Remote diagnostics is a term broadly used to refer to methods of analysis and observation that occur remotely. This term is widely used in the auto industry, but is also used in IT and in a number of industries where diagnostics are necessary.
Techopedia explains Remote Diagnostics
The general idea of remote diagnostics is that the active system is not co-located with what is being diagnosed. The need for this process is different in depending on the industry — in some physical or manufacturing industries, there is a need to separate planning from an assembly floor or other physical production area. In IT, the idea of remote diagnostics often applies to philosophies of remote work that help to form collaborative processes with distributed computing.
In other words, human operators and pieces of hardware can be scattered around the globe, but still work closely together, as if they were in the same room and connected by simple Ethernet cabling.
Some features of remote diagnostics software include security, video conferencing or messaging platforms, and data access tools for updating parts of the system over a long distance. Telecom technologies like VoIP are often part of these systems, and the critical design of many of today's remote diagnostics tools relies on the global Internet, where information can be delivered accurately and quickly regardless of physical distances.