DTC B2277: Detecting Vehicle Submersion [12/2019 - 11/2023]: Procedure

1. Check that the certification ECU (smart key ECU assembly), its ground area and wire harnesses have no signs of water intrusion.

   Result

   Result	Proceed to
   No sign of water intrusion found	A
   Signs of water intrusion found	B

Result: 

A 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [12/2019 - 11/2023] 

Result: 

B 

TAKE MEASURES AGAINST WATER INTRUSION AND REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [12/2019 - 11/2023]