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Home >> Saturn >> 2007 >> Relay 3.9 1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - DTC P0010 To DTC P0420 >> DTC P0117 or P0118 >> Circuit/System Description

Circuit/System Description

The engine coolant temperature (ECT) sensor is a variable resistor that measures the temperature of the engine coolant. The engine control module (ECM) supplies 5 volts to the ECT sensor signal circuit and supplies a ground for the low reference circuit.

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