ebike fault finding

Feb 29, 2012
297
178
Reading & Surgeres France.
MH
Hymer 584
Exp
15 years
Good morning,
Is there an ebike expert out there who could help with a problem please ?
I have a Kalkhoff Activity Groove with a front drive motor.
Initial power assistance is good & then restart the assistance doesn't return. It will only start again if you virtually come to a halt.
My initial thought was that the bottom bracket sensor was at fault.
I booked it into my local bike shop who liased with Kalkhoff who supplied a bottom bracket & circuit board.
FOC.
With these changed the problem still exists.
I have tried to get details of wiring to check & also what the motor sensors do but to no avail.
The next route looks to be to change the front motor but I am obviously reluctant on cost grounds.
Any ideas or advice would be so welcomed.
Thanks.
Barrie.
 
Aug 6, 2013
7,382
5,960
Kendal, Cumbria
MH
A Class
Exp
since 1999
Sorry should have reread before posting.
Should read that once you stop peddaling & restart assistance doesn't return..
It sounds more like the controller than the motor. If you get normal assistance at first then none after you have stopped pedalling the motor is fine - it's just a motor - and the controller isn't recognising the pedal sensor. Unless the controller is inside the motor - I know of at least one that is but don't know about yours.
 
Feb 28, 2016
190
83
Cornwall
MH
Eldiss autoquest 175
Exp
2015
Check the sensor is lined up. Good luck with 50 cycles if that's who you got it from, as you will need it.
 

Lenny HB

LIFE MEMBER
Oct 18, 2007
18,004
16,932
On the coast in West Sussex
MH
Hymer B678 Dynamic Line
Exp
Since 2008 & many years tugging
Have you done a search on youtube often a few experts on there.
Otherwise I think you need to get it to a Kalkhoff dealer with proper diagnostic software. That's what we have to do with our Bosch units.
 
Dec 12, 2010
2,815
4,915
Cumbria
MH
C Class
Exp
since 2011
I'm not familiar with that model, but it sounds to me like it may be the crank torque sensor that's playing up.
 

two

Aug 4, 2011
3,187
1,410
West Midlands
MH
A-Class Fiat
I'd go along to any e-bike specialist. Sounds like the torque sensor but I'm sure a competent person would be able to track down the problem very quickly. These things are not new and I find (UK) bike shops very keen and helpful.
 
OP
bjandlin
Feb 29, 2012
297
178
Reading & Surgeres France.
MH
Hymer 584
Exp
15 years
Thanks all for your comments.
I've had a look at youtube but not found anything yet.
I have tried to contact 50 Cycles but they don't seem to return email requests for information.
The cycle shop I used were very helpful & liased with Derby cycles the manufacturer in Germany.
They supplied the replacement parts FOC which was good as the bike is well out of warranty.
I have since emailed them to try get further info but no joy there .
So I'l lkeep digging.
Have had no joy with a Bafang search either.
Thanks again.
Barrie.
 

two

Aug 4, 2011
3,187
1,410
West Midlands
MH
A-Class Fiat
I wouldn't waste time with 50 Cycles. They may have traded in Kalkhoff but managed to wreck mine.
Not sure what the Activity Groove is but, if it has a Bafang, I think that's been electrified after purchase. More recent Kalkhoffs had Panasonic or Impulse drives (and, I think Bosch recently).
 
OP
bjandlin
Feb 29, 2012
297
178
Reading & Surgeres France.
MH
Hymer 584
Exp
15 years
It is original, about 2015 vintage so not an upgrade.
My first impression was a faulty bottom bracket but since that's been changed I have to look elsewhere. I've looked at multiplug pins for any signs of misalignment but would like a circuit diagram to multi meter test it through.
As you say 50 cycles were a lost cause & Kalkhoff not much better.
Ho Hum, onward we go.
Barrie
 
SMC Motorhomes Newark
RoadPro
Johns Cross
Safeguard Motorhome Insurance
Rhino Installs
Friendly professional service from qualified technicians
Free Club Stickers
Dave Newell Leisure Vehicle Services
Top