Corolla S Sedan L4-1794cc 1.8L DOHC MFI (2001)
Seat Belt Buckle Switch: Testing and Inspection
INSPECT BUCKLE SWITCH CONTINUITY
a. Check that continuity exists between terminals 1 and 2 the switch side connectors with the switch OFF (belt fastened).
b. Check that no continuity exists between terminals 1 and 2 the switch side connectors with the switch ON (belt unfastened).
If operation is not as specified, replace the switch.