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Engine Coolant Temperature Sensor: Inspection

  1. INSPECT ENGINE COOLANT TEMPERATURE SENSOR 
    1. Measure the resistance between terminals 1 and 2.
      Fig 1: Checking Engine Coolant Temperature Sensor
      G05245513Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Resistance 

      RESISTANCE SPECIFICATIONS

      Condition Specified Condition
      20°C (68°F) 2.32 to 2.59 kΩ
      80°C (176°F) 0.310 to 0.326 kΩ

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

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