Engine Coolant Temperature Sensor: Inspection

INSPECT ENGINE COOLANT TEMPERATURE SENSOR

Fig 1: Locating Engine Coolant Temperature Sensor Connector

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Fig 2: Inspecting Engine Coolant Temperature Sensor

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

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

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