General Category > R1150 models

R1150GS // Idle Switch Position odd??

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Nicol Carstens:

--- Quote from: schuppi on August 02, 2018, 12:20:48 PM ---My thoughts!

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Noted and appreciated.


--- Quote from: schuppi on August 02, 2018, 12:20:48 PM ---In order not to confuse the expert, HEX may be able to adjust this ad in a future update. ;)

--- End quote ---

I always vote for reduced confusion! As the latest member of the PC App design team, I promise to look into it with the team. It had both myself and Holger confused in the last week. My understanding is that some source motivated the phrasing... but that's before my time. Will have a fresh look at it.

Best,
Nicol

BeemerKOS:
For information - I had a TPS which after 114K miles would not give a steady output at idle. I discovered this looking at the output trace with the GS911 trying to work out what was causing a very erratic idle. The TPS was giving 350mA but then occasionally dropping to zero. So new (or 2nd hand but lower mileage hopefully) aquired and tried to fit. However the TPS setup on the GS911 kept reporting idle switch on regardless of where I positioned the TPS even onto the stop. So the only way I could set it up was using the multimeter 350mA position. This done I then started the bike and monitored the Motronic outputs. Once the engine was warm the idle switch reported as off. I could then check the TPS with the GS911. All OK, smack in the middle of the setup zone. So it would appear that the Idle Switch ON/Off may be tied to TPS position but is obviously also affected by engine temperature. The other observation was looking at the O2 trace the fuel mixture was also very rich until the engine warmed and the lamda went into closed loop.  Old topic but may be useful to someone who like me is still running the old 1150s.

Jughead:

--- Quote from: BeemerKOS on June 26, 2019, 09:18:08 PM ---I had a TPS which after 114K miles would not give a steady output at idle. I discovered this looking at the output trace with the GS911 trying to work out what was causing a very erratic idle.

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I have seen very few 1100/1150's give a steady output at idle.  Due to wear, the butterfly shafts often vibrate as the vacuum from the cylinders pulsates through the throttle bodies and past the butterflies.   Since the TPS is attached to the same shaft, it will give erratic readings, more so on the higher mileage bikes.

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