Celica GT Liftback L4-2164cc 2.2L DOHC (5S-FE) MFI (1999)
Seat Belt Buckle Switch: Testing and Inspection
INSPECT BUCKLE SWITCH CONTINUITY
a. Check that continuity exists between terminals of the switch side connector with the switch ON (belt fastened).
b. Check that no continuity exists between terminals of the switch side connector with the switch OFF (belt unfastened).
If operation is not as specified, replace the seat belt inner.