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Engine Coolant Temperature Sensor: Inspection

  1. INSPECT ENGINE COOLANT TEMPERATURE SENSOR 
    Fig 1: Temperature And Resistance Graph
    G05628269Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Partially immerse 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
    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 engine coolant temperature sensor.

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