Toyota 2015 Prius Owner's Manual page 179

1-8. Safety information
Front passenger occupant classification system
Your vehicle is equipped with a front passenger occupant classifica-
tion system. This system detects the conditions of the front passen-
ger seat and activates or deactivates the devices for the front
passenger.
SRS warning light
"AIR BAG OFF" indicator light
"AIR BAG ON" indicator light
Front passenger's seat belt reminder light
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