Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection

INSPECTION

1. Warm engine up to operating temperature (the radiator cooling fan comes on).
2. Turn ignition off.
3. Disconnect the two pin connector at the Engine Coolant Temperature (ECT) Sensor. Measure the resistance between the two terminals at the ECT. Resistance should measure roughly 200-400 ohms. If resistance is outside range replace the ECT.

NOTE: If the ECT tests ok but symptom or DTC indication persist see DTC troubleshooting for DTC 6.