Check Vacuum Pump
WARNING: This page is about a different car, the 2013 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
- Connect the battery positive terminal to terminal No. 3 and the battery ground terminal to terminal No. 4, and inspect the vacuum pump operation.
CAUTION:
Do not operate the vacuum pump for 5 minutes or more.
Courtesy of SUBARU OF AMERICA, INC.