Another wont go to ready MIEV

[davidhayesnz]

I'm new to this group. Thanks so much for all the great information I have found already.

I have two MIEVs
Car A. This had a few problems including the air conditioner didn't work, air bag issues and some more. However it had a good 10.5KW battery, charged and drove just fine.
I then purchased another;
Car B with a 16Kw battery that had problems charging including it stopped charging when showing at about 60% charged and it wouldn't charge from a granny charger but it would sometimes charge with a 16amp slow charger. The battery status on the dash would also go blank at random times and then the car would not drive though it would recover from this after a variable amount of time. Otherwise the car was in in very good condition. It alos wouldnt consistently charge on a fast charger . It would keep stopping and would go about about 60% as shown on the dash.

So ....

I swapped the 10.5 Kw battery and BMU into Car B from Car A. Perhaps I was lucky doing this but Car B now with the 10.5KW battery has no issues at all so I have ended up with one very good car.

I then tried putting the 16Kw battery and BMU into Car A but it has the following issues.

Battery wont charge at all
ODB readings show all cells at either 4.01 or 4 volts. I think that means the battery is actually fully charged right? even though its showing at about 60% charged on the dash
Car wont go to ready but with turn on and has the fault light on. The lead battery will then slowly drain as the only power being supplied in the car. For a while after the 16Kw traction battery was installed the car would go to ready for about a second and then go back to not ready. That no longer happens. It just doesn't go to ready at all.

My thoughts
Good readings on all cells suggests the battery cells are OK?
At least one problem must be in the battery pack cells or the CMUs or the BMU (from under the back seat) from Car B as these were the only things swapped between cars.
So excluding the possibility of new issues the onboard charger and motor controller wiring and lead battery should be fine. - They were all working fine before the good battery was swapped out of Car A to Car B. I have tried another good small battery with no change in the problems

I have removed the traction battery and all battery packs measure at about 32volts. So this matches with ODB reading of 4 or 4.01 volts for each battery cells

Thoughts on this please. Should I try getting a replacement BMU and see what that does or is it also very possible that some of the CMUs are the problem. How might I narrow down where the problem is? Otherwise I may just keep the car for parts and breakdown the battery for use in other applications but curious to see if I can resolve this.

Many thanks for any ideas

 

[hjdlsnbc]

You have written much but not named a single error code.
The car itself would tell you why its not going into ready mode. Its telling a error code. Most error codes are known to most people here and then its known what most likely have to be done to fix the problem.
You are telling few times that you are doing something with OBD. But not what software and what hardware you use to do that.
This tool here is capable to run with about any adapter you could be using to read out the voltage of your battery: https://myimiev.com/threads/evutil-a-new-tool-supporting-the-imiev.5712/
Please create a screenshot of the DTC tab from this tool and post the screenshot (only the screenshot of the DTC with some explaining what is the model year of car, battery and so on) here: https://myimiev.com/threads/need-your-screenshots-from-evutil-dtc-tab.5713/
Then continue the discussion in this topic here you started.

BTW: The 10,5kWh battery, is this the one rare one only sold in japan that had always just 10,5kWh but is capable of about 10000 charging cycles without loosing that much capacity?

 

[kiev]

We would need to see the DTC codes thrown by the car to help with diagnostics, troubleshooting and repair.

Use one of the miev phone apps and a good OBDII dongle, or a good OBD scantool, or get a dealership service dept with MUT tool to read out the codes.

Also need to know what are the models, years, mileage of A and B?

 

[davidhayesnz]

You have written much but not named a single error code.
The car itself would tell you why its not going into ready mode. Its telling a error code. Most error codes are known to most people here and then its known what most likely have to be done to fix the problem.
You are telling few times that you are doing something with OBD. But not what software and what hardware you use to do that.
This tool here is capable to run with about any adapter you could be using to read out the voltage of your battery: https://myimiev.com/threads/evutil-a-new-tool-supporting-the-imiev.5712/
Please create a screenshot of the DTC tab from this tool and post the screenshot (only the screenshot of the DTC with some explaining what is the model year of car, battery and so on) here: https://myimiev.com/threads/need-your-screenshots-from-evutil-dtc-tab.5713/
Then continue the discussion in this topic here you started.

BTW: The 10,5kWh battery, is this the one rare one only sold in japan that had always just 10,5kWh but is capable of about 10000 charging cycles without loosing that much capacity?

yes it is the one sold in Japan. I'm having difficulty getting a descent code read on the car so getting a better dongle and trying other software. Will come back when I have something thanks

 

[hjdlsnbc]

Get OpenPort 2.0 adapter. If money is not a problem, then get the original adapter. If you have to save every possible penny, people reported that also clones of the OpenPort 2.0 work.

What issues did you have with your current adapter in combination with the EvUtil? Did you see there the battery cell values but not the DTC codes? Could you report your findings in the EvUtil topic https://myimiev.com/threads/evutil-a-new-tool-supporting-the-imiev.5712/ ?

Thanks for the final report. There was already a report here in the forum, that swapping a 88cell LEV50 pack for a 80Cell LEV50N pack just worked fine without any issues. Now you also report that the rare 10,5kWh pack that never dies could also be put in other cars without issues. Now its known that every battery pack can be put in every other car.