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.
DTC B2277 Submerging Circuit: Trouble Symptom
2016 Subaru Legacy 2.5iSECTION Trouble Symptom
- The ignition can be turned ON, but cannot be turned OFF.
- Engine will not start.
CAUTION:
For replacement procedure of keyless access control module, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.
DIAGNOSTICS PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK LAN SYSTEM. Inspect LAN system. < Ref. to PROCEDURE , Basic Diagnostic Procedure. > |
Is LAN system normal? | Go to step 2 . | Perform the inspection according to the diagnosis for LAN system. |
| 2 CHECK SUBMERSION CONDITION. Check the keyless access control module and environment of equipment, and check the harness for any trace of water submersion. |
Is there any trace of water submersion? | Take necessary measures against water submersion and replace the keyless access control module. < Ref. to KEYLESS ACCESS CONTROL MODULE . > | Replace the keyless access control module. < Ref. to KEYLESS ACCESS CONTROL MODULE . > |
RENDER: 1.0x
NO RELATED
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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.