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Eddy Current
ParticipantDid you sell it?
Eddy Current
ParticipantAny Arduino programmer, like these:
https://www.ebay.com/sch/i.html?_from=R40&_nkw=programmer+ftdi&_sacat=0&_sop=15
You need to connect +5V, GND, Tx, Rx
You can try which is Tx, Rx.
Eddy Current
ParticipantThat is the NIU programmer which we probably will not get hold of as it will be provided to service personnel only. For replacement controller you can use any programmer with FTDI chip or clones thereof. Those are only a few $/€ on sources like aliexpress or ebay.
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This reply was modified 5 years, 11 months ago by
Eddy Current.
Eddy Current
Participantjonrellim, I used the programmer to make controller boot with 3rd gear. No need for that switch.
You never used 3rd gear? How fast did your NIU run?
Eddy Current
ParticipantI tried to reset tri speed key mode to “shift” because 2017 NIUs have a gear select switch. But there is no function, switch still acts like a button. so I changed the parameter to button mode and set power-on gear to 3, which I find handy.
Next I will try to stop the moped from behaving like a wild horse. Setting thottle response to “soft” did not yield any effect, so I will play with upper and lower throttle voltages.
Eddy Current
ParticipantNo, deisconbnect green, red and blue wires from controller. Measure Ohms between green and blue wires, green and yellow, blue and yellow. Should all be similar values, probably way below 100. If not, one ore more coils are shortened or disconnected.
If there is any defect’in the motor you will need to have it replaced.
Eddy Current
ParticipantChances are that motor phase cables, the thick wires , are connected wrong. You may want to check if colors match those of your controller’s connectors. While doing that you can check the coils. Resistance of any pair of green/yellow/blue should match.
Eddy Current
ParticipantSame here with 2017 model. Does side stand switch work?
Eddy Current
ParticipantSee my post #1399 above. Most offers let you choose between pre 03/2018 and post 03/2018 models.
Eddy Current
ParticipantYou can test the sensors with a voltmeter. Like in this video:
<h1 class=”fn product-title”><span style=”font-size: 12pt;”>https://www.youtube.com/watch?v=oZHoF9S5u0E</span></h1>
Eddy Current
ParticipantIs controller LED flashing? If so you can look up the failure codes in this post:
There is also a good but somewhat outdated technical manual on the Dutch NIU site.
Eddy Current
Participant[quote quote=1456]Were you able to successfully connect the ECU? I got mine today but I have no idea what to do with these both connectors. I Installed it and I got error 191 on the display and READY sign is already there on without pressing green button to activate it. NIU is not starting to ride Any idea? Thanks, Lucas[/quote]
Those 6 pin white connectors are for motor hall sensors. From your photo I guess that you have a post 03/2018 Niu. Do as pictured.
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ParticipantYep, your version worked. Thank you. I thought I had all versions.
Eddy Current
ParticipantNot same product, I got HJ3A model from ebuy. It is a single replacement controller plus some adapter box.
HJ3A does not have extra 6 pin socket for motor hall sensors.
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ParticipantEbuy7 back orders from Taobao sellers. Took 4 working days, including 2 days shipment within China. Express from Honkong was another two days, so count on 10 days door to door.
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This reply was modified 5 years, 11 months ago by
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