Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Di2 Synchro Shift problem

Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

Di2 Synchro Shift problem

Old 12-09-17 | 03:21 PM
  #1  
Thread Starter
Newbie
 
Joined: Dec 2017
Posts: 1
Likes: 0
Di2 Synchro Shift problem

Hi from the UK.

I've lurked here a while but have registered to post a question which I hope somebody can help with.

I have the required hardware for synchro shift and all firmware is up to date. I've been using it (and loving it) for several months now. I recently had to disconnect the battery as I removed the seat post, and on reconnecting I can't get synchro shift to work.

The button on junction box A still works (to set into bluetooth mode or adjust mech trim), but double clicking does not change between shifting modes. Its basically stuck in mode 1 (traditional shifting) which is working fine on both derailleurs, but I can't get it to change into modes 2 or 3.

I'd be very grateful if somebody could come up with a suggestion as to what I have done and how it can be fixed.

Cheers

Cornflake
Cornflake is offline  
Reply
Old 12-09-17 | 05:22 PM
  #2  
- Soli Deo Gloria -
 
Joined: Aug 2015
Posts: 14,779
Likes: 743
From: Northwest Georgia

Bikes: 2018 Rodriguez Custom Fixed Gear, 2017 Niner RLT 9 RDO, 2015 Bianchi Pista, 2002 Fuji Robaix

Things you can try...

Connect it to E-Tube and see if there are any faults, update firmware if needed.

Swap a known good junction from another bike.

Call Shimano. See https://www.shimano.com/en/company/locations.html for phone numbers.

Last edited by TimothyH; 12-09-17 at 05:26 PM.
TimothyH is offline  
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
JasonD67
Road Cycling
17
01-14-19 04:32 PM
NoWhammies
Road Cycling
30
10-02-18 06:26 AM
veloboy971
Bicycle Mechanics
5
05-04-15 05:44 AM
bikejunkie
Road Cycling
23
12-17-12 11:05 AM
FlashBazbo
Road Cycling
65
08-16-10 11:23 AM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.