JB-JL ECU Pinout

Carbun · January 16, 2026, 11:19pm

Hi all,

Currently preparing for the jb-jl swap into my l200. I have a pretty good pin out diagram now from the original ef-jl engine loom.

The problem now is that some of these pin outs to the body loom are ECU pins and I haven’t been able to find a jb-jl ECU pinout to put them against. I’m unsure of a safe way to figure out which ECU pin will go where other than trial and error.

Anyone know of a diagram? Will a jb-det one help some? Can @NikMF help as I know it’s been done in Malaysia?

Thanks in advance! Any info is welcome!

Rudiavanzato · January 18, 2026, 12:04pm

Hey there

I own a l512s avanzato r4 jb jl engine

Good engine but being honest the 3 pot engine has more parts available for tuning.

I would head down that road rather than jb jl engine

Very hard to find aftermarket parts for compared to 3 pot engines

Maylasia is the place to source all the good parts being honest they crazy into tuning them things up

Jb jl good for slighty over 100 hp with stock parts if you want more its heavy tuning and hard to find the stuff worldwide and a standalone ecu not to forget

Carbun · January 18, 2026, 12:42pm

Hiya,

Yeah I’m aware, I have an ef-jl engine but it’s royally fucked and with what I do, I decided that ej-de was not the route for me and I managed to get a jb-jl for cheap so that’s the route I went. I have further plans with the JB-jl beyond this but yeah, it’s just getting a few wires figured out is what’s stopping me now. Not chasing immense power but just enough.

NikMF · January 19, 2026, 2:58am

Hey mate,

sorry for the late replying, most of the JBJL swaping engine will doing together with stock JBJL looms for easier connection unless using stand alone management.

King_Jam · January 19, 2026, 4:38am

If you get the chance can you share what you have on EF-JL pinouts? There’s not much info out there. Thanks

Carbun · January 19, 2026, 7:32am

No worries, I’m starting to believe I’ll have to do the same thing so gonna be getting the body loom if possible.

Carbun · January 19, 2026, 7:33am

Yes will do, so far I’ve mostly confirmed what has been previously posted on the forum regarding ef-jl pin out as I did most of the work using this but I’ll share my spreadsheet once done anyways.

NikMF · January 21, 2026, 12:32am

to avoid more headache, better find the looms. haha.

Carbun · January 21, 2026, 8:37am

I’m looking but I’m heavily considering going speeduino and making my own loom, I’ve got most the stuff I need and I can afford the investment.

Carbun · February 1, 2026, 11:22am

With me going speeduino, I’ve torn the JB-JL loom apart and traced all wires for recycling and knowledge. The middle connector on the JB-JL ecu is missing but I’ve created full pin out diagrams for the other two ecu connectors that connect to the engine and have labelled all wire colours too. I’ll share screenshots below but feel free to contact me for more questions or clarifications.

13x2 connector (ECU Outputs)

Green grounding terminal - this doesn’t actually connect to the ecu but sits next to the ecu with a cap that links all the wires together.

6x2 Connector (ECU inputs)