engine overheat TOYOTA PRIUS V 2012 Owners Manual (in English)

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PRIUS v_U (OM47674U)
4-1. Maintenance and careCleaning and protecting the vehicle exterior............ 346
Cleaning and protecting the vehicle interior............. 350
4-2. Maintenance Maintenance requirements ..................... 353
General maintenance.......... 356
Emission inspection and maintenance (I/M)
programs........................... 360
4-3. Do-it-yourself maintenance Do-it-yourself service precautions ....................... 361
Hood ................................... 364
Positioning a floor jack ........ 367
Engine compartment ........... 370
12-volt battery ..................... 382
Tires .................................... 387
Tire inflation pressure ......... 396
Wheels ................................ 400
Air conditioning filter............ 403
Electronic key battery.......... 406
Checking and replacing fuses ................................. 408
Light bulbs........................... 419 5-1. Essential information
Emergency flashers............ 434
If your vehicle needs to be towed................................ 435
If you think something is wrong ............................... 441
5-2. Steps to take in an emergency If a warning light turns on or a warning buzzer sounds .... 442
If you have a flat tire ........... 460
If the hybrid system will not start .................................. 474
If you lose your keys........... 476
If the electronic key does not operate properly ......... 477
If the 12-volt battery is discharged........................ 479
If your vehicle overheats .... 485
If the vehicle becomes stuck ................................. 489
If your vehicle has to be stopped in an
emergency ....................... 491
4Maintenance and care5When trouble arises

166 2-1. Driving procedures
PRIUS v_U (OM47674U)
CAUTION
●Do not shift the shift position to P while the vehicle is moving.
Doing so can damage the transmission and may result in a loss of vehicle\
control.
● Do not shift the shift position to R while the vehicle is moving forward.
Doing so can damage the transmission and may result in a loss of vehicle\
control.
● Do not shift the shift position to D while the vehicle is moving backward.
Doing so can damage the transmission and may result in a loss of vehicle\
control.
● Moving the shift position to N while the vehicle is moving will disengage
the hybrid system. Engine braking is not available with the hybrid system
disengaged.
● During normal driving, do not turn off the hybrid system. Turning the hybrid
system off while driving will not cause loss of steering or braking control,
but the power assist to these systems will be lost. This will make it more
difficult to steer and brake, so you should pull over and stop the vehicle as
soon as it is safe to do so.
However, in the event of an emergency, such as if it becomes impossible
to stop the vehicle in the normal way: P. 491
● Use engine braking (shift position B) to maintain a safe speed when driv-
ing down a steep hill.
Using the brakes continuously may cause the brakes to overheat and lose
effectiveness. (P. 183)
● Do not adjust the positions of the steering wheel, the seat, or the inside or
outside rear view mirrors while driving.
Doing so may result in a loss of vehicle control that can cause accidents,
resulting in death or serious injury.
● Always check that all passengers’ arms, heads or other parts of their body
are not outside the vehicle, as this may result in death or serious injury.

168 2-1. Driving procedures
PRIUS v_U (OM47674U)
CAUTION
■When the vehicle is stopped
● Do not depress the accelerator pedal unnecessarily.
If the vehicle is in any shift position other than P or N, the vehicle may
accelerate suddenly and unexpectedly, causing an accident.
● Do not leave the vehicle with the hybrid system on for a long time.
If such a situation cannot be avoided, park the vehicle in an open space
and check that exhaust fumes do not enter the vehicle interior.
● In order to prevent accidents due to the vehicle rolling away, always keep
depressing the brake pedal while the “READY” indicator is on. Apply the
parking brake as necessary.
● If the vehicle is stopped on an incline, in order to prevent accidents caused
by the vehicle rolling forward or backward, always depress the brake pedal
and securely apply the parking brake as needed.
● Avoid revving or racing the engine.
Running the engine at high speed while the vehicle is stopped may cause
the exhaust system to overheat, which could result in a fire if combustible
material is nearby.
■ When the vehicle is parked
● Make sure to firmly apply the parking brake and shift the shift position to P.
Failure to do so may cause the vehicle to move, or the vehicle to acceler-
ate suddenly if the accelerator pedal is accidentally depressed. Also, when
leaving the vehicle, make sure to turn off the hybrid system and lock the
vehicle.
Sound or shuddering may not be noticed even when the hybrid vehicle is
ready to drive (when the “READY” indicator is illuminated).

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2-2. Instrument cluster
PRIUS v_U (OM47674U)
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When driving
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Engine speed
On hybrid vehicles, engine speed is precisely controlled in order to help
improve fuel efficiency and reduce exhaust emissions etc.
There are times when the engine speed that is displayed may differ even
when vehicle operation and driving conditions are the same.
■ Brightness of the instrument panel light
If the headlight switch is turned to ON while the surrounding area is dark, the
instrument panel lights will dim.
■ When disconnecting and reconnect ing 12-volt battery terminals
The average fuel consumption and cruising range will be reset.
NOTICE
■ To prevent damage to the engine and its components
The engine may be overheating if the high coolant temperature warning light
comes on or flashes. In this case, immediately stop the vehicle in a safe
place, and check the engine after it has cooled completely. ( P. 485)
■ The trip information disp lay at low temperatures
Allow the interior of the vehicle to warm up before using the liquid crystal
information display. At extremely low temperatures, the information display
monitor may respond slowly, and display changes may be delayed.

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When trouble arises
485
5-2. Steps to take in an emergency
PRIUS v_U (OM47674U)
If your vehicle overheats
Correction procedures■ If the high coolant temperature warning light flashes or comes
on
Stop the vehicle in a safe place and turn off the air condition-
ing system.
Check to see if steam is coming out from under the hood.
If you see steam: Stop the hybrid system. Carefully lift the hood after the
steam subsides and then restart the hybrid system.
If you do not see steam: Leave the hybrid system operating and carefully lift the
hood.
Check to see if the cooling fans are operating.
If the fans are operating: Wait until the high coolant temperature warning light goes
off and then stop the hybrid system.
If the fans are not operating: Stop the hybrid system immediately and call your Toyota
dealer.
The following may indicate that your vehicle is overheating:
●The high coolant temperature warn ing light flashes or comes on:
The engine may be overheating.
● The hybrid system overhe at warning light comes on:
The power control unit may be overheating.
Follow the correction procedure as described below.
STEP 1
STEP 2
STEP 3

486 5-2. Steps to take in an emergency
PRIUS v_U (OM47674U)
After the hybrid system has
cooled down sufficiently, check
the engine coolant level and
inspect the cooling system for
leaks.
If necessary, add engine coolant
up to the “FULL” line.
Water can be used in an emer-
gency measure if engine coolant
is unavailable. (P. 499)
Have the vehicle checked at nearest Toyota dealer as soon as possi-
ble.
■If the hybrid system overheat warning light comes on
Stop the vehicle in a safe place and turn off the air condition-
ing system.
Leave the hybrid system operating and carefully lift the hood.
Check if the cooling fans are operating.
If the fans are operating: Wait until the hybrid system overheat warning light turns off
and then stop the hybrid system.
If the warning light does not turn off, call your Toyota dealer.
If the fans are not operating: Stop the hybrid system immediately and call your Toyota
dealer.
STEP 4
STEP 5
STEP 1
STEP 2
STEP 3

551
Alphabetical index
PRIUS v_U (OM47674U)
Bluetooth®*
Bottle holders .......................... 309
Brake
Fluid...................................... 501
Parking brake ....................... 193
Brake assist ............................. 250
Break-in tips ............................ 163
Brightness control Instrument panel light
control ................................ 197
Camera
*
Care Exterior ................................. 346
Interior .................................. 350
Seat belts ............................. 351
Cargo capacity ........................ 270
Cargo hooks ............................ 326
CD player
*
Chains ...................................... 272
Child restraint system
Booster seats, definition ....... 141
Booster seats, installation .... 150
Convertible seats, definition............................. 141
Convertible seats, installation .......................... 150
Front passenger occupant classification system .......... 135
Infant seats, definition .......... 141
Infant seats, installation ........ 150
Installing child restraint system with LATCH anchors .......... 147
Installing child restraint system with seat belts .................... 150
Installing child restraint system
with top tether strap ........... 155 Child safety
Airbag precautions ................129
Back door precautions ............78
Child restraint system............141
Child-protectors .......................72
How your child should wear the seat belt ..........................99
Installing child restraints ........146
Panoramic roof precautions .........................322
Power window lock switch.....109
Power window precautions ...111
Removed electronic key battery precautions .........................407
Seat belt extender
precautions .........................103
Seat belt precautions ............100
Seat heater precautions ........318
12-volt battery precautions ....384
Child-protectors .........................72
Cleaning Exterior ..................................346
Interior ...................................350
Seat belts ..............................351
Clock .........................................314
Condenser ................................377
Console box .............................306
Cooling system
Engine overheating ...............485
Hybrid system overheating....485
Cruise control
Cruise control ........................229
Dynamic radar cruise control .................................233
Cup holders ..............................307
Curtain shield airbags .............121
Customizable features.............523
C
*: Refer to “Display Audio System Owner’s Manual” or “Navigation System Owner’s Manual”.

553
Alphabetical index
PRIUS v_U (OM47674U)
Engine
Accessory mode ................... 175
Compartment........................ 370
Hood ..................................... 364
How to start the hybrid system................................ 173
Identification number ............ 495
If the hybrid system will not start .................................... 474
Ignition switch ....................... 173
Overheating .......................... 485
“POWER” switch .................. 173
Engine coolant Capacity ............................... 499
Checking .............................. 375
Preparing and checking before winter ...................... 271
Engine/power control unit coolant
Capacity ............................... 499
Checking .............................. 375
Preparing and checking before winter ...................... 271
Engine oil Capacity ............................... 497
Checking .............................. 371
Preparing and checking before winter ...................... 271
Enhanced VSC......................... 250
EPS ........................................... 250
EV drive mode switch ............. 180
Event data recorder .................. 22 Floor mats.................................324
Fluid
Brake .....................................501
Washer ..................................380
Fog lights Replacing light bulbs .............419
Switch....................................219
Wattage .................................504
Foot lights.................................299
Front fog lights
Replacing light bulbs .............419
Switch....................................219
Wattage .................................504
Front passenger occupant classification system ............135
Front passenger’s seat belt reminder light.........................449
Front seats
Adjustment ..............................81
Flattening seatbacks ...............82
Front side marker light Replacing light bulbs .............419
Wattage .................................504
Front turn signal lights Replacing light bulbs .............419
Switch....................................192
Wattage .................................504
Fuel
Capacity ................................496
Fuel gauge ............................195
Information ............................505
Refueling ...............................112
Type ......................................505
Fuel door...................................112
Fuel filler door ..........................112
Fuses.........................................408F

555
Alphabetical index
PRIUS v_U (OM47674U)
License plate lights
Replacing light bulbs ............ 419
Wattage ................................ 504
Light bulbs Replacing ............................. 419
Wattage ................................ 504
Lights Emergency flasher switch .... 434
Fog light switch..................... 219
Foot lights ............................. 299
Hazard light switch ............... 434
Headlight switch ................... 211
Interior lights ......................... 300
Personal lights ...................... 301
Replacing light bulbs ............ 419
Shift lever lighting ................. 299
Turn signal lever ................... 192
Turn signal light switch ......... 192
Vanity lights .......................... 313
Wattage ................................ 504
Load capacity .......................... 270
Luggage compartment light Switch ..................................... 77
Wattage ................................ 504
Luggage cover......................... 328
Maintenance
Do-it-yourself maintenance .. 361
General maintenance ........... 356
Maintenance data ................. 494
Maintenance requirements ... 353
Reset the maintenance data .................................... 354 Meter
Instrument panel light control .................................197
Meters ...................................195
Speed unit select button........197
Trip information display .........199
Micro dust and pollen filter .....285
Microphone
*............................338
Mirrors
Inside rear view mirror...........105
Side mirror heater .................293
Side mirrors ...........................107
Vanity mirrors ........................313
MP3 disc
*
Navigation system (refer to “Navigation
System Owner’s Manual”)
Noise from under vehicle ..........20
Odometer ..................................196
Oil Engine oil ..............................371
Opener Back door ................................76
Fuel filler door .......................112
Hood......................................364
Outside rear view mirrors Adjusting and folding .............107
Outside rear view mirror defogger switch .....................293
Outside temperature
display ....................................278
Overhead console ....................310
Overheating ..............................485
L
M
N
O
*: Refer to “Display Audio System Owner’s Manual” or “Navigation System Owner’s Manual”.

559
Alphabetical index
PRIUS v_U (OM47674U)
Warning buzzers
Brake system........................ 442
Open door ........................... 448
Seat belt reminder ................ 449
Warning lights Anti-lock brake system
(ABS) ................................. 444
Automatic headlight leveling system................................ 446
Brake system................ 442, 445
Charging system .... .............. 443
Cruise control ....................... 446
Electric power steering
system................................ 444
High coolant temperature ..... 443
Hybrid system....................... 443
Hybrid system overheat........ 447
LED headlights ..................... 446
Low engine oil pressure ....... 443
Low fuel level........................ 449
Low hybrid battery (traction battery) ................. 447
Low tire pressure .................. 449
Malfunction indicator lamp.... 444
Open door ............................ 448
Parking lock system ............. 445
P position request... .............. 447
Pre-collision system ............. 445
Radar cruise control. ............ 446
Seat belt warning light .......... 449
Slip indicator ......................... 445
Smart key system ... .............. 457
SRS airbags ......................... 444
Tire pressure warning light ... 449 Warning message
Parking lock system ..............446
Washer
Checking ...............................380
Preparing and checking before winter .......................271
Switch....................................221
Washing and waxing ...............346
Weight Cargo capacity ......................270
Load limits .............................270
Weight ...................................494
Wheels ......................................400
Window glasses .......................109
Window lock switch .................109
Windows Power windows .....................109
Rear window defogger ..........293
Washer ..................................221
Windshield wipers ...................221
Winter driving tips ...................271
Wireless remote control key Locking/Unlocking ...................69
Replacing the battery ............406
WMA disc
*
W
*: Refer to “Display Audio System Owner’s Manual” or “Navigation System Owner’s Manual”.