Quick Self Test Error
The BMS power-on quick self-test flagged a subsystem before going online — e.g. cell measurement ('Cells Failed') or the pack-I/O ADC ('PackIO ADC Failed').
What it means
The BMS power-on quick self-test flagged a subsystem before going online — e.g. cell measurement ('Cells Failed') or the pack-I/O ADC ('PackIO ADC Failed').
Warning — Monitor the situation, may self-resolve.
Likely causes
- A transient self-test miss at boot
- A failing cell-measurement or pack-I/O subsystem if repeated
What to do
- 1An isolated failure at boot can be transient
- 2Repeated failures of the same subsystem point to a hardware issue on that pack
- 3Have the pack inspected if it persists
Which bikes use this table
Recorded in the binary log rather than shown on the dash — every generation writes them.
Related codes
Other log file Battery/BMS codes:
Dashboard codes for the same subsystem:
Questions
What does "Quick Self Test Error" mean in a Zero log?
The BMS power-on quick self-test flagged a subsystem before going online — e.g. cell measurement ('Cells Failed') or the pack-I/O ADC ('PackIO ADC Failed'). It is written by the BMS. It is classed as warning: monitor the situation, may self-resolve.
What should I do about it?
An isolated failure at boot can be transient. Repeated failures of the same subsystem point to a hardware issue on that pack. Have the pack inspected if it persists.
See when this actually happened on your bike
A dash code tells you the fault; the log tells you the pack temperature, the state of charge and the ten minutes leading up to it.
Sources:
Community reference: ZeroManual wiki entry
The code and its name are transcribed from Zero's own owner manuals; the severity, category and troubleshooting notes are ours. For official diagnostics, consult an authorized Zero Motorcycles dealer.