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EWS! Austausch des Steuergeräts / Exchange of the control unit

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Bernd_Lukas:
Let's assume that the trial use of the new ring antenna is unsuccessful. How can you find out if the wiring harness connection between the ring antenna and the control unit is OK?

Jughead:
Just remove the covers from the 2 harness plugs on the DME.  you have 4 wires that run from the antenna to the DME, 2 of them being a yellow twisted pair.  Then just check for continuity from the plug on the antenna side to the same wire on the DME plug.  Check all 4 wires.

Bernd_Lukas:
Jughead, thank you very much. You obviously have profound knowledge!  To make sure I understood you correctly: I opened the wiring harness in the direction of travel on the right from the tank to the display because I suspected a broken cable there. There I found 1 twisted pair in white (or yellow) with two wires, which seems to be ok. However, the cable at the connector of the ring antenna leads under the tank on the left in the direction of travel. Should I open this bundle? Are both pairs of the 4 cables to be checked each a twisted pair? And do the two twisted pairs have a white colour?

Jughead:
You should not have to open up the harness just yet.  First check for continuity.

Your plugs on the DME should look like this:


Pull the slider on the smaller of the 2 plugs and unplug it.


Cut the cable tie


And remove the cap from the plug.


Here you will find the twisted pair (White with brown trace and white with black trace)


Check for continuity from the 2 pins (green arrows) to the plug on the antenna.  There are 2 other wires (cannot remember the colours (green/brown??? and white/blue???)) that also come out of the same bundle at the DMW.  (I think the pin numbers are 8 and 57.  Twisted pair numbers are 55 and 43 (I think))

Bernd_Lukas:
Hi Jughead, short feedback:
I plugged in the new ring antenna (hanging outside) and supplied with the spare key - result: EWS!, Bike is dead.
So I started to check the connection between antenna and DWS(-plug). First, the S 1000 RR is much (!) more much thinner cables in the connector. The color codes on the antenna plug were DWS plug hardly to identify. So I put a fine needle in the four "holes" on the antenna plug and the same on the DWS plug and measured the continuity with an Ohm meter in between. Result: three connections were "there" - but the white-blue cable to pin #57 is broken. I have bridged this cable with an alligator clip and - BIKE RUNS :-) :-) :-)

Thank you very much for your great expertise - without which I would have had to give the bike into the hands of my friendly (but expensive) BMW dealer.

Best regards
Bernd

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