warning light TOYOTA PRIUS 2012 3.G Workshop Manual

5
When trouble arises
549
5-2. Steps to take in an emergency
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.
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.
● “HYBRID SYSTEM OVERHEAT” is shown on the multi-informa-
tion display:
The power control unit may be overheating.
Follow the correction procedure as described below.
STEP 1
STEP 2

550 5-2. Steps to take in an emergency
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.
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. 566)
Have the vehicle checked at nearest Toyota dealer as soon as possi-
ble.
STEP 3
STEP 4
ITO52P130
STEP 5

5
When trouble arises
551
5-2. Steps to take in an emergency
■
If “HYBRID SYSTEM OVERHEAT” is shown on the multi-infor-
mation display
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 “HYBRID SYSTEM OVERHEAT” disappears 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.
After the hybrid system has
cooled down, check the power
control unit coolant level and
inspect the cooling system for
leaks.
STEP 1
STEP 2
STEP 3
STEP 4

618
Alphabetical index
Alphabetical index
A/CAutomatic air conditioning system ................................ 326
ABS ........................................... 296
Active head restraint ............... 100
Air conditioning system Automatic air conditioning
system ................................ 326
Remote Air Conditioning System ................................ 342
Steering wheel climate remote control switches ...... 337
Airbags
Airbag operating conditions............................ 144
Airbag precautions for your
child .................................... 148
Airbag warning light............... 495
Curtain shield airbag operating conditions............................ 144
Curtain shield airbag precautions ......................... 148
Front passenger occupant classification system ........... 154
General airbag precautions ... 148
Knee airbag ........................... 140
Locations of airbags .............. 140
Modification and disposal of
airbags ................................ 153
Proper driving posture ........... 138
Side airbag operating conditions............................ 144
Side airbag precautions ........ 148
Side and curtain shield airbags operating conditions............ 144
Side and curtain shield airbags precautions ......................... 148
SRS airbags .......................... 140
SRS airbag instructions for
Canadian owners. ............... 603 Antenna .................................... 398
Anti-lock brake system ........... 296
Armrest ..................................... 371
Audio input
*............................. 352
Audio remote control switches
*
Audio system*
Audio/video system*
Automatic air conditioning system
Air conditioning system ......... 326
Automatic air conditioning system ................................ 326
Remote Air Conditioning System................................ 342
Steering wheel climate
remote control switches ...... 337
Automatic headlight leveling system .................................... 255
Automatic light control system .................................... 250
AUX port
*................................. 352
Auxiliary box .................... 363, 376
A

620 Alphabetical index
Child safetyAirbag precautions ................148
Back door precautions ............95
Child restraint system............ 160
Child-protectors .......................88
How your child should wear
the seat belt ........................ 111
Installing child restraints ........ 165
Power window lock switch..... 123
Power window precautions ... 125
Removed electronic key battery
precautions ......................... 455
Seat belt extender precautions ......................... 116
Seat belt precautions ............ 112
Seat heater precautions ........ 370
12-volt battery precautions .... 434
Child-protectors .........................88
Cleaning Exterior .................................. 396
Interior ................................... 399
Seat belts .............................. 400
Clock ......................................... 230
Condenser ................................ 426
Console box ............................. 359
Cooling system
Engine overheating ............... 549
Hybrid system overheating.... 549
Cruise control
Cruise control ........................ 266
Dynamic radar cruise control ................................. 270
Cup holders .............................. 360
Curtain shield airbags ............. 140
Customizable features............. 590 Daytime running light
system .................................... 253
Deck board ............................... 374
Defogger Rear window ......................... 346
Side mirrors........................... 346
Dimensions .............................. 560
Dinghy towing .......................... 323
Display Dynamic radar cruise control ................................. 270
Multi-information ................... 223
Warning messages ............... 507
Do-it-yourself maintenance .... 410
Door lock
Back door ................................ 93
Side doors ............................... 87
Smart key system .. ................. 61
Wireless remote control .......... 85
Doors
Back door ................................ 93
Door glasses ......................... 123
Door lock ..................... 61, 85, 87
Rear door child-protector ........ 88
Side doors ............................... 87
Driver’s seat belt reminder
light ......................................... 498
Driving Break-in tips .......................... 181
Correct posture ..................... 138
Procedures............................ 180
Winter driving tips ................. 317D

621
Alphabetical index
Eco drive mode switch ........... 204
Electric power steering........... 296
Electronic key
If the electronic key does not operate properly ................. 541
Replacing battery ................. 454
Emergency, in case of If a warning buzzer
sounds ............................... 493
If a warning light turns on ..... 493
If the electronic key does not operate properly ................. 541
If the hybrid system will not start .................................... 538
If the 12-volt battery is discharged ......................... 543
If you have a flat tire ............ 523
If you lose your keys............. 540
If you think something is wrong ................................. 492
If your vehicle becomes stuck................................... 554
If your vehicle has to be
stopped in an
emergency ......................... 556
If your vehicle needs to be
towed ................................. 485
If your vehicle overheats ...... 549
Emergency flashers
Switch ................................... 484 Engine
Accessory mode....................194
Compartment ........................419
Hood......................................413
How to start the hybrid
system ................................192
Identification number .............561
If the hybrid system will not start .....................................538
Ignition switch........................192
Overheating...........................549
“POWER” switch ...................192
Engine coolant Capacity ................................566
Checking ...............................424
Preparing and checking before winter .......................317
Engine/power control unit coolantCapacity ................................566
Checking ...............................424
Preparing and checking before winter .......................317
Engine oil Capacity ................................563
Checking ...............................420
Preparing and checking before winter .......................317
Enhanced VSC .........................296
EPS ............................................296
EV drive mode switch ..............199
Event data recorder ...................25E

626 Alphabetical index
Steering wheelAdjustment ............................ 117
Audio switches
*
Storage feature......................... 357
Stuck
If your vehicle becomes stuck ................................... 554
Sun visors................................. 364
Switch
Audio remote control switches
*
Cruise control switch ............. 266
Driving mode selectswitch .................................. 204
Eco drive mode switch .......... 204
Emergency flasher switch ..... 484
EV drive mode switch............ 199
Fog light switch ..................... 256
Hazard light switch ................484
Headlight cleaner switch ....... 265
Ignition switch........................ 192
Light switches........................ 250
Power door lock switch ...........87
“POWER” switch ................... 192
Power window switch ............ 123
Pre-collision braking off switch .................................. 304
Talk switch
*
Telephone switch*
Ventilation switch .................. 339
Window lock switch ............... 123
Wipers and washer switch .... 258 Tail lights
Switch ................................... 250
Talk switch
*
Telephone switch*
Theft deterrent system Immobilizer system ............... 135
Theft prevention labels ........... 137
Tire inflation pressure ............. 447
Tire information Glossary ................................ 582
Size ....................................... 578
Tire identification number...... 577
Uniform Tire Quality Grading ............................... 580
Tires Chains ................................... 319
Checking ............................... 437
If you have a flat tire.............. 523
Inflation pressure .................. 447
Inflation pressure sensor....... 438
Information ............................ 575
Replacing .............................. 523
Rotating tires ......................... 437
Size ....................................... 569
Snow tires ............................. 317
Spare tire .............................. 523
Tire pressure warning system ........................ 437, 499
T

627
Alphabetical index
Tonneau cover......................... 377
Tools......................................... 523
Touch tracer display ............... 215
Total load capacity .................. 316
Towing
Dinghy towing ....................... 323
Emergency towing ................ 486
Trailer towing ........................ 322
TRAC ........................................ 296
Traction control ....................... 296
Trailer towing........................... 322
Transmission Hybrid transmission .............. 202
P position switch................... 205
Trip information....................... 229
Trip meter................................. 214
Turn signal lights Replacing light bulbs ............ 467
Switch ................................... 211
Wattage ................................ 570
USB port
*................................ 352
Vanity lights Vanity lights .......................... 365
Wattage ................................ 570
Vanity mirrors .......................... 365
Vehicle control and operation
data recording ......................... 24
Vehicle identification
number................................... 561
Vehicle proximity notification system ..................................... 32
Vehicle stability control .......... 296
VSC ........................................... 296 Warning buzzers
Brake system ........................493
Open door ............................498
Seat belt reminder .................498
Warning lights
Anti-lock brake system (ABS) ..................................495
Automatic headlight leveling
system ................................497
Brake system ................493, 496
Charging system .... ...............494
Cruise control ........................497
Electric power steering system ................................495
High coolant temperature ......494
Hybrid system .......................495
Low fuel level ........................498
Low tire pressure...................499
Malfunction indicator lamp ....495
Open door .............................498
Pre-collision system ..............496
Radar cruise control. .............497
Seat belt warning light ...........498
Slip indicator..........................496
SRS airbags ..........................495
Tire pressure warning light ....499U
V
W
GW Refer to

630
What to do if...
What to do if...
A tire puncturesP. 523If you have a flat tire
The hybrid system does not start
P. 538If the hybrid system will not start
P. 135Immobilizer system
P. 543If the 12-volt battery is
discharged
The high coolant temperature
warning light flashes or comes on
“HYBRID SYSTEM OVERHEAT”
is displayed
Steam can be seen coming
from under the hood
P. 549If your vehicle overheats
The key is lostP. 540If you lose your keys
The 12-volt battery runs outP. 543If the 12-volt battery is
discharged
The doors cannot be lockedP. 8 7Side doors
P. 9 3Back door
The vehicle is stuck in mud or
sandP. 554If the vehicle becomes stuck
A warning light or indicator
light comes onP. 493If a warning light turns on or a
warning buzzer sounds

631
What to do if...
■
Warning lights
P. 499
or
P. 495
or
P. 493P. 495
P. 494P. 496
P. 494P. 496
P. 496
or
P. 495P. 497
P. 495P. 497
Master warning light ABS warning light
Brake system warning
light (red indicatorF
Electric power steering
system warning light
Charging system
warning lightPre-collision system
warning light
G
High coolant
temperature warning
lightSlip indicator light
Brake system warning
light (yellow indicator)Malfunction indicator
lamp
Automatic headlight
leveling system
warning light
SRS warning lightCruise control indicator
light
G