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jlr DC/DC hacking
Posted: Mon Sep 15, 2025 9:27 pm
by 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.
Re: jlr DC/DC hacking
Posted: Tue Sep 16, 2025 9:29 pm
by 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
Re: jlr DC/DC hacking
Posted: Tue Oct 07, 2025 12:13 pm
by Jack Bauer
I have one on the way.
Re: jlr DC/DC hacking
Posted: Thu Oct 09, 2025 12:45 pm
by Jack Bauer
Mine arrived. Connectors ordered.
Re: jlr DC/DC hacking
Posted: Thu Oct 09, 2025 1:30 pm
by Jack Bauer
Pin 5 is CAN H. Powerup log attached.
Re: jlr DC/DC hacking
Posted: Mon Oct 13, 2025 6:08 pm
by 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?
Re: jlr DC/DC hacking
Posted: Mon Oct 13, 2025 7:31 pm
by 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)
Re: jlr DC/DC hacking
Posted: Tue Oct 14, 2025 5:10 pm
by Jack Bauer
Just 12v. Hope to get some ipace logs soon.
Re: jlr DC/DC hacking
Posted: Fri Oct 31, 2025 7:52 am
by 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.
Re: jlr DC/DC hacking
Posted: Fri Oct 31, 2025 1:03 pm
by Jack Bauer
Its alive
Re: jlr DC/DC hacking
Posted: Fri Oct 31, 2025 2:46 pm
by 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.
Re: jlr DC/DC hacking
Posted: Sat Nov 15, 2025 9:31 am
by Jack Bauer
iPace DCDC running in the V50. Here is the rough code :
https://github.com/damienmaguire/Stm32- ... ceDCDC.cpp