Engine Coolant Temperature Sensor: Inspection: Inspection

WARNING: This page is about a different car, the 2010 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT ENGINE COOLANT TEMPERATURE SENSOR

Fig 1: Measuring Resistance Between Engine Coolant Temperature Sensor Terminals

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Partially soak the sensor in the water and warm up the water.

Measure the resistance between the terminals.

Standard resistance

Condition	Specified Condition
Approx. 20°C (68°F)	2.32 to 2.59 kΩ
Approx. 80°C (176°F)	0.310 to 0.326 kΩ

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

NOTE:

When checking the sensor in the water, keep the terminals dry. After the check, wipe the sensor dry.