How does John Deere tractors know that they are broken and lock themselves ?

Question

How does John Deere tractors know that they are broken and lock themselves ?

In: 4

Answer 1

they have a central computer and a bunch of sensors, in the engine, in transmission, maybe elsewhere. Similar to warning lights in a car (Check engine, low tire pressure, low brake fluid, low oil, etc.)

If any sensor stops reporting “normal” readings, central computer check if the sensor is on the “critical” list and if so, locks up the tractor.