scopeusa
Retired, riding bucket list around the world
I had an ABS problem back in 2016 on my 2012 XT1200 when I kept getting fault 63, the front brake master cylinder pressure sensor come up. I tried everything and did get it to reset once which lasted about 30 miles. One odd thing was if I left the bike standing for a week or more the ABS light would go off and reappear anything after a few hundred yards to five miles. Because I had exhausted my options and being on a Caribbean Island I had no access to a dealer I decided I would ride without ABS and get around to fixing it. Well time flies and that was 18 months ago. Now not only the ABS light is on but the engine light turned on the traction control and the speedometer has quit.
I bit the bullet and purchased a new ABS controller. The install is not really difficult and the bleed seemed quite straight forward. The difficult or most treacherous part being the ABS ECU connector housed in a very tight space but with the hydraulic unit out of the mudguard section you can see exactly what you are doing and you have every confidence that the connectors are mating and aligned perfectly.
I connected the ABS test coupler and to my dismay the ABS light gave me two faults, 16 and 33. 16 being the rear wheel sensor, which did not surprise me as I guessed that may have been what caused the traction/control and speedometer fault; however 33 was not expected, it comes up as ABS motor defective or no power supplied to the ABS motor! I checked all three fuses, ABS motor, ABS Solenoid and ABS ECU and they are all good. I have measured ABS ECU voltage at the pins on the ABS ECU plug as detailed on page 8-130 of the Yamaha manual (2010) Positive BR/W Brown/White (1) and Negative B Black (2) and record 13.4 volts (lithium battery). The Brown/White shows up on my XT(1200Z(Z) 2010 as the going to the ABS solenoid fuse. I have just realized that that is not the ABS motor supply!
Does anyone have a full pin out of the ABS ECU connector? I am assuming the rear wheel sensor is responsible for the speedometer? Is there any way to test a wheel sensor? I have tried resetting the fault codes but I guess you cannot reset a fault code that is still there. I assume that the ABS fault codes are held on the ABS ECU and not the main ECU?
I guess it’s back to probing out the harness although everything I have checked/inspected looks as if it came off the production line yesterday not a hint of corrosion. Engine ground, frame grounds all look excellent.
Any help suggestions would be greatly appreciated. As far as I know not many bikes suffer from ABS Hydraulic unit failures. Cheers
I bit the bullet and purchased a new ABS controller. The install is not really difficult and the bleed seemed quite straight forward. The difficult or most treacherous part being the ABS ECU connector housed in a very tight space but with the hydraulic unit out of the mudguard section you can see exactly what you are doing and you have every confidence that the connectors are mating and aligned perfectly.
I connected the ABS test coupler and to my dismay the ABS light gave me two faults, 16 and 33. 16 being the rear wheel sensor, which did not surprise me as I guessed that may have been what caused the traction/control and speedometer fault; however 33 was not expected, it comes up as ABS motor defective or no power supplied to the ABS motor! I checked all three fuses, ABS motor, ABS Solenoid and ABS ECU and they are all good. I have measured ABS ECU voltage at the pins on the ABS ECU plug as detailed on page 8-130 of the Yamaha manual (2010) Positive BR/W Brown/White (1) and Negative B Black (2) and record 13.4 volts (lithium battery). The Brown/White shows up on my XT(1200Z(Z) 2010 as the going to the ABS solenoid fuse. I have just realized that that is not the ABS motor supply!
Does anyone have a full pin out of the ABS ECU connector? I am assuming the rear wheel sensor is responsible for the speedometer? Is there any way to test a wheel sensor? I have tried resetting the fault codes but I guess you cannot reset a fault code that is still there. I assume that the ABS fault codes are held on the ABS ECU and not the main ECU?
I guess it’s back to probing out the harness although everything I have checked/inspected looks as if it came off the production line yesterday not a hint of corrosion. Engine ground, frame grounds all look excellent.
Any help suggestions would be greatly appreciated. As far as I know not many bikes suffer from ABS Hydraulic unit failures. Cheers