Not necessarily, the cold idle speed is controlled by the wax element next to the ISC not by the stepper motor. The actual idle speed should be set by the BSS as mentioned previously. There is also allot of ignition timing change by the ECU that many times is the cause of unstable idle speed.

Cheers, Charlie
If It ain't broke, Modify it!
87 Montero turbo Converted back in Spring1989
95 Montero SR 3.8 DOHC Only one?
93 Pajero 3 door 6G75 Mivec with paddle shifted 5 speed
Then a Gen2 SR with full coil independent suspension.