2012 TOYOTA PRIUS PLUG-IN key battery

5
When trouble arises
561
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47818U_(U)
Interior
buzzer
Exterior
buzzerWarning messageDetailsCorrection
procedure
Once⎯
(Flashes)
The elec-
tronic key
does not
operate
properly.
→P. 5 9 1
⎯⎯
Power
was
turned off
due to
the auto-
matic
power off
function.
Next time when
starting the
hybrid system,
increase the
engine speed
slightly and
maintain that
level for approxi-
mately 5 min-
utes to charge
the battery.
NOTICE
■While the engine oil level warning is displayed
Continued engine operation with low engine oil will damage the engine.
■Engine oil maintenance message
The warning message is based on the projected driving range after engine
oil maintenance message is reset.
The system does not monitor the purity of the engine oil.

588
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47818U_(U)
If the hybrid system will not start
Reasons for the hybrid system not starting vary depending on the
situation. Check the following and perform the appropriate proce-
dure:
■The hybrid system will not start even though the correct
starting procedure is being followed (→P. 2 3 8 )
One of the following may be the cause of the problem:
●The charging cable may be attached to the vehicle. (→P. 9 1 )
●The electronic key may not be functioning properly.*
(→P. 5 9 1 )
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
●There may be a malfunction in the immobilizer system.*
(→P. 1 7 9 )
●There may be a malfunction in the P position control system.*
(→P. 2 4 3 , 5 4 8 )
*: It may not be possible to shift the shift position from P to another
position.
■The interior lights and headlights are dim, or the horn does
not sound or sounds at a low volume
One of the following may be the cause of the problem:
●The 12-volt battery may be discharged. (→P. 5 9 4 )
●The 12-volt battery terminal connections may be loose or cor-
roded.

5
When trouble arises
591
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47818U_(U)
If the electronic key does not operate properly
Locking and unlocking the doors
Use the mechanical key (→P. 1 0 5 )
in order to perform the following
operations:
Locks all the doors
Unlocks the door
Turning the key rearward unlocks
the driver’s door. Turning the key
once again within 3 seconds
unlocks the other doors.
If communication between the electronic key and vehicle is inter-
rupted (→P. 1 1 9 ) o r t h e e l e c t r o n i c k e y c a n n o t b e u s e d b e c a u s e t h e
battery is depleted, the smart key system and wireless remote con-
trol cannot be used. In such cases, the doors can be opened and the
hybrid system can be started by following the procedure below.
ITO52P121

5
When trouble arises
593
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47818U_(U)
■Stopping the hybrid system
Set the parking brake, shift the shift position to P and press the “POWER”
switch as you normally do when stopping the hybrid system.
■Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the
electronic key battery be replaced immediately when the battery is depleted.
(→P. 4 9 3 )
■Changing “POWER” switch modes
Within 10 seconds of the buzzer sounding, release the brake pedal and
press the “POWER” switch.
The hybrid system does not start and modes will be changed each time the
switch is pressed. (→P. 2 4 0 )

669
Alphabetical index
PRIUS PHV_OM_OM47818U_(U)
Back door
Back door ............................. 140
Smart key system ................. 108
Wireless remote control........ 132
Back-up lights
Replacing light bulbs ............ 507
Wattage ................................ 620
Battery
Checking .............................. 471
If the 12-volt battery is
discharged ......................... 594
Preparing and checking
before winter ...................... 349
Bluetooth®*
Bottle holders .......................... 390
Brake
Fluid...................................... 619
Parking brake ....................... 255
Brake assist ............................. 328
Break-in tips ............................ 226
Brightness control
Instrument panel light
control ................................ 260
Camera*
Care
Exterior ..................................424
Interior ...................................428
Seat belts ..............................429
Cargo capacity .........................348
Cargo hooks .............................403
CD player*
Chains .......................................351
Charging
Charging cable ........................74
Charging equipment ................73
Charging messages ..............562
Charging precautions ..............94
Charging procedure ................80
Charging timer function ...........86
Charging time will
increase when.......................93
High voltage components........44
Information related to
charging display ....................89
Maintenance..........................103
Power sources precautions .....79
Power sources that can be
used ......................................77
Safety functions.................75, 91
When charging cannot be
carried out .............................98
BC
*: Refer to “Display Audio System Owner’s Manual”
or “Navigation System Owner’s Manual”.

670
Alphabetical index
PRIUS PHV_OM_OM47818U_(U)
Child restraint system
Booster 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_OM47818U_(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....................................524
DE
*: Refer to “Display Audio System Owner’s Manual”
or “Navigation System Owner’s Manual”.

675
Alphabetical index
PRIUS PHV_OM_OM47818U_(U)
Odometer ................................. 257
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 Conditioning
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”.