Hello,

After buying a scooter in a running condition but with a charger out of order, I replaced the batteries and the charger, but I now have a sudden acceleration defect. Could you help me please? I have added the history below:

phase 1: scooter purchase

scooter from 12/02/2010, lithium MPtech model

defective charger 1004061 V19NFD

- replacement of batteries from elements of the latest generation Nissan Leaf

---> rolling test OK

phase 2: purchase of the replacement charger April 2025

model: 1004251 gold-colored case

previously installed on a lithium model,

- installation of the charger

---> impossible to start

recovery of the original charger CPU card 1004061 V19NFD + identical modification

--> start OK, charge OK

---> but 2 problems noted:

1 - when the charger is connected (via J3) at some point, the key lights up on the dashboard, but no error when connecting the diagnostic program

2 - at acceleration depending on the position of the wheel, nothing happens, or the engine growls without moving. Just turn the wheel a little so that the acceleration is normal.

Do the software versions need to be updated?

Currently:

Other information from the diagnostic tool:

I agree :) !

Following a connection error ( 230VAC on the signal input) the transistor, 2 CMS resistors and copper tracks burned.

correction : 230VAC from filter

Hello Zvolt,

Thank you for your suggestion.

I also have page 4/5. It's the only one I could find on specialized forums.

I found four shorted power MOS transistors IXYS and a Darlington transistor TIP120. I'll replace them tonight.

However, I caused a fault by making a wiring error when connecting the filter upstream.

I blackened some copper traces, and I'm going to have a hard time repairing this part without a diagram or model.

I'll take a photo to help you locate this fault.

Sincerely,

Lionel