
5
When trouble arises
551
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47787U_(U)
Warning messageDetailsCorrection 
procedure
(If equipped) • Indicates that the pre-collision 
system is not currently func-
tional because the grille or the 
sensor is dirty.
• This message also appears  when the pre-collision system 
is not functional due to over-
heating. • Check the grille 
and the sensor and 
clean them if they 
are dirty. 
• In case of over- heating, the system 
will become func-
tional once the sys-
tem cools down.
(Flashes)
(If equipped) Indicates that the radar cruise 
control sensor is dirty or cov-
ered with ice.
Clean the sensor.
(Flashes)
(If equipped) Indicates that the radar cruise 
control system is unable to 
judge vehicle-to-vehicle dis-
tance.
If the windshield 
wipers are on, turn 
them off or set 
them to either the 
intermittent or the 
slow mode. 

5
When trouble arises
555
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47787U_(U)
Warning messageDetailsCorrection 
procedure
The fuel filler door has been 
left open. Tighten the fuel 
tank cap and close 
the fuel filler door.
The charging port lid is open. Close the charging 
port lid.
■ Warning message in radar cruise mode (if equipped)
In the following cases, the warning message may not be displayed even if
vehicle-to-vehicle distance decreases:
● When your vehicle and the vehicle ahead are traveling at the same
speed or the vehicle ahead is traveling more quickly than your vehicle.
● When the vehicle ahead is traveling at very low speed.
● Immediately after cruise control speed is set.
● At the instant the accelerator pedal is depressed. 

670 Alphabetical index
PRIUS PHV_OM_OM47787U_(U)
Child restraint systemBooster seats, definition ........ 204
Booster seats, installation ..... 212
Convertible seats, definition ............................. 204
Convertible seats, 
installation ...........................212
Front passenger occupant  classification system ...........198
Infant seats, definition ...........204
Infant seats, installation.........212
Installing child restraint system  with LATCH anchors ...........210
Installing child restraint system  with seat belts ..................... 212
Installing child restraint system  with top tether strap ............216
Child safety
Airbag precautions ................192
Back door precautions .......... 142
Child restraint system............204
Child-protectors ..................... 135
How to charge ......................... 80
How your child should wear the seat belt ........................159
Installing child restraints ........ 209
Power window lock switch..... 171
Power window precautions ...173
Remote Air Conditioning  System precautions ............374
Removed electronic key 
battery precautions ............. 494
Seat belt extender  precautions .........................164
Seat belt precautions ............160
Seat heater precautions ........ 398
12-volt battery precautions ....474 Child-protectors ....................... 135
Cleaning
Exterior.................................. 424
Interior ................................... 428
Seat belts .............................. 429
Clock ......................................... 275
Condenser ................................ 466
Console box ............................. 387
Cooling system
Engine overheating ............... 600
Hybrid system overheating ... 600
Cruise control
Cruise control ........................ 308
Dynamic radar cruise control ................................. 312
Cup holders .............................. 388
Curtain shield airbags ............. 184
Customizable features ............ 639 

671
Alphabetical index
PRIUS PHV_OM_OM47787U_(U)
Daytime running light 
system ................................... 295
Deck board............................... 403
Defogger
Rear window......................... 375
Side mirrors .......................... 375
Dimensions .............................. 610
Dinghy towing ......................... 355
Display Dynamic radar cruise control ................................ 312
Multi-information ................... 266
Warning messages............... 546
Do-it-yourself maintenance .... 439
Door lock Back door ............................. 140
Side doors ............................ 134
Smart key system ... .............. 108
Wireless remote control........ 132
Doors Back door ............................. 140
Door glasses ........................ 171
Door lock .............. 108, 132, 134
Rear door child-protector...... 135
Side doors ............................ 134
Driver’s seat belt reminder  light ........................................ 537
Driving
Break-in tips ......................... 226
Correct posture..................... 182
Procedures ........................... 224
Winter driving tips ................. 349 Eco drive mode switch ............247
Electric power steering ...........328
Electronic key
If the electronic key does not operate properly..................591
Replacing battery ..................493
Emergency, in case of If a warning buzzer sounds ................................533
If a warning light turns on ......533
If the electronic key does not  operate properly..................591
If the hybrid system will not  start .....................................588
If the 12-volt battery is 
discharged ..........................594
If you have a flat tire  .............566
If you lose your keys .............590
If you think something is  wrong ..................................532
If your vehicle becomes  stuck ...................................605
If your vehicle has to be  stopped in an 
emergency ..........................607
If your vehicle needs to be  towed ..................................525
If your vehicle overheats .......600
Emergency flashers  Switch....................................524DE 

675
Alphabetical index
PRIUS PHV_OM_OM47787U_(U)
Odometer ................................. 266
Oil
Engine oil.............................. 460
Opener Back door ............................. 140
Fuel filler door....................... 174
Hood ..................................... 442
Outside rear view mirrors Adjusting and folding ............ 169
Outside rear view mirror  defogger switch .................... 375
Outside temperature 
display ................................... 394
Overheating ............................. 600
Parking brake .......................... 255
Parking lights Switch ................................... 292
PCS ........................................... 335
Personal lights Switch ................................... 383
Wattage ................................ 620
Plug-in hybrid system Driving tips.............................. 67
EV driving range ..................... 58
EV mode................................. 35
EV/HV mode selection 
switch ................................... 37
Features ................................. 32
How to charge ........................ 80
HV mode ................................ 36
Plug-in Hybrid Applications .... 70
Power outlets........................... 395
Power sources........................... 77
“POWER” switch ..................... 238
Power windows ....................... 171
Pre-collision system ............... 335 Radar cruise control 
system ....................................312
Radiator ....................................466
Radio
*
Radio data system*
RDS*
Rear seats
Adjustment ............................149
Folding down .........................150
Rear turn signal lights Replacing light bulbs .............507
Wattage .................................620
Rear view mirror...............166, 169
Rear view monitor system
*
Rear window and outside  rear view mirror 
defoggers ...............................375
Rear window wiper and 
washer ....................................304
Remote Air C onditioning 
System ....................................371
Replacing 
Electronic key battery ............493
Fuses ....................................495
Light bulbs .............................507
Tires ......................................448
Reporting safety defects for  U.S. owners ............................650
O
P
R
*: Refer to “Display Audio System Owner’s Manual”  or “Navigation System Owner’s Manual”. 

677
Alphabetical index
PRIUS PHV_OM_OM47787U_(U)
Switch
Audio remote control switches
*
Cruise control switch ............ 308
Driving mode selectswitch ................................. 247
Eco drive mode switch ......... 247
Emergency flasher switch .... 524
EV/HV mode selection  switch ................................... 37
Fog light switch..................... 298
Fuel filler door opener  switch ................................. 174
Hazard light switch ............... 524
Headlight cleaner switch ...... 307
Ignition switch ....................... 238
Light switches ....................... 292
Power door lock switch......... 134
“POWER” switch .................. 238
Power window switch ........... 171
Pre-collision braking off  switch ................................. 336
Talk switch
*
Telephone switch*
Window lock switch .............. 171
Wipers and washer switch.... 300 Tail lights
Switch....................................292
Talk switch
*
Telephone switch*
Theft deterrent system Immobilizer system ...............179
Tire inflation pressure .............486
Tire information Glossary ................................631
Size .......................................627
Tire identification number ......626
Uniform Tire Quality 
Grading ...............................629
Tires Chains ...................................351
Checking ...............................476
If you have a flat tire ..............566
Inflation pressure...................486
Inflation pressure sensor .......477
Information ............................625
Replacing ..............................448
Rotating tires .........................476
Size .......................................619
Snow tires .............................349
Tire pressure warning 
system ........................476, 538
T
GW Refer to 

678 Alphabetical index
PRIUS PHV_OM_OM47787U_(U)
Tonneau cover .........................404
Tools ......................................... 448
Total load capacity...................348
Touch tracer display ................258
TowingDinghy towing........................355
Emergency towing.................526
Trailer towing.........................354
TRAC ......................................... 328
Traction control........................328
Trailer towing ...........................354
Transmission
Hybrid transmission............... 245
P position switch ...................248
Trip information ....................... 274
Trip meter .................................257
Turn signal lights Replacing light bulbs ............. 507
Switch.................................... 254
Wattage .................................620
USB port
*.................................381
Vanity lights Vanity lights ...........................393
Wattage .................................620
Vanity mirrors...........................393
Vehicle data recordings ............ 24
Vehicle identification  number ...................................611
Vehicle proximity notification  system ...................................... 38
Vehicle stability control...........328
VSC............................................ 328 Warning buzzers
Brake system ........................ 533
Open door  ............................ 537
Seat belt reminder................. 537
Warning lights Anti-lock brake system 
(ABS) .................................. 535
Automatic headlight leveling  system ................................ 536
Brake system ................ 533, 536
Charging system .... ............... 534
Cruise control ........................ 536
Electric power steering 
system ................................ 535
High coolant temperature...... 534
Hybrid system ....................... 535
Low fuel level ........................ 537
Low tire pressure .................. 538
Malfunction indicator lamp .... 535
Open door ............................. 537
Pre-collision system .............. 536
Radar cruise control. ............. 536
Seat belt warning light........... 537
Slip indicator ......................... 536
SRS airbags .......................... 535
Tire pressure warning light.... 538U
V
W 

681
What to do if...
PRIUS PHV_OM_OM47787U_(U)
■
Warning lights
P. 538
or
P. 535
or
P. 533P. 535
P. 534P. 536
P. 534P. 536
P. 536
or
P. 535P. 536
P. 535P. 536
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