Engine Coolant Temperature Sensor: Inspection

WARNING: This page is about a different car, the 2007 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT ENGINE COOLANT TEMPERATURE SENSOR

Using an ohmmeter, measure the resistance between the terminals.

Standard resistance

RESISTANCE SPECIFICATION

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

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

NOTE: In case of checking the water temperature sensor in the water, do not allow water to go into the terminals. After checking, dry the sensor.

Fig 1: Inspecting Engine Coolant Temperature Sensor