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Another data point, not sure if that was before or after the Ah erase (probably before) : Odo 87856 SoC 15,5 Lowest 3,655 Highest 3,730 Spread 0,075 Definitely before I touched anything with diagbox : Odo 61164 SoC 10,5 Lowest 3,435 Highest 3,605 Spread 0,170

Hi I have Diagbox v7.1 only and the calibration menu for my C-zero is clearly different from yours My calibration only has 2 steps: Step one, start with more than 1 bar, turn The heater on, switch the car off, plug the charger in. Charge does’t start yet. If draws power until it automatically...

Hi, I also believe we don't quite understand how the car estimates and/or updated the SOH of the battery. When you cleared the Ah value which initially went back to 45+ Ah, then hit a very low actual SOH indicated by cells voltage, I don't quite understand why the car did not instantly update...

About that, what is the exact purpose of this battery age value in the BMU ? Some have noticed that they could reach 0% of SoC while the lowest cell voltage is still relatively high (3.2V for instance). Thus, not really using the whole battery capacity that they have available. They suggest...

Well, I have proceeded with the CMU10 board swap, and it worked flawlessly :D I swapped a CMU10 board with another CMU10 board from eBay. Nothing visibly wrong with the old board, no matter how close I look, could be the analog-digital converter as pointed out in this thread... Car is good...

Found the torque values ! http://mmc-manuals.ru/manuals/i-miev/online/Service_Manual/2012/index_M1.htm I have stands and a jack that goes beyond 50cm in height. I am actually chewing with the idea of removing the wheels before I drop the battery onto the rolling boards, in order to keep the...

Hi Gary, Superb info, thanks! I have given some thoughts on how to remove the pack (with what I have at hands) and came up with the following sequence : - put the battery in safe condition, remove 12v battery - put the car on jack stands, remove the bottom plates, check for 0V, remove all the...

Hi Gary, There are 3 connectors between the car and the battery back (besides obviously the high voltage connection). Two at the front end and one at the back. Are you saying only one is needed to switch the car on (without "ready") and read values with Canion ? In that case, which one is it ...

Hi! I am most likely going to proceed with a CMU board replacement. I have noted GREAT information here, thanks. I have not found any indication regarding the bolts torque one should apply, does anyone has some indication regarding those ?

Hi, Thanks for the great info. I already ordered the CMU board from a reputable eBay seller, so I am not concerned about the board being another ID than 10, as he confirmed that. Rather I am a bit concerned that the board is not recognized because if was pulled from another VIN number... I...

Hi Gary Good info, quite reassuring that the issue really seem to be confined within the CMU board. I use DIAGBOX to say that it is CMU number 10 that is failing. On Canion, I see voltage issues on cells number 71 72 73 74. I do not know, as of now, where is this board physically located. Any...

Hi! Super interesting info, would be cool to tinker with this. But I have found a CMU 10 board set (board, wiring and space board) of eBay though so apparently I won’t need this auto numbering function. Have you any info about the CMU board being VIN programmed ?

BTW the errors codes I pulled : BMU : P1A7F and P1A4B EV ECU : P1A39 P1A33 P1A2F U1113 I also has some CAN bus error codes (lack of communication or communication errors) but the repair guy said we should not worry too much about them, as a weak 12V battery can make them pop up. Those I...

Hi ! My issue that started only in cold weather is now permanent. Heating the battery and erasing all error codes with Diagbox (PSA tool) I could restart the car, but the voltage readings on CMU_10 are still jumping all over the place on 3-4 cells of the module. Not bad enough to completely...

BTW I can't help but notice I seemingly have an issue with CMU10, the same as the one the OP has an issue with... coincidence or ?

Hi ! I forgot to mention that in order to rule out a bad 12V battery, I have hooked up a new 12V battery in parallel to the original one. Resting voltage was nearly 13V as it is brand new and well charged. That didn't make any difference (I sure wish it did!) I'm going to need to check how to...

Update again. So after my last message in march 2018 the problem simply disappeared and I did not get a single glitch in months. Until temperature dropped again around 5°C a few weeks back. With Canion this time I noticed more than one cell was acting up. Dropping from around 4+ volts down to...

Update, Again the issue appeared after a sub-zero °C night and a full battery. Did not have the chance to test a cold night and a partially discharged battery. Thus I can't determine if the temperature is the sole factor or if it is a combination of the cold AND a full SOC that creates the...

Did you watch the video carefully ? happens at 00:04, 00:10 and 00:22 : cell #77 voltage drops just for an instant. Definetely unusual and not normal at all. It is like for an instant, the reported voltage of one cell (and always that one 77) is completely off by some large amount. In the...

Hi, My issue has repeated during several days and I noticed this : - in the morning, my home > work trip was using as much as 10 bars of the battery gauge, which was grossly too much considering the distance. Car was cold and battery was full at the start. - on the evening, my return trip would...