Shimano STEPS
System / software
E043
Firmware on this product possibly corrupted
The system has detected an abnormality in the firmware of a component; part of the firmware may be corrupted. Assist is disabled until the firmware is restored with Shimano's diagnostic tools, which requires a dealer or distributor. Corruption of this kind is often the result of an interrupted update process.
- Drive system
- Shimano STEPS
- Category
- System / software
- Motor behavior
- assist off
- DIY-friendly?
- shop recommended
Roadside self-help
- Restart the system once; if E043 remains, contact your dealer — the firmware must be restored professionally.
Possible causes
- Corrupted firmware data on the component high
- Update process interrupted (power loss, connection drop) medium
Symptoms
- No assist while riding
- Error persists across restarts
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- dealer diagnostic tool required
- Component: firmware
- Component: system electronics
Applies to
E5000
E6000
E6100
E7000
E8000
EP8