DTC B2277: Detecting Vehicle Submersion [06/2018 - ]: Procedure
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, 2021 Lexus ES 300h, and 2020 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK WATER INTRUSION
- 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 [06/2018 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]
Result:
B
TAKE MEASURES AGAINST WATER INTRUSION AND REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to REMOVAL [06/2018 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]
- Check that the certification ECU (smart key ECU assembly), its ground area and wire harnesses have no signs of water intrusion.