Engine Coolant Temperature Sensor: Inspection

WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT ENGINE COOLANT TEMPERATURE SENSOR

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

Fig 1: Locating Engine Coolant Temperature Sensor Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Inspecting Engine Coolant Temperature Sensor With Graph
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard resistance

STANDARD RESISTANCE SPECIFICATION

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

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

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