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Engine Coolant Temperature Sensor: Inspection: Inspection

  1. INSPECT ENGINE COOLANT TEMPERATURE SENSOR 
    Fig 1: Immerse Sensor In Water & Measure The Resistance
    GTY285855Courtesy 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 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.