sensor TOYOTA YARIS 2020 (in English) User Guide
[x] Cancel search | Manufacturer: TOYOTA, Model Year: 2020, Model line: YARIS, Model: TOYOTA YARIS 2020Pages: 572, PDF Size: 7.94 MB
Page 72 of 572

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YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
1-4. SRS Air Bags
WARNING
■Do not remove interior air bag parts
Removing  any  components  such  as  the  front  seats,  front  dashboar d,  the
steering  wheel  or  parts  on  the  front  and  rear  window  pillars  an d  along  the
roof  edge,  containing  air  bag  parts  or  sensors  is  dangerous.  Th ese  parts
contain  essential  air  bag  components.  The  air  bag  could  accidentally  acti-
vate  and  cause  serious  injuries.  Always  have  your  Toyota  dealer   remove
these parts.
■ Properly dispose of the air bag system
Improper  disposal  of  an  air  bag  or  a  vehicle  with  live  air  bags   in  it  can  be
extremely  dangerous.  Unless  all  safety  procedures  are  followed,   injury
could  result.  Have  your Toyota  dealer  safely  dispose  of  the  air  bag  system
or scrap an air bag equipped vehicle. 
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YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
1-4. SRS Air Bags
1
Essential Safety Equipment
Supplemental Restraint System Compo-
nents
Side and curtain inflators and air bags
Side crash sensors
Driver/Front passenger inflators and air bags
Air bag/seat belt pretensi oner system warning light ( P. 173)
Roll-over sensor, crash sensors,  and diagnostic module (SAS uni t) 
Front passenger air bag deac tivation indicator light (P.   8 3 )  
Front air bag sensors
Seat belt pretensioners ( P.   3 9 )
Front passenger occupant c lassification sensor (P.   8 2 )
Front passenger occupant  classification module1
2
3
4
5
6
7
8
9
10 
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YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
1-4. SRS Air Bags
How the SRS Air Bags Work
◆Front Seat Belt Pretensioners
The front seat belt pretensioners are designed to deploy in moder-
ate or severe frontal,  near frontal collisions.
In addition, the pretensioners o perate when a side collision or a roll-
over  accident  is  detected.  The  p retensioners  operate  differently
depending on what types of air bags are equipped. For more deta ils
about the seat belt pretensioner operation, refer to the SRS Ai r Bag
Deployment Criteria ( P.   7 8 ) .
◆Driver Air Bag
The driver’s air bag is mounted in the steering wheel.
When  air  bag  crash  sensors
detect  a  frontal  impact  of
greater  than  moderate  force,
the  driver’s  air  bag  inflates
quickly  helping  to  reduce  injury
mainly  to  the  driver’s  head  or
chest  caused  by  directly  hitting
the steering wheel.
For  more  details  about  air  bag  deployment,  refer  to  “SRS Air  Ba g
Deployment Criteria” ( P.   7 8 ) .
The  driver’s  dual-stage  air  bag  controls  air  bag  inflation  in  t wo
energy  stages.  During  an  impact  of  moderate  severity,  the  driver’s
air  bag  deploys  with  lesser  energy,  whereas  during  more  severe
impacts, it deploys  with more energy.
Your  Toyota  is  equipped  with  the  following  types  of  SRS  air
bags.  SRS  air  bags  are  designed  to  work  together  with  the  seat
belts  to  help  to  reduce  injuries  during  an  accident.  The  SRS  ai r
bags  are  designed  to  provide  further  protection  for  passengers
in addition to the seat belt functions. Be sure to wear seat be lts
properly. 
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YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
751-4. SRS Air Bags
1
Essential Safety Equipment
◆Front Passenger Air Bag
The  front  passenger  air  bag  is  mounted  in  the  front  passenger
dashboard.
The inflation mechanism for the
front  passenger  air  bag  is  the
same as the driver’s air bag, as
mentioned above.
For  more  details  about  air  bag
deployment,  refer  to  “SRS  Air
Bag Deployment Criteria” 
(  P. 78).
In addition, the front passenger air bag is designed to only de ploy in
accordance  with  the  total  seated  weight  on  the  front  passenger
seat.  For  details,  refer  to  the  front  passenger  occupant  classi fica-
tion system ( P.   8 2 ) .
◆Side Air Bags
The  side  air  bags  are  mounted  in  the  outboard  sides  of  the  fron t
seatbacks.
When the air bag crash sensors
detect  a  side  impact  of  greater
than  moderate  force,  the  sys-
tem  inflates  the  side  air  bag
only  on  the  side  in  which  the
vehicle  was  hit.  The  side  air
bag  inflates  quickly  to  reduce
injury  to  the  driver  or  front  pas-
senger’s  chest  caused  by
directly  hitting  interior  parts
such as a door or window.
For  more  details  about  air  bag  deployment,  refer  to  “SRS Air  Ba g
Deployment Criteria” ( P.   7 8 ) .
In  addition,  the  front  passenger  side  air  bag  is  designed  to  on ly
deploy  when  the  front  passenger  occupant  classification  sensor
detects  a  passenger  sitting  on  the  front  passenger’s  seat.  For
details,  refer  to  the  front  pas senger  occupant  classification  s ystem
(  P. 82). 
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YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
1-4. SRS Air Bags
◆Curtain Air Bags
The  curtain  air  bags  are  mounted  in  the  front  and  rear  window  pil-
lars, and the roof  edge along both sides.
When  the  air  bag  crash  sensors  detect  a  side  impact  of  greater
than moderate force, the curtain air bag inflates quickly and h elps to
reduce injury mainly to the rear outboard passenger’s head caus ed
by directly hitting interior p arts such as a door or window.
For  more  details  about  air  bag  deployment,  refer  to  “SRS Air  Ba g
Deployment Criteria” ( P.   7 8 ) .
In a side impact
Greater than moderate impact to one side of the vehicle will ca use
the curtain air  bag on that side only to inflate.
Only  one  side  curtain  air  bag
will  deploy  on  the  side  of  the
vehicle  that  receives  the  force
of an impact.
In a roll-over
In response to a vehicle roll-over , both curtain air bags inflate.
Both curtain air bags will deploy
after  the  roll-over  accident  is
detected. 
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YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
791-4. SRS Air Bags
1
Essential Safety Equipment
X: The SRS air bag equipment is designed to deploy in a collision.
*1:The front passenger front and side air bags and the seat belt pretensioner
are  designed  to  deploy  when  the  front  passenger  occupant  classi fication
sensor detects a passenger sitting on the front passenger’s sea t.
*2:In a side collision, the seat belt pretensioners and the side/curtain air bags
deploy.
*3:In a roll-over accident, the seat belt pretensioners and the cu rtain air bags
deploy.
In  a  frontal  offset  collision,  the  equipped  air  bags  and  preten sioners  may  all
deploy depending on the direction, angle, and rate of impact. 
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YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
1-4. SRS Air Bags
Front Passenger Occupant Classification 
System
Your  vehicle  is  equipped  with  a  f ront  passenger  occupant  classifica-
tion  sensor  as  a  part  of  the  supplemental  restraint  system. Thi s  sen-
sor  is  equipped  in  the  front  pas senger’s  seat  cushion.  This  sensor
measures the electrostatic capacity of the front passenger’s se at. The
SAS unit is designed to prevent the front passenger front and side air
bags  and  seat  belt  pretensioner  system  from  deploying  if  the  front
passenger air bag deactivation indicator light turns on.
To  reduce  the  chance  of  injuries  caused  by  deployment  of  the  front
passenger  air  bag,  the  system  deactivates  the  front  passenger  f ront
and side air bags and also the seat belt pretensioner system wh en the
front  passenger  air  bag  deactivat ion  indicator  light  turns  on. Refer  to
the following table for the front passenger air bag deactivatio n indica-
tor light illumination conditions.
This system shuts off the front p assenger front and side air bags and
seat  belt  pretensioner  system,  s o  make  sure  the  front  passenger  air
bag  deactivation  indicator  light  turns  on  according  to  the  foll owing
table.
The  air  bag/front  seat  belt  pretensioner  system  warning  light  f lashes
and the front passenger air bag deactivation indicator light il luminates
if  the  sensors  have  a  possible  ma lfunction.  If  this  happens,  the  front
passenger  front  and  side  air  bags  and  seat  belt  pretensioner  sy stem
will not deploy.
First,  please  read  “Supplemental  Restraint  System  (SRS)  Pre-
cautions” ( P. 66) carefully.
Front Passenger Occupant  Classification Sensor 
Page 83 of 572

YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
831-4. SRS Air Bags
1
Essential Safety Equipment
■Front passenger air bag deactivation indicator light
This  indicator  light  turns  on  to
remind  you  that  the  front  pas-
senger  front  and  side  air  bags
and  seat  belt  pretensioner  will
not deploy duri ng a collision.
If the front passenger occupant cl assification sensor is normal,  the
indicator  light  turns  on  when  the  ignition  is  switched  ON.  The  light
turns off after a few seconds. Then, the indicator light turns  on or is
off under the following conditions:
■Front passenger air bag deactivat ion indicator light on/off con-
dition chart
*1: The  occupant  classification  sensor  may  not  detect  a  child  seat ed  on  the
seat,  in  a  child-restraint  system,  or  a  junior  seat  depending  o n  the  child’s
physical size and seated posture.
*2: If a smaller adult sits on the front passenger seat, the senso rs might detect
the person as being a child depending on the person’s physique.
The curtain air bag is ready for inflating regardless of what t he front
passenger air bag deactivation in dicator light on/off condition chart
indicates.
Condition detected 
by the front passen-
ger occupant classi-
fication systemFront passen-ger air bag 
deactivation 
indicator lightFront passen- ger front and 
side air bagsFront passen- ger seat belt 
pretensioner 
system
Empty  (Not  occu-
pied)OnDeactivatedDeactivated
A  child  less  than  1
year old is seated in
a child-restraint sys-
tem
OnDeactivatedDeactivated
Child*1On or offDeactivated or  readyDeactivated or ready
Adult*2OffReadyReady 
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YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
851-4. SRS Air Bags
1
Essential Safety Equipment
WARNING
■Do  not  allow  an  occupant  in  the  front  passenger’s  seat  to  sit  w ith  a
posture which makes it difficult for the front passenger occupa nt clas-
sification sensor to detect  the occupant correctly
Sitting  in  the  front  passenger’s  seat  with  a  posture  which  make s  it  difficult
for  the  front  passenger  occupant  classification  sensor  to  detec t  the  occu-
pant  correctly  is  dangerous.  If  the  front  passenger  occupant  classification
sensor cannot detect the occupant sitting on the front passenge r’s seat cor-
rectly, the front passenger front and side air bags and pretens ioner system
may  not  operate  (deploy)  or  they  may  operate  (deploy)  accidenta lly.  The
front passenger will not have the supplementary protection of t he air bags or
the accidental operation (deployment) of the air bags could res ult in serious
injury  or  death.  Under  the  following  conditions,  the  front  pass enger  occu-
pant  classification  sensor  cannot  detect  a  passenger  sitting  on  the  front
passenger’s  seat  correctly  and  the  deployment/non-deployment  of   the  air
bags cannot be controlled as indicated in the front passenger air bag deac-
tivation indicator light on/off condition chart. For example:
● A front passenger is seated as shown in the following figure:
● A rear passenger pushes up on the front passenger seat with their feet.
● Luggage or other items placed under the front passenger seat or  between
the front passenger seat and driver seat that push up the front passenger
seat bottom.
● An object, such as a seat cushion, is put on the front passenge r’s seat or
between the passenger’s back and the seatback. 
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YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
1-4. SRS Air Bags
WARNING
■Do  not  allow  an  occupant  in  the  front  passenger’s  seat  to  sit  w ith  a
posture which makes it difficult for the front passenger occupa nt clas-
sification sensor to detect  the occupant correctly
● A seat cover is put on the front passenger’s seat.
● Luggage  or  other  items  are  placed  on  the  seat  with  the  child  in   the  child-
restraint system.
● A  rear  passenger  or  luggage  push  or  pull  down  on  the  front  pass enger
seatback.
● Luggage  or  other  items  are  placed  on  the  seatback  or  hung  on  the  head
restraint.
● The seat is washed.
● Liquids are spilled on the seat.
● The  front  passenger  seat  is  moved  backward,  pushing  into  luggag e  or
other items placed behind it.
● The front passenger seatback contacts the rear seat.
● Luggage or other items are placed between the front passenger s eat and
driver seat.
● An electric device is put on the front passenger’s seat.
● An  additional  electrical  device,  such  as  a  seat  warmer  is  installed  to  the
surface of the front passenger seat.
The front passenger front and side air bags and seat belt prete nsioner sys-
tems will deactivate if the front passenger air bag deactivatio n indicator light
turns on.
NOTICE
● To assure proper deployment of the front air bag and to prevent  damage to
the sensor in the front seat cushion:
• Do not place sharp objects on the front seat cushion or leave  heavy lug-
gage on them.
• Do not spill any liquids on the front seats or under the front seats.
● To allow the sensors to function properly, always perform the f ollowing:
• Adjust  the  front  seats  as  far  back  as  possible  and  always  sit  upright
against the seatbacks with seat belts worn properly.
• If  you  place  your  child  on  the  front  passenger  seat,  secure  th e  child-
restraint system properly and slide the front passenger seat as  far back
as possible ( P. 57).