SRS Air Bags
Seat Belt Pretensioners
The seat belt pretensioners are designed to deploy in moderate or severe frontal, near frontal collisions.
In addition, during a side collision, the pretensioner operates. The pretensioners operate differently depending on what types of air bags are equipped. For more details about seat belt pretensioner operation, refer to the SRS Air Bag Deployment Criteria (Search).
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 Bag Deployment Criteria" (Search).
(Except Mexico)
The driver's dual-stage air bag controls air bag inflation in two 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.
Side Air Bags
The side air bags are mounted in the outboard sides of the seatbacks.
When the air bag crash sensors detect a side impact of greater than moderate force, the system 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 passenger's head and chest caused by directly hitting interior parts such as a door or window.
For more details about air bag deployment, refer to "SRS Air Bag Deployment Criteria" (Search).
In addition, the passenger side air bag is designed to only deploy when the passenger occupant classification sensor detects a passenger sitting on the passenger's seat. For details, refer to the passenger occupant classification system (Search).
SRS Air Bag Deployment Criteria
This chart indicates the applicable SRS equipment that will deploy depending on the type of collision.
(The illustrations are the representative cases of collisions.)
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SRS equipment |
Types of collision |
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|
A severe frontal/near frontal collision |
A severe side collision*2 |
A rear collision |
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 |
 |
 |
|
 |
|||
 |
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|
Seat belt pretensioner |
X*1 |
X*1 |
No air bag and seat belt pretensioner will be activated in a rear collision. |
|
Driver air bag |
X |
||
|
Passenger air bag |
X*1 |
||
|
Side air bag |
X*1 (impact side only) |
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X : The SRS air bag equipment is designed to deploy in a collision.
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The passenger front and side air bags and the seat belt pretensioner are designed to deploy when the passenger occupant classification sensor detects a passenger sitting on the passenger's seat.
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In a side collision, the seat belt pretensioners and the side air bags deploy.
In a frontal offset collision, the equipped air bags and pretensioners may all deploy depending on the direction, angle, and rate of impact.
Limitations to SRS Air Bag
In severe collisions such as those described previously in "SRS Air Bag Deployment Criteria", the applicable SRS air bag equipment will deploy. However, in some accidents, the equipment may not deploy depending on the type of collision and its severity.
Limitations to front/near front collision detection:
The following illustrations are examples of front/near front collisions that may not be detected as severe enough to deploy the SRS air bag equipment.
Limitations to side collision detection:
The following illustrations are examples of side collisions that may not be detected as severe enough to deploy the SRS air bag equipment.
Passenger Occupant Classification System
First, please read "Supplemental Restraint System (SRS) Precautions" (Search) carefully.
Constant Monitoring
The following components of the air bag systems are monitored by a diagnostic system:
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Front air bag sensors
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Crash sensors, and diagnostic module (SAS unit)
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Side crash sensors
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Air bag modules
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Seat belt pretensioners
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Air bag/Seat belt pretensioner system warning light
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Related wiring
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Passenger occupant classification sensor
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Passenger occupant classification module
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Passenger air bag deactivation indicator light
The diagnostic module continuously monitors the system's readiness. This begins when the ignition is switched ON and continues while the vehicle is being driven.
