[bigpie]

Thanks for your link thats been really helpful. I am in the early stages of working it at the moment. I do know that the current can be measured from Can Id 0xbb. It is sent 100 times a second and bytes 1 & 2 have the current . It measures + or - and upto about + - 200 Amps . Value seems to be Amps × 160

I will post more when/if I can control the contactors via CAN. I think it should ( from looking at the circuit ) be able to read the overall voltages on contactors and precharge and maybe even resistances to chassis

Did you get anywhere with the contactor control?

I've figured out some of the wiring info for the main battery control board, I've added to

VW Hybrid Battery Packs - openinverter.org wiki

openinverter.org

 

[bigpie]

Got a second pack now to play with.
This is the external connector pin out as far as I've worked out.
I've been replaying some can logs at it taken during charging but haven't been able to get it to close the contactors so far. My main aim is to find the balance command if I can.

EDIT
I've managed to get the pack to close the contactors from the external can interface, the Hybrid Can (pins 13 & 14) IDS 0x09C & 0x3A6, if either stop the contactors open.