Engine Coolant Temperature Sensor: Inspection

WARNING: This page is about a different car, the 2007 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT ENGINE COOLANT TEMPERATURE SENSOR

Measure the resistance of the sensor.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
1 - 2	20°C (68°F)	2.32 to 2.59 kΩ
1 - 2	80°C (176°F)	0.310 to 0.326 kΩ

NOTE: If checking the sensor in water, be careful not to allow water to contact the terminals. After checking, dry the sensor.

Fig 1: Measuring Resistance Of Sensor

If the result is not as specified, replace the engine coolant temperature sensor.