General Category > Technical
K1200S ODOMETER
martyoz:
Folks hi from Queensland Australia !
Members at different bike forums suggested I post on here, recently I purchased a 2006 K1200S which runs like a Rocket. However after initially thinking my fuel consumption was atrocious have discovered that the Odometer is reading in Miles even though it displays KM ?????
After posting on the other Forums and taking the bike into both BMW Dealership and an ex BMW Motorcycle mechanic shop for Diagnosis, no fault could be found or Software error seen ! WOW !
A chap in Germany sent me photos of the Front Wheel Sensor Ring, there are two used : 2005-2006 with 100 "teeth" & 2007 onwards with 48 "teeth".
My bike appears to have had the ring replaced with a 48 "teeth" ring ??? Can one of you please confirm for me that if the Software is correct then this Front Wheel Sensor Ring is the probable cause of my Odometer being incorrect ?
Cheers and thanks from Marty :)
WayneC:
The first step would be to determine if the speed signal comes from rear wheel or front wheel, I am not familiar with the K1200S so I dont know which, but on other models I am familiar with it comes from the rear wheel & the signal goes first to the ABS then extended to dash on ABS equipped models
The other aspect is that if it is just a change in the sensor ring then the speedo would also display mph rather than kph which should be rather obvious so it would seem more likely to be a setting in the dash which may either be a coding parameter or a hardware link which has changed ODO reading only & not the actual speedo display.
Jughead:
If the ABS ring is the incorrect one, then both front and rear are incorrect. They work together, and if they are different it is impossible for the ABS unit to determine wheel speed, with the result that you would have an ABS error as well.
Your bike is an '06 model, so most likely has servo assisted ABS, correct? The older servo assisted ABS units use the 100 tooth ring. Gen II ABS (non servo assisted) use the 48 tooth ring.
Have you tried changing the coding from mph to kph?
martyoz:
--- Quote from: WayneC on August 25, 2018, 03:15:31 AM ---The first step would be to determine if the speed signal comes from rear wheel or front wheel, I am not familiar with the K1200S so I dont know which, but on other models I am familiar with it comes from the rear wheel & the signal goes first to the ABS then extended to dash on ABS equipped models
The other aspect is that if it is just a change in the sensor ring then the speedo would also display mph rather than kph which should be rather obvious so it would seem more likely to be a setting in the dash which may either be a coding parameter or a hardware link which has changed ODO reading only & not the actual speedo display.
--- End quote ---
Wayne hi, mate two BMW trained Technicians have been unable to Diagnose the defect ?? To be honest I don't think they have a high level understanding of the Software / Computer Parameters used. I myself do not have diagnostic tool and am in the dark !
Speedo is definitely from Rear wheel and unaffected by the Front Sensor. I was hoping a Guru on this Forum would be able to confirm my theory.
martyoz:
--- Quote from: Jughead on August 26, 2018, 01:02:06 AM ---If the ABS ring is the incorrect one, then both front and rear are incorrect. They work together, and if they are different it is impossible for the ABS unit to determine wheel speed, with the result that you would have an ABS error as well.
Your bike is an '06 model, so most likely has servo assisted ABS, correct? The older servo assisted ABS units use the 100 tooth ring. Gen II ABS (non servo assisted) use the 48 tooth ring.
Have you tried changing the coding from mph to kph?
--- End quote ---
Jughead you are incorrect, the Computer software Mathematically calculates Front pulses divided by Rear pulses. 100/78 or 48/78, the Value is then used for ODOMETER & ABS Braking Control (reaction). Rear 78 pulse sensor is all that is used for SPEEDO.
BMW Technicians don't understand the Software or Parameters and Calculations used, I have no Diagnostic Device with which to change anything !
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