WARNING: This page is about a different car, the 2001 Subaru Forester and 2000 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
Refer to the manufacturer's instructions for the particular type of detector used and calibrate the instrument.
CAUTION:
Always make sure that the probe tip filter is clean and free of contamination.
Fig 1: Identifying Different Types Of Freon Detector