E30
TerraMow
Internal Sensor Bus Communication Fault
Display shows E30; mower reports internal sensor bus error and may not start.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Shorted sensor on I²C/CAN bus, Loose sensor harness, Damaged main harness connector, Faulty main board bus driver
How to Fix / Troubleshooting
Safety: Turn OFF the mower and disconnect the battery before unplugging internal connectors.
- Visual inspection: Open the housing and inspect the main wiring harness for pinched or damaged sections.
- Check connectors: Reseat multi-pin connectors for sensor modules (tilt, rain, obstacle, wheel encoders) one at a time.
- Isolate faulty sensor (advanced): Disconnect one sensor module at a time and power ON to see if E30 clears, indicating the last disconnected sensor is faulty.
- Repair or replace: Replace the identified TerraMow sensor module or harness. If all sensors test good, the main board bus driver may be defective.
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Repair Difficulty
Professional Required
5/5
Required Part
TerraMow Main Wiring Harness
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