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Engine Coolant Temperature Sensor: Inspection: Inspection

  1. INSPECT ENGINE COOLANT TEMPERATURE SENSOR 
    Fig 1: Resistance And Temperature Graph
    GTY135115Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 Condition Specified Condition
      1 - 2 Approximately 20°C (68°F) 2.32 to 2.59 kΩ
      1 - 2 Approximately 80°C (176°F) 0.310 to 0.326 kΩ

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

      HINT: 

      If the result is as specified, it is not necessary to replace the sensor.

      NOTE:

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

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