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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls And Fuel - 1.4L (LUJ, LUV) - DTC P0010 To P0246 >> Diagnostic Information and Procedures >> DTC P0128: Engine Coolant Temperature (ECT) >> Component Testing

Component Testing

  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.
    • 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.

    • If infinite resistance 
  4. Refer to Thermostat Diagnosis (1.4L LUV) .
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