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Engine Coolant Temperature Sensor: Inspection

WARNING: This page is about a different car, the 2007 Lexus GS 350. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT ENGINE COOLANT TEMPERATURE SENSOR 
    1. Partially soak the sensor in water and warm up the water.
      Fig 1: Measuring Resistance Between Engine Coolant Temperature Sensor Terminals
      G05285368Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance between the terminals.

      Standard resistance 

      RESISTANCE SPECIFICATION

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

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

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