2012 TOYOTA PRIUS PHV cooling

5
When trouble arises
599
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47818U_(U)
CAUTION
■
After charging the 12-volt battery
Have the 12-volt battery inspected at your Toyota dealer as soon as possi-
ble.
If the 12-volt battery is deteriorating, continued use may cause the 12-volt
battery to emit a malodorous gas, which may be detrimental to the health of
passengers.
■ When replacing the 12-volt battery
 P. 475
NOTICE
■When handling jumper cables
When connecting the jumper cables, ensure that they do not become entan-
gled in the cooling fans, etc.
■ Exclusive jump starting terminal
The exclusive jump starting terminal is to be used when charging the 12-volt
battery from another vehicle in an emergency. It cannot be used to jump start
another vehicle.

600
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47818U_(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. 534) comes on
or flashes, or a loss of hybrid system power is experienced. (For
example, the vehicle s peed does not increase.)
● “HYBRID SYSTEM OVERHEAT” ( P. 552) is shown on the
multi-informat ion display.
● Steam comes out from under the hood.
1 ÉTAPE
2 ÉTAPE
STEP 3

5
When trouble arises
601
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47818U_(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.
ITO43P111
STEP 4
ITO52P130
STEP 5
6 ÉTAPE
STEP7

602 5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47818U_(U)
■If “HYBRID SYSTEM OVERHEAT” is shown on the multi-infor-
mation display
Stop the vehicle in a safe place.
Stop the hybrid system and carefully lift the hood.
After the hybrid system has
cooled down, 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 coolant level is satisfactory if
it is between the “F” and “L” lines
on the reservoir.Reservoir
“F”
“L”
STEP 1
STEP 2
STEP 3
STEP 4

604 5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47818U_(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.
● Check that the indicator on the “POWER” switch and the “READY” indica-
tor are off.
● On hybrid vehicles, the gasoline engine may automatically 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.
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

617
6-1. Specifications
6
Vehicle specifications
PRIUS PHV_OM_OM47818U_(U)
Cooling system
Ignition system
Capacity
Gasoline
engine7.6 qt. (7.2 L, 6.3 Imp.qt.)
Power
control
unit
2.2 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.

644 6-2. Customization
PRIUS PHV_OM_OM47818U_(U)
ItemFunctionDefault set-tingCustom-ized
setting
Meter and
instrument
panel
( P. 257) Sensor sensitiv-
ity for darkening
the brightness of
the meter, navi-
gation system
and instrument
panel depend-
ing on the out-
side brightness
0 -2 to +2 – – O
Sensor sensitiv-
ity for returning
the brightness of
the meter, navi-
gation system
and instrument
panel to the orig-
inal level
depending on
the outside
brightness 0 -2 to +2 – – O
Automatic
air
conditioning
system
( P. 358) Enable/disable
automatic
operation of the
air conditioning
compressor
when the
“AUTO” switch
ON
ON OFF – O O
Heating/cooling
operation mini-
mized in Eco
drive mode ON OFF – – O

670 Alphabetical index
PRIUS PHV_OM_OM47818U_(U)
Child restraint systemBooster seats, definition ........ 204
Booster seats, installation ..... 212
Convertible seats, definition ............................. 204
Convertible seats,
installation ...........................212
Front passenger occupant classification system ...........198
Infant seats, definition ...........204
Infant seats, installation.........212
Installing child restraint system with LATCH anchors ...........210
Installing child restraint system with seat belts ..................... 212
Installing child restraint system with top tether strap ............216
Child safety
Airbag precautions ................192
Back door precautions .......... 142
Child restraint system............204
Child-protectors ..................... 135
How to charge ......................... 80
How your child should wear the seat belt ........................159
Installing child restraints ........ 209
Power window lock switch..... 171
Power window precautions ...173
Remote Air Conditioning System precautions ............374
Removed electronic key
battery precautions ............. 494
Seat belt extender precautions .........................164
Seat belt precautions ............160
Seat heater precautions ........ 398
12-volt battery precautions ....474 Child-protectors ....................... 135
Cleaning
Exterior.................................. 424
Interior ................................... 428
Seat belts .............................. 429
Clock ......................................... 275
Condenser ................................ 466
Console box ............................. 387
Cooling system
Engine overheating ............... 600
Hybrid system overheating ... 600
Cruise control
Cruise control ........................ 308
Dynamic radar cruise control ................................. 312
Cup holders .............................. 388
Curtain shield airbags ............. 184
Customizable features ............ 639