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Home >> Subaru >> 2013 >> Legacy Premium, Automatic CVT Trans >> Repair and Diagnosis >> Engine Mechanical >> Auxiliary Emission Control Systems >> Emission Control Systems (Aux. Emission Control Devices) (H4DO) >> Leak Check Valve Assembly >> Inspection >> Check Vacuum Pump

Check Vacuum Pump

  1. 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.
    Fig 1: Checking Vacuum Pump Operation
    G07664953Courtesy of SUBARU OF AMERICA, INC.
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