I have a question regarding how the Ford PCM controls the starting function in the Coyote. Does the input require a momentary signal which then activates the starter to operate until the engine is running? Or does the input require a constant source of power which when disconnected manually interrupts the operation of the starter?

In other words, do you have to hold the key in the start position until the engine is running or can you simply activate the circuit, let the key back to the run position, and the PCM will decide when to turn off the starter?

FYI, I have the 2015 crate version of the Coyote.