ENGINE COOLANT TEMPERATURE (ECT) SENSOR CONSTRUCTION/OPERATION


BHE014018840T02

• Installed on the thermostat case.

1
ECT sensor
2
Illustration shows 13B-MSP (High power)

• A thermistor type is used and the resistance changes according to the ECT.

• As shown in the characteristics graph, when the ECT is high, the resistance is small, and when the ECT is low, the resistance is large.

ECT Sensor Characteristics

1
Resistance (kilohm)
2
ECT

System Diagram

1
ECT sensor
2
PCM
3
CPU