the isc actuator wich is under pcm(powertrain control module)
control
controls the amount of air entering the intake plenum at
idle.
View page
On idle speed control actuator is located on the front of the
air intake plenum
View page
I have a Mazda 2001 Tribute and I just replaced the Idle Air
Control Valve (IAC). I searched for Idle Speed Control actuator and
there does not appear to be one. The IAC is the silver module right
on top of the manifold.
View page
Idle Speed/Throttle Actuator - ElectronicFront RH Side Of Engine
View page
The Idle Speed Control actuator is located right behind the air
intake plenum