BMW 530D E60 no communication via OBD, central electronics fault

[WinWoj]

Hello folks,

I can't obd diagnosis via OBD. There is BMW E60, 2004MY, 7 pin in OBD only. As I saw in documenntation, There is gateway for link diagnostic D-BUS with rest of the modules, and it is SGM (Airbag with gateway).

So if I cant talk with SGM ECU, but can talk with modules connected directly with PT-CAN (i forcce PT-CAN via tester) so I think there is SGM problem. My question is: is it possible, that SGM (gateway) fault can freeze central electronics function like power windows, wipers, wheel switches...

SRS diode lights, engine run (but no RPM, Speed, temperature info in dashboard)..

PT-CAN is alive inside bus, so car run and esp transmission function OK in bus, CAS also but in PT-CAN there are many communication faults..

K-CAN diagnosing impossible using tester, but signal seems to be OK.

Bytefly bus not checked, but red diodes for fiber lihting...

Somebody had such situation and solved it?

Best Regards.

[WinWoj]

mates, somebody has experience? I opened SGM ecu, measure supply like 5V for ic's and found, also checked K-line (d-bus) patch on pcb and seems to be good.

What do you think, that this ecu after power supply 12V to terminal 30 and 15WUP and ground, stil send something to d-bus (in obd connector fllap is resistor).
But that message is very strange- like open colector output, voltage ride with delay, and after obd-tool conect and start transmision signal change - more "0-1" style.

452635 452636

Is it normal?

BR

[Levanime]

check vin numbers,
if your gateway has differnet vin number (i.e. its replaced) it will not communicate with other modules
easy fix

[Tomppa78]

Do you get this working? i am curious because i have same symptoms in my own car :)

[erion97]

Did anyone sort this problem out ?

[djnovy]

No water damage?