Test NTC-4A - Checking Coolant Sensor Calibration & Radiator Fan Operation
WARNING: This page is about a different car, the 1994 Plymouth Acclaim and 1994 Dodge Spirit. However, it is still accessible from the selected car via links, so may be relevant.
- Start engine. Using DRB, read Engine Coolant Temperature (ECT) sensor value. If ECT sensor temperature is more than 180°F (82°C), stop engine. Allow engine coolant to cool to 150°F (66°C). Start engine. Allow engine to reach normal operating temperature of 180°F (82°C) or more. If ECT sensor value does not increase smoothly, replace ECT sensor. Perform TEST VER-2 . If ECT sensor value did increase smoothly, go to next step.
- If ECT sensor value did not reach 180°F (82°C) or more, replace ECT sensor. Perform TEST VER-2. If ECT sensor value reached 180°F (82°C) or more, run engine until radiator fan operates or ECT sensor value reaches 220°F (104°C). If cooling fan does not operate, repair cooling system as necessary. Perform TEST VER-2. If cooling fan operates, system is functioning properly. Test is complete.