Where is the "dislike" button? :frown2:
The ABS does not go through the ECM - It has it's own Pea-Brain attached to the pump!If it were me I'd ask them to re-flash or re-program the ECM before buying expensive parts that may or may not be the problem. We all know how a reboot can sometimes solve a computer glitch, and that may be what you are looking at here.
That would be a great option if I was certain that the pump was bad, but I am convinced that it is the electronics attached to the pump.Check the GS BMW section on advrider, there's a company in the US that'll rebuild ABS units.
(BMW ABS is even more spendy than Suzuki)
That is exactly the same symptoms I have experienced with my bike.That would be a great option if I was certain that the pump was bad, but I am convinced that it is the electronics attached to the pump.
This is because when the ABS light would go out, and I would apply the brakes for the first time, I could feel the pump modulating the brakes (even though it should not have been engaging for a slow speed stop). After that first stop, the ABS light would come back on and braking would return to normal.
:surprise:Bad news. They think it is the pump or electronics in the abs unit. The unit is not making the sounds it should make when you turn the key on, but the proper voltages are flowing through the harness.
The part is $1990. I'm already in for 1.5 hours of labor. Need another 2 hours to replace the unit.
I found the part on Ron Ayers for $1433, so they are probably going to match that price and offer a parts and labor warranty on the work.
I could get a salvage part on EBay for $450. But no guarantee it even works. ������������
I'm going to let the dealer do the work so that I have the parts and labor warranty.
Sent from Motorcycle.com Free App
Whoooly sh#t that's stuff is expensive. $200 for the sensors too. I would have got the fleabay part and DIY. Either that or buy the cheapo SDS tool myself for $295.00.
I can't believe the SDS tool cannot pinpoint your problems guys. :serious:
On my truck I had an ABS error all the time. Found a guy on Fleabay who rebuilds the electronic module for $50 bucks. I did that and it worked like a charm!
Yet is controlled by the ABS unit, so I am not thinking it is a sensor issue. Replaces yours and see what happens, much less money spent than on another ABS unit.My gut feeling is that is is related to the *rear* wheel sensor. The system thinks the rear isn't turning and starts modulating the front brake. It never seems to bother the rear. It doesn't do this all the time but I am sure that that is the root of it. It also seems to vaguely be related to rain or humidity in the air so most likely a connection/corrosion issue.
OK. Because the SDS port is the same for acquiring stored regular ECM as well as ABS fault codes I thought they might be talking to or through each other. The FSM definitely spends a lot of time on ABS diagnosis. I wonder why the BMW system is so different --there can't be that many ways to skin the ABS cat.The ABS does not go through the ECM - It has it's own Pea-Brain attached to the pump!
I have little risk here because the dealer is providing a warranty on parts and labor. If this does not solve the problem, they will have to continue to figure it out. I don't think they will make me keep the new unit if it does not solve the problem.