2015 TOYOTA PRIUS engine coolant

502
5-1. Essential information
PRIUS_OM_OM47A17U_DVD_(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 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

504 5-2. Steps to take in an emergency
PRIUS_OM_OM47A17U_DVD_(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.

5
When trouble arises
565
5-2. Steps to take in an emergency
PRIUS_OM_OM47A17U_DVD_(U)
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.
● After the hybrid system has been turned off, check that the indicator on the
“POWER” switch and the “READY” indicator are off.
When the hybrid system is operating, the gasoline engine may automati-
cally start, or the cooling fans may suddenly operate even if the gasoline
engine stops. Do not touch or approach rotating parts such as the fans,
which may lead to fingers or clothing (especially a tie, a scarf or a muffler)
getting caught, resulting in serious 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.

566 5-2. Steps to take in an emergency
PRIUS_OM_OM47A17U_DVD_(U)
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 any coolant additives.

578 6-1. Specifications
PRIUS_OM_OM47A17U_DVD_(U)
Cooling system
Ignition system
Capacity
Gasoline
engine
Without an exhaust heat recovery system
6.9 qt. (6.5 L, 5.7 Imp.qt.)
With an exhaust heat recovery system
7.6 qt. (7.2 L, 6.3 Imp.qt.)
Power
control
unit2.2 qt. (2.1 L, 1.8 Imp.qt.)
Coolant type Use either of the following:
• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-based non- silicate, non-amine, non-nitrite, and non-borate
coolant with long-life hybrid organic acid technol-
ogy
Do not use plain water alone.
Spark plug
Make DENSO SC20HR11
Gap 0.043 in. (1.1 mm)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.

594 6-1. Specifications
PRIUS_OM_OM47A17U_DVD_(U)
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pres-
sure Tire pressure when the vehicle has been
parked for three hours or more, or has not
been driven more than 1 mile or 1.5 km under
that condition
Maximum inflation
pressure The maximum cold inflated
pressure to which a
tire may be inflated, s hown on the sidewall of
the tire
Recommended infla-
tion pressure Cold tire inflation pressure recommended by a
manufacturer
Accessory weight The combined weight (in excess of those stan-
dard items which may be replaced) of auto-
matic transmission, power steering, power
brakes, power windows, power seats, radio
and heater, to the extent that these items are
available as factory-installed equipment
(whether installed or not)
Curb weight The weight of a motor vehicle with standard
equipment, including the maximum capacity of
fuel, oil and coolant, and if so equipped, air
conditioning and additional weight optional
engine
Maximum loaded vehi-
cle weight The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight

633
Alphabetical index
PRIUS_OM_OM47A17U_DVD_(U)
Eco drive mode switch ........... 207
Electric power steering........... 301
Electronic key
If the electronic key does not operate properly ................. 553
Replacing battery ................. 464
Emergency, in case of If a warning buzzer sounds ............................... 503
If a warning light turns on ..... 503
If the electronic key does not operate properly ................. 553
If the hybrid system will not start .................................... 550
If the 12-volt battery is
discharged ......................... 555
If you have a flat tire ............ 537
If you lose your keys............. 552
If you think something is wrong ................................. 502
If your vehicle becomes stuck................................... 567
If your vehicle has to be stopped in an
emergency ......................... 569
If your vehicle needs to be towed ................................. 495
If your vehicle overheats ...... 561
Emergency flashers Switch ................................... 494 Engine
Accessory mode....................197
Compartment ........................428
Hood......................................422
How to start the hybrid system ................................195
Identification number .............574
If the hybrid system will not start .....................................550
Ignition switch........................195
Overheating...........................561
“POWER” switch ...................195
Engine coolant Capacity ................................578
Checking ...............................433
Preparing and checking before winter .......................323
Engine/power control
unit coolantCapacity ................................578
Checking ...............................433
Preparing and checking before winter .......................323
Engine oil Capacity ................................575
Checking ...............................429
Preparing and checking before winter .......................323
Enhanced VSC .........................301
EPS ............................................301
EV drive mode switch ..............202
Event data recorder ...................25E