Coming back from an event-free ride, when I plugged in my 2012 Miev in a 220vac charger nothing happened. The dashboard light confirming that it is plugged in did not come on and the car did not charge. I also tried with two 120vac chargers with the same results. (My other Miev charges OK with all those chargers).
The on-board charger has been replaced under warranty last year and I tested another cable from the side connector to the on-board charger: same behavior. The 12 volt battery has been replaced last year. The car runs correctly as I was able to drive to the dealer with only two bars remaining.
With Canion, I was able to connect and read the voltages of the battery cells (only 2 out of 16 bars left, high=3.765V, low 3.735V, avg 3.750V, 330V, SoC% 22.0, the main battery is approximately 70000km, the car is 172000km).
The dealer has tested the on-board charger and followed the testing procedures and found nothing wrong anywhere. There were not fault codes. I asked them to clean the ECU and BMU connectors and check the on-board charger and EV control relays: everything looks ok. They asked for remote support from Mitsubishi tech support in Canada and did a remote troubleshooting session with them. Their conclusion is that it is "probably" the BMU but they will not commit themselves to anything. They say a replacement BMU (CAD1200$+labour+taxes) has to be VIN programmed to be installed in my car; if this does not work, I might be wasting money for nothing.
By coincidence, the dealer has another 2012 with the exact same problem. He has been searching for a month and also concluded that the BMU must be replaced to continue the troubleshooting. Without being 100% sure the BMU is bad.
It simply looks like the car never detects the ac is plugged in.
-Does anyone have any hints whether the BMU replacement would resolve this issue?
-If it does not, what are the other possible culprits? If they don't need to be VIN programmed, I could try to swap them from another Miev... But if they all are very expensive, I will probably just abandon the car (A working 2012 Miev with 60000km sells for CAD6000$ these days...).
-Can the identification chip be moved from my possibly defective BMU to another BMU previously used in another 2012 Miev?
-What else could I ask the dealer to check?
Thanks for any help!