Serious Electronic Problem

bp7178 said:

Well, a piggyback would intercept the signals coming from the ECU and modify them before they hit the injectors.

So, in theory, unless the piggyback was modifying the messed up signals, you would have the same problem. Your ECU (assuming that is the trouble part) could be misinterpreting incoming air sensors and that is causing your issue.

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Looks like I need to sort out the ecu first before anything else...

Just seeing this now....I had an issue that shared a couple similarities, but it seems like a different issue overall (mine only happened at idle). Never did find out what was causing it. Everything major was replaced (under warranty), and the problem persisted. Hope you can track your issue down sooner than later.

Bike's at the dealer.. Will see what solution they offer.

Try checking the Crank Position Sensor and the gap. I had a similar issue (999R) and the problem only occurs once the motor is hot. I assume the heated motor caused the gap to increase ever so slightly.

Try whacking the throttle open as you're cruising. See if it struggles to accelerate or respond to rapid change in throttle changes.

Ok update, issue still isn't fix.

We have try afew more things and still no improvement. So have identified the problem as the Ducati Quick Shift. When the DQS is turn on in the dash the problem occurs as soon as you switch it off the problem goes away (i have setup SPORT for DQS Off and RACE with DQS on, you can ride along in sport no issue, switch it into race on the fly and as soon as you give it any throttle bang the problem happens, switch it back to SPORT problem is gone)

We have unplug the QuickShift, and with DQS on the problem still occurs.

We have since replaced the DASH and added the harness upgrade still no improvement.

I decided to go have a chat to my local dealership as at the moment the work is being done by a independent ducati specialist. They where less than helpful pretty much telling me that the problem was down to the ecu needing a relearn and to do that would cost me $200 and they could not guarantee me that would solve the problem. They didn't seems to want to accept that we had already try that and also swap the ecu and bbs out for a working unit and that did nothing.

So seeing as i have a tuneboy ecu, the workshop called tuneboy and ask there opinion if they had any ideas, from tuneboy suggestion we have decided to try the following.

Removing the Wire that goes from the QS sensors to the ecu, as we believe the issue may be in the wiring harness of the bike. we will be doing that this week, if that solve the problem we have few opinions.

A) remove harness and check the wiring to see if it is damage, and then repair or replace the harness

B) Add a new wire to the QS and run it directly to the ECU by passing the possible damage wire in the harness

C) Install a tuneboy auto-blip downshift as that control both the QS up and down and is connected to the O2 sensor plug and doesn't use the factory wiring harness

So Finally we have found the problem!

The problem is in the wiring harness! The wire which sends the signal from the QS sensor to the ecu.

For the moment we have just ran a new wire from the QS to the ECU, so we bypass the wire in the harness. However at some same we will need to pull the wiring harness out and investigate what cause this issue as there is a high change that if this wire got damage in someway that other wires may also start to .... up aswell

To be honest i am pretty disappointed in the build quality of my bike, this isn't the first problem i have experienced due to poor build quality. What makes the problem worst is how difficult it is dealing with ducati. I will be contacting Ducati directly to see what they have to say because a bike that is less than 3 years old and has not been in any major accidents shouldn't be having wiring issues

Hey kaido

Thank you so much for the feedback!
One of the thinks I really don't like on the new Ducatis is that they don't use these rubber ties anymore but switched to zip ties which easely harm the harness tubes

I have not found any vendor yet that sells these old-fashion ties in large quantities. But as soon as I find one, I will replace all zip ties on the pani!

Great to hear you found the problem. This should help others in the future!

kaido said:

Hi,

I am having a major issue with my 2012 1199 Base and was wondering if anyone has had similar issues?

The issue i am having is that in any gear no matter what the throttle position is the rpm of the bike jumps around and does not accelerated, the bike backfires and throws huge flames out of the exhaust. and it is a mix between misfiring or not firing cylinder at all.

Once the clutch is full disengage the problem happens, you can rev the bike in Neutral without an issue (most of the time), but once you let go off the clutch and have it in gear the problem happens.

So we put the bike on a diagnose software, that came up with 2 errors, one being a CAN BUS error and the second being an error with the main ECU (there are no error lights on the dash).

So we swap out the ecu for another one on a working bike, the issue seem to go away but then started to happen at around 4,000-5,000rpm and then got progressively worst and was doing it everywhere in the rpm range and in every gear.

We then put the bike back onto the diagnose software and the errors it came up with was "CAN BUS" again and an error with the BBS unit.

I have a BBS unit coming from another workshop to test out to see if that solve the problem.

Has anyone had this issue? ATM no one has any idea and never heard of this issue, we have talk to 2 ducati dealership and they have no clue.

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i had this issue... its the gear sensor is broken somehow which affects BBS..

if under warranty take it back if not... tell them to check the gear sensor..

kaido said:

So Finally we have found the problem!

The problem is in the wiring harness! The wire which sends the signal from the QS sensor to the ecu.

For the moment we have just ran a new wire from the QS to the ECU, so we bypass the wire in the harness. However at some same we will need to pull the wiring harness out and investigate what cause this issue as there is a high change that if this wire got damage in someway that other wires may also start to .... up aswell

To be honest i am pretty disappointed in the build quality of my bike, this isn't the first problem i have experienced due to poor build quality. What makes the problem worst is how difficult it is dealing with ducati. I will be contacting Ducati directly to see what they have to say because a bike that is less than 3 years old and has not been in any major accidents shouldn't be having wiring issues

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Glad you found the problem

Some updates on my bike;

Problems came back happened after 2nd ride, thus ECU is not the problem. They found the front cylinder spark plug cable has snapped internally when they tried to measure the voltage. To save myself further trouble, got them to change both cables at the same time. But problem persisted.

Next they found the lambda sensor for the front exhaust also konked out, and that too was replaced but to no avail.

By the stroke of luck, another bike with similar problem came to the workshop, and it showed a yellow error code for the throttle positioning sensor connector, which means its having intermittent problem, and recommended to disconnect and regrets or something like that to take out the moisture. They did the same to my bike and so far, for the past few rides, everything seems to be normal now.. Fingers crossed!!

Asked them why mine was not showing the error code, they reckon that mine intermittent frequency was longer, thus it registered nothing wrong when they plugged it in.

In any case, all is good so far, so I am just happy that the issue is solved... for now.


(for the record, I did asked them about the throttle positioning sensor before as recommended by fellow former but if it doesn't pop and codes, they usually assume its working, so I really gotta thank the other bike's owner for it)

That's crazy how many small problems they found before they solved it. What did you pay in repairs in total parts and labor for everything that you have changed out? If you don't mind me asking.

These problems with all the highly sophisticated electronics on all vehicles
Tends to leave many techs just parts changers rather than fully diagnosing
the problem. Think a lot has to do with the scanners which just pop up the
mostly likely sensor when the trouble is down the line

I have a similar prob with a gsxr 1000 turned out to be the fuel pump in my case

Whoopazz said:

That's crazy how many small problems they found before they solved it. What did you pay in repairs in total parts and labor for everything that you have changed out? If you don't mind me asking.

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Have yet to make payment... Our local dealers are pretty nice, probably also due to more than a decade years of customer relationship with them. Told me to test it out for a few weeks to be sure all is good before talking about billing.

sean999r said:

These problems with all the highly sophisticated electronics on all vehicles
Tends to leave many techs just parts changers rather than fully diagnosing
the problem. Think a lot has to do with the scanners which just pop up the
mostly likely sensor when the trouble is down the line

Click to expand...

Reckon that's how it's gonna be.. Vehicles are not longer just motor and wheels, they are practically supercomputers on wheels..

kaido said:

So Finally we have found the problem!

The problem is in the wiring harness! The wire which sends the signal from the QS sensor to the ecu.

......

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What wrong with the wiring harness? Broken contact or shorted to battery or chasis?

...I'm quite puzzle this isn't big up by the ECU and setting a Diagnostic Trouble code code at all....

any glad to learnt from your experience...

Titaniumvalves said:

What wrong with the wiring harness? Broken contact or shorted to battery or chasis?

...I'm quite puzzle this isn't big up by the ECU and setting a Diagnostic Trouble code code at all....

any glad to learnt from your experience...

Click to expand...

nope all those points are fine, it looks to be on the actual wire that goes from the QS sensors to the ECU.

I haven't had time to pull the harness apart yet so can't confirm exactly what the damage is yet