Knowledge base
Hall sensor
Possible causes
- Failed Hall sensor
- Damaged Hall cable (axle exit, connector)
- Missing Hall supply from the controller
Safe test steps
- Power off and inspect connector and cable, especially at the axle exit.
- Powered, using the known pinout: Hall supply (+) to GND.
- Do all three signal wires toggle low/high when turned slowly by hand?
Workshop reference values
- Hall supply is often ~5 V (controller-specific); signals typically toggle between ~0 V and ~supply.
Repair approach
- Repair cable/connector; replace a failed sensor with the same type and orientation.
- If the Hall supply is missing, check the controller.
Tools needed
- Digital multimeter (CAT III, fused inputs)
- Back-probe pins
- Basic hand tools, insulated screwdrivers
Safety
- For tests with a spinning wheel use a secure work stand with the driven wheel raised.
- Do not try phase/Hall combinations under load.
Related verified fault codes
| Code | Meaning | Component | Reliability |
|---|---|---|---|
| Bafang 08 | Hall signal error inside the motor | Hall sensor | Per manufacturer documentation |
| SW900 LCD 24 | Motor Hall signal abnormality | Hall sensor | Widely published – may differ by model/firmware |
| S866 LCD 24 | Motor Hall signal abnormality | Hall sensor | Widely published – may differ by model/firmware |
| KT (Kunteng) 03 | Motor Hall signal abnormality (KT-LCD3 manual) | Hall sensor | Widely published – may differ by model/firmware |
| Xiaomi 18 | Motor Hall sensor fault | Hall sensor | Widely published – may differ by model/firmware |
| Segway-Ninebot 18 | Motor Hall sensor fault | Hall sensor | Widely published – may differ by model/firmware |