Page 483 of 552

4838-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U (OM52E68U)
● ( P. 450) is shown on the multi-information display.
● The hybrid system overheat warning message ( P. 453) is shown
on the multi-information display.
● Steam comes out from under the hood.
■If is shown on the multi-information display
Stop the vehicle in a safe place and turn off the air conditioning
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 radia-
tor core (radiator) for any
leaks. Radiator
Cooling fan
If a large amount of coolant
leaks, immediately contact
your Toyota dealer.
The coolant level is satisfac-
tory if it is between the
“FULL” and “LOW” lines on
the reservoir.Reservoir
“FULL” line
“LOW” line
If your vehicle overheats
The following may indicate that your vehicle is overheating.
Correction procedures
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2
3
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2
4
1
2
3
Page 484 of 552
4848-2. Steps to take in an emergency
PRIUS c_U (OM52E68U)
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 immedi-
ately 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 condi-
tioning system on and off repeatedly.
(The fan may not operate in freezing temperatures.)
If the fan is not operating:
Stop the hybrid system immediately and contact your Toyota
dealer.
If the fan is operating:
Have the vehicle inspected at the nearest Toyota dealer.
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6
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Page 485 of 552
4858-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U (OM52E68U)■
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 satisfac-
tory if it is between the “F”
and “L” lines on the reservoir.Reservoir
“F” line
“L” line
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
Start the hybrid system and check for the multi-information dis-
play.
If the message does not disappear:
Stop the hybrid system and contact your Toyota dealer.
If the message is not displayed:
Have the vehicle inspected at the nearest Toyota dealer.
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2
3
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Page 486 of 552

4868-2. Steps to take in an emergency
PRIUS c_U (OM52E68U)
WARNING
■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 whil e the hybrid system and radiator are
hot.
Serious injuries, 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 any coolant additive.
Page 548 of 552

548Alphabetical index
PRIUS c_U (OM52E68U)
Radiator .................................... 391
Radio......................................... 264
Rear seatFolding down ........................ 146
Rear turn signal lights
Replacing light bulbs............. 425
Wattage ................................ 498
Rear view monitor system
*.................................. 222
Rear window defogger ............ 342
Rear window wiper .................. 211
Reset the maintenance data ... 373
Replacing Fuses .................................... 416
Key battery............................ 413
Light bulbs ............................ 420
Tires ...................................... 462
Reporting safety defects for U.S. owners...................... 522 Seat belts
Adjusting the seat belt ............ 28
Automatic Locking Retractor (ALR) .................... 32
Child restraint system
installation ............................ 63
Cleaning and maintaining the seat belts...................... 369
Emergency Locking Retractor (ELR) ................... 32
How to wear your seat belt ..... 26
How your child should
wear the seat belt ................. 32
Pregnant women, proper seat belt use ............. 34
Reminder light ...................... 443
Seat belt extenders................. 33
Seat belt pretensioners........... 32
Seat cushion airbag .................. 37
Seat heaters ............................. 348
Seating capacity ...................... 179
Seats Adjustment............................ 145
Adjustment precautions ........ 145
Child seats/child
restraint system
installation ............................ 61
Cleaning ............................... 369
Front seat adjustment ........... 145
Front seat adjustment precautions......................... 145
Head restraint ....................... 150
Properly sitting in the seat ...... 26
Seat heaters ......................... 348
Service reminder indicators................................. 86
RS