Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Basic Diagnostic Procedure: Procedure
- PERFORM CUSTOMER INTERVIEW
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Ask the customer when and how the trouble occurred using the interview check list. Refer 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.
- PERFORM BASIC INSPECTION
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Perform basic inspection.
Is the check result OK?
Yes : Go to 3.
No : Repair the faulty part found in basic inspection, and Go to 3.
- CHECK SUBARU SELECT MONITOR COMMUNICATION
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- Turn the ignition switch to OFF.
- Connect the Subaru Select Monitor to data link connector. Refer to COMMON (DIAG)>DATA LINK CONNECTOR .
- Turn the ignition switch to ON and run the Subaru Select Monitor.
- 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. Refer to COCKPIT CONTROL (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE FOR SUBARU SELECT MONITOR COMMUNICATION .
- CHECK DTC
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Read the DTC of [Cockpit Control] using the Subaru Select Monitor. Refer to COCKPIT CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Are any DTCs displayed? (Current malfunction)
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. Refer to COCKPIT CONTROL (DIAGNOSTICS)>DIAGNOSTICS WITH PHENOMENON .
- PERFORM DIAGNOSIS
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- Perform the diagnosis for the displayed DTCs.
- Repair or replace the cause of trouble.
- Using the Subaru Select Monitor, perform the clear memory of [Cockpit Control]. Refer to COMMON (DIAG)>CLEAR MEMORY .
- Execute the inspection mode. Refer to COCKPIT CONTROL (DIAGNOSTICS)>INSPECTION MODE .
- Read the DTC of [Cockpit Control] using the Subaru Select Monitor. Refer to COCKPIT CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Are any DTCs displayed? (Current malfunction)
Yes : Repeat step 5 until DTC is not shown. Go to 5.
No : Finish the diagnosis.
Use the Manual With the Right Hardware
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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.
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