Engine Coolant Temperature Sensor: Inspection

WARNING: This page is about a different car, the 2006 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT ENGINE COOLANT TEMPERATURE SENSOR

Measure the resistance between the terminals.

Fig 1: Inspecting Engine Coolant Temperature Sensor

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Resistance

CONDITION SPECIFIED CONDITION

Condition	Specified Condition
Approx. 20°C (68°F)	2.32 to 2.59 k
Approx. 80°C (176°F)	0.31 to 0.326 k

If the result is not as specified, replace the sensor.

NOTE: If checking the ECT sensor in the water, keep the terminals dry. After the check, wipe the sensor.