Squib Circuit Connector Lock Switch
The switch is a mechanism that shorts the power supply terminal to the ground terminal automatically in the air bag squib circuit when the connector is disconnected. A "short" spring is integrated inside the connector. This spring prevents static electricity from flowing to the squib by shorting the power supply terminal to the ground terminal. (i:e. there is no potential difference between the two terminals.)
CAUTION: When the connector is disconnected, there will be short circuit between the terminals. This is not a fault.