Avalon, Camry, Camry Solara, Celica, Corolla & ECHO
Disconnect seat belt buckle switch 2-pin connector. See Fig 1. Check for continuity between seat belt buckle switch terminals. With seat belt buckle switch on (belt fastened), continuity should exist. With seat belt buckle switch off (belt unfastened), no continuity should exist. If continuity is not as specified, replace seat belt.