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Home >> Subaru >> 2019 >> Ascent Limited >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC System (Heater, Ventilator And A/C) >> Ambient Sensor >> Inspection

Ambient Sensor: Inspection

  1. Visually check the ambient sensor for dirt or damage, and clean or replace as necessary.
  2. Measure the resistance between connector terminals.
    CAUTION: During inspection, be careful not to touch the sensor end in order to avoid misjudgment due to body temperature.

    Preparation tool: 

    Circuit tester

    G13200553Courtesy of SUBARU OF AMERICA, INC.
    Terminal No. Inspection conditions Standard
    1 - 2 10°C 3.09 - 3.66 kΩ
    15°C 2.47 - 2.86 kΩ
    20°C 1.99 - 2.25 kΩ
    25°C 1.62 - 1.79 kΩ
    30°C 1.29 - 1.46 kΩ
    35°C 1.04 - 1.20 kΩ
    40°C 0.84 - 0.99 kΩ
    45°C 0.68 - 0.82 kΩ
    50°C 0.56 - 0.68 kΩ
    55°C 0.46 - 0.57 kΩ
    60°C 0.38 - 0.48 kΩ
  3. Replace the ambient sensor if the inspection result is not within the standard value.