Converting an MSS54/HP into an MSS54HP CSL (H-bridge)

[BobbySD]

:-D yes I was checking the orientation 100 time also :-D however if I put there old 29f200 with original data it works and I keep the orientation the same.
heinzboehmer yes I have data from this link. Maybe I will try the data from folder mss54hp csl - modified data. Chips were empty when I put them into the programmer. Simply I wrote bins and then solder them back. Makes me sick... :X

cant be there a problem with the ecu version? I have hw index 3 and I saw most of the guys have index 4

[NZ_M3]

I have noticed recently a lot of the chips have random data written into them for testing before they leave the seller and this results in them not responding when you solder them onto the board. Once it is zeroed out on a chip reader however the chips come back to life and can be flashed again via bdm on the dme. Just a thought.

I have also seen many that have soldered the chips on wrong way around 🙈 happens more often than you think even if you have done 100s of them. So just check pin1 is ay pin1🤣🤣

[heinzboehmer]

If you flash the chips with the full CSL binary then you've flashed everything necessary for the DME to work, including the boot sector. Here are the stock CSL full binaries: https://github.com/saildot4k/MSS54-X.../MSS54HP%20CSL

[BobbySD]

Hello again, Im still strugling with the issue above :X I bought new flash chips but its the same. It looks like the ecu just dont boot. Doesnt the CSL data need aby boot sector change? I read that you need to mod it if you want to flashthe ecu through winkfp. But in case of burning the original csl bins? As I wrote with original data ecu is working so the only possibility what could be wrong are those datas. Can anyone maybe share his bins? I moded the mss54 with Hbridge, resistors, capacitator as in the first page. Soldering is ok.

[BobbySD]

Yup, it looks to be split just fine. Have you tried communicating with the DME via OBD? Might let you know if it's behaving correctly or not.

yeaah, Ive got the ECU connected on the table. I put there original 29F200 and ecu is ok communicating, recognized by flasher, also I can connect with inpa no problem. But when I put there those 29F400 with splited flash its just dead. I also tried to get different flash chips from scrap ecus which I have here and same result.

[heinzboehmer]

Thanks mate, anyway still no go. Im dont know what Im doing wrong. Anyway I noticed that everytime I try to turn on the ecu it changes the data a bit. When I compare backup data with data I just download from the ecu it differs in few bits. That makes me think If the backup is correct as I cannot be sure right now. Do you think you can check if I split the data correctly? Even when its very simple task, Im being sceptic hehe. Thank you

Yup, it looks to be split just fine. Have you tried communicating with the DME via OBD? Might let you know if it's behaving correctly or not.

[BobbySD]

This is the correct way to do it. Make sure you're flashing the first half onto the master and the second half onto the slave. For reference:

Thanks mate, anyway still no go. Im dont know what Im doing wrong. Anyway I noticed that everytime I try to turn on the ecu it changes the data a bit. When I compare backup data with data I just download from the ecu it differs in few bits. That makes me think If the backup is correct as I cannot be sure right now. Do you think you can check if I split the data correctly? Even when its very simple task, Im being sceptic hehe. Thank you

[heinzboehmer]

I also get the CSL fullbin and simply split it in half and load to the flashes but again no go.

This is the correct way to do it. Make sure you're flashing the first half onto the master and the second half onto the slave. For reference:

[BobbySD]

Hello guys,
Im actualy in process of converting MSS54 to HP with CSL software. The car have also the flap. HW part is done resistors, h-bridge, 29F400 added. I just have a problem with software. I tried to put in the old data from 29F200 just with second half FF but doesnt work. I also get the CSL fullbin and simply split it in half and load to the flashes but again no go. Can you please advice me a bit how to correctly load the software? Splitting and so? I just desoldered the flashes 1000 times and I believe the pcb nor the memories like it that much... Thank you a lot!

[heinzboehmer]

1. Yeah that should work. Haven't tried it myself, but they seem compatible just by looking at the datasheet. Page 7 here goes over the differences between the chips: https://www.componentonline.com/prod...M29F400BB-55SI

2. Sure. As long as you've got something that can write to the chips via BDM, you'll be fine. Another option is to use a chip burner and write to the chips directly before installing.

3. Yup, I got all the software for my conversion from git. The car will drive just fine, but the tune won't be optimal. I just recently got a proper tune for my car and can tell that the engine is happier (power is up slightly, power delivery is more linear and all the other usual things), but I drove around for a year or so with the stock CSL tune with the cam offsets changed and experienced basically no driveability issues.

[Joshb556]

Hello, great write-up. I have a few questions regarding post #8. I only want convert my MSS54 to HP, to run a CSL map for CSL intake + MAP sensor.

1.) I noticed that the MS43 DMEs have the AM29F400BB-55SI0 chips in them. Could I just take two of those and use those (I have a few of these DMEs laying arond)? I do see that the AM29F400BB-55SI that is described is not readily available on a few of the sites I have searched. The AMD datasheet that I pulled up for the AM29F400B seems to make no distinction between the different chips. Is it possible to just erase the AM29F400BB-55SI0 and use it in place of the AM29F400BB-55SI? Alldatasheet seems to have the same description between the two. (B-55SI B-55SI0).

2.) Can I use an EEPROM burner aside from the Galleto using those 10 pin headers on the MSS54?

3.) Just to make sure, I am assuming the software being flashed && the tune etc... are the ones readily available on the git? Apart from a few modifications for the injector driver, non-CSL cam, Manual car etc... should this tune work on an otherwise stock (cat-less) S54?

Thanks!

[urban_e30_]

Thanks I appreciate the feedback

[ra2fanatic]

I have an mss54 that I need converted to an HP just to run CSL with the map sensor and the csl air box (no flap) for my e30 s54 swap. So far the only place I can find is Kassel Performance that does this. Has anyone had any experience with them doing this service? Is there anyone on this site or any other people that offer this service?

Don't overnight the ECU, because it won't be turned around in 24hrs. lol. They did it though.

[urban_e30_]

I have an mss54 that I need converted to an HP just to run CSL with the map sensor and the csl air box (no flap) for my e30 s54 swap. So far the only place I can find is Kassel Performance that does this. Has anyone had any experience with them doing this service? Is there anyone on this site or any other people that offer this service?

[heinzboehmer]

I was asked a couple things about flashing the full CSL binary onto the EEPROMs so figured I would post the info here too.

Each EEPROM gets half of the full binary. Splitting is just a matter of taking the 1024 kB binary and splitting it in half to form two 512 kB binaries. The first half of the full binary gets flashed onto the master EEPROM and the second half gets flashed onto the slave EEPROM.