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
Steering Lock System DTCS
STEERING LOCK SYSTEM DIAGNOSTIC TROUBLE CODE IDENTIFICATION
| Diagnostic codes | Diagnostic items | Diagnostic code output check operation | Reference |
|---|---|---|---|
| B2781 | [Steering Lock ECU Open/Short] | No output verification required (constantly detected) | DTC B2781 Steering Lock ECU Open/Short |
| B2782 | [Steering lock power supply circuit abnormal (smart ECU-side abnormal)] | Steering lock/unlock operation (Lock: When the door is opened while the shifter is in the P position (Transmission A/T) and the vehicle is set to IG OFF and ACC OFF. [Unlock]: The electrical key transmitter SUB-ASSY (Electronic key) is being carried and the vehicle is set to ACC ON or IG ON. |
DTC B2782 Steering lock power supply circuit malfunction (Smart ECM-side malfunction) |
| B2788 | [IGN2 input abnormal] | No output verification required (constantly detected) | DTC B2788 IGN2 input malfunction |
Factory Service Tools
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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.