General Category > Engine related issues

ECU not Visible - 2000 R1150GS

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WayneC:
No worries, good to hear you are getting it all sorted, Jughead is the one who should be thanked, he shortened the test process I was leading you down

Onions:
Well the bad news is it ain't sorted. I'm even more confused now.

Started was running great got 100M down the road and just stopped dead.  Came home made sure fuel in the bike, put GS911 on and tested saw the ECU 2 fault codes Hall Sensor. This is new so I know it can't be that. Turned bike off had a ponder turned bike back on and it can see the ECU but not retrieve the fault codes. Do u think it could be the side stand switch say got a bumped and failed - what is the best way to short it out so that is always on? Start there first I think.

WayneC:
As I indicated previously I am not really familiar with the 1150 model but side stand switch issues could well be a factor, on the 650GS a wire loop can be made with 1/8" spade connectors to plug into the side stand switch connector to bypass it without damaging/modifying the wiring. Rather handy in the spares kit out on the road

The side stand switch configurations I have seen are 3 wire, one wire is earth and the earth is extended to one or the other of the 2 wires dependent on whether the stand is up or down. That means it is safe to simply join all 3 wires with the loop plug but I would suggest checking it is the same on your 1150 before trying it

Onions:
Yeah I will check with meter first - don't know what else it could be except switch or the Motronic. I know a BMW Twins Mech here but he is way to busy to even look at it and good BMW Mech are rare here so have to do it myself. He said he doubted that it would be the ECU as they rarely fail.

WayneC:
I would tend to agree re the Motronic, the ECU's I am familiar with are very robust and a couple on my test bench should be dead from the treatment they received before I acquired them but they still perform properly

One odd fault we have seen in other models with diodes in the starter circuit lockouts is ultra sonic welding failing and glass encapsulated diodes cracking. In one infamous case here dealers could not resolve where the machine would start and then stop the diode connections would be OK when cold and then break connection when hot or subjected to vibration. It was a 50 cent repair with replacement diodes from an electronics store but a pain to track down

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