The PCM of a vehicle is the brains behind the power. It is an electric circuit board that operates everything from the car radio and air conditioning to the transmission and fuel delivery.
The procedures included in definitions should be repeatable by anyone or at least by peers. An example of operational definition of the term weight of an object, operationalized to a degree, would be the following: weight is the numbers that appear when that object is placed on a weighing scale.
Operational definitions literally point us to concrete indicators of abstract ideas. For example, a psychologist might create an operational definition for the abstract construct, hunger, to point to the behaviors or set of conditions in the world to which hunger is tied. Constructs could also be tied to observations indirectly via other constructs.