Engine Coolant Temperature Sensor: Inspection

WARNING: This page is about a different car, the 2007 Lexus SC 430. 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.

Fig 1: Identifying Engine Coolant Temperature Sensor

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Engine Coolant Temperature Sensor Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
1 (E2) - 2 (THW)	20°C (68°F)	2.32 to 2.59 kΩ
1 (E2) - 2 (THW)	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, wipe the water off the sensor.

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