STIHL RMI 422: M1170 — Signal error

What this fault means

The iMOW cannot detect the required docking-station/boundary signal.

Safety: Stop the mower and follow the manufacturer safety instructions before physical inspection.

Step-by-step checks

1. Confirm the docking station is powered and switched on.
2. Inspect station status and visible boundary-wire connections.
3. Check for recent cable work, cuts or damaged splices.
4. Test whether the fault occurs everywhere or only one part of the lawn.
5. Persistent M1170 with a known-good loop should be escalated as station/mower signal electronics.

Evidence source: Manufacturer/support reference

Evidence checked 2026-08-25. Diagnostic procedures are labelled separately from manufacturer-exact error instructions.

Did one of these checks actually fix the mower?

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