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-   -   ecu location (https://forum.a8parts.co.uk/showthread.php?t=6363)

Paul r 25th April 2013 05:28 PM

ecu location
 
Hi,

Where is the engine ecu located on the 4.2 tdi?

Cheers,

Paul.

PsYcHe 25th April 2013 08:03 PM

There are two of them :)

But not quite sure where they live.. is there not a box in the scuttle tray in front of the windscreen?

Architex_mA8tey 25th April 2013 11:35 PM

2 Attachment(s)
ECU is item 1 on the following "Chart of Control Units"! :eek:

http://forum.a8parts.co.uk/attachmen...1&d=1366932821

The housing for it looks like this - control unit is item 20

http://forum.a8parts.co.uk/attachmen...1&d=1366932821

+++

Paul r 26th April 2013 12:01 PM

Looks like a pain to get to??

Can anyone confirm if if the ecu is an edc16?

Cheers,

Paul.

Architex_mA8tey 26th April 2013 03:12 PM

there seem to be many listed so would need to refer to your engine code then chassis number to determine which ecu

ainarssems 26th April 2013 03:25 PM

I suppose it depends on the year, early ones are EDC 16CP34, later ones might be EDC17

PsYcHe 26th April 2013 03:57 PM

And there's 2 for the 4.2TDi.. Is this for a remap perchance?

Paul r 27th April 2013 06:55 PM

Quote:

Originally Posted by PsYcHe (Post 56680)
And there's 2 for the 4.2TDi.. Is this for a remap perchance?

It's for a remap, yes. I need to make sure that the flash tool I'm buying is compatable with the ecu.

Paul

ainarssems 27th April 2013 07:38 PM

Best done with BDM

Paul r 28th April 2013 04:08 AM

Quote:

Originally Posted by ainarssems (Post 56710)
Best done with BDM

Why, appart from you can back up the entire ecu? Most places do it through the obd port.

Paul.

ainarssems 28th April 2013 09:50 AM

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 29th April 2013 07:45 AM

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 29th April 2013 10:14 AM

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 29th April 2013 02:06 PM

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.


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