Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc b2277 submerging circuit

Subaru Legacy BN/BS (2015-2019) Service Manual / Keyless access with push button start system (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc b2277 submerging circuit

DTC DETECTING CONDITION:

When the water-submersion detection circuit integrated into the keyless access CM detects the water submersion.

TROUBLE SYMPTOM:

• The ignition can be turned ON, but cannot be turned OFF.

• Engine will not start.

CAUTION:

For replacement procedure of keyless access CM, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

STEP	CHECK	YES	NO
1.CHECK LAN SYSTEM. Inspect LAN system. Basic Diagnostic Procedure > PROCEDURE	Is LAN system normal-	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2277 SUBMERGING CIRCUIT	Perform the inspection according to the diagnosis for LAN system.
2.CHECK SUBMERSION CONDITION. Check the keyless access CM 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 CM. Keyless Access CM	Replace the keyless access CM. Keyless Access CM

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Removal
1. Remove the transmission from the vehicle. Automatic Transmission Assembly > REMOVAL2. Remove the extension case. Extension Case > REMOVAL3. Remove the rear drive shaft. Rear Drive Shaft > REMOVAL4. Remove the transfer clutch assembly. Transfer Clutch > REMOVAL5. Remove the transfer reduction ...