Page 512 of 588

5128-2. Steps to take in an emergency
PRIUS c_U (OM52F96U)
Firmly depress the brake pedal and check that is displayed
on the multi-information display.
Press the “POWER” switch.
In the event that the “POWER” swit ch still cannot be operated, contact
your Toyota dealer.
■ Stopping the hybrid system
Shift the shift lever to P and press the “POWER” switch as you normally do
when stopping the hybrid system.
■ Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the
electronic key battery be replaced immediately when the battery is depleted.
( P. 444)
■ Changing “POWER” switch modes
Release the brake pedal and press the “POWER” switch in above.
The hybrid system does not start and modes will be changed each time the
switch is pressed. ( P. 187)
■ If the doors cannot be locked or unlocked by the smart key system
Lock and unlock the doors by the mechanical key or wireless remote contr\
ol.
■ When the electronic key does not work properly
●Make sure that the smart key system has not been deactivated in the cus-
tomization setting. If it is off, turn the function on.
(Customizable features P. 550)
● Check if battery-saving mode is set. If it is set, cancel the function.
(P. 139)
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Page 518 of 588

5188-2. Steps to take in an emergency
PRIUS c_U (OM52F96U)
● ( P. 483) is shown on the multi-information display.
● The hybrid system overhe at warning message (P. 486) 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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Page 520 of 588
5208-2. Steps to take in an emergency
PRIUS c_U (OM52F96U)■
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 chec k 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 in spected at the nearest Toyota dealer.
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Page 521 of 588

5218-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U (OM52F96U)
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 while 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 575 of 588
575What to do if... (Troubleshooting)
PRIUS c_U (OM52F96U)
●The auto power off function will be operated if the vehicle is left in ACCES-
SORY or ON mode (the hybrid system is not running) for a period of time.
( P. 188)
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts? ( P. 475)
●The brake system warning light is on
Is the parking brake released? (P. 200)
Depending on the situation, other types of warning buzzer may also sound.
( P. 473, 482)
●Is the electronic key left inside the vehicle?
Check the message on the multi-information display. ( P. 482)
The “POWER” switch is turned off automatically
(vehicles with a smart key system)
A warning buzzer sounds during driving
A warning buzzer sounds when leaving the vehicle
(vehicles with a smart key system)
Page 576 of 588
576What to do if... (Troubleshooting)
PRIUS c_U (OM52F96U)
●When a warning light turns on or a warning message or indicator is dis-
played, refer to P. 473, 482.
●Stop the vehicle in a safe place and replace the flat tire with the spare
tire. (P. 497)
●Try the procedure for when the vehicle becomes stuck in mud, dirt, or
snow. ( P. 522)
A warning light turns on or a warning message or indicator
is displayed
When a problem has occurred
If you have a flat tire
The vehicle becomes stuck
Page 579 of 588

579Alphabetical index
PRIUS c_U (OM52F96U)
Child safetyAirbag precautions .................. 40
Child-protectors .................... 128
Child restraint system ............. 57
How your child should
wear the seat belt ................. 32
Installing child restraints ......... 61
Moon roof precautions .......... 164
Power window lock switch .... 158
Power window precautions ... 161
Removed key battery precautions ......................... 446
Seat belt extender precautions ........................... 36
Seat belt precautions .............. 34
Seat heater precautions........ 378
12-volt battery precautions ................. 426, 516
Cleaning Exterior ................................. 396
Interior................................... 399
Seat belts .............................. 400
Clock ........................................... 96
Coat hooks ............................... 390
Condenser ................................ 421
Console box ............................. 383
Cooling system
Hybrid system overheating ... 518
Cord hook................................. 280
Cruise control .......................... 247
Cup holders.............................. 385
Curtain shield airbags ............... 38
Customizable features ............ 550 Daytime running light
system.................................... 203
Defogger Rear window ......................... 372
Side mirrors .......................... 372
Dimension ................................ 526
Dinghy towing.......................... 181
Display Energy flow ........................... 108
Multi-information display ......... 94
Trip information....................... 94
Warning message................. 482
Do-it-yourself maintenance .... 409
Doors Back door ............................. 133
Door lock .............................. 127
Door windows ....................... 158
Rear door child protector ...... 128
Side doors ............................ 124
Side mirrors .......................... 156
Driver’s seat belt reminder light ........................................ 475
Driving
Break-in tips.......................... 168
Correct posture ....................... 26
Procedures ........................... 166
Winter driving tips ................. 270D
Page 580 of 588

580Alphabetical index
PRIUS c_U (OM52F96U)
Eco drive mode ........................ 197
Electric power steering ........... 261
Electronic keyIf the electronic key does not operate properly ........... 511
Emergency flashers Switch ................................... 462
Emergency, in case of
If a warning buzzer sounds ........................ 473, 482
If a warning light
turns on .............................. 473
If a warning message is displayed ............................ 482
If the electronic key does not operate properly ........... 511
If the hybrid system will
not start .............................. 508
If the shift lever cannot be shifted from P ................ 510
If the vehicle becomes stuck ................................... 522
If the vehicle 12-volt
battery is discharged .......... 513
If you have a flat tire ............ 497
If you lose your keys ............. 120
If you think something is wrong.................................. 472
If your vehicle has to be stopped in an
emergency.......................... 463
If your vehicle needs to be towed ............................. 465
If your vehicle overheats ....... 518 Engine
Compartment ........................ 415
Engine switch ............... 182, 186
Hood ..................................... 412
How to start the hybrid
system ....... ................. 182, 186
Identification number ............ 527
If the hybrid system will not start .............................. 508
Ignition switch ............... 182, 186
Overheating .......................... 518
“POWER” switch................... 186
Engine coolant Capacity................................ 530
Checking............................... 419
Preparing and checking before winter ...................... 270
Engine oil Capacity................................ 529
Checking............................... 416
Preparing and checking before winter ...................... 270
Engine/power control unit
coolantCapacity................................ 530
Checking............................... 419
Preparing and checking before winter ...................... 270
Engine switch .................. 182, 186
EPS ........................................... 261
EV drive mode ......................... 193
Event data recorder................... 10
Exclusive jump starting terminal .................... 513
E