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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 353 (Engine Controls And Fuel - 2.5L (LCV) - DTC P0010 To DTC P0366) >> Diagnostic Information and Procedures >> DTC P0116: Engine Coolant Temperature (ECT) Sensor Performance >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
  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.

    • 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.

    • If infinite resistance 
  5. All OK.
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