Video Power Outage error Bosch Gen 4 - Solved

[JoanR]

It occurs only when pedaling


Hi.
First of all, thank you for all your contributions that I have been looking at and that I have learned a lot from.
I explain my problem. I bought a few months ago a Focus Jam2 6.8 with Bosch 2020 engine and Kiox display.
For more than a month now, every time I go out, during the route I take and going at a normal speed (10-25 km / h), sometimes I see that the Kiox display "suddenly rump up" the speed to 40 -50 Kms / h and, of course, it stops the engine from giving assistance when exceeding 25kms / h, sometimes stopping. This produces a car-like sensation, as if it "cuts off" the injection momentarily without power.
That can happen for about 2 hours, up to 40-50 times.
I have updated the engine firm to V1.0.3.0 and it continues to do so.
Does anyone know what the fault may be or has someone encountered the same problem?

 

[WilkyWay]

I think it maybe a speed sensor issue.

 

[JoanR]

I think it is the electronic management of the sensor signal. When you are not pedaling, it indicates the speed well.
In other brands it is also happening

 

[Akiwi]

I had a similar issue. my magnet wasn't straight.

 

[JoanR]

I had a similar issue. my magnet wasn't straight.

Yes, I have thought about it. Perhaps the magnet is too large and the sensor detects it twice in the same reading.
Thanks for your help.

 

[Akiwi]

I will admit, mine was a little different than yours. It happened when I reached near or above 25 kmh, and the speed would start not reading correctly motor would cut out and in even when I was above 25kmh. I just straightened the magnet up, and everything was OK.

 

[JoanR]

The mechanic and I, were hypothesizing about the motor problem when we thought that maybe it could be a problem that I see the sensor magnet twice, or maybe I never see it and detect it as not present and take the motor speed to the maximum, so as not to be able to sabotage the motor.
For testing, we move the sensor magnet closer to the sensor detector and voila !!!
That was the cause. The manufacturer Shimano, when it does not detect the sensor magnet, sends an error that was E011 or E010, I do not remember exactly.
Instead Bosch takes the engine speed to the maximum so they cannot sabotage the engine. Perhaps Bosch should rethink the way to act and in any case, if it is a reading error as it was in this case, warn with an alarm and not give wrong orders to the engine.
Anyway, problem solved.
Thanks for your comments.
Best regards.