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Engine Coolant Temperature Sensor: Inspection

  1. INSPECT ENGINE COOLANT TEMPERATURE SENSOR 
    1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Condition Specified Condition
      Approximately 20°C (68°F) 2.32 k to 2.59 kΩ
      Approximately 80°C (176°F) 0.310 k to 0.326 kΩ
      NOTE: When checking the engine coolant temperature sensor in water, keep the terminals dry. After the check, wipe the sensor dry.

      If the resistance is not as specified, replace the engine coolant temperature sensor.

      Fig 1: Measuring Resistance Between Engine Coolant Temperature Sensor Terminals
      G05398777Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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