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1F2 -- 64 M161 ENGINE CONTROLS DAEWOO MY_2000 ENGINE COOLANT TEMPERATURE (ECT) SENSOR YAA1F590 Engine Coolant Temperature (ECT) sensor detects coolant temperature and supplies information to the ECM. It is composed of metal housing with two NTC resistor, 4 pin connector. The ECM provides a 5 volt signal to the ECT sensor through a dropping resistor. When the engine is cold, the ECT sensor provides high resistance, which the ECM detects as a high signal voltage. As the engine warms up, the sensor resistance becomes lower, and the signal voltage drops. At normal engine operating temperature, the ECT signal will measure about 1.5 to 2.0 volts. Fuel delivery D Ignition control D Knock sensor system D Idle speed D Torque converter clutch application D Canister purge D Cooling fan operation D Others |