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BMW m4 (F83) The FEM/GW ETHERNET CONNECTION IS DROPPING
#1
BMW 
This BMW was in a roller over accident and the Advance crash safety module (ACSM )deployed the driver door airbag and the driver side rear seat belt and the Roller Protection Bars up in the air. I release the two Bars and push them back down inside the roller bar cage with success to they click in place. Then i remove the old ACSM module and replace with new one bought from dealership, but before i did that the fem/gw re-animation fault was happening, it say it can't re-animate the ZGM and there is no communication with all down-line modules.

The BMW M4 F83 released 2014-07 as a Convertible, but the FEM/GW is causing a dropping in Ethernet connection every now and then. Terminal kl15 is been turn off & on again on the ISTAP mask but not on the car. It try to reanimate the Gateway (ZGM).
So some down-line modules on the BUS Network like the IHKA, DME, DSC, & REM does not respond and can't communicate with the Central Gateway module that is built inside the FEM module. This FEM is located at the passenger side right kick panel.

All fuse test Ok fine. But every time the istap- see the kl15 while identifying modules it would disconnect at times the ethernet connection on the laptop and connect it again.

Have anyone experience this issue before?
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The Pic below show voltage is on kl15 & Terminal 30
[Image: ISTAP%20DISCONNECTED_zpsdlrclvgd.jpg]
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This picture below shows kl15 & terminal 30 with no voltage
[Image: ISTA-D%20F83%20VCI%20SETTINGS%20TO%20DEA...fdgtoq.jpg]
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The Pic below shows which modules downline is not responding to the ZGM Central gateway Command
[Image: BMW%20F83%20FEM-GW%20DOWNLINE%20MODULES%...6qvcei.jpg]
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Can anyone solve this?
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