freightliner class m2 2006 mercedes engine 906

[bekamon]

hello the engine start but don't run I make a diagnostic with scanner and show this fault code

Extra Smart Switch sid 20 fmi 7

I need to know what is that faul code

VIN 1FVACWCS67HX6843

MODEL 906

anyone can help me plesase

[manimal]

Freightliner M2s use Smart Switches, which are recognized by the bulkhead module by their resistance. In order to determine which switch is not programmed in / defective, you need to connect to the vehicle with ServiceLink and check switch parameters.

[bekamon]

the engine is run now, I was check the CAN signal between the ddec-ecu and ddec-vcu and this was wrong, I replace both module and the engine run now

thanks