Page 489 of 568
5
When trouble arises
489
5-2. Steps to take in an emergency
PRIUS v_OM_OM47840U_(U)
■
If the hybrid system overheat warning light comes on
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”
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
Start the hybrid system and check for the instrument cluster.
If the hybrid system overheat warning light does not turn off: Stop the hybrid system and c ontact your Toyota dealer.
If the hybrid system overheat warning light does not come on:
Have the vehicle inspected at the nearest Toyota dealer.
STEP 1
STEP 2
STEP 3
STEP 4
STEP 5
STEP 6
Page 490 of 568

490 5-2. Steps to take in an emergency
PRIUS v_OM_OM47840U_(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.
● After the hybrid system has been turned off, check that the indicator on the
“POWER” switch and the “READY” indicator are off.
When the hybrid system is operating, the gasoline engine may automati-
cally 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 any coolant additives.
Page 491 of 568

5
When trouble arises
491
5-2. Steps to take in an emergency
PRIUS v_OM_OM47840U_(U)
If the vehicle becomes stuck
CAUTION
■When attempting to free a stuck vehicle
If you choose to push the vehicle back and forth to free it, make sure the sur-
rounding area is clear to avoid striki ng other vehicles, objects or people. The
vehicle may also lunge forward or lu nge back suddenly as it becomes free.
Use extreme caution.
■ When changing the shift position
Be careful not to change the shift position with the accelerator pedal
depressed.
Changing the shift position to any positions other than P or N may cause the
vehicle to accelerate abruptly, causing an accident and resulting in death or
serious injury.
Carry out the following procedures if the tires spin or the vehicle
becomes stuck in mud, dirt or snow:
Set the parking brake and shift the shift position to P. Stop
the hybrid system.
Remove the mud, snow or sand from around the stuck tire.
Place wood, stones or some other material under the tires
to help provide traction.
Restart the hybrid system.
Shift the shift position to D or R, release the parking brake
and carefully apply the accelerator to free the vehicle.STEP 1
STEP 2
STEP 3
STEP 4
STEP 5
Page 554 of 568

554 Alphabetical index
PRIUS v_OM_OM47840U_(U)
Daytime running light system .................................... 216
Deck board ............................... 327
Defogger
Rear window ......................... 293
Side mirrors ........................... 293
Dimensions............................... 496
Dinghy towing .......................... 276
Display Dynamic radar cruise control ................................. 233
Trip information ..................... 201
Do-it-yourself main tenance..... 363
Door lock Back door ................................79
Side doors ...............................74
Smart key system... .................57
Wireless remote control ..........72
Door pockets ............................ 311
Doors Back door ................................79
Door glasses ......................... 112
Door lock ..................... 57, 72, 74
Rear door child-protector ........75
Side doors ...............................74
Driver’s seat belt reminder light ......................................... 451
Driving
Break-in tips .......................... 165
Correct posture ..................... 122
Procedures ............................ 164
Winter driving tips.................. 271 Eco drive mode switch ............ 187
Electric power steering ........... 250
Electronic key
If the electronic key does not operate properly ........... 479
Replacing battery .................. 407
Emergency, in case of If a warning buzzer sounds ................................ 444
If a warning light turns on ...... 444
If the electronic key does not operate properly ........... 479
If the hybrid system will not start............................... 476
If the 12-volt battery is
discharged .......................... 481
If you have a flat tire ............. 462
If you lose your keys ............. 478
If you think something is wrong .................................. 443
If your vehicle becomes stuck ................................... 491
If your vehicle has to be stopped in an
emergency .......................... 493
If your vehicle needs to be towed .................................. 437
If your vehicle overheats ....... 487
Emergency flashers Switch ................................... 436DE