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Hi guys! I am extremely surprised that no one seems to clearly find my measurements normal or abnormal, that no one seems to find it normal or abnormal that my measurements are asymmetric, or that there is voltage when the bike is idle. Is this just a misunderstanding somewhere in the...

Meta message for those who are interested in my motivation and my partner's situation I'll explain why I made the decision to try and fix the bike myself. First off, it's not a mountain bike, it's an urban bike. My partner was planning to use it to get around, run errands, go to work, etc...

Thanks a lot for the reply! I would love to understand, in order to learn and be more able over time. Could you please explain why you think this test is useless? The measurements I made look like a normal controller behaviour?

Hi guys! Thanks a lot for the help! I added another measurement to the first message in this thread. I tested with phase wires connected, and everything idle. I still got 13V. See above. The goal was to be closer to real life. With these new pieces of information, can we conclude that...

Thanks a lot for the reply, and for these hints! I agree 100%, I would love to be able to plug a known good controller. The thing is, I don't have any at hand. I could buy one, but apart from the money matter, I feel like it would also be a waste of many resources if my controller is not the...

Hi there! I made more tests on the controller, and created a new discussion, because I think it can be a standalone topic. Here it is: https://forums.electricbikereview.com/threads/are-these-normal-phase-wire-voltages.58284/ Cheers!

Hi there! As I am trying to troubleshoot a problem on my electric bike, and got stuck, I tried measuring the voltage on the phase wires, to know whether my controller is faulty. I would like to know whether that looks normal or abnormal to you, since I have no idea what the correct values are...

Hi guys, I have new info! I am hopeful that this will be enough for you to know what's wrong, especially the new observations I made with motor running without wheel. Summary: 1. I was able to fully reproduce the behaviour with bike upside down 2. I did more tests to try and find a bad...

Hi guys! So I got back home and resumed testing. Unfortunately, still no clue what is wrong. First I tested transistors, they seem fine: Second I tried swapping phase wires. Most combinations didn’t seem to start the motor at all, and the last one seemed to make it harder to pedal than...

Thanks a lot for your replies and your help! I'll check again the solder joints. But theoretically, shouldn't that already be good since the controller is receiving the correct voltage from the hall sensor wires as I turn the wheel? About pedal assist sensor, I checked it unfortunately. It's...

Hi there! Here are the news. I spent a weekend on this bike. The general conclusion is that I didn’t spot anything that seemed to explain the problem. I checked continuity of the whole hall sensor loop. I checked continuity of all wires coming in and out of the controller. I opened up the...

Thanks A LOT for your help guys, I really appreciate it! About brake cutoffs: good idea. I disconnected them entirely, to rule this possibility out, and unfortunately they're not the culprits. About hall sensor feedback, it is really interesting to know that this possibility comes to your...

I have new data, freshly arrived from my latest test: actually when the symptom happens, meaning I pedal, motor starts, I stop pedalling, motor stops, I start pedalling again and motor doesn't kick in again, I just noticed that if I stop the bike completely, meaning I reach speed 0 mph, and...

Thanks a lot for the swift reply! I can imagine how that could create the grinding noise, but I don't see how that could cause the temporary power outages. Do you think it could be related? Thanks again very much for the help!

Hi there! My partner’s electric bicycle is no longer working properly. The symptoms evolved, but to summarize today’s situation, when riding it after stopping to pedal, motor often won’t turn back on, unless we bring the bike to a standstill. And when motor is on, it makes a lot of noise...