2023 TOYOTA PRIUS PRIME ECU

341-1. For safe use
Move the height adjuster up and
down as needed until you hear a
click.
When the vehicle is subjected to
a severe frontal or side impact
or rollover, the pretensioners
retract the seat belts of the front
seats and rear outer seats to
securely restrain the occupants.
The pretensioners will not operate
in minor frontal or side impacts, or
rear impacts.
■Replacing the belt after the pre-
tensioner has been activated
If the vehicle is in volved in multiple collisions, the pretensioner will acti-
vate for the first collision, but will not
activate for the second or subse-
quent collisions.
■PCS-linked control
If the PCS (Pre-Collision System)
determines that th e possibility of a
collision with a vehicle is high, the
seat belt pretensioners will be pre-
pared to operate.WARNING
■Adjustable shoulder anchor
Always make sure the shoulder
belt is positioned across the cen-
ter of your shoulder. The belt
should be kept away from your
neck, but not falling off your
shoulder. Failure to do so could
reduce the amount of protection in
an accident and cause death or
serious injuries in the event of a
sudden stop, sudden swerve or
accident.
Seat belt pretensioners
(front seats and outboard
rear seats)
WARNING
■Seat belt pretensioners
Observe the following precautions
to reduce the risk of injury in the
event of sudden braking or an
accident.
Failure to do so may result in
death or serious injury.
●Do not place anything, such as
a cushion, on the front passen-
ger’s seat. Doing so will
disperse the passenger’s
weight, which prevents the sen-
sor from detecting the passen-
ger’s weight properly. As a
result, the seat belt pretensioner
for the front passenger’s seat
may not operate in the event of
a collision.
●If a pretensioner has operated,
the SRS warning light will illumi-
nate. In this situation, the seat
belt cannot be used and must
be replaced by your Toyota
dealer.

351-1. For safe use
1
For safety and security
■Location of the SRS airbagsSRS driver airbag/front passenger airbag
Help reduce impact to the head and chest of the driver and front passenger
SRS side airbags
• Help reduce impact to the chest of the occupants of the front seats
• Help reduce impact to the chest of th e occupants of the rear outer seats
SRS curtain shield airbags
• Help reduce impact to the heads of the occupants of the front and rear
outer seats
• Can help prevent the occupants from being thrown from the vehicle in the event of a vehicle rollover
SRS airbags
The SRS airbags deploy when the vehicle is subjected to cer-
tain types of severe impact that may cause significant injury
to the occupants. The airbags work together with the seat
belts to help reduce the risk of death or serious injury.
SRS airbag system
A
B
C

371-1. For safe use
1
For safety and security
bag sensor assembly (ECU) controls airbag deployment based on
information obtained from the sensors, etc., shown in the system
components diagram above. This information includes crash sever-
ity and occupant information. As the airbags deploy, a chemical
reaction in the inflators quickly fills the airbags with non-toxic gas to
help restrain the motion of the occupants.
■If the SRS airbags deploy
(inflate)
●Slight abrasions, burns, bruising,
etc., may be sustained from SRS
airbags, due to the extremely high
speed of deployment (inflation) by
hot gases.
●A loud noise and white powder will
be emitted.
●Parts of the airbag module (steer-
ing wheel hub, airbag cover and
inflator) as well as the parts
around the airbags may be hot for
several minutes. The airbag itself
may also be hot.
●The windshield may crack.
●The hybrid system will be stopped
and fuel supply to the engine will
be stopped. (P.87)
●The brakes and st op lights will be
controlled automatically.
(  P.425)
●The interior lights will turn on auto-
matically. ( P.446)
●The emergency flashers will turn
on automatically. ( P.546)
●For Safety Connect subscribers, if
any of the following situations
occur, the system is designed to
send an emergency call to the
response center, notifying them of
the vehicle’s location (without
needing to push the “SOS” button)
and an agent will a ttempt to speak
with the occupants to ascertain
the level of emergency and assis-
tance required. If the occupants
are unable to communicate, the
agent automatically treats the call
as an emergency and helps to dis-
patch the necessary emergency services. (
P.65)
• When an SRS airbag has been deployed
• When a seat belt pretensioner has
operated
• When the vehicle has been involved in a severe rear-end colli-
sion
■The SRS airbags deploy in a
frontal impact when
●The following SRS airbags will
deploy in the event of an impact
that exceeds a threshold level
(level of force corresponding to an
approximately 12 - 18 mph [20 -
30 km/h] frontal collision with a
fixed wall that does not move or
deform):
• SRS front airbags
●The threshold level at which the
SRS airbags will deploy will be
higher than normal in the in the
following situations:
• When the vehicle collides with an
object, such as a parked vehicle
or sign pole, which moves or
deforms on impact
• If the vehicle is involved in an underride collision, such as a colli-
sion in which the front of the vehi-
cle underrides, or goes under, the
bed of a truck
●Depending on the type of collision,
only the following may deploy:
• Seat belt pretensioners
●The SRS airbags for the front pas-
senger’s seat will not deploy if
there is no passenger in the front
passenger seat. However, the
SRS airbags for the front passen-
ger’s seat may deploy, even if the
seat is unoccupied, if luggage is
put on the seat.

391-1. For safe use
1
For safety and security
●The following SRS airbags will not
normally deploy in rear collisions,
end over end vehicle rollovers, or
low speed front or side collisions:
• SRS curtain shield airbags
■When to contact your Toyota
dealer
In the following situations, the vehi-
cle will require inspection and/or
repair. Contact your Toyota dealer
as soon as possible.
●When any of the SRS airbags
have been deployed
●When the front of the vehicle is
damaged or deformed, or was
involved in a collision that was not
severe enough to cause any of
the following SRS airbags to
deploy:
• SRS front airbags
●When a door or its surrounding
area is damaged, deformed or has
had a hole made in it, or was
involved in a collision that was not severe enough to cause any of
the following SRS airbags to
deploy:
• SRS side airbags
• SRS curtain shield airbags
●When the pad section of the steer-
ing wheel or the dashboard near
the front passenger SRS airbag is
scratched, cracked, or otherwise
damaged.
●When the surface of a seat with
an SRS side airbag is scratched,
cracked, or otherwise damaged.
●When the part of a front pillar, rear
pillar or roof side rail garnish (pad-
ding) which covers a SRS curtain
shield airbag is scratched,
cracked, or otherwise damaged.

411-1. For safe use
1
For safety and security
WARNING
●The SRS front passenger air-
bag deploys with considerable
force, and can cause death or
serious injury, especially if the
front passenger is very close to
the airbag. The front passenger
seat should be positioned as far
possible from the airbag with
the seatback adjusted so that
the passenger is sat upright.
●Improperly seated and/or
restrained infants and children
can be killed or seriously injured
by a deploying airbag. An infant
or child who is too small to use
a seat belt should be properly
secured using a child restraint
system. Toyota strongly recom-
mends that all infants and chil-
dren be placed in the rear seats
of the vehicle and properly
restrained. The rear seats are
safer for infants and children
than the front passenger seat.
(  P.51)
●Do not sit on the edge of the
seat or lean against the dash-
board.
●Do not allow a child to stand in
front of the SRS front passenger
airbag or sit on the lap of a front
passenger.
●Front seat occupants should
never hold items on their lap.
●Do not lean against the door,
roof side rail, or front, side, or
rear pillar.
●Do not allow anyone to kneel on
a seat toward the door or put
their head or hands outside the
vehicle.
●Do not attach anything to or
lean anything against areas
such as the dashboard or steer-
ing wheel pad.

431-1. For safe use
1
For safety and security
WARNING
• Front door trim
• Front door speakers
●Modifications to the front door
panels (such as making holes in
them)
●Repair or modification of the fol-
lowing parts or their surrounding
• Front fender
• Front bumper
• Sides of the vehicle interior
●Installation of the following parts
or accessories
• Bull bars or kangaroo bars
• Snow plows
• Winches
• Roof luggage carriers
●Modifications to the vehicle’s
suspension
●Installation of electronic devices
such as mobile two-way radios
(RF-transmitter) and CD players
●Modifications to your vehicle for
a person with a physical disabil-
ity

451-1. For safe use
1
For safety and security
WARNING
●Make sure the “PASSENGER
AIR BAG OFF” indicator light is
not illuminated when using the
seat belt extender for the front
passenger seat. If the “PAS-
SENGER AIR BAG OFF” indi-
cator light is illuminated,
disconnect the extender tongue
from the seat belt buckle, and
reconnect the seat belt. Recon-
nect the seat belt extender after
making sure the “PASSENGER
AIR BAG ON” indicator light is
illuminated. If you use the seat
belt extender while the “PAS-
SENGER AIR BAG OFF” indi-
cator light is illuminated, the
SRS airbags for the front pas-
senger will not activate, which
could cause death or serious
injury in the event of a collision.
●Do not apply a heavy load to the
front passenger seat or equip-
ment (e.g. se atback pocket).
●Do not put weight on the front
passenger seat by putting your
hands or feet on the front pas-
senger seat seatback from the
rear passenger seat.
●Do not let a rear passenger lift
the front passenger seat with
their feet or press on the seat-
back with their legs.
●Do not put objects under the
front passenger seat.
●Do not recline the front passen-
ger seatback so far that it
touches a rear seat. This may
cause the “PASSENGER AIR
BAG OFF” indicator light to be
illuminated, which indicates that
the SRS airbags for the front
passenger will not activate in
the event of a severe accident.
If the seatback touches the rear
seat, return th e seatback to a
position where it does not touch
the rear seat. Keep the front
passenger seatback as upright
as possible when the vehicle is
moving. Reclining the seatback
excessively may lessen the
effectiveness of the seat belt
system.
●If an adult sits in the front pas-
senger seat, the “PASSENGER
AIR BAG ON” indicator light is
illuminated. If the “PASSEN-
GER AIR BAG OFF” indicator is
illuminated, ask the passenger
to sit up straight, well back in
the seat, feet on the floor, and
with the seat belt worn correctly.
If the “PASSENGER AIR BAG
OFF” indicator still remains illu-
minated, either ask the passen-
ger to move to the rear seat, or
if that is not possible, move the
front passenger seat fully rear-
ward.
●When it is unavoidable to install
a forward-facing child restraint
system on the front passenger
seat, install the child restraint
system on the front passenger
seat in the proper order.
(  P.53)
●Do not modify or remove the
front seats.

471-1. For safe use
1
For safety and security
■Child*4
■Child restraint system with infant*5
■Unoccupied
Indicators/warn-ing lights
“PASSENGER AIR BAG ON” and
“PASSENGER AIR BAG OFF” indica- tor lights“PASSENGER
AIR BAG OFF” or “PASSENGER
AIR BAG ON”
*4
SRS warning lightOff
Driver’s and front passenger’s seat belt reminder lightOff*2 or flashing*3
DevicesFront passenger airbagDeactivated or
activated
*4
Indicators/warn- ing lights
“PASSENGER AIR BAG ON” and
“PASSENGER AIR BAG OFF” indica- tor lights“PASSENGER
AIR BAG OFF”
*6
SRS warning lightOff
Driver’s and front passenger’s seat belt reminder lightOff*2 or flashing*3
DevicesFront passenger airbagDeactivated
Indicators/warn-ing lights
“PASSENGER AIR BAG ON” and
“PASSENGER AIR BAG OFF” indica- tor lights“PASSENGER
AIR BAG OFF”
SRS warning light
OffDriver’s and front passenger’s seat belt reminder light
DevicesFront passenger airbagDeactivated