Good Day to GS-911 owners,
Please would anyone who has experienced a similar situation let me know how they solved their problems, in case their solution may work for me.
I have a 2004 R1200C with Bosch Motronic engine management and I live 500km from the nearest BMW service agent. I bought the GS-911 to help me avoid unnecessary trips to the BM agent.
Although it is limited in its functionality for this bike, in this situation, it appears to have identified the source of my problem, if I can be sure I am correctly interpreting what it is telling me.
The R1200C has run well since I purchased it in 2015 with 12000km and started and ran faultlessly until about 12 months ago when I noticed the ABS warning lights failed to extinguish once the bike was travelling as it had done in the past. The ABS was still
fully functional, however.
A while later, the bike started to cut out on deceleration requiring restarting to continue travelling. Not long after this, the bike became hard to start until it stopped starting at all. Up to now the battery appeared to be good and was on a trickle charger
when the bike was in the garage. However, now the battery would only crank the engine for a short time before failing to do so. I changed the battery, but the new one does the same thing. I have tried starting the bike using a jump starter, which continues
to crank the engine, but the engine does not start and sometimes back fires loudly.
Would this prove that the problem is not the battery, or can it still be that it needs a new good battery in the bike? I have read that these models of BM with the Motronic ECM and ABS that activates the hydraulic pumps before the bike starts are demanding
on batteries. (The battery is smaller than you would expect for this duty, I think around 20Ah compared to the 30Ah battery in my 1984 K100RS).
The GS-911 is telling me that the TPS is faulty and requires replacement. I have purchased a new TPS from the BM agent, who told me he had to order it, as they never fail. I would change it to confirm whether or not it is the TPS at fault, but unlike most other
BMs, the TPS on the R1200C requires removal of the whole rear end of the bike to access it in the airbox to replace it, (which supports the agent's belief that these do not fail). I do not want to embark on this to find that replacing the TPS does not rectify
I did read of a case in Queensland, Australia where a R1200C owner with a GS-911 had a similar problem, but instead of removing the rear half of the bike, he cleverly cut the side out of the airbox to access and replace the TPS and then replaced the cutout
and sealed it. The bike started and ran perfectly and he set off on a 1600km trip with his brother.
Does the GS-911 TPS error message definitely identify the TPS as faulty, or can the fault be some other factor that influences the TPS performance?
Any assistance on this issue would be very welcome.