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System Description

  1. SRS (SUPPLEMENTAL RESTRAINT SYSTEM) AIRBAG SYSTEM 
    1. General Description
      1. The SRS airbag system consists of the following airbag and main components:
        Airbag Regular Cab Model Access Cab Model Double Cab Model
        Driver Airbag Standard Standard Standard
        Front Passenger Airbag Standard Standard Standard
        Side Airbag Standard Standard Standard
        Curtain Shield Airbag Standard Standard Standard
        Main Components Features
        Center Airbag Sensor Assembly
        • Controls airbag deployment
        • Activates dual stage control for driver and front passenger airbags
        • Detects malfunctions in SRS airbag system
        Occupant Classification ECU Determines front passenger seat occupant conditions through occupant classification sensors
        Front Airbag Sensor Detect intensity of frontal collisions though electrical deceleration sensor
        Side Airbag Sensor Detect intensity of side collision through electrical deceleration sensor
        Curtain Shield Airbag Sensors Detect intensity of side rear collision through electrical deceleration sensor
        Occupant Classification Sensors Detect occupant weight on front passenger seat
        Seat Position Sensor Detects driver seat position
        Seat Belt Buckle Switches Detect whether of not seat belt fastened
        Airbag ON/OFF Indicator Illuminates ON or OFF light to indicate front and side passenger airbag deployment availability
        SRS Warning Light Illuminates to indicate existence of malfunctions in SRS airbag system
  2. AIRBAG DEPLOYMENT 
    1. Front Collisions
      1. The driver and front passenger airbags are in case of frontal collisions. These airbags deploy by dual stage control. In order to activate dual stage control, the center airbag sensor assembly monitors the following information through the components shown in the table below:
        Seat Information Models with Bench Seat Models with Separate Seat
        Driver Intensity of Impact Front Airbag Sensor (RH or LH) Same As Left
        Driver Driver Seat Position Seat Position Sensor Same As Left
        Driver Seat Belt Position Seat Belt Buckle Switches Same As Left
        Front Passenger Intensity of Impact Front Airbag Sensor (RH or LH) Same As Left
        Front Passenger Occupant Weight Occupant Classification Sensor Four Occupant Classification Sensors
        Front Passenger Seat Belt Condition Seat Belt Buckle Switches Same As Left
    2. Side Collisions
      1. The side and curtain shield airbags are in case of side collisions. The side airbags are installed in the seat backs of the driver seat and the front passenger seat, and the curtain shield airbags are installed in the upper areas of the right and left center pillars. If a side airbag sensor detects an impact, the airbag sensor assembly center causes the side and curtain shield airbags to be deployed simultaneously.
        Fig 1: Identifying Airbag Deployment For Side Collisions
        GTY210186Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Rear Side Collisions
      1. The curtain shield airbags are in case of rear side collisions. The curtain shield airbags are installed in the upper areas of the right and left center pillars. If a curtain shield airbag sensor detects an impact, the airbag sensor assembly center causes a curtain shield airbag to be deployed.
        Fig 2: Identifying Airbag Deployment For Rear Side Collisions
        GTY210187Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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