Update firmware on a Shimano STEPS system with an EW-EN100 junction

The EW-EN100 was one of the first STEPS units that could be updated from the phone. E-TUBE Project handles the junction, drive unit and battery over Bluetooth.

Step by step

1. Charge to at least 50 %. Connect E-TUBE Project.
2. Open [Firmware update]; the app lists units with newer firmware.
3. Update the EW-EN100 first if listed, then the drive unit and battery. Keep the phone within a metre.
4. Switch the bike off and on after the last update and re-check assist settings.
5. Units marked 'dealer only' need the wired SM-PCE02 update at a shop.

Can't find it?

Update fails at the same point: disable battery saver for the app, keep the screen on, and try another phone. Wired dealer update is the fallback.

Frequently asked

Manuals and video

• Shimano Manuals & Technical Documents (official)
• Shimano user manuals (SI)

Videos found on YouTube and checked automatically; they are other people's work, not ours.

• Shimano E-Tube Project Mobile App 4.0.0 Update // New Di2 Firmware Updates Shane Miller - GPLama
• Shimano Firmware Updates Really Are So Simple! Electric Mountain Bike Network
• Update Your Polygon EBike with E-Tube App - T6E Firmware Update Jason Hermann - Over 40 Adventures

Other Shimano STEPS EW-EN100 junction (no display) + E-TUBE Project app guides