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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)

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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