
490
PRIUS v_OM_OM47B12U_(U)
8-2. Steps to take in an emergency
If a warning light turns on or a warning
buzzer sounds
Calmly perform the following actions if any of the warning lights
comes on or flashes. If a light comes on or flashes, but then
goes off, this does not necessarily indicate a malfunction in the
system. However, if this continues to occur, have the vehicle
inspected by your Toyota dealer.
Warning light and warning buzzer list
Warning lightWarning light/Details/Actions
(U.S.A.)
(Canada)
Brake system warning light and warning buzzer (red
indicator)
*1
Indicates that:
• The brake fluid level is low; or
• The brake system is malfunctioning
Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer. Continuing to drive the vehi-
cle may be dangerous.
This light also comes on when the parking brake is not
released. If the light turns off after the parking brake is fully
released, the system is operating normally.
Brake system warning light (yellow indicator)
Indicates a malfunction in:
• The regenerative brake system; or
• The electronically controlled brake system
Have the vehicle inspected by your Toyota dealer
immediately.
Charging system warning light
Indicates a malfunction in the vehicle’s charging system
Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer.
(If equipped)
Low engine oil pressure warning light
Indicates that the engine oil pressure is too low
Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer.
(If equipped)
Hybrid system warning light (warning buzzer)
Indicates a malfunction in the hybrid system
Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer.

4928-2. Steps to take in an emergency
PRIUS v_OM_OM47B12U_(U)
Slip indicator light
Indicates a malfunction in:
• The VSC system;
• The TRAC system; or
• The hill-start assist control system
Have the vehicle inspected by your Toyota dealer
immediately.
The light will flash when the above systems and/or ABS
are operating.
(If equipped)
Parking lock system warning light (warning buzzer)
Indicates a malfunction in the shift control system
• In this situation, there is a possibility that the parking
lock mechanism will not work. When parking, park the
vehicle on a flat surface and apply the parking brake
securely.
• The power switch may not be turned off. If this happens,
applying the parking brake will enable the switch to be
turned off.
Have the vehicle inspected by your Toyota dealer
immediately.
(If equipped)
Parking lock system warning message (warning buzzer)
Indicates a malfunction in the shift control system when
the vehicle is stopped
• In this situation, there is a possibility that the parking
lock mechanism will not work. When parking, park the
vehicle on a flat surface and apply the parking brake
securely.
• The power switch may not be turned off. If this happens,
applying the parking brake will enable the switch to be
turned off.
Have the vehicle inspected by your Toyota dealer
immediately.
(If equipped)
LED headlight warning light
Indicates a malfunction in the LED headlights
The LED headlights will not normally illuminate when
there is a malfunction, however they may be able to illu-
minate depending on the nature of the problem.
Have the vehicle inspected by your Toyota dealer
immediately.
Warning lightWarning light/Details/Actions

4988-2. Steps to take in an emergency
PRIUS v_OM_OM47B12U_(U)
WARNING
■If both the ABS and the brake system warning lights remain on
Stop your vehicle in a safe place immediately and contact your Toyota
dealer. The vehicle will become extremely unstable during braking, and the
ABS system may fail, which could cause an accident resulting in death or
serious injury.
■When the electric power steering system warning light comes on
The steering wheel may become extremely heavy.
If the steering wheel becomes heavier than usual when operating, hold
firmly and operate using more force than usual.
■
If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could
cause a loss of vehicle control and result in death or serious injury.
●Stop your vehicle in a safe place as soon as possible. Adjust the tire
inflation pressure immediately.
●If the tire pressure warning light comes on even after tire inflation pres-
sure adjustment, it is probable that you have a flat tire. Check the tires.
If a tire is flat, change it with the spare tire and have the flat tire
repaired by the nearest Toyota dealer.
●Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate,
you could lose control of the steering wheel or the brakes.
■If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.

503
PRIUS v_OM_OM47B12U_(U)
8
When trouble arises
8-2. Steps to take in an emergency
If a war ning message is displayed
Master warning light
The master warning light also
comes on or flashes in order to
indicate that a message is cur-
rently being displayed on the
multi-information display.
Multi-information display
If any of the warning lights come on again after the following actions
have been performed, contact your Toyota dealer.
: If equipped
If a warning is shown on the multi-information display, stay calm
and perform the following actions:
1
2

5088-2. Steps to take in an emergency
PRIUS v_OM_OM47B12U_(U)
*: Refer to the separate “Scheduled Maintenance Guide” or “Owner’s Manual
Supplement” for the maintenance interval applicable to your vehicle.
(U.S.A. only)
Indicates that all maintenance according to the
driven distance on the maintenance schedule
*
should be performed soon.
Comes on approximately 4500 miles (7200 km)
after the message has been reset.
If necessary, perform maintenance.
(U.S.A. only)
Indicates that all maintenance is required to cor-
respond to the driven distance on the mainte-
nance schedule
*.
Comes on approximately 5000 miles (8000 km)
after the message has been reset. (The indica-
tor will not work properly unless the message
has been reset.)
Perform the necessary maintenance.
Please reset the message after the mainte-
nance is performed. (P. 414)
(If equipped)
The Automatic High Beam switch was pressed
with the low beam headlights turned on.
Turn the high beam headlights on before
pressing the Automatic High Beam switch.
(If equipped)
Indicates that, since the VSC (Vehicle Stability
Control) system was turned off, the pre-collision
brake system operation is stopped
Turn the VSC on. (P. 249)
(If equipped)
Indicates that the pre-collision system is not cur-
rently functional
Check the grille cover and the sensor and
clean them if they are dirty.
Warning messageDetails/Actions
(Flashes)

5128-2. Steps to take in an emergency
PRIUS v_OM_OM47B12U_(U)
Shift control system malfunction
A buzzer also sounds.
Have the vehicle inspected by your Toyota
dealer.
• The hybrid system may not be able to start.
• The parking lock mechanism may not func-
tion. When parking, choose a level location
and apply the parking brake securely.
• The power switch may not be able to be
turned off. In this case, the power switch
may be turned off by applying the parking
brake.
Shift control system malfunction
A buzzer also sounds.
Have the vehicle inspected by your Toyota
dealer immediately. If not inspected, vehi-
cle systems may stop operating normally.
Shift control system communication malfunction
A buzzer also sounds.
Have the vehicle inspected by your Toyota
dealer.
• The hybrid system may not be able to start.
• May not be switched to the P position.
When parking, choose a level location and
apply the parking brake securely.
• The automatically P position selection func-
tion (P. 184) may not function. Before
turning the power switch off, securely press
the P position switch, and be sure to check
that the shift position is in P by verifying the
shift position or P position switch operation
indicator lights.
• The power switch may not be able to be
turned off. In this case, the power switch
may be turned off by applying the parking
brake.
Warning messageDetails/Actions

604Alphabetical index
PRIUS v_OM_OM47B12U_(U)
Antenna
Smart key system ................. 130
Radio .................................... 291
Anti-lock brake system
(ABS) ...................................... 246
Function ................................ 246
Warning light ......................... 491
Approach warning ................... 219
Armrest ..................................... 387
Assist grips .............................. 388
Audio input............................... 273
Audio system
(Entune Audio) ...................... 269
Antenna ................................ 291
Audio input ............................ 273
AUX port ............................... 308
Basic operations ................... 274
Bluetooth
® audio................... 321
CD player .............................. 292
iPod....................................... 298
MP3/WMA disc ..................... 292
Optimal use........................... 288
Portable music player ........... 273
Radio .................................... 290
Steering wheel audio
switches.............................. 272
USB memory ........................ 303
Audio system (Entune Premium
Audio with Navigation)
*
Automatic air conditioning
system
Air conditioning filter ............. 457
Automatic air conditioning
system ................................ 364Automatic door locking
and unlocking systems ........ 123
Automatic headlight
leveling system ..................... 192
Automatic High Beam ............. 194
Automatic light control
system.................................... 192
AUX port ................................... 273
Auxiliary boxes ................ 380, 382
Back door ................................. 125
Back-up lights
Replacing light bulbs ............ 476
Wattage ................................ 560
Battery (12-volt battery)
Battery checking ................... 439
If the 12-volt battery is
discharged.......................... 538
Preparing and checking
before winter ...................... 263
Warning light......................... 490
Battery (traction battery) .......... 77
Bluetooth
®............................... 352
Audio system ........................ 321
Hands-free system
(for cellular phone) ............. 323
Registering/removing
a Bluetooth
® device ........... 315
Selecting a Bluetooth®
device ................................. 317
Wireless communication....... 310
B

606Alphabetical index
PRIUS v_OM_OM47B12U_(U)
Child-protectors....................... 123
Cleaning
Aluminum wheels.................. 407
Exterior ................................. 406
Interior................................... 410
Panoramic roof ..................... 409
Radar sensor ................ 226, 258
Seat belts .............................. 411
Climate remote control ........... 371
Clock ................................... 92, 386
Condenser ................................ 433
Console box ............................. 377
Coolant
Capacity ................................ 557
Checking ............................... 431
Preparing and checking
before winter....................... 263
Cooling system ........................ 431
Hybrid system overheating ... 543
Consumption screen ............... 108
Cruise control
Cruise control........................ 210
Dynamic radar cruise
control................................. 214
Warning messages ............... 506
Cup holders.............................. 378
Curtain shield airbags ............... 41
Customizable features ............ 575Daytime running light
system.................................... 192
Defogger
Outside rear view mirrors ..... 366
Rear window ......................... 366
Windshield ............................ 366
Dimension ................................ 552
Dinghy towing.......................... 173
Display
Drive information .................. 102
Dynamic radar cruise
control ................................ 214
Energy monitor ............. 102, 108
LDA (Lane Departure
Alert)................................... 227
Multi-information display ....... 100
Trip information....................... 94
Warning messages ............... 503
Do-it-yourself maintenance .... 419
Door courtesy lights ............... 373
Location ................................ 373
Wattage ................................ 560D