IBST family
IBST_a129_loadDumpOnFSLTest
Not Available
What does the IBST_a129_loadDumpOnFSLTest alert mean?
iBooster (IBST) detected a load dump event before or during Bridge Main Switch (BMS) Fail Safe Logic Test (FSLT).
What you'll see in your Tesla
- Not Available
What triggers it
IBST detected a load dump event before or during BMS FSLT.
When it clears
iBooster can not recover from this condition. iBooster replacement may be required.
Potential impact
IBST may not operate as expected.
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
Track your Tesla's alerts automatically
Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.