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.
Using the Check List for Interview, ask the customer the condition of how the trouble occurred. Refer to MULTI-FUNCTION DISPLAY(DIAGNOSTICS)>CHECK LIST FOR INTERVIEW>CHECK .
Did you interview the customer?
Yes: Go to 2.
No: Interview the customer. Refer to MULTI-FUNCTION DISPLAY(DIAGNOSTICS)>CHECK LIST FOR INTERVIEW>CHECK .
- CHECK CAN COMMUNICATION.
Read the DTC of the CAN system using the Subaru Select Monitor. Refer to LAN SYSTEM (DIAGNOSTICS)>READ DIAGNOSTIC TROUBLE CODE (DTC)>OPERATION .
Are any DTCs displayed?
Yes: Perform the diagnosis for the displayed DTCs. Refer to VEHICLE DYNAMICS CONTROL (VDC) SYSTEM (DIAGNOSTICS)>LIST OF DIAGNOSTIC TROUBLE CODE (DTC)>LIST .
No: Go to 3.
- CHECK MFD.
Read the DTC relating the MFD using the Subaru Select Monitor. Refer to MULTI-FUNCTION DISPLAY(DIAGNOSTICS)>READ DIAGNOSTIC TROUBLE CODE (DTC) .
Are any DTCs displayed?
Yes: Record the DTCs and time stamps, and perform the diagnosis for the displayed DTCs. Refer to BODY CONTROL SYSTEM (DIAGNOSTICS)>LIST OF DIAGNOSTIC TROUBLE CODE (DTC)>LIST .
For time stamp, refer to "LAN SYSTEM". Refer to LAN SYSTEM (DIAGNOSTICS)>GENERAL DESCRIPTION>CAUTION>TIME STAMP .
Go to 5.
No: Go to 4.
- CHECK MFD.
Check the MFD display using the system operation check mode of combination meter. Refer to MULTI-FUNCTION DISPLAY(DIAGNOSTICS)>SYSTEM OPERATION CHECK MODE .
Is the check result OK?
Yes: System is normal.
No: Replace the MFD. Refer to INSTRUMENTATION/DRIVER INFO>MULTI-FUNCTION DISPLAY (MFD) .
- PERFORM DIAGNOSIS.
- Perform the Clear Memory Mode.
- Perform the Inspection Mode. Refer to MULTI-FUNCTION DISPLAY(DIAGNOSTICS)>INSPECTION MODE .
- Read the DTC relating the MFD using the Subaru Select Monitor.
Are any DTCs displayed?
Yes
Perform the diagnosis for the displayed DTCs.
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.