Engine - Coolant Temperature Sensor/Switch: Service and Repair

ENGINE COOLANT TEMPERATURE (ECT) SENSOR
The engine coolant temperature sensor is installed in the engine coolant passage of the cylinder head, detects engine coolant temperature and emits signals to the ECM. This part employs a thermistor which is sensitive to changes in temperature. The electric resistance of a thermistor decreases in response to temperature rise. The ECM judges engine coolant temperature by the sensor output voltage and provides optimum fuel enrichment when the engine is cold.

REMOVAL
Remove engine coolant temperature sensor from the intake manifold.

INSTALLATION
1. Apply sealant LOCTITE 962T or equivalent to threaded portion.
2. Install engine coolant temperature sensor and tighten it to specified torque.

Tightening torque: Engine coolant temperature sensor 20 - 40 Nm (200 - 400 kg.cm, 14 - 29 lb.ft)

3. Securely connect the harness connector.