Quote:
Originally Posted by bmw540san
In my case and with the very same symptoms and after checking all the usual culprits, I discovered that I had broken wire under the rubber "snake" in the right rear upper corner
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Finally got some more time to pursue this issue and although I had power just fine on the wire you found broken above I wasn't sure about the wire on pin3 at the FZV amp as it reacted to the key press but didn't show voltage without a key press.
So I bypassed the whole wire from FZV to GM3 with a temporary wire through the car interior. No response... Tried the key resync that I have tried a million times before and the locks cycled and all working!
I removed the rubber boot and some headliner but no exterior signs of a wire break. I must have disturbed something though as when I removed the bypass wire the remote still works.
I will monitor the situation but if it stops working again it won't be too difficult to splice in a repair section.
So a big thanks to bmw540san and thanks all for all your input.
