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Home >> Subaru >> 2014 >> BRZ Premium >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC System (Heater, Ventilator And A/C) >> Cooler Thermistor (Ambient Sensor) >> Unit Inspection

Unit Inspection

  1. Inspection of cooler thermistor (ambient sensor)
    1. Resistance inspection
      1. Measure the resistance according to the following chart.
      RESISTANCE

      Inspection terminals Inspection conditions (Ambient temperature) Standard value
      1 - 2 10°C {50°F} 3.00 to 3.73 kΩ
      15°C {59°F} 2.45 to 2.88 kΩ
      20°C {68°F} 1.95 to 2.30 kΩ
      25°C {77°F} 1.60 to 1.80 kΩ
      30°C {86°F} 1.28 to 1.47 kΩ
      35°C {95°F} 1.00 to 1.22 kΩ
      40°C {104°F} 0.80 to 1.00 kΩ
      45°C {113°F} 0.65 to 0.85 kΩ
      50°C {122°F} 0.50 to 0.70 kΩ
      55°C {131°F} 0.44 to 0.60 kΩ
      60°C {140°F} 0.36 to 0.50 kΩ
      Fig 1: Cooler Thermistor (Ambient Sensor) Terminals Resistance Chart
      G08553626Courtesy of SUBARU OF AMERICA, INC.
      NOTE:
      • If you touch the temperature sensor, correct judgment cannot be made due to your body temperature. To inspect the sensor, hold the connector side.
      • Perform inspection after the sensor is adapted to the ambient temperature.