Anyone know the wiring on Panasonic Mid Motors?

Panasonic NUA type. Person sold me it saying it works but wires need fixing.

Screen connector had some lose wires, found a pic to make sure which holes they came out of, reconnected them all except the blue from the screen which goes to an empty slot on the connector, and all the remaining wires from the controller to the screen connector had nothing on the screen end to connect to so god knows what they're for.

Found a pic saying the red black grey is the throttle. For the power wires there's an extra grey wire kicking out about 4.5v. Dunno if it's for a sensor on the battery or software switch or what. Black and grey wire connector also a mystery, 4.6v on grey, along with another 3 pin one in black yellow red, cant sense anything on them, guessing they're for brake cut off and lights or such things. Wires for the screen have a cut yellow wire half way along that was hidden behind shrink wrap, no idea what it's for, 4.9v on it though.

Main issue is with screen and throttle connected, and 10s lipo connected, nothing happens. Hold the power down on the screen but nothing at all. Are any of the extra wires a software switch that needs to be connected in order for it to turn on? Anyone experienced with these know? Can't find much of anything googling it. Any assistance would be supremely appreciated.

Hi Arkz, Even though you have given quite a bit of information and a photo, without a circuit diagram or manual it is hard to analyse from a distance.
Hopefully somebody who has access to documentation on this motor will read your post and respond. (I guess you have already searched on the internet for circuit diagrams etc?)
Meantime, do you know what voltage the motor was designed for? If you are supplying too high or too low voltage there might be an over-volt or under-volt protection that has cut in, even though it is outputting approx 5V on some of the wires so is obviously at least partly working.
Possibly the spare black/grey pair would go to a key switch and connecting them together would power the display, but without knowing for sure, it is hard to know if it would be a good idea to try that...
Check for voltage on wires going to the display: you say the display doesn't come on, but is there voltage supplying it? With a bit of luck all the black wires are common negative (0V), so connect the - probe of your meter to a black and go looking for voltage on all the other wires.
Note down anything you find, and maybe it will start to make sense.
If no voltage on any of the wires heading to the display, you might have to look inside the cases to trace what is happening. Or you might find voltage on a wire heading towards the display but not connected to the display.. maybe the colours were not continuous at the connector. Etc etc..
The more you learn, the more chance you have of figuring it out.

Good Luck!

Yeah I've looked all over the place. I found someone saying the grey and black in a speed sensor, I'm guessing for the speed governor to limit you correctly. Dunno what the others are yet. Seller said 36v, and the screen does say 36v on the back. I'm still digging. I don't really want to end up just buying a new controller for it as that's even more expense and I wanted to at least be able to use the screen that came with it. Shops that sell the screens for controllers always seem very expensive for the simple things that they are. I mean you could get a decent specced budged tablet for that money, seems ridiculous.

Upon even further digging I've found PDF docs in German that say the grey and black are a speed sensor, and the red yellow black are for a lighting assembly. Seems odd that none are for brake cut off switches. extra wires going to screen are still a mystery too. I contacted the seller who said it works, and he spun me a lovely tale of how he bought it from Germany 2 years ago in this condition and never used it but that seller told him it worked... Yeah. I've taken a pic of the controller, but with it being sealed with that water tight jelly stuff obviously I can't see the mosfets on the other side that are most certainly using the back plate to distribute heat. So dunno if there's something blown.

So really all I can guess is either the controller is faulty, or the screen is. Though odd that as soon as you provide power it starts outputting the 5v+/- for the throttle despite no signs of even being turned on. As it stands I'm just gonna use a cheap controller from ebay to run the thing. And leave the old controller sealed in there. Still, would have been nice to have a screen, though it's probably less sophisticated than the s-lcd3 on my main bike anyway.

I'll upload the board pic just for anyone curious or for reference.


The forum is scaling the image, so save or view in a separate tab to see it in its high res glory.

I am not a specialist but it seems to me that this is not the right console, there are 2 types of console (screen) for this engine 1 with LED only and one with a very small LCD display.

look at this document in French with the lcd screen !! :

http://www.cycleurope.fr/espace-vae/wa_files/INS-OP-69-Rev01 FR_Recherche_20des_20pannes_20du_20VAE_20Panasonic_2036V_20Hybrid_20Display.pdf

in this doc (PDF) :

Red - Yellow - Black = Light circuit

Grey - Black = speed sensor

Agreed, I think they've just bundled a random screen from a different model.

DID YOU GET ANY REPLAY ?