| Author | Message | ||
     1_mike |
Question for the people that know more than I.... Is my ECM on the way out (05, XB12S)? Have errors - 52, 53, 54, and 55. All ECM related. Is there any fix/rework I can do other than save for a new ECM ? Other than the occasional red light on the dash cluster, the engine seems to be running fine. Power, mileage, drivability...no changes, all fine. Except for the ignition timing situation I noted in another post. Thanks Mike | ||
| Teeps |
Though cracked solder joints on the ECM PCB are not common to the "S" model. That could be the problem. Check this thread: http://www.badweatherbikers.com/buell/messages/142 838/673617.html?1333122196 How often do these DTCs occur? | ||
| 1_mike |
Looks mighty possible... It started this past Monday (14th) morning on the way to work. 1. The engine coughed/misfired for a split second, the light came on, went out a second or two later. About 10 minutes later, no loss in power, but light came on for about 3 or 4 seconds, went out. 2. Tuesday...no problems. 3. Wednesday, light blinked, then came on solid, engine seemed fine. I pulled over, shut the engine off, started it, no light. The light came on a second time before starting. I noticed in the manual that it might for codes. The rest of the day, no problem. 4. Wednesday night I checked and found the error codes with ECMSpy. 5. Today, no red lights, no misfires, so far. Interesting that it's happened only in the early morning..so far ! All happened on the freeway about 80mph. Thanks for the tip. Mike | ||
| Greg_e |
Yup, I would cut the plastic off, scrape the rubber potting away, and hit every joint with a hot iron and a little fresh solder and try again. Just wrap some tape around things until you know it is fixed, then figure out where you can buy some electronics grade silicone to cover everything back up and hold the plastic together. | ||
| 1_mike |
Well...only one Monday morning 42 mile trip to work with a different ECM, but it produced no red "check engine" lights. I had to put my tune-up into this "race" ECM, and didn't get a chance to do a TPS adjust last night, but it ran...ok...this morning. I'll do the TPS adjustment tonight after I get home. Cross my fingers that it makes the next few days with no red lights on the dash. Time to cut into the original ECM to see what's there. Thanks for the help all. Mike | ||
| Readyxb |
Hi Mike, I am very interested in what you find inside the ECM, when you have a spare moment! Has the bike continued to run properly with the ECM you swapped? | ||
| 1_mike |
Readyxb - I haven't cut into the original ECM yet, but it's on my desk. And yes, It's taken some screwing with the mapping to get it to run decent. For what-ever reason, the maps from the original ECM didn't want to work correctly in the Race ECM. Yes, even after the TPS verification..! I reinstalled the original "race" maps and it runs fairly decent..."BUT" it needs to be way rich (114% AFV) to get it to run. One area is a bit too rich and one area is a little too lean, but it's close. I just havn't had time to fiddle with it. Mike | ||
| 1_mike |
Readyxb - Forgot to mention, in the limited time I've had on the XB, no red/check engine lights have occured with the new ECM. I've only checked for "error codes" once when I did the TPS verification, and it was clean. I'm back on my S1000RR (BMW) for going back and forth to work...the "piece" that it is..! Mike | ||
| Readyxb |
Thanks for the update. Your positive results so far do confirm a bad ECM. I have only seen a handful of people who reported having all four of those codes simultaneously. The puzzling thing is that the ROM/RAM are internal to the microprocessor rather than external components, so I am trying to understand how cracked solder joints, if that is the case, would affect their operation. | ||
| Reepicheep |
Crappy power or ground connections, combined with absolutely whacked out sensor inputs, could cause a lot of weird stuff to go on. I've beat on PIC's pretty extensively and they are just about infallible in terms of crashing or corruption, they just fade out when the power is too low and start again when it comes back. But I've not beat on them when they are trying to write their own flash memory. Perhaps flaky power during those operations can cause badness. | ||
| Jfkersh |
I have a race ECM that would not idle on one cylinder, no error codes were found. When I took it off I could smell a burnt odor. I was using an electronic tuning box at the time. I have read that this is not recommended with a race only box, so this was the problem in the first place, I think. Has anyone opened up the box or is that for someone who knows where to cut the thing open? | ||
| 1_mike |
At this point, I've gone into and altered the "race" ECM several times now and not had a problem. I'm still using ECMSpy. Why would changing a "race" ECM be any different from tuning a street ECM except for the mapping and other adjustable parameters ? I'm not messing with any of that other stuff anyway. I've noticed no other changes from the street ECM. The only thing I haven't seen yet is the fan "on". I haven't had the bike out on the freeway long enough or in enough traffic for the fan to come on. My XB12S is running pretty good right now. Mike |
