probable counters and checksums..

ID 194 counter D3 low-nibble increments (0..15)
ID 194 checksum D7 == CRC-8(poly 0x31, init 0x00, xorout 0xFF) over [D1,D2,D4,D5,D6,D8]
ID 54 counter D1 high-nibble increments (0..15)

I will try to make some sense of this..
How exactly was this powered? only on the 12V side? If HVDC was used, what voltage?

Connector.
https://uk.rs-online.com/web/p/automoti ... rs/9097826

Pinout

1 12V Main?
2 12V Ign on?
3, 4 HVIL
5 CANH (NCV7341 PIN 13)
6 CANL (NCV7341 PIN 12)
7,8 0V

Unit is by LG Innotek.
J9D314B227AD is this example. Outward appearance seems identical for I-Pace and LR/RR Hybrids..

Internal Photo..

Anyone started to do anything with this? Input please.

I will start with figuring out the 8-pin connector.