DTC B2277: Detecting Vehicle Submersion: Procedure

CHECK WHETHER DTC OUTPUT RECURS
1. Clear the DTCs. Refer to DTC CHECK/CLEAR .
2. Check whether DTC B2277 recurs 30 seconds or more after the engine switch is turned on (IG).
  OK
  
  No DTC is output.
NG → REPLACE MAIN BODY ECU

OK → END (SYSTEM IS OK)