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.
Ask the customer when and how the trouble occurred using the interview check list. Ref. to DRIVER MONITOR (DIAGNOSTICS)>CHECK LIST FOR INTERVIEW .
Did you interview the customer?
Yes: Go to 2.
No: Perform the interview, and Go to 2.
- BASIC INSPECTION.
Perform basic inspection. Ref. to DRIVER MONITOR (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.
- CHECK SUBARU SELECT MONITOR COMMUNICATION.
- Turn the ignition switch to OFF.
- Connect the Subaru Select Monitor to data link connector. Ref. to COMMON (DIAG)>DATA LINK CONNECTOR .
- Turn the ignition switch to ON and run the Subaru Select Monitor.
- Select [Driver Monitor].NOTE: For detailed operation procedures, refer to "Help" of application.
Is communication possible?
Yes: Go to 4.
No: Check the communication circuit. Ref. to DRIVER MONITOR (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE FOR SUBARU SELECT MONITOR COMMUNICATION .
- CHECK WARNING LIGHT/INDICATOR LIGHT.
Check the warning light and indicator light of the driver monitoring system.
Is the warning light or indicator light of the driver monitoring system illuminating?
Yes: Go to 5.
No: Driver monitoring system is currently normal. Finish the diagnosis.
- CHECK WARNING LIGHT/INDICATOR LIGHT.
Check the warning light and indicator light of the driver monitoring system.
Is the driver monitoring system warning light (yellow) illuminating?
Yes: Go to 6.
No: Perform diagnosis according to the procedures in the diagnostics with phenomenon. Ref. to DRIVER MONITOR (DIAGNOSTICS)>DIAGNOSTICS WITH PHENOMENON .
- CHECK DTC.
Read the DTC of [Driver Monitor] using the Subaru Select Monitor. Ref. to DRIVER MONITOR (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Are any DTCs displayed? (Current malfunction)
Yes: Record the DTC, time stamp and freeze frame data, and Go to 7.
No: Perform diagnosis according to the procedures in the diagnostics with phenomenon. Ref. to DRIVER MONITOR (DIAGNOSTICS)>DIAGNOSTICS WITH PHENOMENON .
- PERFORM DIAGNOSIS.
- Perform the diagnosis for the displayed DTCs. Ref. to DRIVER MONITOR (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .
- Repair or replace the cause of trouble.
- Using the Subaru Select Monitor, perform the clear memory of [Driver Monitor]. Ref. to COMMON (DIAG)>CLEAR MEMORY .
- Execute the inspection mode. Ref. to DRIVER MONITOR (DIAGNOSTICS)>INSPECTION MODE>PROCEDURE .
- Read the DTC of [Driver Monitor] using the Subaru Select Monitor. Ref. to DRIVER MONITOR (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Are any DTCs displayed? (Current malfunction)
Yes: Repeat step 7 until DTC is not shown.
No: Finish the diagnosis.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.