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Light Control Sensor: Inspection

WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Connect the connector.
  2. Turn the ignition switch to ON, and set the lighting switch to the AUTO position.
  3. Measure the voltage between connector terminals.
    G10270682Courtesy of SUBARU OF AMERICA, INC.
    Terminal No. Inspection conditions Standard
    2 (+) - 1 (-) Measure the voltage when the area around the auto light sensor, which was dark, becomes bright. Dark condition: Approx. 0.6 V or less
    Bright condition: Approx. 3 V or more
  4. Replace the auto light sensor if the inspection result is not within the standard value.