DTC B15EC: Backup Battery Degradation [06/2018 - 10/2019]: 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 DTC
- Turn the power switch off.
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG) and wait for 10 seconds.
- Turn the Techstream on.
- Clear the DTCs.
Body Electrical > Telematics > Clear DTCs
- Recheck for DTCs.
Body Electrical > Telematics > Trouble Codes
Result
Result Proceed to DTC B15EC is output A DTC B15EC is not output B
Result:
A
REPLACE BUB (BACK-UP BATTERY). Refer to REMOVAL [06/2018 - 10/2019]
Result:
B
CHECK FOR INTERMITTENT PROBLEMS. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]