Engine Coolant Temperature Sensor: Inspection

INSPECT ENGINE COOLANT TEMPERATURE SENSOR

Measure the resistance between the terminals.

Resistance

ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE CHART

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

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.

Fig 1: Inspecting Engine Coolant Temperature Sensor

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.