jlr DC/DC hacking

[ganch]

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.

[ganch]

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

[Jack Bauer]

I have one on the way.

[Jack Bauer]

Mine arrived. Connectors ordered.

[Jack Bauer]

Pin 5 is CAN H. Powerup log attached.

[ganch]

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?

[ganch]

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)

[Jack Bauer]

Just 12v. Hope to get some ipace logs soon.

[Jack Bauer]

Finally some logs of PMZ can from a LHD ipace. Not tested on the dcdc yet but seems to have the correct ids and wakes an ipace gear selector that is also on PMZ can.

[Jack Bauer]

Its alive

[Jack Bauer]

Seems the DCDC wants to see 0x030 , 0x094 , 0x17A,0x583. All static except 0x17A. It does not need any +12v feeds from the multiway plug. Wakes on can. Does not care about hvil. Does not care about much really.

[Jack Bauer]

iPace DCDC running in the V50. Here is the rough code :

https://github.com/damienmaguire/Stm32- ... ceDCDC.cpp