warning light TOYOTA PRIUS PLUS 2012 Owner's Guide

5
477 5-2. Steps to take in an emergency
When trouble arises
PRIUS +_OM_OM47821E_(EE)
*1: Open door warning buzzer:
The open door warning buzzer sounds to alert one or more of the doors is
not fully closed (with the vehicle having reached a speed of 5km/h [3 mph]).
*2: Seat belt warning buzzer:
The seat belt reminder sounds to alert the driver, front passenger and rear
passengers that his or her seat belt is not fastened. The buzzer sounds
intermittently for 30 seconds after the vehicle has reached a speed of at
least 20 km/h (12 mph). Then, if the seat belt is still unfastened, the buzzer
will sound in a different tone for 90 more seconds.
Warning lightWarning light/DetailsCorrection procedure
Driver’s and front passenger’s
seat belt reminder light (warn-
ing buzzer)
*2
Warns the driver and/or front
passenger to fasten their seat
belts.Fasten the driver’s
and/or front passen-
ger’s seat belt.
If the front passen-
ger’s seat is occu-
pied, the front
passenger’s seat
belt also needs to
be fastened to
make the reminder
light (warning
buzzer) off.
Rear passengers’ seat belt
reminder light (warning
buzzer)
*2
Warn the rear passengers to
fasten their seat belts. Fasten the seat belt.

478 5-2. Steps to take in an emergency
PRIUS +_OM_OM47821E_(EE)
Electric power steering system warning light (warning buzzer)
When the 12-volt battery charge becomes insufficient or the voltage tempo-
rarily drops, the electric power steering system warning light may come on
and the warning buzzer sounds.
If the malfunction indicator lamp comes on while driving
The malfunction indicator lamp will come on if the fuel tank becomes com-
pletely empty. If the fuel tank is empty, refuel the vehicle immediately. The
malfunction indicator lamp will go off after several trips.
Customization
The vehicle speed linked seat belt reminder buzzer can be disabled.
(Customizable features P. 554) However, Toyota recommends that the
seat belt reminder buzzer be operational to alert the driver and front passen-
ger when seat belts are not fastened.
CAUTION
If both the ABS and the brake system warning lights remain on
Stop your vehicle in a safe place immediately and contact any authorized
Toyota dealer or repairer, or another duly qualified and equipped profes-
sional. 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.

5
479 5-2. Steps to take in an emergency
When trouble arises
PRIUS +_OM_OM47821E_(EE)
Follow the correction procedures.
After taking the specified steps to correct the suspected problem,
check that the warning light turn off.
Interior
buzzerExterior
buzzerWarning
lightDetailsCorrection procedure
Once
The electronic key
is not detected
when an attempt
is made to start
the hybrid system.
Start the hybrid sys-
tem with the electronic
key present.
The “POWER”
switch has been
pressed while the
electronic key
was not detected
inside the vehicle.
Confirm the location
of the electronic key.
(P. 67, 74)
If the warning light
does not extinguish
even though the elec-
tronic key is within
operating range,
touch the electronic
key to the “POWER”
switch while depress-
ing the brake pedal
(P. 520)
Transmission
between the elec-
tronic key and the
vehicle is being
blocked, or the bat-
tery in the electronic
key has been
depleted.

480 5-2. Steps to take in an emergency
PRIUS +_OM_OM47821E_(EE)
Interior
buzzerExterior
buzzerWarning
lightDetailsCorrection
procedure
Once
Driving has been
started without the
correct electronic
key inside the
vehicle.
Confirm the location
of the electronic key.
Once3 times
The electronic key
was carried out-
side the vehicle
and a door other
than the driver’s
door was opened
and closed while
the “POWER”
switch was in a
mode other than
off.
Bring the electronic
key back into the vehi-
cle.
The electronic key
was carried out-
side the vehicle
and the driver’s
door was opened
and closed while
the shift position P
was selected
without turning off
the “POWER”
switch.
Turn the “POWER”
switch off or bring the
electronic key back
into the vehicle.

5
481 5-2. Steps to take in an emergency
When trouble arises
PRIUS +_OM_OM47821E_(EE)
Interior
buzzerExterior
buzzerWarning
lightDetailsCorrection
procedure
Contin-
uous
An attempt was
made to exit the
vehicle with the
electronic key and
lock the doors
without first turn-
ing the “POWER”
switch off.
Turn the “POWER”
switch off and lock the
doors again.
Contin-
uousContin-
uous
The electronic key
was carried out-
side the vehicle
and the driver’s
door was opened
and closed while
any shift position
other than P was
selected without
turning off the
“POWER” switch.
• Shift the shift position
to P.
• Bring the electronic
key back into the vehi-
cle.

528
5-2. Steps to take in an emergency
PRIUS +_OM_OM47821E_(EE)
If your vehicle overheats
Correction procedures
If the high coolant temperature warning light comes on or
flashes
Stop the vehicle in a safe place and turn off the air condition-
ing system, and then stop the hybrid system.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
The following may indicate that your vehicle is overheating.
The high coolant temperature warning light (P. 470) comes on
or flashes, or a loss of hybrid system power is experienced. (For
example, the vehicle speed does not increase.)
The hybrid system overheat warning light (P. 475) comes on.
Steam comes out from under the hood.
STEP 1
STEP 2

5
531 5-2. Steps to take in an emergency
When trouble arises
PRIUS +_OM_OM47821E_(EE)If the hybrid system overheat warning light comes on
Stop the vehicle in a safe place.
Stop the hybrid system and carefully lift the hood.
After the hybrid system has
cooled down, inspect the hoses
and radiator core (radiator) for
any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact any autho-
rized Toyota dealer or repairer, or
another duly qualified and
equipped professional.
STEP 1
STEP 2
STEP 3

532 5-2. Steps to take in an emergency
PRIUS +_OM_OM47821E_(EE)The coolant level is satisfactory if
it is between the “F” and “L” lines
on the reservoir.
Reservoir
“F”
“L”
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
Start the hybrid system and check for the instrument cluster.
If the hybrid system overheat warning light does not turn off:
Stop the hybrid system and contact any authorized Toyota
dealer or repairer, or another duly qualified and equipped
professional.
If the hybrid system overheat warning light does not come on:
Have the vehicle inspected at the nearest any authorized
Toyota dealer or repairer, or another duly qualified and
equipped professional.
STEP 4
STEP 5
STEP 6

563
PRIUS +_OM_OM47821E_(EE)
Alphabetical index
Alphabetical index
A/C
Air conditioning filter.............. 427
Automatic air conditioning
system ................................ 326
ABS ........................................... 298
Air conditioning filter .............. 427
Air conditioning system
Air conditioning filter.............. 427
Automatic air conditioning
system ................................ 326
Steering wheel climate
remote control switches ...... 339
Airbags
Airbag operating
conditions ........................... 161
Airbag precautions for your
child .................................... 165
Airbag warning light .............. 471
Curtain shield airbag operating
conditions ........................... 162
Curtain shield airbag
precautions ......................... 165
General airbag precautions... 165
Knee airbag........................... 158
Locations of airbags .............. 158
Modification and disposal of
airbags ................................ 170
Proper driving posture........... 156
Side airbag operating
conditions ........................... 162
Side airbag precautions ........ 165
Side and curtain shield airbags
operating conditions ........... 162
Side and curtain shield airbags
precautions ......................... 165
SRS airbags .......................... 158Antenna .................................... 385
Anti-lock brake system ........... 298
Assist grips .............................. 374
Audio input
*
Audio remote control
switches
*
Audio system*......................... 342
Audio/video system
*.............. 342
Automatic air conditioning
system
Air conditioning filter ............. 427
Air conditioning system ......... 326
Automatic air conditioning
system ................................ 326
Steering wheel climate
remote control switches...... 339
Automatic headlight leveling
system .................................... 265
Automatic light control
system .................................... 261
AUX port
*
Auxiliary box .................... 358, 378
Back door
Back door................................ 97
Smart entry & start system ..... 64
Wireless remote control .......... 92
Back-up lights
Replacing light bulbs............. 445
Wattage ................................ 551
Battery
Checking ............................... 413
If the 12-volt battery is
discharged .......................... 522
Preparing and checking
before winter....................... 319
A
B
*: Refer to ““touch screen” Owner’s Manual”
or “Navigation System Owner’s Manual”.

565 Alphabetical index
PRIUS +_OM_OM47821E_(EE)
Daytime running light
system .................................... 263
Deck board ............................... 377
Defogger
Rear window ......................... 341
Side mirrors........................... 341
Dimensions .............................. 540
Display
Dynamic radar cruise
control ................................. 280
Head-up display .................... 253
Trip information ..................... 241
Do-it-yourself maintenance .... 393
Door lock
Back door ................................ 97
Side doors ............................... 94
Smart entry & start system...... 64
Wireless remote control .......... 92
Door pockets ............................ 360
Doors
Back door ................................ 97
Door glasses ......................... 135
Door lock ..................... 64, 92, 94
Rear door child-protector ........ 95
Side doors ............................... 94
Driver’s seat belt reminder
light ......................................... 477
Driving
Break-in tips .......................... 203
Correct posture ..................... 156
Procedures............................ 202
Winter driving tips ................. 319Eco drive mode switch............ 226
Electric power steering ........... 298
Electronic key
If the electronic key does not
operate properly ................. 519
Replacing battery .................. 430
Emergency, in case of
If a warning buzzer
sounds ................................ 469
If a warning light turns on...... 469
If the electronic key does not
operate properly ................. 519
If the hybrid system will not
start .................................... 516
If the 12-volt battery is
discharged .......................... 522
If you have a flat tire .... 482, 494
If you lose your keys ............. 518
If you think something is
wrong.................................. 468
If your vehicle becomes
stuck ................................... 534
If your vehicle has to be
stopped in an
emergency.......................... 536
If your vehicle needs to be
towed .................................. 461
If your vehicle overheats ....... 528
Emergency flashers
Switch ................................... 460
Emergency tire puncture
repair kit ................................. 494DE
*: Refer to ““touch screen” Owner’s Manual”
or “Navigation System Owner’s Manual”.