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Engine Coolant Temperature Sensor: Inspection

  1. INSPECT ENGINE COOLANT TEMPERATURE SENSOR 
    Fig 1: Inspecting Engine Coolant Temperature Sensor
    G05804108Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Partially soak 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 CONNECTIONS SPECIFIED CONDITIONS CHART

      Tester Connection Condition Specified Condition
      1 - 2 Approx. 20°C (68°F) 2.32 k to 2.59 kΩ
      1 - 2 Approx. 80°C (176°F) 0.310 k to 0.326 kΩ

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