ecu location

[ainarssems]

You can do them via OBD, but only master ECU, then you have to move slave ECU to master port. You will end up with 2 ECUs that want to be masters which then need to be adapted correctly so that one is master and other one slave otherwise it will be running only 4 cylinders. I have not done any myself but I know that people, even professional tuners have run into this issue and some even ended up with bricked ECUs and forked out for 2 new ECUs from dealer.

If I had 4.2TDI I would definitely remap it but I would invest in BDM just in case, it's not all that expensive comparing to the value of car or 2 new ECUs. You can always sell it on later or keep as backup for any future jobs.

[Paul r]

Is there some literature on this somewhere?

dint quite understand. What do the two ecu's do? Would you have to flash them both with bdm or just one? How does the master/slave thing work?

Cheers

Paul.

[PsYcHe]

The two ECUs run in tandem, controlling essentially half the engine each.

I'd say if you're not sure, don't risk it and take it to someone like Shark Performance who know how to map them as you could be looking at a bill of 2k upwards if you trash it.

[Paul r]

I'm never going to learn if I take it to someone else am . :-)

Appardently the fgtec Galletto master v51 will do the job too. Looking at the interface, it has entries with ecu 1 and ecu 2 in the read/write software. It also does bdm.

So how exactly do I get to the two ecu's?

Paul.