The symptom
After a collision, a grab, or any external force to the head, the Go2’s 4D LiDAR unit stops rotating — and with it goes obstacle avoidance and mapping.
The official sequence
- Wait. Per the manual, the LiDAR normally resumes rotation on its own after an external force stops it. Give it a moment before touching anything.
- Nudge it by hand. If it doesn’t self-recover, gently rotate the LiDAR turret by hand to free it, then restart the robot.
- Check the fault log. After restart, look at the fault details in the app; if the LiDAR still isn’t rotating or the fault persists, contact after-sales (support@unitree.cc).
What not to do
Don’t disassemble the head to “clean the motor” — unauthorized disassembly voids Unitree’s warranty, and the sensor assembly is not a user-serviceable part. If the turret physically grinds, wobbles, or sits visibly tilted after an impact, that’s damage, not debris: document it with photos and go straight to support or your dealer.
A working LiDAR matters more on the Go2 than on most robots — the 360°×96° hemispherical unit is standard even on cheap trims and is the core of everything autonomous the robot does. Treat head impacts as service events, not cosmetic ones.