HELP, Max firmware 8.1.8 has an extra security measure built into the battery that affects the ESC and dash.........

rasmus14
Posts: 4
Joined: Sat Apr 10, 2021 8:38 pm

HELP, Max firmware 8.1.8 has an extra security measure built into the battery that affects the ESC and dash.........

Postby rasmus14 Fri Mar 11, 2022 12:39 am

HELP

Max firmware 8.1.8 has an extra security measure built into the battery that affects the ESC and dash. I have a Max with this battery firmware, it'll shut down the scooter once it detects a load on the motor. When I bench tested inside my shop, I had no issue running at 18mph. Put it back together and went for a test ride, and 10 secs later, beep and shutdown.
Has anyone else encountered this and maybe found a workaround or another solution??
PotatoBill
Posts: 5
Joined: Mon Apr 25, 2022 12:43 am

Re: HELP, Max firmware 8.1.8 has an extra security measure built into the battery that affects the ESC and dash.........

Postby PotatoBill Fri Apr 29, 2022 4:22 am

Ive read if you flash the dash with 1.10 or 1.14 and not 5.5.5 you can use some of the tools like xaioflasher or iap to flash the BMS to 1.34 but I've never tried. What I know works for sure is using/flashing with st link and stvp directly onto battery and flashing 1.3.4 fulldump hex. Then when you cook up the forward enable stealth mode and error reporting level 3.
CDogg
Posts: 62
Joined: Tue Sep 03, 2019 7:08 am

Re: HELP, Max firmware 8.1.8 has an extra security measure built into the battery that affects the ESC and dash.........

Postby CDogg Sat May 07, 2022 8:27 pm

This is something I've been working on for close to a year now. The closest I've gotten to a full battery reset, is hooking up your ST-Link (following the directions for BMS flash found in the other topic. and before trying to read/write from STVP, tab over and check your read out protection ( makes sure its off) then try and write an option byte on every sector. Then do your fulldump.
It's been hit or miss depending on battery but make sure to be very thorough and precise when soldering any leads on those solder pads. They seem to be very flimsy and your copper trace can break very easily, which will prevent you from being successful.
Without doing this step, you'll probably get an error popup that says "cannot detect SWIM" or cannot write due to write protection.
Zopem
Posts: 1
Joined: Sun May 08, 2022 2:02 pm

Re: HELP, Max firmware 8.1.8 has an extra security measure built into the battery that affects the ESC and dash.........

Postby Zopem Sun May 08, 2022 2:21 pm

Hello, I have experienced the same issue you mention about the battery cutting the scooter off when you attempted to ride it, while the scooter was on my work bench and I test the scooter, the motor runs full speed and will continue running, which everything good, however when you attempt to ride it - then it cut off.

I did resolve this issue, I bypassed the BMS board on the battery all together. On the bms board the thick black ground wire that's attached to in the center area of the bms board I removed some of the rubber housing so I could solder another short wire (same thickness as the ground wire) I soldered the other end of the soldered wire to the ground wire found in the corner of the bms. (Note: the ground wires are thick, I was finding it difficult get a good secure solder bond. But eventually I got it.. the scooter runs great.
vicenetefernandez
Posts: 2
Joined: Sun May 15, 2022 4:52 am

Re: HELP, Max firmware 8.1.8 has an extra security measure built into the battery that affects the ESC and dash.........

Postby vicenetefernandez Sun May 15, 2022 4:54 am

u have a picture of what u did, or is there a video
kastrypala
Posts: 2
Joined: Sun Jun 12, 2022 9:44 am

Re: HELP, Max firmware 8.1.8 has an extra security measure built into the battery that affects the ESC and dash.........

Postby kastrypala Sun Jun 12, 2022 9:47 am

hello. is there a solution for this?
kastrypala
Posts: 2
Joined: Sun Jun 12, 2022 9:44 am

Re: HELP, Max firmware 8.1.8 has an extra security measure built into the battery that affects the ESC and dash.........

Postby kastrypala Fri Jun 24, 2022 12:18 pm

Hello, I have experienced the same issue you mention about the battery cutting the scooter off when you attempted to ride it, while the scooter was on my work bench and I test the scooter, the motor runs full speed and will continue running, which everything good, however when you attempt to ride it - then it cut off.

I did resolve this issue, I bypassed the BMS board on the battery all together. On the bms board the thick black ground wire that's attached to in the center area of the bms board I removed some of the rubber housing so I could solder another short wire (same thickness as the ground wire) I soldered the other end of the soldered wire to the ground wire found in the corner of the bms. (Note: the ground wires are thick, I was finding it difficult get a good secure solder bond. But eventually I got it.. the scooter runs great.
hello, could you tell us in detail how you did it or send a photo?

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