Subaru Legacy 2004 Service Manual page 3518

Airbag Connector
AIRBAG SYSTEM (DIAGNOSTICS)
2) How to connect:
Holding the connector, and push it in carefully until
a connecting sound is heard.
CAUTION:
• Outer side (A) move back, and so do not put
your hand on the outer part.
• Be sure to insert the connector in until it
locks. Then pull it gently to make sure that it is
locked.
AB-00025
AB(diag)-28