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Here's your bible viewtopic.php?t=138

Actually the one you caught on camera has one in the upper left corner
Laters gens have it on the service disconnect.

They are all hall effect, not shunts

It means the UART communication between ESP and STM32 has issues. E.g. bad connection, out of sync baud rate etc.

The latter can be improved by running the latest firmware that you find on github. I'm assuming ESP8266 https://github.com/jsphuebner/esp8266-web-interface

As always a meter in diode mode will tell you. If it displays 0.7V or so you have found reversed polarity. Or just connect your lab supply, see in which direction it shorts out.

Both conversions I worked on have skewed voltage readings with extended tap wires. Although one meter split in the middle has better chances

Ah sorry, your first post looked so generic that I thought it was AI generated. We've got a spambot problem here, they post something remotely meaningful and later add links to casinos or something

Sounds done to me
The noise is +-300 so no point in tuning it further

I like Coo Coo. Fewest cables on the outside, artsy on the inside.
Bulging ain't no topic with modules. How much more structure could you want...

Just thought I should make this public. I will travel to Sweden next week (18th of Jan) where I will spend 3 weeks. In the first week I will be busy, then I'm more free-roaming. Second week (about 26th to Feb 2nd) I will spend in Börtnan and the final week in Östersund. So if a few people come toget...

u1 if off because of the missing FET, but there also seems a broken PFET messing with the other values. When I fixed your modules previously I went over all FETs with a diode test mode. They should read 0.5V or so from Drain to Source. Any more or less means it is broken and needs replacement. It is...

Yes, these two.

When updating firmware via CAN the processor actively pulls low the control gates. But when updating over SWD they are configured as inputs and can float away.

Next version is going to have pull-down resistors on the control gates

Aragorn wrote: ↑Fri Jan 10, 2025 12:00 pm It would be very nice if the VCU could interact with these factory ESP signals and respond appropriately.

Yes that was the plan but I never understood the system to that extend. I should do some CAN logs the next time I get a chance but the snow is already melting

Yes that is another mux failure. Did you have the battery connected while updating via SWD? Maybe some pins randomly toggled while flashing. I think I have to add pull-down resistors to the respective pins. Remove Q1 and Q5 and see what that does. If you then get readings from the other channels rep...

It looks like this sensor: viewtopic.php?p=9183&hilit=036906051G#p9183

Doesn't need any pull-up

It's all CAN based. Wheel speeds come in via CAN and then throtmax/throtmin is modified (via CAN) to throttle regen or acceleration. The code I linked above calculates average axle speed from the two wheels speeds. A certain difference is allowed (in the test 3 kph during acceleration and 2 kph for ...

Tested traction control: viewtopic.php?t=6018

I've found a few more items of the EP2CCU and added them to the DBC file
https://github.com/jsphuebner/MG-EV-Cha ... P2CCU1130A

Ultimately I'm going to have to hook up a proper battery and see if playing back the CAN Logs fires it up

What you see is done by cutting back throttle and yes that is done by the VCU: https://github.com/jsphuebner/stm32-car ... r.cpp#L416

It's only when one side spins faster than the other that ABS applies brakes.

On a pack of this size balancing might take too long. I'd guess there's like 5 Ah between the lowest and the highest cell. And the balancer is only connected to 1 cell at a time per module. So the 100 mA balancing current is effectively just 100/16=6 mA when all cells are balanced. That would be lik...

Finally got the chance to test traction control on snow today. See for yourself

Jacobsmess wrote: ↑Thu Jan 09, 2025 12:49 pm Are all the ULN2003A ICs likely equivalent for this job?

I think yes. It is likely though that you don't even need this, unless you want to control the precharge relay and other things with the inverter

I just checked the code for 4.87.R and it disables PWM when setting manualid/iq to 0. So in this state you shouldn't hear inverter whine and there should be 0 current draw. You can do the tuning with the latest firmware also, only Manual Mode has been made redundant. You just give it the regular sta...

The problem should be easily reproducible if it is cooling related. This time make sure to log tmpm and tmphs. Most likely tmphs will go out of check

Just like riding a tandem (to be honest I never have)