On a PFI system, when does the PCM reference the count of the IAC’s pintle valve by momentarily moving the valve to the closed position? A. Each time the ignition is turned off B. Each time the engine...

On a PFI system, when does the PCM reference the count of the IAC’s pintle valve by momentarily moving the valve to the closed position?

A. Each time the ignition is turned off

B. Each time the engine is started

C. When the PCM sees 30 mph from the VSS

D. When the PCM sees 600 RPM from the tach reference signal