See also:

Operation
The SRS side airbag and SRS curtain airbag can function only when the ignition switch is in the “ON” position. The driver’s and front passenger’s SRS side airbags and SRS curtain airbags deploy ...

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 ...

Examples of the types of accidents in which the SRS side airbag and SRS curtain airbag will basically not deploy.
1) The vehicle is involved in frontal collision with another vehicle (moving or stationary). 2) The vehicle is struck from behind. 3) The vehicle pitches end over end. In the event of accidents ...