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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Engine Controls And Fuel - 2.5L (LCV) - Diagnostic Information And Procedures (P0010 - P034B)) >> Diagnostic Information And Procedures >> DTC P0116: Engine Coolant Temperature (ECT) Sensor Performance >> Component Testing

Component Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF, disconnect the harness connector at the B34 Engine Coolant Temperature Sensor.
  2. Test the ECT sensor by varying the sensor temperature while monitoring the sensor resistance.
  3. Verify the readings are within the range specified in the Temperature Versus Resistance - Engine Coolant Temperature Sensor table.
    • If not within the specified range 

      Replace the B34 Engine Coolant Temperature Sensor.

    • Go to next step: If within the specified range 
  4. Test for infinite resistance between each terminal and the sensor housing.
    • If less than infinite resistance 

      Replace the B34 Engine Coolant Temperature Sensor.

    • Go to next step: If infinite resistance 
  5. All OK.
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