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Vospertw
Posted on Saturday, January 01, 2011 - 04:49 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I took my 09 XB12Ss out for a ride this morning and had several (4-5) engine light episodes, each lasting 1-2 seconds.

History - the bike has been ridden less frequently than normal - I think only 4X since 20 Nov and no rides over 50 miles. Usually I put 150+ per week but wasn't able to in December. During that time, I added factory heated grips and did the 5K checks. Bike was on a battery tender throughout.

Today - started up immediately though died on first attempt. Fired up again and ran rough for 10 seconds or so, then normal after that. Stopped for gas after 20 miles and had a "weird" start - not quite normal sounding and had an engine light for about 5 seconds which cleared. Rode for 30 miles or so before noticing engine light. Seemed to come on around 4.5K RPM and mostly in turns, though did once on straight and level at lower RPM. I did try stopping, turning the bike off, and restarting but eventually the light came back on (10 min later or so). Temps today in the low 50's. Checked oil upon return - good. Turned ignition on after shutting down and engine light performed normally - doesn't seem to indicate any stored codes per electrical manual. Bike seemed to run fine throughout.

The bike is under warranty so initially inclined to take it in (especially since I'll be gone Mon-Wed and hoping they could fix it while I'm out of town), but will there be anything to troubleshoot? I don't have any ECM tools on the computer at home. My thought was to recheck wiring from the grip installation and make sure I didn't crimp any harnesses up front - any other ideas?
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Cataract2
Posted on Saturday, January 01, 2011 - 06:33 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

You'll need to pull the codes. If you have a service manual it describes in there how you can short 2 connectors on the computer plug to have the computer flash the check engine light to get the codes.
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Vospertw
Posted on Saturday, January 01, 2011 - 09:56 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks Cataract2. I have the manual so I'll take a look at that. Sounds like I might as well get it to the dealer in any event while I'm gone. I did take a look at all the connectors/harnesses where I did the grip install and didn't see anything out of place.
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Midnightrider
Posted on Saturday, January 01, 2011 - 10:33 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Here's a link to jumping the pins to read the engine codes

http://www.badweatherbikers.com/buell/messages/327 77/146574.html

Easy. First thing to do is locate your diagnostic test plug under the seat. It's an empty four pin connector. If you're looking at it with the pins facing you and the locking tab at the 12:00 position, the pins are numbered as follows:

Pin 1 -- upper right corner
Pin 2 -- lower right corner
Pin 3 -- lower left corner
Pin 4 -- upper left corner

With the ignition switch off, install a jumper wire across pins 1 and 2 in the diagnostic plug.

Turn the ignition switch to the ON position and wait approximately 8 seconds for the check engine light to start flashing.

All trouble codes are sent out as a series of flashes. To retrieve the first digit of the code, simply observe the number of times the lamp flashes.

The transmission of a trouble code is always preceded by six rapid flashes (about 3 per second). This transmission is followed by a 2 second pause in which the lamp is off. The lamp will then flash one or more times to indicate the first digit of the trouble code. The length of time that the lamp will be either on or off when indicating a trouble code is about 1 second in duration.

Following the transmission of the first digit in the trouble code, there will be another two second pause before the second digit is transmitted.

After the second digit is transmitted, there will be another 2 second pause. After the pause comes another intermission (six rapid flashes) after which the next stored code is transmitted in the same manner. Once all the trouble codes have been displayed, the sequence will repeat.

If all you observe is the rapid flashing, then no trouble codes have been stored.

When done, turn the ignition key off and remove the jumper wire.

There is no way to clear trouble codes using this method. The only way to clear codes without hooking the bike up to a computer is to take the bike through 50 start and run cycles (start engine, run for at least 30 seconds, shut it off).

The trouble codes are as follows:

11 Throttle position sensor
13 Oxygen sensor
14 Engine temperature sensor
15 Intake air temperature sensor
16 Battery voltage
21 Interactive muffler control (XB12 only)
23 Front fuell injector
24 Front ignition coil
25 Rear ignition coil
32 Rear fuell injector
33 Fuell pump
35 Tachometer
36 Cooling fan
44 Bank angle sensor
52, 53, 54, 55 ECM failure
56 Cam sync failure

Hope this helps...
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Vospertw
Posted on Sunday, January 02, 2011 - 02:41 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks guys. Code was 16 - battery voltage. Not sure that helps me much though - battery is brand new, open circuit voltage about 13V and even with ignition on it was 12.3V. Running it was about 14.5V at various RPM - stayed pretty stable.

Guess I need a computer to determine whether it was a low voltage or high voltage error code.
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Midnightrider
Posted on Sunday, January 02, 2011 - 03:21 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I had to go back and check to be sure - but - found an old post of mine here

http://www.badweatherbikers.com/buell/messages/406 2/491616.html

I was also getting a code 16. Looks like it was a bad 77 connector. I say "looked like" because I ended up cutting out the 77 connector and hardwired it with a posilock in August 2009 and I haven't had the problem since.

The problem was intermittent but bad enough to strand me once. I did all sorts of diagnostics that pointed to a bad stator - sometimes. The 77 terminal looked fine to the naked eye - no corrosion or melting. Then one time I put pins into the wires on either side of the 77 connector and hooked the meter to the pins while I gently moved the 77 connector back and forth and the needle went all over the place. Tough to say with electrical gremlins - could have been the connector itself or maybe the wire near the connector ends. Either way it's pushing a year and a half with no recurrence. I think you said its under warranty still but you might get lucky with a $5 DIY fix. Good luck.
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Migs16
Posted on Sunday, January 02, 2011 - 04:12 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

i have this problem all the time to. Its when i sit on my bike the light goes on and off. mine is the cable going into the ecm is right under the seat. i always pull the trouble codes and get nothing. all i do is kinda mess with the wire and then it goes away. check that out but im not sure about the start up problem.
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Cataract2
Posted on Sunday, January 02, 2011 - 04:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Also, ensure battery connections are good and tight.
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Vospertw
Posted on Sunday, January 02, 2011 - 11:52 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks guys. I appreciate the info. I took it in to the dealer today - won't get looked at for a couple of days - but figured it might as well be there rather than sit in my garage until I get back Thursday.

Cataract2 - I did check the tightness of the grounds though I didn't have time to undo them, make sure they were clean, no paint, etc. Every electrical gremlin I've ever had on any bike has been traced to a bad ground.
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