2013 TOYOTA PRIUS V coolant temperature

207
2-2. Instrument cluster
PRIUS v_OM_OM47820U_(U)
2
When driving
■
Engine speed
On hybrid vehicles, engine speed is precisely controlled in order to help
improve fuel efficiency and reduce exhaust emissions etc.
There are times when the engine speed that is displayed may differ even
when vehicle operation and driving conditions are the same.
■ Brightness of the instrument panel light
If the headlight switch is turned to ON while the surrounding area is dark, the
instrument panel lights will dim.
■ When disconnecting and reconnect ing 12-volt battery terminals
The average fuel consumption and cruising range will be reset.
NOTICE
■ To prevent damage to the engine and its components
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. ( P. 489)
■ The trip information disp lay at low temperatures
Allow the interior of the vehicle to warm up before using the liquid crystal
information display. At extremely low temperatures, the information display
monitor may respond slowly, and display changes may be delayed.

380 4-3. Do-it-yourself maintenance
PRIUS v_OM_OM47820U_(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% 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
447
5-2. Steps to take in an emergency
PRIUS v_OM_OM47820U_(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
Low engine oil pressure warning light Indicates that the engine oil pressure is too low
High coolant temper ature warning light
Indicates that the coolant temperature is too high
Changes from a flashing to a solid light when the engine
coolant temperature increases.
Hybrid system warning light (warning buzzer) Indicates a malfunction in the hybrid system

5
When trouble arises
489
5-2. Steps to take in an emergency
PRIUS v_OM_OM47820U_(U)
If your vehicle overheats
Correction procedures■ If the high coolant temperatur e warning light comes on or
flashes
Stop the vehicle in a safe place and turn off the air condition-
ing system, and then stop the hybrid system.
If you see steam: Carefully lift the hood after the steam subsides.
If you do not see steam: Carefully lift the hood.
After the hybrid system has
cooled down sufficiently, inspect
the hoses and radiator core
(radiator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
The following may indicate that your vehicle is overheating.
●The high coolant temperature warning light ( P. 447) comes on
or flashes, or a loss of hybrid system power is experienced. (For
example, the vehicle s peed does not increase.)
● The hybrid system overheat warning light ( P. 451) comes on.
● Steam comes out from under the hood.
STEP 1
STEP 2
STEP 3

490 5-2. Steps to take in an emergency
PRIUS v_OM_OM47820U_(U)
The coolant level is satisfactory if
it is between the “FULL” and
“LOW” lines on the reservoir.Reservoir
“FULL”
“LOW”
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
Start the hybrid system and turn the air conditioning system
on to check that the radiator cooling fans operate and to
check for coolant leaks from the radiator or hoses.
The fans operate when the air conditioning system is turned on
immediately after a cold start. Confirm that the fans are operating by
checking the fan sound and air flow. If it is difficult to check these,
turn the air conditioning system on and off repeatedly.
(The fans may not operate in freezing temperatures.)
If the fans are not operating: Stop the hybrid system im mediately and contact your
Toyota dealer.
If the fans are operating: Have the vehicle inspected at the nearest Toyota dealer.
STEP 4
STEP 5
STEP 6
STEP7

563
Alphabetical index
PRIUS v_OM_OM47820U_(U)
Warning buzzers
Brake system........................ 446
Open door ........................... 452
Seat belt reminder ................ 453
Warning lights Anti-lock brake system
(ABS) ................................. 448
Automatic headlight leveling system................................ 450
Brake system................ 446, 449
Charging system .... .............. 447
Cruise control ....................... 450
Electric power steering
system................................ 448
High coolant temperature ..... 447
Hybrid system....................... 447
Hybrid system overheat........ 451
LED headlights ..................... 450
Low engine oil pressure ....... 447
Low fuel level........................ 453
Low hybrid battery (traction battery) ................. 451
Low tire pressure .................. 453
Malfunction indicator lamp.... 448
Open door ............................ 452
Parking lock system ............. 449
P position request... .............. 451
Pre-collision system ............. 449
Radar cruise control. ............ 450
Seat belt warning light .......... 453
Slip indicator ......................... 449
Smart key system ... .............. 461
SRS airbags ......................... 448
Tire pressure warning light ... 453 Warning message
Parking lock system ..............450
Washer
Checking ...............................384
Preparing and checking before winter .......................273
Switch....................................223
Washing and waxing ...............350
Weight Cargo capacity ......................272
Load limits .............................272
Weight ...................................498
Wheels ......................................404
Window glasses .......................112
Window lock switch .................112
Windows Power windows .....................112
Rear window defogger ..........295
Washer ..................................223
Windshield wipers ...................223
Winter driving tips ...................273
Wireless remote control key Locking/Unlocking ...................72
Replacing the battery ............409
WMA disc
*
W
*: Refer to “Display Audio System Owner’s Manual” or “Navigation System Owner’s Manual”.

564
PRIUS v_OM_OM47820U_(U)
What to do if...
What to do if...
A tire puncturesP. 464If you have a flat tire
The hybrid system does not start
P. 478If the hybrid system will not start
P. 1 1 9Immobilizer system
P. 483If the 12-volt battery is
discharged
The high coolant temperature
warning light flashes or comes on
If the hybrid system overheat
warning light comes on
Steam can be seen coming
from under the hood
P. 489If your vehicle overheats
The key is lostP. 480If you lose your keys
The 12-volt battery runs outP. 483If the 12-volt battery is
discharged
The doors cannot be lockedP. 7 4Side doors
P. 7 9Back door
The vehicle is stuck in mud or
sandP. 493If the vehicle becomes stuck
A warning light or indicator
light comes onP. 446If a warning light turns on or a
warning buzzer sounds