Idle Air Control Motor

The motor controls air flow through a passage connected to both intake manifold plenums. The PCM operates idle air control motor. The PCM adjusts engine idle speed through idle air control motor to compensate for engine load or ambient conditions.

The idle air control motor pintle protrudes into a housing connected to idle air passage. The pintle controls air flow through intake manifold while engine idles. By extending or retracting pintle, PCM controls adjusts idle speed for different operating conditions.

The PCM adjusts idle air control motor based on inputs it receives. The inputs affecting idle speed include throttle position, crankshaft position, engine coolant temperature, plus brake switch and air conditioning request signals. By increasing airflow when throttle blade closes quickly at road speeds, PCM prevents deceleration die out.