An engine control monitoring system (ECMS) is a system that monitors the performance of an engine and provides feedback to the operator. ECMSs are used in a variety of vehicles, including trains, cars, and trucks.

In trains, ECMSs are used to monitor the performance of the diesel engines that power the trains. ECMSs can monitor a variety of parameters, including engine speed, temperature, and fuel consumption. ECMSs can also provide feedback to the operator about the condition of the engine, such as if there is a problem with the fuel system or the cooling system.