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Home >> Volvo >> 2009 >> XC70 Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Electrical Modules And Components - Design And Function - 5 Of 5 >> Supplemental Restraint System Control Module (SRS) >> Design >> Deployment Levels For Impact Protection Upon Head-On Collision
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Deployment Levels For Impact Protection Upon Head-On Collision

The table below shows how the SRS system usually reacts in the event of a head-on collision.

Level 1= Low speed collision

Level 5 = Severe collision

Collision level Front seat Backseat
Seat belt not in use Seat belt in use Seat belt not in use Seat belt in use
Level 1  No corrective action. The belt tensioner is deployed.
Airbags are not deployed.
No corrective action. The belt tensioner is deployed (certain markets only).
Level 2  The airbags are deployed with a slow build-up of pressure. The belt tensioner is deployed.
Airbags are not deployed.
No corrective action. The belt tensioner is deployed (certain markets only).
Level 3  The airbags are deployed with a slow build-up of pressure. The belt tensioner is deployed.
The airbags are deployed with a slow build-up of pressure.
The adaptive steering column is triggered (USA/CAN only).
The adaptive belt force limiter could be deployed (USA/CAN).
The belt tensioner is deployed (certain markets only). The belt tensioner is deployed.
Level 4  The airbags are deployed with a fast build-up of pressure.
Airbag ventilation could be triggered (USA/CAN only).
The inflatable curtain could be deployed (2008-).
The belt tensioner is deployed.
The airbags are deployed with a slow build-up of pressure.
The adaptive steering column is triggered (USA/CAN only).
The adaptive belt force limiter could be deployed (USA/CAN).
The belt tensioner is deployed (certain markets only). The belt tensioner is deployed.
Level 5  The airbags are deployed with a fast build-up of pressure.
The inflatable curtain could be deployed (2008-).
The belt tensioner is deployed.
The airbags are deployed with a fast build-up of pressure.
The adaptive steering column is triggered (USA/CAN only).
The adaptive belt force limiter could be deployed (USA/CAN).
Airbag ventilation (USA/CAN only).
The inflatable curtain could be deployed.
Airbag ventilation (USA/CAN only).
The belt tensioner is deployed (certain markets only). The belt tensioner is deployed.