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Old Jul 25th 2012, 09:30 AM   #1
SPJ
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! Can Line - Word of warning

Had this come up today and wondered if anyone else had experienced anything similar. The message '! Can Line' in red across the dash illuminated and all the discreet lights (indicators, neutral, oil etc) came on as well.

By the time I had pulled in and stopped all was back to normal, had a good look around the bike but couldn't see anything amiss so continued. It then came back again several times intermittently and was on half the time by the end of the ride.

The IMPORTANT thing to note though is that it was interfering with the rider aids. I very nearly ended up splattered to the front of a car when the DTC kicked in and chopped the power. The DQS was also affected, I suspect if I'd left all the aids on I might have found ABS and EBC problems as well. I turned all the gizmo's off and made it home without incident other than the lights flashing and error message displayed at times.

Still none the wiser as to what is causing the fault, the shop took a quick look this afternoon, apparently the first place to look is a bad earth but that was fine. The diagnostic equipment confirmed there had been a fault but was unable to say where it had occurred - all parameters with the bike were normal.

Anyone have any ideas? It's pretty hot in the UK at the moment, the bike was fairly hot all morning and the engine temperature reading was blanking from time to time, as was the speedo, coinciding with the can line message.
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Old Jul 25th 2012, 09:36 AM   #2
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I Ride: '12 1199 Panigale S Tricolore, '16 X-Diavel S, '18 BMW K1600B
I would guess that there is a loose line(loose or disconnected) which would cause a communication error between the computers( which is a CANBUS communication type).
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Old Jul 25th 2012, 10:15 AM   #3
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That's pretty scary, please keep us posted.....
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Old Jul 25th 2012, 10:22 AM   #4
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can bus line.

Make sure 100% your battery and connections are ok. Half a volt out on some electronics will send them ape. I"m talking about my experiences in the auto trade. I"m guessing the diagnostic kit your dealer uses would tell them about voltage supply problems if any fault codes were posted in the ECU. Might have just been a glitch and nothing more. But yeah can"t say it any other way,connections need checking. Did your dealer take off fairing and check battery and connections?
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Old Jul 25th 2012, 10:49 AM   #5
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I'm pretty sure it's a loose connection too, just not sure where. Strange that it only happens when hot though.

Dealer was pretty good, fitted it in there and then, spent an hour with the fairings off and checking the connections and with the diagnostic kit plugged in but couldn't reproduce it. Looks like I'll have to book it in for a day and let them investigate further.
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Old Jul 25th 2012, 10:53 AM   #6
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Originally Posted by SPJ View Post
I'm pretty sure it's a loose connection too, just not sure where. Strange that it only happens when hot though.

Dealer was pretty good, fitted it in there and then, spent an hour with the fairings off and checking the connections and with the diagnostic kit plugged in but couldn't reproduce it. Looks like I'll have to book it in for a day and let them investigate further.
Heat reduces conductivity. Money on bad ground somewhere.
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Old Jul 25th 2012, 12:08 PM   #7
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Originally Posted by SPJ View Post
Had this come up today and wondered if anyone else had experienced anything similar. The message '! Can Line' in red across the dash illuminated and all the discreet lights (indicators, neutral, oil etc) came on as well.

By the time I had pulled in and stopped all was back to normal, had a good look around the bike but couldn't see anything amiss so continued. It then came back again several times intermittently and was on half the time by the end of the ride.

The IMPORTANT thing to note though is that it was interfering with the rider aids. I very nearly ended up splattered to the front of a car when the DTC kicked in and chopped the power. The DQS was also affected, I suspect if I'd left all the aids on I might have found ABS and EBC problems as well. I turned all the gizmo's off and made it home without incident other than the lights flashing and error message displayed at times.

Still none the wiser as to what is causing the fault, the shop took a quick look this afternoon, apparently the first place to look is a bad earth but that was fine. The diagnostic equipment confirmed there had been a fault but was unable to say where it had occurred - all parameters with the bike were normal.

Anyone have any ideas? It's pretty hot in the UK at the moment, the bike was fairly hot all morning and the engine temperature reading was blanking from time to time, as was the speedo, coinciding with the can line message.
It is probably the white connector plug under the rear of the tank that is the wiring for the rear light/indicators and DDA connector, some have let water in and corroded even at very low mileage
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Old Jul 28th 2012, 09:10 PM   #8
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Base on-hand only available material which is the 1199 Owners manual, English page 90 description,the displayed CAN LINE, represent the CAN line BUS is off.

i don't think is a bad or ground-shift issue as the CAN BUS which is made up of 2 lines called CANH and CANL which transmit/received messages with differential voltages from these line.

The CAN bus might have detected an error from the transmitted/received messages.The error could be wrong checksum or simply wrong number of anticipated bits of HIGH/LOW or dominant/reccessive signal detected for a known or intended message.intervention will be to shut off the CAN BUS.Retry strategy of the BUS could still be happening though for hope of recovery. That's why it may come back on, even after error.

Were you working on your bike's wiring harness intended/or by accidental before this happens? any new electronics installed?

DDS only diagnose high level/general error but will not specifically state what CAN bus error it really is and where is coming from. Question is who's controller and CAN transciever (Melco Fuel injection ECU or Bosch ABS ECU,BBS,Instrument panel) is detecting this error.ECU suppliers have means to diagnose specific error.Have Ducati dealer to pressure Ducati Co. to look into it with their suppliers.

The bike's electronics is too complicated for any of us to rationale,even more so if we have no proper tools both HW/SoftWare...

if you really are into electronics,...HSCAN transceiver example ("telephone of the Micro-controllers")
http://www.nxp.com/documents/data_sheet/TJA1042.pdf
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Old Jul 28th 2012, 09:56 PM   #9
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Originally Posted by SPJ View Post
Had this come up today and wondered if anyone else had experienced anything similar. The message '! Can Line' in red across the dash illuminated and all the discreet lights (indicators, neutral, oil etc) came on as well.

By the time I had pulled in and stopped all was back to normal, had a good look around the bike but couldn't see anything amiss so continued. It then came back again several times intermittently and was on half the time by the end of the ride.

The IMPORTANT thing to note though is that it was interfering with the rider aids. I very nearly ended up splattered to the front of a car when the DTC kicked in and chopped the power. The DQS was also affected, I suspect if I'd left all the aids on I might have found ABS and EBC problems as well. I turned all the gizmo's off and made it home without incident other than the lights flashing and error message displayed at times.

Still none the wiser as to what is causing the fault, the shop took a quick look this afternoon, apparently the first place to look is a bad earth but that was fine. The diagnostic equipment confirmed there had been a fault but was unable to say where it had occurred - all parameters with the bike were normal.

Anyone have any ideas? It's pretty hot in the UK at the moment, the bike was fairly hot all morning and the engine temperature reading was blanking from time to time, as was the speedo, coinciding with the can line message.

So... the DTC "kick's in" after the CAN Line error....

Assuming you also have the document of the 1199's vehicle wiring harness inside Owner's manual. you can see the ABS controller "owns" or directly connected to the front/rear wheel speed sensor(s).These sensors data are pass over the CANBUS from ABS ECU to EFI ECU to decide if DTC intervention is needed. As DTC cut power in stages by ignition retardation followed by fuel mass reduction so EFI is the controller.

Best guess is to look into the CAN bus portion between ABS and EFI for loose connectivity, that is provided you know where it is physically to trace on the bike....is alot of work... enjoy..

ITEM 23 & 22 F/R Wheel speed sensor
ITEM 66 ABS ECU
Attached Thumbnails
! Can Line - Word of warning-2012_1199_base_abs.jpg  

Last edited by Titaniumvalves; Jul 28th 2012 at 10:26 PM.
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Old Aug 21st 2012, 01:44 AM   #10
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Just a heads up in case anyone else has this fault, it was a duff DP alarm that was causing the problem. Currently unplugged and all is fine, awaiting a replacement.
Thanks from Brad
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