Page 496 of 621

4958-2. Steps to take in an emergency
PRIUS v_OM_OM47887U_(U)
8
When trouble arises
■When the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level. Push-
ing the tire pressure warning reset switch will not turn off the tire pressure
warning light.
■The tire pressure warning light may come on due to natural causes
The tire pressure warning light may come on due to natural causes such
as natural air leaks and tire inflation pressure changes caused by temper-
ature. In this case, adjusting the ti re inflation pressure will turn off the
warning light (after a few minutes).
■When a tire is replaced with a spare tire
The compact spare tire is not equipped with a tire pressure warning valve
and transmitter. If a tire goes flat, the tire pressure warning light will not
turn off even though the flat tire has been replaced with the spare tire.
Replace the spare tire with the repaired tire and adjust the tire inflation
pressure. The tire pressu re warning light will go off after a few minutes.
■If the tire pressure warning system is not functioning
P. 4 4 6
■If the tire pressure warning light frequently comes on after blinking
for 1 minute
If the tire pressure warning light frequently comes on after blinking for
1 minute when the power switch is tu rned to ON mode, have it checked
by your Toyota dealer.
■ Warning buzzer
In some cases, the buzzer may not be heard due to being in a noisy location
or audio sound.
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4968-2. Steps to take in an emergency
PRIUS v_OM_OM47887U_(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 steerin g system warning light comes on
The steering wheel may become extremely heavy.
If the steering wheel becomes heavie r 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 th e 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.
Page 498 of 621

4978-2. Steps to take in an emergency
PRIUS v_OM_OM47887U_(U)
8
When trouble arises
WARNING
■Maintenance of the tires
Each tire, including the spare (if provided), should be checked monthly
when cold and inflated to the inflation pressure recommended by the
vehicle manufacturer on the vehicle placard or tire inflation pressure
label (tire and load information label). (If your vehicle has tires of a dif-
ferent size than the size indicated on the vehicle placard or tire inflation
pressure label [tire and load information label], you should determine
the proper tire inflation pressure for those tires.)
As an added safety feature, your vehicle has been equipped with a tire
pressure monitoring system (TPMS-ti re pressure warning system) that
illuminates a low tire pre ssure telltale (tire pressure warning light) when
one or more of your tires is significantly under-inflated. Accordingly,
when the low tire pressure telltale (tire pressure warning light) illumi-
nates, you should stop and check your tires as soon as possible, and
inflate them to the proper pressure. Driving on a significantly under-
inflated tire causes the tire to overheat and can lead to tire failure.
Under-inflation also reduces fuel effi ciency and tire tread life, and may
affect the vehicle’s hand ling and stopping ability.
Please note that the TPMS (tire pres sure warning system) is not a sub-
stitute for proper ti re maintenance, and it is the driver’s responsibility to
maintain correct tire pressure, even if under-inflation has not reached
the level to trigger illumina tion of the TPMS low tire pressure telltale (tire
pressure warning light).
Your vehicle has also been equipped with a TPMS (tire pressure warn-
ing system) malfunction indicator to indicate when the system is not
operating properly. The TPMS (tire pressure warning system) malfunc-
tion indicator is combined with the lo w tire pressure telltale (tire pressure
warning light). When the system dete cts a malfunction, the telltale will
flash for approximately one minute and then remain continuously illumi-
nated. This sequence will continue up on subsequent vehicle start-ups
as long as the malfunction exists. When the malfunction indicator is illu-
minated, the system may not be able to detect or signal low tire pres-
sure as intended.
TPMS (tire pressure warning system) malfunctions may occur for a vari-
ety of reasons, including the installati on of replacement or alternate tires
or wheels on the vehicle that prevent the TPMS (tire pressure warning
system) from functioning properly. Always check the TPMS (tire pres-
sure warning system) malfunction te lltale after replacing one or more
tires or wheels on your vehicle to ensure that the replacement or alter-
nate tires and wheels allow the TPMS (tire pressure warning system) to
continue to function properly.
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4998-2. Steps to take in an emergency
PRIUS v_OM_OM47887U_(U)
8
When trouble arises
After taking the specified steps to correct the suspected problem,
check that the warning light turn off.
Follow the correction procedures. (vehicles without multi-infor-
mation display)
InteriorbuzzerExterior buzzerWarning lightDetailsCorrection procedure
Once
The electronic key
is not detected
when an attempt
is made to start
the hybrid system.
Start the hybrid system
with the electronic key
present.
The power switch
has been pressed
while the elec-
tronic key was not
detected inside
the vehicle.
Confirm the location of
the electronic key.
(P. 130)
If the warning light does
not extinguish even
though the electronic
key is within operating
range, touch the elec-
tronic key to the power
switch while depressing
the brake pedal
(P. 534)
Transmission
between the elec-
tronic key and the
vehicle is being
blocked, or the bat-
tery in the electronic
key has been
depleted.
Once
Driving has been
started without
the correct elec-
tronic key inside
the vehicle.
Confirm the location of
the electronic key.
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5008-2. Steps to take in an emergency
PRIUS v_OM_OM47887U_(U)
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 vehicle.
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 elec-
tronic key back into the
vehicle.
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
vehicle.
InteriorbuzzerExterior buzzerWarning lightDetailsCorrection procedure
Page 502 of 621
501
PRIUS v_OM_OM47887U_(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 a warning is shown on the multi-information display, stay calm
and perform the following actions:
1
2
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5068-2. Steps to take in an emergency
PRIUS v_OM_OM47887U_(U)
*: Refer to the separate “Scheduled Maintenance Guide” or “Owner’s ManualSupplement” 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. 412)
(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. 247)
(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)
Page 511 of 621
5108-2. Steps to take in an emergency
PRIUS v_OM_OM47887U_(U)
Shift control system communication malfunctionA 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. 182) 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.
(If equipped)
Indicates a malfunction in the LED headlight sys-
tem A buzzer also sounds.
Have the vehicle inspected by your Toyota
dealer.
Warning messageDetails/Actions
(Turns on or
Flashes)