If I unplug the ICV electrical connector, engine idling, and no change in the idle speed occurs, whether the engine is cold or warmed up, does this confirm that the ICV is bad and should be replaced (or cleaned)?

Engine idle was previously doing quite a bit of 'hunting' (speed up & down) at cold idle. I found 1 vacuum line disconnected, 1 large rip in the rubber gasket under the air intake (repaired with silicone sealant for now).

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1986 560SL
2002 Toyota Camry
1993 Lexus