coulomb
Posts: 297
Joined: Sun Jun 10, 2018 8:32 pm
Location: Brisbane, Australia

Re: not charging my iON, cell or CMU or BMU problems

Sat May 23, 2020 10:44 pm

martinwinlow wrote:I appear today to have confirmed that the MUT3 can renumber CMU BMS PCBs

I actually thought that they would renumber themselves, using a daisy chained pair of wires between each CMU.

Are you sure you needed the MUT3 for this? Perhaps the MUT3 is needed to "kick things off", and the CMUs then renumber themselves based on their position in the daisy chain.

DBMandrake
Posts: 298
Joined: Mon Mar 20, 2017 4:57 am
Location: Scotland

Re: not charging my iON, cell or CMU or BMU problems

Sun May 24, 2020 12:59 am

coulomb wrote:
martinwinlow wrote:I appear today to have confirmed that the MUT3 can renumber CMU BMS PCBs

I actually thought that they would renumber themselves, using a daisy chained pair of wires between each CMU.

Are you sure you needed the MUT3 for this? Perhaps the MUT3 is needed to "kick things off", and the CMUs then renumber themselves based on their position in the daisy chain.

That's apparently exactly how it works, however the diagnostic tool is required to "kick it off" and cause the self renumbering to take place, as prior to doing that it was setting a fault code for the CMU and the battery gauge was empty. (Due to no cell voltages from a block of cells)
- Simon

EV: 2011 Peugeot Ion
ICE: 1997 Citroen Xantia V6

martinwinlow
Posts: 68
Joined: Sat Sep 01, 2012 3:02 am

Re: not charging my iON, cell or CMU or BMU problems

Tue May 26, 2020 12:15 am

No 'kicking off'; there's a specific MUT3 app routine to do it (detailed on the SPeakEV thread, https://www.speakev.com/threads/i-miev-with-failing-battery-another-cmu-ltc-chip-failure.144620/page-3#post-2829628).

Unfortunately, it does not appear to have helped 100% in my case as it appears the version of CMU PCB that I got is not entirely compatible with my very early i-MiEV (last 5 of the VIN is 00136 and V5 shows first registered 20Nov2009).

However, the car goes to 'Ready' and the wheels go around and around, albeit it is still on the car lift. It charges, too (from AC), but I have not had a chance to see if it is at the full 13A, let alone via DC (no facilities to do that here on the island anyway).

So, my next plan is to try to obtain a pair of the same version of CMU PCBs and try them in the car.

Anyone know where I could try?

kiev
Posts: 1611
Joined: Sun May 03, 2015 7:15 am
Location: The Heart o' Dixie
Contact: Website

Re: not charging my iON, cell or CMU or BMU problems

Thu May 28, 2020 10:14 am

It wasn't clear to me that there was a defective LTC chip, maybe so, but there were 2 very low cells, #38 and #42.

So after swapping out a CMU05 board, the low cell #38 is not reading low anymore? Was the cell voltage actually measured with a voltmeter to verify it's actual reading before and after the CMU?

As long as the pack is open, maybe some other tests might be to put the old CMU back in to see if the problem returns. And move cell #38 to another location. Change some things around and see what the tools show, etc.

i would definitely want to put a meter on CMU06 cells (cell #42) to get measurements.
kiev = kenny's innovative electric vehicle

DBMandrake
Posts: 298
Joined: Mon Mar 20, 2017 4:57 am
Location: Scotland

Re: not charging my iON, cell or CMU or BMU problems

Mon Jun 29, 2020 12:36 pm

Martin has probably forgotten to post back here but on SpeakEV he has reported the problem as solved.

There was an interesting wrinkle to the issue though - his car is so old that it has pre-production or very very early production CMU boards which are coloured Red instead of the normal Green and have an early revision number than nobody has ever seen before, and also a partially incompatible firmware!!

When he tried to fit a regular green coloured second hand replacement CMU, the re-numbering process worked, however there were other fault codes still set due to (we believe) incompatible firmware versions between CMU and BMU.

So in the end he had to have a new LTC chip fitted to the original red board, this has fixed his problem and the car is back on the road charging and driving without fault codes.
- Simon

EV: 2011 Peugeot Ion
ICE: 1997 Citroen Xantia V6

Sandrosan
Posts: 39
Joined: Tue Sep 24, 2019 2:43 am
Location: Milan, Italy

Re: not charging my iON, cell or CMU or BMU problems

Tue Jun 30, 2020 10:35 am

Thanks Simon! Very good to know he has solved with a new LTC chip.

DBMandrake
Posts: 298
Joined: Mon Mar 20, 2017 4:57 am
Location: Scotland

Re: not charging my iON, cell or CMU or BMU problems

Tue Jun 30, 2020 12:08 pm

Sandrosan wrote:Thanks Simon! Very good to know he has solved with a new LTC chip.

As long as it's done very carefully by someone with the right solder rework equipment and skills, it does seem that the LTC chip replacement is the most likely repair method to be successful, (side stepping all possible numbering and firmware issues) and the good news is the chip itself is still available to buy new at a very reasonable price, even if second hand CMU boards weren't available.
- Simon

EV: 2011 Peugeot Ion
ICE: 1997 Citroen Xantia V6

Afigeinnai
Posts: 8
Joined: Mon Oct 19, 2020 5:44 am

Re: not charging my iON, cell or CMU or BMU problems

Tue Oct 20, 2020 1:13 pm

Greetings from Norway.
I have same problems with my BMU controller in Peugeot iOn. i have tried to resolder all possible points and it helped little bit. Before there was no connection with unit at all. Now its implausible : it can stay for some time and will fail after few minutes.
Where start to dig ?

I made some short video : https://www.youtube.com/watch?v=e28lBri ... e=youtu.be
Last edited by Afigeinnai on Thu Oct 22, 2020 8:09 am, edited 1 time in total.

kiev
Posts: 1611
Joined: Sun May 03, 2015 7:15 am
Location: The Heart o' Dixie
Contact: Website

Re: not charging my iON, cell or CMU or BMU problems

Tue Oct 20, 2020 5:49 pm

Howdy Afi-g,

What mode is the car in when you were doing this video, e.g READY, ON, ACC, charging, OFF, etc.?

And you said that you touched up some solder junctions, but did you replace the LTC chip or any other chips?

If you desire to find the fault:
Do you have a hot air blower and/or some cold air in a spray can? You could try to induce or clear a fault by heating up sections of the CMU board around the LTC chip and the microcontroller, and also using cold-spray to cool off individual chips to see if the fault can be induced or cleared. This might reveal an intermittent solder connection, ceramic capacitor, resistor, etc.

To get the car back on the road:
It may be that you need to find a used CMU board and just swap it out rather than troubleshoot down to the chip level.

Simon or coulomb may know how to trigger a CMU renumbering without doing an eeprom swap.
kiev = kenny's innovative electric vehicle

Afigeinnai
Posts: 8
Joined: Mon Oct 19, 2020 5:44 am

Re: not charging my iON, cell or CMU or BMU problems

Wed Oct 21, 2020 11:00 pm

Hi.
Will tell story from the beginning.
I bought this car with ``not charging`` problem. Fast charging was working, bet when you connect it to 10A charger, charger indicator turns on, fan starts, even cooling pump activates, but after few seconds everything stops and charge indicator on charging cable goes off. The yellow light in dash indicates fault. By the way, the car was running I took it home without any problem.
Since I do not have good diagnostic equipment , i use iCarsoft. Ther is no iOn or C-Zero so I use Mitsubishi iMiev as car definition. The following failures came :
Cell Voltage sensor BMU ( P1A33)
Remote CAN T/O/ Not equip ( U1113)
Charger state signal error BMU (P1A39)
As well i use OBDLink MX and app OBD Zero to see whats going on cells itself.
Row nr 7 in batt pack showed 329 V. Thats why i took down battery for closer check. What i found out that if you press gently with finger on processor in PCB for CMU ( this one which is located direct on battery) and you will disconnect and connect CMU again ( still with finger on processor or somewhere near by) the row nr 7 starts to answer and good values appear on screen. faults P1A33 and P1A39 disappears...
Fail U1113 is always active, but i believe, its caused that i use iMiev diagnostic soft for Peugeot. Might be i am not right.
I managed to get few CMU PCB, but they are in terrible condition - from flooded car...
I found one CMU with minimal water damage, cleaned it and replaced. Unfortunately it was with address for nr 3. So when two CMU boards with the same address was connected OBDLink showed failure for nr3. To check this CMU functionality I disconnected pack nr 3 . I was happy surprised that flooded CMU with nr3 was working like it shoud. CMU was replying and good values was showed on OBDLink MX. I put finger on temperature sensors, and they reacted: values changed on OBDZero app.
Thats why I decided to swap eprom from fault CMU with nr 7 to flooded with adress 3.
Now came the unexpended failure. After changing address CMU was recognized, but look like system freezes: all values for all batteries became the same. Its in attached picture .No green cells with highest voltage... I tried connect\disconnect this CMU for several times. It does not helpt. I cheked the car condition with OBD. More failures came to diagnostic( 6 or 7like temperature sensor, low voltage, mismatch and other) .
Then i took eprom back to defected CMU PCB. Result now is the same as before swap . With finger on ( actually i have a small plastic spade on side of PCM to make it banded little bit ) the failures gone ( except U1113 MiEV can T/o/ not equip).

All checks was done only with ignition on. I can`t turn ignition key to ready position, because the power cables is not attached to motor controller, as well pack nr 7 is not connected to the rest of the system.

Picture of freezed system with changed eprom should be there :

Image

With banded PCB ( finger on processor) :

Image

Failure on PCB :

Image
Last edited by Afigeinnai on Thu Oct 22, 2020 1:00 am, edited 1 time in total.

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