Automated elevator safety chain diagnosis

An elevator system, comprising:

• an elevator car situated for movement among a plurality of landings, the elevator car including a car door and a door mover;
• a landing door at each of the landings;
• a door interlock associated with the landing door at each of the landings, the door interlocks being configured to couple the associated landing door with the car door, the door interlocks respectively including a lock switch;
• and
• a controller configured to:
• cause the elevator car to move to at least one selected landing of the plurality of landings;
• when the elevator car is at the at least one selected landing, cause the door mover to instigate movement of the door interlock sufficient to at least temporarily change a position of the lock switch at the at least one selected landing;
• and
• locate a malfunctioning one of the lock switches at one of the landings based on the movement of the door interlock.