Test Methods

Temporarily attach the ST to a suitable place in the driver's compartment, remove the blind plug located in front of the toe board and pass the hose of the ST to engine compartment.
ST 498575400 OIL PRESSURE GAUGE ASSY

Fig 1: Attaching ST To Suitable Place In Driver's Compartment
Courtesy of SUBARU OF AMERICA, INC.
Remove the test plug and install the ST instead. ST 498897200 OIL PRESSURE GAUGE ADAPTER

Fig 2: Removing Test Plug & Installing ST
Courtesy of SUBARU OF AMERICA, INC.
Connect the ST1 with ST2.
ST1 498897200 OIL PRESSURE GAUGE ADAPTER

ST2 498575400 OIL PRESSURE GAUGE ASSY
Check for duty ratio changes by opening and closing the throttle valve using Subaru Select Monitor.
1. Insert the cartridge to Subaru Select Monitor. Refer to PREPARATION TOOL , General Description.
  
  Fig 3: Inserting Cartridge To Subaru Select Monitor
  Courtesy of SUBARU OF AMERICA, INC.
2. Connect the Subaru Select Monitor to data link connector.
Check the line pressure in accordance with the following chart.