NTC-6B: Checking ECT Sensor Calibration

Turn ignition on, with engine off. Using scan tool, read Engine Coolant Temperature (ECT) sensor value. If engine coolant temperature is more than 180°F (82.2°C), allow engine coolant temperature to cool down to 150°F (65.6°C) before proceeding. If engine coolant temperature is 150°F (65.6°C) or less, start engine and monitor scan tool until engine coolant temperature reaches 180°F (82.2°C). If coolant temperature reaches 180°F (82.2°C) or more, test is complete. If coolant temperature does not reach 180°F (82.2°C) or more, check for cooling system problems and replace ECT sensor.