Aloha everyone. I am posting this in the hopes that someone has already been down this path and can offer some guidance as to how to proceed.
Background:
I have a new-to-me 2009 G650GS singe-cylinder with approximately 6000 miles. I installed a 1" Kouba link and greased all of the rear suspension joints. Shortly thereafter, the ABS light would come on after about 15-20 miles. Sometimes - but not always - this was accompanied by the speedometer/odometer going out. Turning the bike off and then back on would reset everything but the light would come back on again in 15-20 miles, as before. Eventually, the problem progressed to the point that the ABS light is now always on and the speedo/odo do not function.
I recently received my GS911 wifi and tested the bike with these initial results, 2 BMS faults and 4 ABS faults:
BMS:
821: Speed sensor (rpm), signal implausible
Currently present: NO
Occurrence count: 32
1280: Speed signal (vehicle speed), signal implausible
Currently present: YES
Occurrence count: 5
ABS:
25380: Front wheel speed sensor: Signal implausible
Currently present: NO
25409: Rear wheel speed sensor: Sensor clearance incorrect
Currently present: NO
25406: Rear wheel speed sensor: No signal
Currently present: YES
25408: Rear wheel speed sensor: Signal implausible
Currently present: NO
I then cleared all of the fault codes and went on a short ride. As before, the ABS light was on and the speedo/odo was not functioning. I then repeated the testing with the following results:
BMS:
821: Speed sensor (rpm), signal implausible
Currently present: NO
Occurrence count: 34
1280: Speed signal (vehicle speed), signal implausible
Currently present: YES
Occurrence count: 5
ABS:
25406: Rear wheel speed sensor, No signal
Currently present: YES
I see no obvious damage to with the sensor or to the sensor ring mounted to the rear wheel. The clearance measures approximately 0.6mm, within the specified range of 0.1 - 1.3mm.
Would I be correct in assuming that the fault lies with the rear wheel sensor? I have seen conflicting reports as to whether the sensor can or can not be tested. If it can, what are the tests and can they be done with a general volt-ohm meter? If not, is there a consensus on what to do next? Should I just replace the sensor and see if that corrects the problem?
I would appreciate any feedback.
Mahalo!
doc
