- Sep 2, 2012
- 468
So as per the subject, I've been dealing with an ABS issue that seems to be getting progressively worse. When it started, I had pressure washed all the recent snow, salt and grime off that day, and I assumed I had gotten some contact wet and it might resolve itself. So I watched it a day or two. My scanner doesn't have the ABS module, so I got Onstar to give me an ODD and they came back with the C0035 (front left sensor)
Over the next couple days I tried to pay attention to the conditions that resulted in various behavior. Sometimes it would do one thing, other times slightly different behavior. Then it warmed up a couple days, the ABS light cleared itself, and I figured my original assumption was correct.
But then it returned. Very low speed light brake pressure application would trigger the ABS when clearly there was no loss of traction. Then it got a bit worse, and I could hear the ABS cycling while just driving, with no brakes applied. That evolved eventually into the warning light (red circle with "i") accompanied by the warning chimes and a DIC message saying "Service Brake System". Onstar ODD now was giving me the C0035 plus a newer C0040. At this point, the warning light and the ABS light would both clear themselves shortly after startup on most ignition cycles, only to return as soon as I thouched the brake pedal.
Brought in to a friend (highly qualified custom bike builder Mike Haufe of XXX Chopper Works) we got it on the hoist inspected wiring, connections, ground tab - no issues observed. ABS connectors unplugged at wheel cleaned and reconnected. No change in behavior. His high end scanner was "visiting" elsewhere, so we couldn't go any further at the time.
One of the first things Roadie ever mentioned to me on this site was that at my mileage (bought July with 170,000km, now at 190,000) and with unknown service history, replacing hub assemblies in Spring might be up for serious consideration. Mechanic seems to think front left hub assy looks newer & has been replaced once before.
A thread on the OS with fairly identical problem description says the issue was resolved by pulling the sensors, and cleaning some stainless steel strip with a dremel - I'll track down a link later, but it didn't have pics, so I couldn't get a good feel for the process - anyone familiar with this?
So at this stage, while I look for a chance to pull the wheels and measure sensor output voltages, I thought I'd get some feedback here. Any thoughts on the above, weigh in please. Also, wouldn't mind hearing opinions on whether I should just do the sensors or just skip that and do the whole hub assy with integrated sensors. REALLY need some feedback on which brand hubs, country of manufacture, pricing, sources etc etc...
Thanx folks
Over the next couple days I tried to pay attention to the conditions that resulted in various behavior. Sometimes it would do one thing, other times slightly different behavior. Then it warmed up a couple days, the ABS light cleared itself, and I figured my original assumption was correct.
But then it returned. Very low speed light brake pressure application would trigger the ABS when clearly there was no loss of traction. Then it got a bit worse, and I could hear the ABS cycling while just driving, with no brakes applied. That evolved eventually into the warning light (red circle with "i") accompanied by the warning chimes and a DIC message saying "Service Brake System". Onstar ODD now was giving me the C0035 plus a newer C0040. At this point, the warning light and the ABS light would both clear themselves shortly after startup on most ignition cycles, only to return as soon as I thouched the brake pedal.
Brought in to a friend (highly qualified custom bike builder Mike Haufe of XXX Chopper Works) we got it on the hoist inspected wiring, connections, ground tab - no issues observed. ABS connectors unplugged at wheel cleaned and reconnected. No change in behavior. His high end scanner was "visiting" elsewhere, so we couldn't go any further at the time.
One of the first things Roadie ever mentioned to me on this site was that at my mileage (bought July with 170,000km, now at 190,000) and with unknown service history, replacing hub assemblies in Spring might be up for serious consideration. Mechanic seems to think front left hub assy looks newer & has been replaced once before.
A thread on the OS with fairly identical problem description says the issue was resolved by pulling the sensors, and cleaning some stainless steel strip with a dremel - I'll track down a link later, but it didn't have pics, so I couldn't get a good feel for the process - anyone familiar with this?
So at this stage, while I look for a chance to pull the wheels and measure sensor output voltages, I thought I'd get some feedback here. Any thoughts on the above, weigh in please. Also, wouldn't mind hearing opinions on whether I should just do the sensors or just skip that and do the whole hub assy with integrated sensors. REALLY need some feedback on which brand hubs, country of manufacture, pricing, sources etc etc...
Thanx folks