Turn ignition switch OFF.
Disconnect ECTS connector.
Remove the ECTS.
After immersing the thermistor of the sensor into engine coolant, measure resistance between ECTS terminals 1 and 3.
Check that the resistance is within the specification.
Specification: Refer to “Specification”
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
Disconnect the engine coolant temperature sensor connector (A).
Removal the water temperature control assembly (B).