Check Points:

Check the seat belt webbing. Refer to SEAT BELT WEBBING, CHECKING .
Check the automatic belt retractor (locking function). Refer to AUTOMATIC BELT RETRACTOR (LOCKING FUNCTION), CHECKING .
Visual inspection of the seat belt latch. Refer to SEAT BELT LATCH, VISUALLY INSPECTING .
Seat belt latch function test. Refer to SEAT BELT LATCH, FUNCTION TEST .
Seat Belt Relays and Belt Tongues, Checking. Refer to SEAT BELT RELAYS AND BELT TONGUE, CHECKING .
Check the fasteners and mounting points. Refer to FASTENERS AND MOUNTING POINTS, CHECKING AFTER A COLLISION .
Check the function of the child seat anchorage for additional child seats (not for the driver safety belt). Refer to SEAT BELT FOR CHILD SEAT, CHECKING CHILD SEAT RESTRAINT FUNCTION, MARKET-SPECIFIC, NOT FOR DRIVER SEAT BELT .