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Engine Coolant Temperature Sensor: Inspection: Inspection

  1. INSPECT ENGINE COOLANT TEMPERATURE SENSOR 
    Fig 1: Identifying Resistance Between Terminals
    GTY228915Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Check the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

        Standard resistance

        Condition Specified Condition
        Approximately 20°C (68°F) 2.32 to 2.59 kΩ
        Approximately 80°C (176°F) 0.310 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.