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Engine Coolant Temperature Sensor: Inspection: Inspection

  1. INSPECT E.F.I. ENGINE COOLANT TEMPERATURE SENSOR 
    Fig 1: Measuring Resistance Between Terminals With Ohmmeter
    GTY191657Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Check the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

        Standard

        Tester Connection Specified Condition
        1 (E2) - 2 (THW) 2.32 to 2.59 kΩ at 20°C (68°F)
        1 (E2) - 2 (THW) 0.310 to 0.326 kΩ at 80°C (176°F)
        NOTE:

        If checking the engine coolant temperature sensor in water, be careful not to allow water to intrude into the terminals. After checking, wipe the water off the engine coolant temperature sensor.

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