Final answer:
The technician controlling the IAC motor using functional tests is an example of a diagnostic functional test.
Step-by-step explanation:
Functional testing is a type of testing that seeks to establish whether each application feature works as per the software requirements. Each function is compared to the corresponding requirement to ascertain whether its output is consistent with the end user's expectations.
In the question, the technician controlling the IAC (Idle Air Control) motor using functional tests is an example of a diagnostic functional test.
In diagnostic functional tests, various components or systems are tested under different conditions to identify faults or malfunctions.
The IAC motor, in particular, controls the amount of air entering the engine to maintain the required idle speed. By performing functional tests on it, the technician can determine if the motor is functioning properly or if there are any issues that need to be addressed.