WARNING: This page is about a different car, the 2003 Subaru Outback, 2003 Subaru Legacy, and 2003 Subaru Baja. However, it is still accessible from the selected car via links, so may be relevant.

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.
1. ST 498575400 OIL PRESSURE GAUGE ASSY
Fig 1: Removing Blind Plug In Front Of Toe Board
Courtesy of SUBARU OF AMERICA, INC.
Remove the test plug and install the ST instead.
1. ST 498897200 OIL PRESSURE GAUGE ADAPTER
Fig 2: Removing Test Plug
Courtesy of SUBARU OF AMERICA, INC.
Connect the ST1 with ST2.
1. ST1 498897200 OIL PRESSURE GAUGE ADAPTER
2. 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. < Ref. 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.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Test Methods

Use the Manual With the Right Hardware

When to See a Mechanic

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