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Home >> Subaru >> 2018 >> WRX Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Fuel Injection System (STI)) >> Engine Coolant Temperature Sensor >> Inspection

Engine Coolant Temperature Sensor: Inspection

WARNING: This page is about a different variant/trim than selected.
  1. Check that the engine coolant temperature sensor has no deformation, cracks or other damages.
  2. Immerse the engine coolant temperature sensor and a thermometer in water.
    CAUTION: Take care not to allow water to get into the engine coolant temperature sensor connector. Completely remove any water inside.
    G12437289
  3. Raise water temperature gradually, measure the resistance between the engine coolant temperature sensor terminals when the temperature is 20°C (68°F) and 80°C (176°F).
    NOTE: Agitate the water for even temperature distribution.
    G06344640
    WATER TEMPERATURE TERMINAL NO. STANDARD
    20°C (68°F) 1 and 2 2.45±0.2 kΩ
    80°C (176°F) 0.318±0.013 kΩ