Examples of the types of accidents in which the SRS curtain airbag is unlikely to deploy.

1) The vehicle is involved in an oblique side-on impact.
2) The vehicle is involved in a side-on impact in an area outside the vicinity of the passenger compartment.
3) The vehicle is involved in a side-on impact from a motorcycle.
There are many types of collisions which might not necessarily require SRS curtain airbag deployment. In the event of accidents like those illustrated, the SRS curtain airbag may not deploy depending on the level of accident forces involved.
See also:
Vehicle Dynamics Control warning light/Vehicle Dynamics Control operation indicator
light
The light illuminates when the ignition switch is turned to the “ON” position
and turns off several seconds after the engine has started. This lighting pattern
indicates that the Vehicle Dynamic ...
When “CHECK DISC” is displayed
Press the eject button to unload the discs. Check that the disc is not damaged
or scratched, and also check that the disc is inserted correctly. This message may
appear when using some CD-RW discs ...
Brake system warning light
WARNING
● Driving with the brake system warning light on is dangerous. This indicates
your brake system may not be working properly. If the light remains illuminated,
have the brakes insp ...
