Worrying Shimano Problem

OldPedaller

Pedelecer
Aug 20, 2011
42
9
I wonder if anyone here has had the same issue I've just experienced with the Shimano Steps E6000 on my Merida bike.

Three or four weeks after its last use, I got my bike out ready to go for a ride. Slotted the computer display into its holder, pushed the button and - nothing.
So of course checked the battery charge state - Full.
Checked all accessible wiring - no breaks
Checked the wires that go into the back of the display unit - - tightly fitted.
Checked the connection between the display unit and its holder - no corrosion or visible damage.

As we have two bikes, I then tried my display unit on the other bike. Same result.
Then tried the unit from the other bike on my bike - Display lights up; good to go.
Conclusion (or so I thought) - the display unit is faulty and would need to be replaced.

Put a sticker on my unit so I wouldn't get them mixed up.
Started a search for a replacement unit and found it.
Then (no idea why - maybe because I was resisting parting with the £105 - I tried the unit one more time on my bike.
It lit up, but the computer seemed to have "lost" the stored information - e.g. Total mileage, last trip mileage etc. Everything reset to zero.
But had a ride with no problems.

Next day, put the display unit in and magically all the original information (i.e. 6000+ miles on the odometer, etc) reappeared.

Now of course I'm happy that it's working, but just a bit worried that there may be a major fault lurking down in the Shimano computer in the crank.
Or maybe just a faulty connection from the Shimano unit in the crank to the display unit. Or something else?

Has anyone else had this happen with a Shimano drive?

Or has a theory what's the likely cause?

(I'm happy to take it into a Merida dealer about 35 miles away, but not sure what can be done if it's working. The nearest Shimano specialist is 120 miles away)
 

OldPedaller

Pedelecer
Aug 20, 2011
42
9
Thanks for the quick reply.

Maybe I'm reading it wrong, but is the battery referred to on page 57 not the the main ebike battery?

Where it says:
"Cause/Possibility: The amount of battery charge may be insufficient.
Remedy: Recharge the battery then turn on the power once more."

Sounds to me more like it's the bike battery being referred to.

It's the "recharge the battery" that makes me doubt. There's no removable /rechargeable battery on/in the display unit that I can see.

Or is it that simply leaving the display unit on the bike that has a fully charged battery will recharge the LCD's battery?
 

soundwave

Esteemed Pedelecer
May 23, 2015
16,919
6,516
Or is it that simply leaving the display unit on the bike that has a fully charged battery will recharge the LCD's battery?

yes as imo it has a internal rechargeable batt inside the display that got low on charge.