SRS Air Bags

Seat Belt Pretensioners

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).

Front

The front seat belt pretensioners are designed to deploy in moderate or severe frontal, near frontal collisions.

In addition, the pretensioners operate when a side collision or a roll-over accident is detected.

Rear Outboard

The rear outboard seat belt pretensioners are designed to deploy in moderate or severe frontal, near frontal collisions.

In addition, the pretensioners operate when a side collision or a roll-over accident is detected.

Driver and Front Passenger Knee Air Bags

The knee air bags are equipped under the instrument panel.

If the air bag crash sensors receive a frontal impact of greater than moderate force, the knee air bags deploy immediately to reduce impact to the driver and front passenger's legs.

For more details about air bag deployment, refer to "SRS Air Bag Deployment Criteria" (Search).

Side Air Bags

There are 2 types of side air bags including the side air bags for the driver and front passenger and rear passengers.

Front seat side air bags

The front seat side air bags are mounted in the outboard sides of the front 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 front passenger'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 Bag Deployment Criteria" (Search).

In addition, the front passenger side air bag is designed to only deploy in accordance with the total seated weight on the front passenger seat. For details, refer to the driver and front passenger occupant classification system (Search).

Rear seat side air bags

The rear seat side air bags are installed in the rear pillars. The rear seat side air bags on the side where the vehicle is hit deploys regardless of whether or not an occupant is seated.

For more details about air bag deployment, refer to "SRS Air Bag Deployment Criteria" (Search).

 

Curtain Air Bags

The curtain air bags are mounted in the front and rear window pillars, 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 helps to reduce injury mainly to the driver and front and rear outboard passengers' heads 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 a side impact:

Greater than moderate impact to one side of the vehicle will cause 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.

SRS Air Bag Deployment Criteria

Limitations to SRS Air Bag

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.

 

Impacts involving trees or poles

 

Frontal offset impact to the vehicle

 

Rear-ending or running under a truck's tail gate

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.

 

Side impacts involving trees or poles

Side impacts with two-wheeled vehicles

Limitations to roll-over detection:

The following illustration is an example of an accident that may not be detected as a roll-over accident. Therefore, the seat belt pretensioners and curtain air bags may not deploy.

 

Pitch end over end

Driver and Front Passenger Occupant Classification System

First, please read "Supplemental Restraint System (SRS) Precautions" (Search) carefully.

Driver Seat Slide Position Sensor

Your vehicle is equipped with a driver seat slide position sensor as a part of the supplemental restraint system. The sensor is located under the driver seat.

The sensor determines whether the driver seat is fore or aft of a reference position and sends the seat position to the diagnostic module (SAS unit).

The SAS unit is designed to control the deployment of the driver air bag depending on how close the driver seat is to the steering wheel.

The air bag/seat belt pretensioner system warning light flashes if the sensor has a possible malfunction (Search).

Driver and Front Passenger Buckle Switches

The buckle switches on the front seat belts detect whether or not the front seat belts are securely fastened and further control the deployment of the air bags.

Constant Monitoring

Constant Monitoring

The following components of the air bag systems are monitored by a diagnostic system:

 

  • Front air bag sensors

  • Crash sensors, and diagnostic module (SAS unit)

  • Side crash sensors

  • Air bag modules

  • Seat belt pretensioners

  • Air bag/Seat belt pretensioner system warning light

  • Related wiring

  • Driver seat slide position sensor

  • Front passenger occupant classification sensor

  • Front passenger occupant classification module

  • Front passenger air bag deactivation indicator light

  • Front passenger seat belt buckle switch

 

The diagnostic module continuously monitors the system's readiness. This begins when the power switch is switched ON and continues while the vehicle is being driven.

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