[rjahl]

Originally Posted by The_Dealer

Write protected would probably be a better term. Don't know how I could go about getting it removed, but I literally just did the MSD81 upgrade 2 days before I tried mhd and don't really want to sink another $500 bucks into finding another one and having it synced with my cas/key. I'd rather drop that on a jb4 and have some fun.

If you purchased this DME from someone other than a dealer, they used tools to make it work with your car. It sounds like they left the DME in a state that does not play well with MHD.

With my limited knowledge, I'll try to explain.

All of the BMW modules are programmable over ODB using BMW tools. This is how BMW utilizes common modules and gives them an update tool when new software released.

The BMW tools utilize several security keys/protocols to protect the hardware. These are a Seed and response authentication that BMWs tools utilize to gain access to modules over ODB. There are several security levels on each module.

The security key only provides access to flash and read the DME, the main defense against unauthorized software is the RSA signature check performed after an ODB flash. At the end of the flash process, the program will check the new data and confirm the RSA signature, if the check fails the DME will switch into a "recovery state", often mistaken for a Bricked DME.

Most of the time when some one talks about an "unlocked" DME they are referring to an RSA defeat. When you have the RSA defeated, you can flash custom files/tunes over ODB without the proper BMW RSA signature. The RSA signature is too difficult to calculate with existing personal computers.

Some of the tuners and aftermarket flash tools will modify the ODB access security keys to prohibit access to certain levels. Once the key has been changed from the BMW original, there is little chance in bypassing them using other ODB tools.

It may be possible to use BMW tools Winfkp / expert mode to flash the DME back to stock but I would not attempt that without some form of a back up plan if the flash fails to authenticate. It's simply impossible to know what modifications have been made to your DME program.

I would try to read the DME using BMW tools such as INPA and Winfkp diagnostic tools to see if you have any access to the DME.

If those tools don't work, go back to your DME vender and push them for a resolution.

[The_Dealer]

Originally Posted by rjahl

If you purchased this DME from someone other than a dealer, they used tools to make it work with your car. It sounds like they left the DME in a state that does not play well with MHD.

With my limited knowledge, I'll try to explain.

All of the BMW modules are programmable over ODB using BMW tools. This is how BMW utilizes common modules and gives them an update tool when new software released.

The BMW tools utilize several security keys/protocols to protect the hardware. These are a Seed and response authentication that BMWs tools utilize to gain access to modules over ODB. There are several security levels on each module.

The security key only provides access to flash and read the DME, the main defense against unauthorized software is the RSA signature check performed after an ODB flash. At the end of the flash process, the program will check the new data and confirm the RSA signature, if the check fails the DME will switch into a "recovery state", often mistaken for a Bricked DME.

Most of the time when some one talks about an "unlocked" DME they are referring to an RSA defeat. When you have the RSA defeated, you can flash custom files/tunes over ODB without the proper BMW RSA signature. The RSA signature is too difficult to calculate with existing personal computers.

Some of the tuners and aftermarket flash tools will modify the ODB access security keys to prohibit access to certain levels. Once the key has been changed from the BMW original, there is little chance in bypassing them using other ODB tools.

It may be possible to use BMW tools Winfkp / expert mode to flash the DME back to stock but I would not attempt that without some form of a back up plan if the flash fails to authenticate. It's simply impossible to know what modifications have been made to your DME program.

I would try to read the DME using BMW tools such as INPA and Winfkp diagnostic tools to see if you have any access to the DME.

If those tools don't work, go back to your DME vender and push them for a resolution.

Well I got the dme used then sent it to this this company along with my cas/key https://m.ebay.com/itm/BMW-MSD80-MSD81-DME-Upgrade-Cloning-Matching-Service/263541468022?_mwBanner=1

The company I sent the dme to swears up and down they don't do write protection so I'm not sure what to do other than try to find another dme and have a different company do the sync. I still have my msd80, so maybe another option would be to send that one off for repair. I was getting a constant ambient pressure sensor code with my msd80

[mfractal]

Originally Posted by The_Dealer

Well I got the dme used then sent it to this this company along with my cas/key https://m.ebay.com/itm/BMW-MSD80-MSD...22?_mwBanner=1

The company I sent the dme to swears up and down they don't do write protection so I'm not sure what to do other than try to find another dme and have a different company do the sync. I still have my msd80, so maybe another option would be to send that one off for repair. I was getting a constant ambient pressure sensor code with my msd80

If I were you I'd contact the company and as for my money back nicely. You are protected by Ebay buyer protection and should get your money back easily. After all they sold you an ECU that is not behaving as any other N54 ECU. Once you get your money back purchase a MSD81 upgrade service from one of the reputable guys (can get you references) and install it.
I know it will require a bit of downtime on your part but it'll be worth it eventually. You don't know what else you'll discover isn't working with this ECU down the road...

Edit: I just re-read your post and saw you got the ECU and the unlocking service in separate places. That might complicate my suggestion as we don't know who's at fault here, ecu seller or the coder.

[rjahl]

Originally Posted by mfractal

If I were you I'd contact the company and as for my money back nicely. You are protected by Ebay buyer protection and should get your money back easily. After all they sold you an ECU that is not behaving as any other N54 ECU. Once you get your money back purchase a MSD81 upgrade service from one of the reputable guys (can get you references) and install it.
I know it will require a bit of downtime on your part but it'll be worth it eventually. You don't know what else you'll discover isn't working with this ECU down the road...

Edit: I just re-read your post and saw you got the ECU and the unlocking service in separate places. That might complicate my suggestion as we don't know who's at fault here, ecu seller or the coder.

It will be the company that synced the CAS/keys with the DME. It's possible the replacement DME was locked however the company that paired the CAS should have insured all of the DME programming was in order. It's likely they just pushed in the CAS keys over BDM and never looked at anything else. I would have used a known doner DME for the program and calibration file or rebuilt them from the BMW Daten files.

Either way I can't imaging a reputable company not wanting to help you. Be polite and give them all of the information they need. I see they have a 100% reputation, I'd bet they like to keep that.

Have you tried reading the DME with BMW standard tools, INPA, Tool32 Winfkp? Can you do a UIF read?

[The_Dealer]

Originally Posted by rjahl

It will be the company that synced the CAS/keys with the DME. It's possible the replacement DME was locked however the company that paired the CAS should have insured all of the DME programming was in order. It's likely they just pushed in the CAS keys over BDM and never looked at anything else. I would have used a known doner DME for the program and calibration file or rebuilt them from the BMW Daten files.

Either way I can't imaging a reputable company not wanting to help you. Be polite and give them all of the information they need. I see they have a 100% reputation, I'd bet they like to keep that.

Have you tried reading the DME with BMW standard tools, INPA, Tool32 Winfkp? Can you do a UIF read?

Haven't tried that, how would I do it? I've got all the BMW tools as well as ISTA D

[rjahl]

Originally Posted by The_Dealer

Haven't tried that, how would I do it? I've got all the BMW tools as well as ISTA D

I'm a little reluctant to say much. You lack of knowledge can get you into serious problems pretty quickly.

Try INPA and select E90
Engine
MSD 80

Then look for a menu that pulls up memory and try reading the UIF section. That should be a start.

Would not hurt if you did some research on how to use iNPA and winfkp.

[The_Dealer]

Originally Posted by rjahl

I'm a little reluctant to say much. You lack of knowledge can get you into serious problems pretty quickly.

Try INPA and select E90
Engine
MSD 80

Then look for a menu that pulls up memory and try reading the UIF section. That should be a start.

Would not hurt if you did some research on how to use iNPA and winfkp.

I'll try that when I get home. Shouldn't I select msd81 though instead of msd80? I've used inpa and winkfp before, just never tried to read u if before

[rjahl]

Originally Posted by The_Dealer

I'll try that when I get home. Shouldn't I select msd81 though instead of msd80? I've used inpa and winkfp before, just never tried to read u if before

Ya, sure if you have MSD81 option use it instead.

[The_Dealer]

Well I ended up finding a BMW ecu place around Atlanta (about an hr away) that can get rid of the write protection and do an mhd flash for me. Seems like that's the best way to go