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.
2017 Subaru BRZ Limited, Automatic TransFACTORY OEM SERVICE PROCEDURE
Lin Communication System DTCS
LIN COMMUNICATION SYSTEM DIAGNOSTIC TROUBLE CODE IDENTIFICATION
| Diagnostic codes | Diagnostic items | Reference |
|---|---|---|
| B2321 | [D seat P/W ECU communication suspension] | DTC B2321 Lost communication with Driver's P/W ECM |
| B2325 | [Door system LIN communication bus abnormal] | DTC B2325 Door system LIN communication bus error |
| B2785 | [LIN communication error] | DTC B2785 LIN communication error |
| B2786 | [No Response from Steering Lock ECU] | DTC B2786 No response from steering lock ECM |
| B2789 | [No response of the ID code box] | DTC B2789 No response from the ID code box |
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.