Page 543 of 704
519
4-3. Do-it-yourself maintenance
PRIUS PHV_OM_OM47787U_(U)
4
Maintenance and care
■License plate lights
Open the back door and remove
the cover.
To p r e v e n t d a m a g e , c o v e r t h e t i p
of the screwdriver with a rag.
Turn the bulb base counterclock-
wise.
Remove the light bulb.
When installing, reverse the steps listed.
STEP 1
ITO43P149
STEP 2
ITO43P150
STEP 3
STEP 4
Page 544 of 704

520
4-3. Do-it-yourself maintenance
PRIUS PHV_OM_OM47787U_(U)
■Replacing the following bulbs
If any of the lights listed below has burnt out, have it replaced by
your Toyota dealer.
●Headlight low beams (LED headlights)
●Parking lights (LED headlights)
●St op lights
●Ta i l l i g h t s
●High mounted stoplight
●Daytime running lights (except for Canada)
■LED lights
The headlight low beams (LED headlights), parking lights (LED headlights),
stop lights, tail lights, high mounted stoplight and daytime running lights
(except for Canada) consist of a number of LEDs. If any of the LEDs burn
out, take your vehicle to your Toyota dealer to have the light replaced.
■Condensation build-up on the inside of the lens
Contact your Toyota dealer for more information in the following situations.
Te m p o r a r y c o n d e n s a t i o n b u i l d - u p o n t h e i n s i d e o f t h e h e a d l i g h t l e n s d o e s
not indicate a malfunction.
●Large drops of water have built up on the inside of the lens.
●Water has built up inside the headlight.
■When replacing light bulbs
→P. 5 0 5
Page 545 of 704
521
4-3. Do-it-yourself maintenance
PRIUS PHV_OM_OM47787U_(U)
4
Maintenance and care
CAUTION
■Replacing light bulbs
●Be sure to stop the hybrid system and turn off the lights. Do not attempt to
replace the bulb immediately after turning off the lights.
The bulbs become very hot and may cause burns.
●Do not touch the glass portion of the light bulb with bare hands. Hold the
bulb by the plastic or metal portion.
If the bulb is scratched or dropped, it may blow out or crack.
●Fully install light bulbs and any parts used to secure them. Failure to do so
may result in heat damage, fire, or water entering the headlight unit. This
may damage the headlights or cause condensation to build up on the lens.
■To p r e v e n t d a m a g e o r f i r e
Make sure bulbs are fully seated and locked.
Page 547 of 704
524
PRIUS PHV_OM_OM47787U_(U)
5-1. Essential information
Emergency flashers
■Emergency flashers
If the emergency flashers are used for a long time while the hybrid system is
not operating (while the “READY” indicator is not illuminated), the 12-volt
battery may discharge.
The emergency flashers are used to warn other drivers when the
vehicle has to be stopped in the road due to a breakdown, etc.
Press the switch.
All the turn signal lights will
flash.
To t u r n t h e m o f f , p r e s s t h e
switch once again.
Page 556 of 704

5
When trouble arises
533
PRIUS PHV_OM_OM47787U_(U)
5-2. Steps to take in an emergency
If a war ning light tur ns on or a war ning buzzer sounds
Stop the vehicle immediately. Continuing to drive the vehicle
may be dangerous.
The following warning indicates a possible problem in the brake sys-
tem. Immediately stop the vehicle in a safe place and contact your
To y o t a d e a l e r .
*:Parking brake engaged warning buzzer:
A buzzer will sound if the vehicle is driven at a speed of approximately 3 mph
(5 km/h) or more.
Warning lightWarning light/Details
(U.S.A.)
(Canada)
Brake system warning light and warning buzzer (red
indicator)*
•Low brake fluid
•Malfunction in the brake system
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.
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.
Page 565 of 704

542
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47787U_(U)
■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 turned to ON mode, have it
checked by your Toyota dealer.
■Customization
The vehicle speed linked seat belt reminder buzzer can be disabled.
(Customizable features →P. 6 3 9 ) H o w e v e r , To y o t a r e c o m m e n d s t h a t t h e
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 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.
Page 587 of 704
564
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47787U_(U)
MessageDetailsCorrection
procedure
Charging has been
stopped because of the
high energy consumption
of electrical compo-
nents, such as the head-
lights.
Switch the electrical
appliance OFF, and
restart charging by fol-
lowing the procedure on
P. 8 0 .
If the message is still
displayed, the 12-volt
battery may have a low
charge.
In this event, turn the
“POWER” switch OFF
approximately 15 min-
utes after starting the
hybrid system, and
restart charging.
Charging has been
stopped because of
extremely low voltage,
possibly caused by the
plug not being inserted
correctly.
Check that the plug is
inserted correctly, and
restart charging by fol-
lowing the procedure on
P. 8 0 .
Check that the plug is
not connected to a
power strip and that an
extension cord, multi-
outlet etc. is not being
used.
Page 611 of 704

588
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47787U_(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 other posi-
tion.
■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.