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Home >> Geo >> 1995 >> Prizm Base, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Controls - System/Component Tests - 1.8L) >> Idle Control System >> Idle Air Control (IAC) Valve

Idle Air Control (IAC) Valve

WARNING: This page is about a different variant/trim than selected.

Idle Air Control (IAC) valve is located on the bottom of the throttle body. IAC valve opens and closes air by-pass passage according to a signal from ECM/PCM. When it opens, air is supplied to intake manifold, which increases engine RPM for different engine loads. To check IAC valve operation, see appropriate CHART C-2A under DIAGNOSTIC CHARTS.

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