1F2-54 M161 ENGINE CONTROLS
ENGINE COOLANT TEMPERATURE (ECT) SENSOR
1 Artificial Resin Housing
2 Metal Housing
3 NTC (Negative Temperature Coefficient)
Resistor
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.
The ECM uses information about coolant temperature to make the necessary calculations for:
•
Fuel delivery
•
Ignition control
•
Knock sensor system
•
Idle speed
•
Torque converter clutch application
•
Canister purge
•
Cooling fan operation
•
Others
4 Connector
5 Engine Coolant Temperature Sensor
YAA1F590
SSANGYONG Y200