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.

2014 Subaru BRZ PremiumFACTORY OEM SERVICE PROCEDURE

How To Troubleshoot

Bring in the car
Next
Phenomenon check
Next

Check the diagnostic codes (Refer to CHECKING/CLEARING DIAGNOSTIC CODES )

DTC check
Clear diagnostic code

Recheck the diagnostic codes.

RESULT

Result	Go to
Fault location confirmed	A
Fault location not confirmed	B

B: Go to Step 5

A: Go to Next Step

List of diagnostic codes (main inspection parts) or troubleshooting for each code

RESULT

Result	Go to
Code output present	A
No code output	B

A: Go to Step 7

B: Go to Step 6

Inspection with SSM3 (Refer to DATA MONITOR/ACTIVE TEST )

Perform the ECM data monitor and the active test.

RESULT

Result	Go to
Fault location not confirmed	A
Fault location confirmed	B

B: Go to Step 7

A: Go to Next Step

Inspect the ECM terminal voltage and circuit (Refer to ECM TERMINAL ARRANGEMENT )
Next
Repair faulty parts
Next
Check the diagnostic codes (Refer to CHECKING/CLEARING DIAGNOSTIC CODES )
Next: Completed

Factory Service Tools

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.