2017 Subaru WRX STIFACTORY OEM SERVICE PROCEDURE

Basic Diagnostic Procedure: Procedure

WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.
  1. PERFORM CUSTOMER INTERVIEW  .

    Ask the customer when and how the trouble occurred using the Check List for Interview. Ref. to COCKPIT CONTROL (DIAGNOSTICS)>CHECK LIST FOR INTERVIEW 

    Did you interview the customer?

    Yes  : Go to  2.

    No  : Perform the interview, and Go to  2.

  2. PERFORM BASIC INSPECTION  .

    Perform basic inspection. Ref. to COCKPIT CONTROL (DIAGNOSTICS)>GENERAL DESCRIPTION>INSPECTION 

    Is the check result OK?

    Yes  : Go to  3.

    No  : Repair the faulty part found in basic inspection, and Go to  3.

  3. CHECK SUBARU SELECT MONITOR COMMUNICATION  .
    1. Turn the ignition switch to OFF.
    2. Connect the Subaru Select Monitor to data link connector. Ref. to COMMON (DIAGNOSTICS)>DATA LINK CONNECTOR
    3. Turn the ignition switch to ON and run the Subaru Select Monitor.
    4. Select [Cockpit Control].
      NOTE:

      For detailed operation procedures, refer to "Help" of application. 

    Is communication possible?

    Yes  : Go to  4.

    No  : Check the communication circuit. Ref. to COCKPIT CONTROL (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE FOR SUBARU SELECT MONITOR COMMUNICATION>INSPECTION 

  4. CHECK DTC  .

    Read the DTC of [Cockpit Control] using the Subaru Select Monitor. Ref. to COCKPIT CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) 

    Are any DTCs displayed? (Current code)

    Yes  : Record the DTC, time stamp and freeze frame data, and Go to  5.

    No  : Perform diagnosis according to the procedures in the diagnostics with phenomenon. Ref. to COCKPIT CONTROL (DIAGNOSTICS)>DIAGNOSTICS WITH PHENOMENON 

  5. PERFORM DIAGNOSIS  .
    1. Perform the diagnosis for the displayed DTCs. Ref. to COCKPIT CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST 
    2. Repair or replace the cause of trouble.
    3. Using the Subaru Select Monitor, perform the clear memory of [Cockpit Control]. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY
    4. Execute the inspection mode. Ref. to COCKPIT CONTROL (DIAGNOSTICS)>INSPECTION MODE 
    5. Read the DTC of [Cockpit Control] using the Subaru Select Monitor. Ref. to COCKPIT CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) 

    Are any DTCs displayed? (Current code)

    Yes  : Repeat step  5 until DTC is not shown. Go to  5.

    No  : Finish the diagnosis.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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.