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Engine Coolant Temperature Sensor: Inspection

  1. INSPECT ENGINE COOLANT TEMPERATURE SENSOR 
    1. Partially insert the sensor into the water and warm up the water.
    2. Measure the resistance between the terminals.
      Fig 1: Measuring Resistance Between Terminals
      G04027212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      SPECIFIED CONDITION CHART

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

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

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