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ENGINE COOLANT TEMPERATURE (ECT) SENSOR CONSTRUCTION/OPERATION [L8, LF, L3]

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1 | ECT sensor
2 | Exhaust manifold

• Installed on the water bypass tube (directly below the ignition coil).
• The ECT is a thermistor type, the resistance changes according to the engine coolant temperature.

1 | ECT sensor
2 | ECT sensor resistance characteristic
3 | Resistance
4 | Engine coolant temperature
5 | Large
6 | Small
7 | Low
8 | High

• The resistance decreases if the engine coolant temperature increases, and increases if the engine coolant temperature decreases.