Ned some help tracing my remote central locking problem. I have a 2004 E61 530D and the remote no longer works. I have replaced the diversity amp but still no joy. I have measured the voltage across the FBD (pin 2) and GND (pin 5) and get 4.5v, that’s as far as I can get to diagnosing it. What voltage should I be getting? I can’t measure continuity from the CAS pins (pin 33), because as soon as I unplug the CAS plug from the CAS module, I lose power to the diversity amp across those pins (does this then mean that there is continuity) What’s the next step? May be there is a break between the amplifier and the CAS? Can’t believe that this would only affect that one wire out of 40 odd, I have no other problems reported in DIS. How is this cable routed to the CAS module, through the roof lining and down the A-Pillar and down the dash?
Any help would be greatly appreciated.