X5 - Used CAS, DME and KEYS Fitted - TCU Immobilized

[AutohausME]

Hi

Hope everyone is well.

I think this has been covered but I need a break down guide on what I need to do:

I have 2009 X5 4.8 V8 Automatic.

I had a CAS problem, so I have replaced CAS, DME and Keys from another vehicle. The car runs fine, but I can not select gears, the TCU has an immobilizer fault.

Should I be replacing TCU also on automatic vehicle? Please advise how this can be rectified.

Appreciated.

Mark

[purplecty]

I believe the e70 EGS has the ISN assigned to it that has to be reset with special tools to match the CAS and DME...

"BMW’s vehicles equipped with the ZF 6HP/8HP transmissions, and the EWS4 system (starting with the E70, X5), the transmission control module (Mechatronic) is mated with the DME, CAS modules for the specific VIN number and ISN/SK. When a transmission replacement is required, it is not possible to install a used automatic transmission without affecting the ability of the vehicle to function.
The EWS 4 system will prevent gear selection due to “non-matching” rolling code in the control modules, it is a security function.
You need to access ISN/SK to match."

[FAL]

I had a CAS problem, so I have replaced CAS, DME and Keys from another vehicle. The car runs fine, but I can not select gears, the TCU has an immobilizer fault. Should I be replacing TCU also on automatic vehicle? Please advise how this can be rectified.

If you can get the TCU from the original donor vehicle that the DME and CAS came from, you should be fine. The fault you have, is that the donor DME is not authorised to release the TCU. The ISN (Individual Security Number) and the associated SK (Secret Key) from the DME, doesn't match what the TCU is looking for. There's a flow of cryptographic data, that goes from your key, to the CAS, to the DME and then to the TCU. It's a "Client/Server" relationship, with the CAS being the SK server, and the DME and TCU being the SK clients. It is possible to rectify this at home (and I can help you), but it requires some expensive equipment and is time consuming. If you can't get the donor TCU, you're next best bet is to try a good BMW locksmith, as these guys tend to have access to good EWS (BMWs immobiliser software protocol) tools.

[purplecty]

FAL, isn't the EGS on the e70 part of the mechatronics?

[AutohausME]

Thanks for your help guys.

The "TCU" as I call it (EGS) unit is next to the ECM. I will check today if it is available from the donor car. Fingers crossed.

FAL, I am interested in what equipment we need if I were to have to change the ISN/SK? We are a garage and have some tools available to us.

Thanks in advance

Mark

[purplecty]

https://www.newtis.info/tisv2/a/en/e...module/XMCQxEA

[AutohausME]

Hi

Thanks for the info. Apologies for my error, I was looking at the VVT control unit next to the ECM.

I think I will need to look into changing the ISN/Sk

Please advise me accordingly.

Regards

Mark

[AutohausME]

Untitled.jpg

- - - Updated - - -

That is the gearbox in the vehicle just for your info

[FAL]

FAL, isn't the EGS on the e70 part of the mechatronics?

I honestly couldn't say, as my knowledge of the E7x platform is limited. I only used the "TCU" acronym because the OP did and to keep things simple. The type of gearbox control fitted isn't really too important, as the exchange of the encrypted data remains the same (although, to my knowledge, the gearbox control module is the only module to use the full ISN string). It's the version of the EWS protocol that the CAS3/CAS3+ is using, that's of real importance. The EWS3 protocol is difficult, but EWS4 with SOPT/SOPT+ encryption is when the serious mathematics comes into play. I'm not sure how much of this, if anything, people are interested in?

[FAL]

...now, if I had read the initial post properly, I would have voiced a different opinion, but I didn't and confused the conversation with talk about ISN and SK. Made myself look a bit silly, but never the less...

I had a CAS problem, so I have replaced CAS, DME and Keys from another vehicle.

I've replied to Mark's PM, but hopefully he won't mind me posting a brief point here: If the original CAS unit is damaged, all is not necessarily lost. If you're able to read all of the data from the Motorola-Freescale MC9S12/MC9S12X MCU processor using a good in-circuit programmer, then we can look at "cloning" the CAS. Again, I'm not sure if this is a topic that anyone is interested in, but I'll try to answer any questions.

[AutohausME]

Hi

Thanks for all your help, and the PM FAL. See below the 2 units I have. Hopefully they are compatible to clone.

I have sent to local specialist who say they should be able to do this for me.

Will update when I have an answer, fingers crossed.


20191204_080843.jpg

[AutohausME]

20191204_080843.jpg
Thanks for the PM FAL. I have sent both units to our local specialist who say they should be able to do the clone. Fingers crossed. I will update.

Attached is a pic of the two units I have, hopefully compatible.

Thanks

Mark

[FAL]

Attached is a pic of the two units I have, hopefully compatible.

The replacement CAS with the part number 61356943838, is very old and was manufactured in 2007, compared to the original CAS with the part number 61359147222, which was manufactured sometime between 2008 and 2010. The two modules aren't bilaterally or retrospectively interchangeable according to BMW. Having said that, the age difference isn't huge and if you look at the two labels, you'll notice that the hardware versions are the same ("HW: C4"). Assuming that the specialist knows his stuff, you should be fine...

For those that are interested in what the acronyms on the labels reference:
• MCV: Message Catalogue Version. The table of messages sent and received, that the CAS can understand.
• FSV: Firmware Software Version. The version of the permanent software in read-only memory.
• OSV: Operating System Version. The lower level software that controls the CAS basic functions. This is the version installed at the time of the CAS's manufacture. Can be updated or downgraded with certain software tools, such as WinKFP.
• HW: Hardware. The physical chipset and other associated electronic components.
• SW: Software. The higher level operating software. This is the version installed at the time of the CAS's manufacture. Can be updated or downgraded with certain software tools, such as ISTA-P or WinKFP.
• Cod: Encoding Variant. The coding parameters to control the behaviour of the CAS. This is the version installed at the time of the CAS's manufacture, but changes every time the SW is updated or downgraded.
• Diag.-Index: Diagnostic Index. The physical address of the CAS, on the vehicles internal electronic network. Every module has a unique one and it allows diagnostic, coding and flash-programming software, to find and communicate with each ECU.

[purplecty]

Great info FAL!

[AutohausME]

Good morning all and FAL

I dont think my local "specialist" 'does know his stuff lol.

Still having a headache this end.

Cut a long story short, If i were to send you the .bin file from the old CAS are you able to look at it and tell if it is ok? Or are the files not viewable?

Im at the point where I may send you the units and potentially buy a more suitable one from Ebay or something so you can clone for me if thats at all possible. Obviously you would be compensated for your time.

Regards

Mark

[AutohausME]

Update,

It transpires they didn't do as requested (read .bin and copy to replacement CAS). They "we swapped the processor and flash chip." from old to new.

So I would need to send you old unit (hopefully they haven't damaged it) and get a replacement CAS unit.

Can you help FAL?

Regards

Mark