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Home >> Pontiac >> 1987 >> J2000/Sunbird L4-121 2.0L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Port Fuel Injection Models >> Function Selector Positions >> IAC - Idle Air Control

IAC - Idle Air Control



The IAC is controlled by the ECM to maintain specified idle speed. The ECM controls the IAC in with voltage pulses (counts) and these counts are displayed in this position. The number of counts displayed represents the position the ECM ``thinks'' the IAC is in. Normal readings are in the 5-50 range.

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