Gencis wrote:Today I bought new battery in my I-miev.
Battery voltage 13,16V.
When turned on, batt. voltage was 12,48V
What about when ready?
Now what should I check next?
Check that you have a 12V battery charger handy, so you don't ruin the new auxiliary battery
The high no-load voltage is possibly only due to the low temperature; the low voltage under modest load suggests to me that it needs charging.
But have you checked the fuse in the MCU, behind the cover? It sounds like your DC-DC is not working. If it's blown, you should open the on-board charrger to check for blown capacitors.
Edit: but if your problem is still intermittent, then problems with the on-board charrger, and even the MCU fuse, seem less likely. I'm now suspecting contactors, or possibly ground leakage, preventing the high voltage system from connecting to the rest of the vehicle. Can you use a CAN bus (OBD2) spy program to read the traction battery voltage?