NefMoto

Here is my dilemma... My car was Stolen...

I have a 2001 A6 2.7t which I switched the ECU to the one from an S4 (Wanted to code out SAI and EGT, post CO2). as the definition files are readily available for that box.  Is there a file out there that has the benefits of extra HP as in S4 but keeps the IMMO?
bought a new cluster from a 2003 so I went through all the hoops to have the immo light off (coded the immo chip inside the A6 ECU to match the cluster data, IMMO light goes off after initial check, but car starts if I pull the ID cylinder from key... :S (immo light flashes and goes on).

2nd thing I noticed that the Traction Control and ABS lights come on after WOT, anyone have ideas what the issue could be? (got a MAF sensor code - replaced MAF, problem persisted) no other codes posted on Vag-Com I think it has something to do with the engine load data not being passed onto the ABS/TC computers...

You likely have a boost leak, or failed to raise the threshold for maf diagnosis if tuned. As for a file, use any of them you want. None are as well defined as the S4, but comparing the two should make it simpler :)

yes, post specific codes you're getting.

One of the euro s4 maps should do the trick, as they should have immo, but they are not as well defined as the Mbox.

Yeah that's the issue I ran into :S  I just could edit my A6 ECU and code out those items but I tried and failed... anyone have a base Euro file for the 2.7t I could play with? or a stage 1 tune that has the egt, post cat and sai coded out? :S

On the s4 wiki there is a list of the different ecu codes, in the original ecu file section on here there is a sticky by nye with a link to many different 2.7t original files.

Does your a6 have the sai/lambda2/egt deleted? I thought they should be present on a 2001?

And what's the story with the stolen a6? I take it you recovered it?

Yeah it does have it but I coded it out in the S4 file...

They broke door and started the car with a screwdriver, recovered 4 days later 5 blocks away...  Still at insurance company..

Need to fix up the IMMO, although will be installing a GPS tracker with fuel cut... and a baseball bat in the trunk of other car ;)

Hmm, anyone know which ECU number a Euro S4 would be? 01 A6 2.7t Auto is where it will be used

Flash a S4 551L and see if it works. You won't have IMMO but it's a start.

551D is a bosch manual ecu. 1024kb.

Can 551D be coded as auto?

Ah so confusing.. so my Original ecu is 4B0 907 551 Q, switched it to 4B0 907 551 L box with modified BIN, but I take it it's a US S4... Looked at the tables, but cant see an equivalent ECU that matches my Engine code (APB). what file can I use? 01 A6 Auto 2.7t APB   Is there a BIN that equals my 551 L but with added immo?

4B0907551T is 2001 APB tiptronic, with immobilizer.

excellent...  ;D

now how comparable is that file? (the definition with address locations to the L box..) wondering if the tutorial I used previously for L box will work on this, don't have my car to pull my bin from the ECU (Insurance company still has it, can't find my backed up file :S )

Sorry to be such a pain you guys! Hopefully I can return the favor someday once I get smart with all of this..  LOL

One more question... Do I need to get the T ecu in this case or can I load the BIN onto the A6 (551 Q) ecu...  because from what I have learned, correct me if im wrong but does the L Box have an IMMO IC?
I downloaded the EEPROM from my ECU to code a dash I got from a 2003... (was a successful swap, IMMO light is off)


4B0907551T how comparable is that to the Q box I currently have? PITA to figure out the Q box, have up on that as the DEF files weren't very good.

Wanted the extra horses offered in stock S4 vs the A6 plus I figured out the S4 Lbox in coding stuff out, but lost the IMMO :S     so im after pretty much what the S4 stock has plus an IMMO back..

I havent looked, but in general the locations are not comparable between different ECUs (L/M-box being the obvious exception). This means that an XDF for L/M will not be valid with T - you will need to find the maps yourself, but this wont be super hard, especially if you only need 4 maps or so. Take a look at the threads talking about how to find maps, or generate XDFs.

You should be able to load the T bin straight onto the Q ecu and have working immo - remember that once you have an active immo, you will need your ecu paired to your cluster, and your keys paired to your cluster or the car wont start, plus if the keys have previously been paired to a different cluster, you will need new transponder chips for the key ($10 for two on ebay).

This sounds complicated, but its totally possible, I've done something similar on a 1.8t.


DD/Nyet - is there a tool to generate a definition for an ecu, given a defined ecu? The beyond compare/hex editor stuff should be automateable fairly easy.






DD - is there a tool to take a known map/definition pair and produce a definition for a similar map? It would be quite nice to have a S4 ecu with immo as well defined as the m-box.

 

This is correct, to an extent.

Year to year, auto to manual are usually perfect geographical matches.

Year    Manual   Auto

2000    551A--->551B
2001    551M--->551L
2002    551T--->551AA

Yes, it would be very easy to do this... just never got around to doing it. Even if the map had to be 100% the same for it to be recognized, it would result in a pretty exhaustive list.

Scalars (or smaller tables) would require a bit more finesse. And similar but not identical maps the same..

Wondering if I should try messing around with my Q box again that came with the car, That one had a working immobilizer BUT Post CO2 and EGT codes were popping up tossing the Check Engine Light...
From what I remembered, the Q ECU values to disable SAI and EGT were one bit off from the L box...  Would be nice to figure this out, but keep on getting stumped... Maybe I should just pay someone to show me what to do, or edit the file and then I can compare with a HEX editor.. :S

After some digging I came across that 8d0907551l is compatible on the Q box, and that the M DeF file works on it? this might be a route to try if that's the case

L box doesn't have immobiliser. I'm sure someone here would help you out with defining bits of a box, I for one would quite like an immo on my car again! Next time I get some spare time I'll take a look at auto generating one, nyet makes some interesting points.

Nyet:
I think you have a mistake in your ECU part numbers text I was looking at today :S
"4B0907551Q  01 026120    -1037-               6mt NA  A6 APB"
I believe it should say TIP not 6mt...  my stock ECU is a Q and it's a TIP car. :)

Hmm. It could also be a file that can be coded for tip or 6sp... thanks for the heads up.

Could someone help me with creating a definition file for this ECU? gave it a shot with several different ones and the addresses are all over the place :S  nothing jives...

Now i'm really confused, thought 551AA was manual and 551AL is TIP?

Can't find a proper XDF for the A6 Bin, yet another attempt trying to manually compare the BINs in a HEX editor to cross reference the values got me stumped trying to find the EGT temps and one address to edit out from 4 O2s to 2 O2s.  The M def file is fairly close to my Q or the AL, manually offset the addresses but couple values look like the m box in the Q file... :S

Not sure if I should start from scratch again.. :S

so end goal is Immobilizer working in my A6 TIP with O2 and EGT coded out.  Anyone ever sucesfully do that on a A6?
Can I run the RS6 bin on this car? APB engine... read couple things about the euro A6 having the stuff already edited out. any thoughts?

Loaded up my original bin but I am not sure if I buggered up my backup (car has starts to stumble around 3000 RPM, no codes thrown...)
Is there a 4B0 907 551 Q stock bin kicking around?

I have also been messing around with my L box ecu and copied over the 95040 from my Q box, then loaded my Q bin onto the L box. VCDS started communicating on the bench and get IMMO code and can do adaptations.  Just curious if you can actually turn a L box to a immo box and run the proper bin with immo? One of the nice things to pass on is I got fed up with shorting the GND pin on the ecu, and soldered in a pushbutton into the case, now its super easy for bootmode. Curious to see what you guys have done to quicken your process?

I manually compared several files via a HEX editor and tried to update my XDF.  I found that the AL file has closer matches than my Q bin. (not sure if AL has immo or not, will try stock bin next day or so)
looking for help locating the addresses for an O2 Delete and EGT Delete..
Been plugging away on this for several weeks but seems like I can't get a match for couple of the addresses. Would someone be willing to look at the def file and help me out? got about %75 figured out but hitting a brick wall finding pattern differences to locate couple of the variables from the S4 tuning Wiki :S Help with couple bread crumbs!! :)

Also does anyone know the value for CWDLSAHK - 0x18663 ? My default value is 50 dec.  (if anyone knows the stock HEX values around that area?)
also attached a preliminary Q def file I have just wrapped up.