784U)
After the hybrid system has
cooled down sufficiently, check
the engine coolant level and
inspect the cooling system for
leaks.
If necessary, add engine coolant
up to the “FULL” line.
Water can be used in an emer-
gency measure if engine coolant
is unavailable. (P. 501)
Have the vehicle checked at nearest Toyota dealer as soon as possi-
ble.
■If the hybrid system overheat warning light comes on
Stop the vehicle in a safe place and turn off the air condition-
ing system.
Leave the hybrid system operating and carefully lift the hood.
Check if the cooling fans are operating.
If the fans are operating: Wait until the hybrid system overheat warning light turns off
and then stop the hybrid system.
If the warning light does not turn off, call your Toyota dealer.
If the fans are not operating: Stop the hybrid system immediately and call your Toyota
dealer.
STEP 4
STEP 5
STEP 1
STEP 2
STEP 3

5
When trouble arises
489
5-2. Steps to take in an emergency
PRIUS v_U (OM47784U)
After the hybrid system has
cooled down, check the power
control unit coolant level and
inspect the cooling system for
leaks.
If necessary, add power control
unit coolant up to the “F” line.
Water can be used in an emer-
gency measure if power control
unit coolant is unavailable.
(
P. 501)
Have the vehicle checked at nearest Toyota dealer as soon as possi-
ble.
STEP 4
STEP 5
■ Overheating
The following symptoms may occur when your vehicle is overheating:
● Hybrid system output decrease
● Steam is coming from under the hood