Idle Air Control Valve (IACV)

[Lord Popgun]

I just did the test. You have to put your ear pretty close to the Throttle body on the right side of the engine. Turn on the switch and you will hear the fuel pump (or usually hear it as Ulvetana said) and hear the IACV. It makes a kinda fast clicking sound, but only for maybe a second. Maybe less that a second.

I did the test in my garage with no background noise. The clicking or racheting sound wasn't very loud.