2014 TOYOTA PRIUS C Cooling system

410 4-3. Do-it-yourself maintenance
25 ECU-B NO.2 7.5 AAir conditioning system, gauge
and meters, occupant classifica-
tion system, tire pressure warning
system, starter system, smart key
system, power door lock system
26 AM2 7.5 A Starter system
27 STRG LOCK 20 A Starter system
28 ABS NO.2 10 A Brake system
29 IGCT-MAIN 30 A IGCT NO.2, IGCT NO.3, IGCT
NO.4, PCU, BATT FAN
30 D/C CUT 30 A DOME, ECU-B NO.1
31 PTC HTR NO.1 30 A PTC heater
32 PTC HTR NO.2 30 A PTC heater
33 FAN 30 A Electric cooling fan
34 PTC HTR NO.3 30 A PTC heater
35 DEF 30 A MIR HTR, rear window defogger
36 DEICER 20 A No circuit
37 BATT FAN 10 A Battery cooling fan
38 IGCT NO.2 10 A Hybrid system
39 IGCT NO.4 10 A Hybrid system
40 PCU 10 A Hybrid system
41 IGCT NO.3 10 A Hybrid system
42 MIR HTR 10 A Outside rear view mirror defoggers
FuseAmpereCircuit

5
When trouble arises
487
5-2. Steps to take in an emergency
If your vehicle overheats
Correction procedures■ If is shown on the mu lti-information display
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 fan
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
The following may indicate that your vehicle is overheating.
● ( P. 448) is shown on the multi-information display.
● The hybrid system overheat warning message ( P. 452) is
shown on the multi-information display.
● Steam comes out from under the hood.
STEP1
STEP2
STEP3

488 5-2. Steps to take in an emergency
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 fan operates and to
check for coolant leaks from the radiator or hoses.
The fan operates when the air conditioning system is turned on
immediately after a cold start. Confirm that the fan is 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 fan may not operate in freezing temperatures.)
If the fan is not operating: Stop the hybrid system im mediately and contact your
Toyota dealer.
If the fan is operating: Have the vehicle inspected at the nearest Toyota dealer.
STEP4
STEP5
STEP6
STEP7

5
When trouble arises
489
5-2. Steps to take in an emergency
■
If the hybrid system overheat warning message is shown on
the multi-information 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 fan
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”
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
STEP1
STEP2
STEP3
STEP4
STEP5

490 5-2. Steps to take in an emergency
Start the hybrid system and check for the multi-information
display.
If the message does not disappear:Stop the hybrid system and c ontact your Toyota dealer.
If the message is not displayed: Have the vehicle inspected at the nearest Toyota dealer.
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 on the
multi-information display and the “READY” indicator are off.
When the hybrid system is operating, the gasoline engine may automati-
cally start, or the cooling fan may suddenly operate even if the gasoline
engine stops. Do not touch or approach rotating parts such as the fan,
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 radiator cap while the hybrid system and radiator are
hot.
Serious injuries, such as burns, may result from hot coolant and steam
released under pressure.
STEP6

5
When trouble arises
491
5-2. Steps to take in an emergency
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 additive.

500 6-1. Specifications
Oil viscosity (0W-20 is explained here as an example):
• The 0W in 0W-20 indicates the characteristic of the oil which allowscold startability. Oils with a lower value before the W allow for easier
starting of the engine in cold weather.
• The 20 in 0W-20 indicates the viscosity characteristic of the oil when the oil is at high temperature. An oil with a higher viscosity (one with a
higher value) may be better suited if the vehicle is operated at high
speeds, or under extreme load conditions.
How to read oil container label:
The International Lubricant Spec ification Advisory Committee
(ILSAC) Certification Mark is added to some oil containers to help
you select the oil you should use.
Cooling system
Capacity Gasoline engine
Power control unit 5.6 qt. (5.3 L, 4.7 Imp. qt.)
1.7 qt. (1.6 L, 1.4 Imp. qt.)
Coolant type Use either of the following:
• “Toyota Super Long Life Coolant”
• A similar high-quality ethylene glycol-based non-silicate, non-amine, non-nitrite,
and non-borate coolant with long-life
hybrid organic acid technology
Do not use plain water alone.

548 Alphabetical index
Child safetyAirbag precautions ................125
Child-protectors .......................67
Child restraint system............ 136
How your child should
wear the seat belt .................88
Installing child restraints ........ 140
Moon roof precautions .......... 104
Power window lock switch.......98
Power window precautions ... 100
Removed key battery precautions ......................... 403
Seat belt extender precautions ...........................92
Seat belt precautions ..............89
Seat heater precautions ........ 338
12-volt battery precautions ................. 381, 486
Cleaning Exterior .................................. 346
Interior ................................... 349
Seat belts .............................. 349
Clock ......................................... 189
Coat hooks ............................... 339
Condenser ................................ 375
Console box ............................. 325 Cooling system
Hybrid system overheating ... 487
Cord hook ................................. 272
Cruise control .......................... 217
Cup holders .............................. 329
Curtain shield airbags ............. 116
Customizable features ............ 522
Daytime running light system .................................... 206
Defogger Rear window ......................... 247
Side mirrors........................... 247
Dimension ................................ 496
Dinghy towing .......................... 236
Display Energy flow ............................. 35
Multi-information display ....... 187
Trip information ..................... 187
Warning message ................. 447
Do-it-yourself maintenance .... 360
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