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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 2 (Engine Controls And Fuel - 5.3L (L83) Or 6.2L (L86) - DTC P0010 To DTC P0442) >> Diagnostic Information And Procedures >> DTC P0116: Engine Coolant Temperature (ECT) Sensor Performance >> Component Testing

Component Testing

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. 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. Compare the readings with the Temperature Versus Resistance - Engine Coolant Temperature Sensor table. The resistance values should be in range of the table values.
    • If not within the specified range 

      Replace the B34 Engine Coolant Temperature Sensor.

    • Go to next step : If within the specified range 
  3. 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 
  4. All OK.
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