IBST-D109
IBST_d109_micInitSpiTransfErr
Also written as IBST_D109 / IBST D109 / IBST_d109_micInitSpiTransfErr / ibst_d109_micinitspitransferr
Why does the exact Tesla alert ID matter?
Record the exact alert ID, including underscores, suffixes, and companion alerts. Tesla alerts that look similar can point to different modules, timestamps, and service procedures.
What does IBST-D109 mean?
Tesla diagnostic code in the Integrated Brake System (IBST) module. The data transfer to the application-specific integrated circuit (ASIC) (System / Valve / RFP ASIC) through the Serial peripheral interface (SPI) lines has failed during initialization. This could indicate a defect in the ASIC (system ASIC/Valve ASIC/RFP ASIC), SPI line interruptions, or that the wrong data is being sent to the ASIC.
Original Description
The data transfer to the application-specific integrated circuit (ASIC) (System / Valve / RFP ASIC) through the Serial peripheral interface (SPI) lines has failed during initialization. This could indicate a defect in the ASIC (system ASIC/Valve ASIC/RFP ASIC), SPI line interruptions, or that the wrong data is being sent to the ASIC.
Affected Tesla Models
What You May Notice
- Integrated Brake System alert: The data transfer to the application-specific integrated circuit (ASIC) (System / Valve / RFP ASIC) through the Serial p
- No noticeable change in braking performance under normal driving
How to Diagnose and Resolve
- 1 Reboot the vehicle
- 2 Monitor over the next few drives
- 3 Schedule service if the alert reappears
Severity Notes
IBST-D109 is a diagnostic or informational code in the Integrated Brake System system. Typically no immediate action is required.