Shimano STEPS
Motor / drive
W012
Crank possibly installed in wrong direction
The system suspects that the crank arms were mounted in the wrong orientation, which distorts the torque measurement. This warning typically appears after assembly or crank service. The crank must be re-installed in the specified direction and the system restarted.
- Drive system
- Shimano STEPS
- Category
- Motor / drive
- Motor behavior
- behavior unclear
- DIY-friendly?
- shop recommended
Roadside self-help
- Restart the system once without any load on the pedals.
- If the warning returns, have the crank orientation checked and corrected by a dealer.
Possible causes
- Crank arm mounted in the wrong direction during assembly high
- Heavy pedal load at power-on confusing the sensor check medium
Symptoms
- W012 appears after crank or drivetrain work
- Assist feels wrong or restricted
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
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