DTC B1771 Buckle Switch: DTC detecting condition

Passenger's seat buckle switch is faulty.
Passenger's buckle switch circuit is open, shorted or shorted to ground.
Occupant detection system is faulty.
Occupant detection harness is faulty.
Perform the diagnosis from step 2 in "DTC B1655 FRONT BUCKLE SWITCH RH FAILURE". Ref. to OCCUPANT DETECTION (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1655 FRONT BUCKLE SWITCH RH FAILURE .