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Engine Coolant Temperature Sensor: Inspection

  1. INSPECT E.F.I. ENGINE COOLANT TEMPERATURE SENSOR 
    Fig 1: Inspecting E.F.I. Engine Coolant Temperature Sensor
    G05751967Courtesy 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 CONNECTION SPECIFIED CONDITION CHART

      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 sensor.

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