RomRaider

bytes from offset 8 are WORDS POINTERS to various ECU parameters stored when error occurs.
bytes from offset 2 are WORDS but each BYTE used as some flag.
for example, Air Flow Meter (HFM):


so at this moment:
8 = DTC code
12h = bitmask flags. mask 00001111 used to skip some DTC to XXX translations,
0101h = couple of BYTE flag if some error condition OR
0101h = couple of BYTE flag if some error condition OR
0101h = couple of BYTE flag if some error condition
FC3Ch = address of N_32 variable
E8D0h = address of TPS variable
E903h = address of XXX variable
E9F6h = address of MAF_BAS/4 variable

is there only four parameters saved when error occurs?

Good work Alec!

You think that's the 'freeze frame' data? I thought OBD2 'freeze frame' data has more variables than just 4?
http://community.cartalk.com/discussion ... rpretation

Got this DTC when I converted my stock MS41.0 to MS 41.2 with the same control bytes (apart from byte 6 and ews delete bit). Didn't found here on list nothing like that. Is solenoid valve the same EVAP?

Silencing it by disabling "DTC 50 EVAP control valve" helped to get rid of it.

With all control bits similar apart from byte 6 and ews delete bit on MS41.0 I didn't had DTC 20 "CHECK ENGINE" Light Failure (checked errors on INPA) and on MS41.2 I did had it on the same car (EU Z3).

Why there is no DTC section on RR for MS41.0 like for MS41.2? It doesn't exist or it is just not yet discovered and added to definition?

That part is attached to the fpr on most American cars. You deleted the code properly. Disabling akf will also disable it along with some other stuff.

Dtc 20 is not handled in the control bits. It is disabled the same way you were able to disable the running losses valve. It's triggered because you don't have a check engine light bulb.

I changed the name for that DTC 50 Evap to "DTC 50 - 3/2 Way Running Losses Valve" for the next XML definitions revision.

Because MS41.0 has very different 'pattern' and logic in the dtc section of the flash.

I compared the MS41.1 and 41.2 dtc area (Using wols) and the order and pattern of arrangement are the same. However in MS41.0 they are very different and you cannot easily correlate them for that version.

Byte 7 was the same on both tunes - 9 in decimal system, so akf was enabled for both (bit3 = 1).

So it exists, just is not defined?

Yeah, either Alec or myself will have to load up an MS41.0 file in IDA, then identify some basic things based on MS41.2 stuff and then search for these various references in the code to come up with a DTC list for MS41.0. He has an MS41.2 so he doesn't care about the MS41.0 too much either. It's a fair amount of work.

Yes. I was stating that disabling AKF was an alternative to disabling that specific DCT.

His original bin is probably like the 5 series bin- AKF is enabled, but 3/2 wege DCT byte is 00d.

That is for MS41.0? I need to set it to 00 or some other value to disable that DCT?

Didn't you already say you did that?..

Yes on MS41.2. On MS41.0 I didn't had that error.