Thread: ECU programming/marrying

Probably initially best to contact Cambo, a member here. He lives in Sydney and is a guru on most things JLR electronic, and I can speak from personal interact that he knows his stuff. Good luck

Originally Posted by Alf002

Have spent a fair few hours digging through the web trying to find exactly what I would need to marry ECUs, with all the key calculators?

I think it's important to clarify precisely what you mean by "marry" in this context. If it's a case of programming an "identical" second hand ECU to match the car then potentially. If it's trying to do something that didn't come out of the factory then it's a bit more complex.

Originally Posted by BradC

I think it's important to clarify precisely what you mean by "marry" in this context. If it's a case of programming an "identical" second hand ECU to match the car then potentially. If it's trying to do something that didn't come out of the factory then it's a bit more complex.

Yes, I would want to program an identical ECU to match. I have done some more digging and believe a Launch X431 Pad V Elite can do what I want, for my budget, without a VIN lock or similar restrictions (if anyone believes I am mistaken, please let me know).

That said, if I were to use a non-identical item (again, how "identical" do the ECUs need to be?), would the SDD/Topix software be the only option?

When it comes to 6HP or 8HP TCMs in Land Rovers, they only need the correct software loaded to match the vehicle spec.

So if you have a 2010 3.0 D4, and you swap a used transmission from a 2010-2012 3.0 D4, it’ll just work.

If it came out of a Range Rover Sport, then it’ll need programming.

The VIN in the module doesn’t matter, and anyway the VIN can’t be changed with regular tools.

The transmission software variant is based on the model and engine type, and power output.

Example the later 8HP in the Aussie 3.0 D4’s, that is 2013MY 520Nm or 600Nm, and 2014-2016MY 520Nm or 600Nm, so four different versions.