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Home >> Geo >> 1989 >> Tracker Base, Automatic >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Theory/Operation >> Computerized Engine Controls >> Input Devices >> Coolant Temperature Switch (Spectrum)

Coolant Temperature Switch (Spectrum)

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Switch is located in intake manifold coolant passage. Switch provides coolant temperature information to ECM. When engine coolant is cold, switch is closed. When coolant temperature is 185-203°F (85-95°C), switch opens, indicating a warmed up condition to ECM.

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