If you look at the schematic you will see the diagnostic port does not connect directly to the CAN bus, it connects to the CJB.

 

Not sure what schematics you have but mine shows direct connection to CAN bus!

 

Yes, you are correct. I was interpreting the diagram incorrectly.

 

obd socket lr2

of cause you are right and my measurement does not say anything ...
but finaly, according to the bus it could be every device and it needs oscilloscope to under stand whats wrong.
otherwise I need to unplug every controller until I can access the bus

 

That is where SDD comes in. It will check every device on the bus and eliminate the ones that are working properly. Also it will tell you the proper places to check for the problem and the method of testing out the bus//modules. A scope will tell you very little since every module transmits on the bus and you would have no idea which ones or what it is 'saying'.

 

I find the best place to start is at the OBD port and see if there are shorts to ground/B+ on each bus and that each bus is properly terminated.

 

hi guys, it takes a time but now I tried several things to understand the situation.
finally there is a big question without answer, why does the hazard light start when plug the battery even the RCM is not connected?
can anyone help me the question, which condition makes the CJB starting the hazard lights?

 

A bad hazard lights switch would do it, but with your other symptoms I would consider the possibility of water damage behind the glove compartment where all the junctions and cable bundles live. It could also be one or more of the cable bundle connectors are loose and need reseating.

 

hey, thanks for your input. unfortunatelly the switch isn't it. works fine.
water might be, but must be a long time ago. the problem is now given for about 1 year. of cause I had unmounted the glove compartment. no optical anomalies.
in the init post I forgot to say, I changend CJB, ECU, key etc ... to eliminate this parts as a problem.
same same, "system engine fault", no connection to obd.

and I tried to disconnect everything on the high can, same.
I disconnected nearly everything, plug batterie, hazard flashes

could that be a short circut in any cable next to CJB

 

Looks like you got yourself a basket case. I have no more ideas other than trying to trace the wiring to see where the problem lies. Start with the obvious, all junctions and places where cable bundles make tight turns.