To enhance the system reliability, the connector engagement check mechanism is used. And a connector lock switch is integrated in the SRS-ECU connector, the air bag module connectors, the clock spring connector, the seat belt pre-tensioner connectors (black connector "A" shown in the illustration above).
note
For details of the structure of the connector lock switch, refer to the 2004 LANCER/LANCER WAGON Technical Information Manual (Pub. No.PYME0302).