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Engine Coolant Temperature Sensor

WARNING: This page is about a different car, the 2004 Toyota RAV4, 2003 Toyota RAV4, and 2002 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
  1. Drain engine coolant. Remove ECT sensor. See ECT SENSOR LOCATIONS . Place ECT sensor and thermometer into a water bath.
    ECT SENSOR LOCATIONS

    Application Sensor Location
    RAV4 Rear Of Engine, Below Air Cleaner Assembly
  2. Measure resistance between terminal Nos. 1 and 2. See Fig 1. If resistance is not as specified, replace ECT sensor.
  3. Install NEW gasket on sensor, and install ECT sensor. Fill with engine coolant.
Fig 1: Measuring ECT Sensor Resistance
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