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Home › Buick › 1986 › Skyhawk Sport, 2.0 P, Standard › Repair and Diagnosis › Engine Performance › System › 1.8L Turbo Tests W/Codes › Chart C12 - Fan Control Circuit › ECM Control

ECM Control

A/C on.
Vehicle speed less than 35 MPH.
Circuit 409 to A/C Fan Relay terminal "C" grounded by ECM at terminal C1.
Coolant temperature less than 230°F (110°C).