SIEMENS DME MSV70

[mehran]

hi firends

BMW Z4 2006
fault code 2f44 EWS preventing manipulation or electronic car immobilization system
EWS no dtc
key ok
remote ok
What should be done ?

[vuno01]

i believe its a checksum problem

[mehran]

mains download dme or the wiring is damaged ?

The owner had used non-standard car alarm and I got it disconnect .