I'm trying to make a tune for my 2001.5 S4 with tiptronic and L-Box ECU. I was trying to modify the LDRXN table, but it doesn't seem to make any difference. I saw in another post about the 551R box that it has 2 different LDRXN tables, one for auto and one for manual. Is this true for the L-Box (which always has auto trans) also? I'm using an M-box xdf file that only has LDRXN_1_A defined, so I'm assuming I need to edit the LDRXN_0_A table. If this is the case I would like to know the location of the table.

Some background: I'm logging using me7logger and get a max rlmx_w of ~140. rlmax_w never goes above 130, which limits rlsol_w to < 130 also. In s4wiki it says that rlmax is limited by KFTARX, but I have set all values in the range I'm targetting to 1 for all temps, so it shouldn't be that. rlmax_w never seems to budge when modifying LDRXN_1_A, so I'm pretty sure the problem is that I have the wrong table location. I can send my bin file if that would help.

Any help is appreciated as I'm a bit of a noob at this.

Good to know, apparently that isn't my problem then. But somehow it appears that rlmax is not following LDRXN at all.

Are you saying I should post this problem on the Community Project: Stage 1 2.7T S4 thread? I read over the whole thread and couldn't find anything relating to my issue. I found the thread pretty convoluted to follow also, but I can try if you think that would be the correct place to start.

Pretty sure it's not HBN, although I could be missing something. I'm setting LDRXN to be ~160, which as I understand it should not hit HBN. I also tried the NVR Stage 2++ map for KFLDHBN and it still gives the same result. No matter what I do rlmax won't go above ~120.

I'm starting to think maybe it's a problem with a sensor, but it's really weird since the MIL isn't on and a regular OBDII scanner doesn't find any codes. Somehow NefMoto picks up P1548, P1453, P0333, P1131, and P1457, which are relating to EGT and O2 sensors. I deleted and disabled the SAI and disabled the rear O2. I am also running the 2.0T coil packs with the associated tune changes.

Anybody have any ideas? Why would NefMoto pick up DTCs that I can't find with other readers?

OK, here is a log from ME7Logger including those variables. You can see rlmx going above 160 but rlmax stays at < 120.

Looks like req load is following ldrlms (from LDPBN), which means B_brlmx is set...

I'd get VCDS and do a proper scan for codes.

From the FR:


Looks like if the instrument cluster detects an error in coolant or oil temps, B_brlmx is set.

Don't bother doing any further tuning until you get rid of ALL your codes. Period. You're asking for trouble if you are doing this w/o VCDS...