DTC B2277: Detecting Vehicle Submersion: Procedure

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTC OUTPUT
1. Delete the DTC. Refer to DTC CHECK / CLEAR .
  HINT:
  
  After all DTCs are cleared, check if the trouble occurs again 30 seconds after the engine switch is turned on (IG).
2. Check for DTCs again.
  OK
  
  No DTC is output.
NG → REPLACE POWER SOURCE CONTROL ECU

OK → END