Flashing SP15A EGS with SP18A

[ab987]

Hi,

Wanting to flash EGS software from an SP18A car (G80 M3 CS) onto my SP15A car (F97 X3M) using E-Sys.

What I've done:
- I've pulled FA and modified it in E-Sys to reflect type code 63AY and a build date of 11/22. My original I-Level is 19-11-550, so I was targeting that I-Level for SP18A and I wasn't seeing any updates to EGS7 SWFL.
- Changed shipment I-Level in the calculator to 22-11-550 instead (a valid M3CS build date) and now it shows the right BTLD for the M3CS (5F6D_014_027_003, a valid update for my car when I use my real I-Level and SP15A), CAFD (40EB_001_001_023, also a valid update for my car), SWFLs (5F6F_050_060_000 and 5F70_019_060_000), and some SWFK that I haven't confirmed (8FB7_160_077_004). HWEL is the same at 4326_030_014_003.

The problem arises when trying to generate a TAL, given there are a bunch of modules that are different between SP15 and SP18 (ATM, BDC_BODY and BDC_GW, DSC, FLM, LMV). It fails with the following:

Code:

Generating TAL failed! [C041]
no Updater found for SGBMID-Ist btld_00006d9d-001_000_000 [1655]

This arises a few questions:
- Does anybody know if there are major communications differences between SP15 and SP18? According to TIS, the cars have the same EGS wiring diagram. They also seemingly share the same bootloader (and coding) which makes me think I should hopefully be able to communicate in flash mode.
- Is it possible to generate a TAL for only the EGS here? I'm thinking I can generate a TAL for my car and edit the SVT target with the EGS targets that I'm going for. If the DSC has different CAN messages I can't update anyways considering I don't have the same DSC hardware as a G80, so my hopes are that it either works or it doesn't (and I flash it back to what it is now).

Thank you greatly.