[andreyvl]

Hello, this is my first post and I want to appologize if this issue was disscused before, but I can't find a solution to my problem.
I bought a car which has a replaced TCU, but I can't acces it to configure bluetooth.
I get the errors:
-in ISTA+: "No communication possible with: Telephone Control Unit"

-in INPA I can't find the module (from ISTA+ it has 0x36 address, but I can't find it in the module list for that address)

-in NCS Expert I get "Ecu does not answer" error when I try to read TCUM
The thing is that I think the TCU is functional, because when I connect it the fiber light starts from the TCU.
Is there anything that I can do? (I'm sorry if is a silly question but I'm not very advanced, actually is my first bmw).

[Joe@TopGearSolutions]

What year is your car? Most likely will need an ICOM to code/flash anything on the fiber optic bus.

[andreyvl]

The car is from 2010.

[Joe@TopGearSolutions]

Originally Posted by andreyvl

The car is from 2010.

Unfortunately, someone will have to use an ICOM to connect to the TCU. I think you can do a SG_RESET in NCS or Tool32 using a KDCAN cable, but I'm almost certain that won't rectify your issue.

[andreyvl]

I tried SG_Reset, but I got same no response answer. So I can't do anything with K +DCAN cable?

[Joe@TopGearSolutions]

Originally Posted by andreyvl

I tried SG_Reset, but I got same no response answer. So I can't do anything with K +DCAN cable?

Not to that module..:

[ptpending]

thats not true, check if you replaced tcu working (getting power)
remove MOST and 54-pin connector and connect 54-pin connector back
do red light emitted from tcu most socket ?

[andreyvl]

Yes, the tcu emits red light when I'm connecting the 54-pin connector. That's why I don't understand why can't it be accessed.

[smass]

Does your car also have a MULF? Mulf can also do bluetooth. TCU is only needed for BMW assist/SOS.

[andreyvl]

Yes it also has Mulf2 high but is not functional. The fiber light is not working on connecting the blue connector.... I was hoping maybe I can make TCU to work.

[smass]

Is the mulf still in the fiber loop? All the components in the loop need to be functioning to communicate with any of them. Do you have i-drive? If so a combox retrofit may be the easiest fix for everything.

[smass]

Also, We can't read your screen shots so you may want to re-post them. It looks like some k-can faults but I can't tell.

[ptpending]

you need to remove mulf from most loop or replace it with working

[Pierre26]

Originally Posted by smassey321

Also, We can't read your screen shots so you may want to re-post them. It looks like some k-can faults but I can't tell.

For sure! look straight from the beginning Pic N°2 Ista tells you it 's Can communication problem ...
Inpa as well, i don't see the TCU and his address on your Pic N°3.
If you have an ICOM, use the Most_async connnection way and refire up Inpa, if you see the TCU, then it 's definitvely a Can wire(s) problem, where ? if you can ask the previous owner ... to not waste your time ! good luck.
PS: DSC and PDC are also gameover (can't see the third in the pic), so security risk also (Dsc).

[andreyvl]

I get also no communication with PDC and DSC, but my PDC functionality is working, is showing the right distance on the screen. Can I deactivate the pins from the MULF so there will not be open MOST circuit? Or should I just remove the wires for MULF?

[smass]

Did you set the latency to 0 in the USB port settings of Windows? If left at default, some modules won't communicate. This could make your problem look worse than it is.

[Pierre26]

Originally Posted by andreyvl

I get also no communication with PDC and DSC, but my PDC functionality is working, is showing the right distance on the screen. Can I deactivate the pins from the MULF so there will not be open MOST circuit? Or should I just remove the wires for MULF?

No MOST loop is only HW wiring manner:
What i would first do is powering the Mullf (+verifying that 12V and ground are ok on your plug) then see if the light is sorting out of one of the 2 optical Mulf.
If you want to test Ista correctly, you will need to shunt the optical fiber between TCU-Mulf to have the ring closed.

The can problem is another one as there is no can wire for Mulf.
(But probably for TCU, don't verified that), sure for Combox Telematic only.

Don't think the latency time is a problem but you can verify in your driver parameter,short to do that.

[ptpending]

Originally Posted by andreyvl

I get also no communication with PDC and DSC, but my PDC functionality is working, is showing the right distance on the screen. Can I deactivate the pins from the MULF so there will not be open MOST circuit? Or should I just remove the wires for MULF?

you can remove MULF from the MOST loop on MOST concentrator under left rear backrest wheel arch part which can be easily removed
PDC and DSC are different beasts and that may mean that you have problem with wiring or module somewhere
for example sunroof drains are clogged and water damaged some module and it produce noise on CAN bus