Component Testing
WARNING: This page is about a different car, the 2010 Saturn Outlook, 2010 GMC Acadia, 2010 Chevrolet Traverse, and 2010 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the engine coolant temperature (ECT) sensor.
- 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 and verify that the resistance is within 5 % of the specification.
- If not within the specified range, replace the ECT sensor.
NOTE:
A thermometer can be used to test the sensor off the vehicle.