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Home >> GMC >> 2019 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (Engine Controls And Fuel - 2.5L (LCV) - Diagnostic Information And Procedures (P0010-P034B)) >> Diagnostic Information and Procedures >> DTC P0117, P0118, or P0119 >> Circuit/System Description

Circuit/System Description

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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 V to the ECT sensor signal circuit and a ground for the low reference circuit. This diagnostic checks for an open, short to ground or an intermittent circuit condition between the ECM and ECT sensor.

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