Di2 rear mech one gear out of phase.

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dancing james in reply to @frank9755

Can relax the high limit screw so the mech goes into the highest gear? Has the mech trim setting been set too far in?

I’d always look to get the high limit set first, then move to lowest gear and set low limit. Finally do any trim to perfect the indexing.

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frank9755 in reply to @dancing james

It's not reaching the high limit, it won't even reach the smallest sprocket.
I tried backing off the limit but it doesn't change anything. It's not the limit which is stopping it, it's its belief that there isn't another gear there / lack of the final click.

I'm pretty certain it's a software fault rather than hardware. Maybe I need to get on to shimano. Well out of warranty though.

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Matt101 in reply to @frank9755

I had something like this a while ago. Check that the trimming is in the middle and not trimmed so far to one side that it's in the next gear. Doing the factory/crash reset procedure set the trim back to the middle and I was able to reach all the gears again. Worth a try.

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