Engine Coolant Temperature Sensor: Inspection

Fig 1: Locating Engine Coolant Temperature Sensor Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Inspecting Engine Coolant Temperature Sensor

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Text in Illustration 

1. Partially immerse the sensor in water and warm up the water.
2. Measure the resistance according to the value (s) in the table below.

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   1 - 2	20°C (68°F)	2.32 to 2.59 kΩ
   1 - 2	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 engine coolant temperature sensor.