See also:

System monitors
A diagnostic system continually monitors the readiness of the seatbelt pretensioner while the vehicle is being driven. The seatbelt pretensioners share the control module with the SRS airbag system. ...

Brake booster
If the brake booster does not operate as described in the following, have it checked by your SUBARU dealer. 1. With the engine off, depress the brake pedal several times, applying the same pedal forc ...

Examples of the types of accidents in which the SRS curtain airbag will most likely deploy.
1) A severe side impact near the front seat or the rear seat activates the SRS curtain airbag. 2) The vehicle rolls onto its side or the roof. 3) If the angle of vehicle tip-up is marginal o ...