DQS not working on downshifts

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Finding this thread very late, but I wanted to reach out and see how your QS is doing and if it's been working great if you've stuck with the settings you laid out here. I'm on a '21 SFV4S which never had great shifting since new, so I've been hunting for something resembling the performance of the aftermarket units I've installed on other bikes.. unfortunately the bike bricks with DQS Err since September '22 regardless the combination of hardware and resets I try. Typically it's the downshifts that seem to be the problem as I have similar symptoms to others on this thread where downshifts are intermittent if at all.
Been through a Cordona as well as Translogic, and now back to the OEM unit on stock mapping, but before September it was at least functional with the Cordona for 1 1/2 years. The dealer blamed the Cordona after keeping the bike for 3 weeks & telling me it needed additional harnesses to run GP shift! This has been an incredibly frustrating issue for such an amazing machine, especially as I added an IRC blipper/QS to my Monster R which never had any type of quickshifter in the first place and it is sublime. Just want my track days to be less death-defying.
Yup, no issues...using GP shift with stock gearing with the OEM shifter. I simply prefer it to the Cordona, but YMMV. Done three track days and some street riding, never a missed downshift.

The Cordona needs no setting change or wiring change to run GP, you merely switch the linkage around, same as with the OEM QS.

What frustrates me is the obd devices don't allow you to input the sprocket combination. My gearing is so far from stock the relearn doesn't work. So no clutchless downshifts.
I'd add tire size into that maybe, but I agree.
 
While going through every parameter I could find and checking every control unit for codes (which there were, in the Bosch IMU, Ohlins controller and DTC controller- since I don't know if those originated from me or from the 3 weeks the dealer was tinkering I decided to clear everything so I know where I stand), I decided to take a look at live data from the OEM QS. I had done the test before to compare voltage values to other units but not live. I found it interesting that at varying levels of pressure both directions, the voltage changed.. climbing as more pressure is applied on upshifts and dropping as more pressure is applied on downshifts. From how that shifter feels in action and descriptions of its function, I expected it to be like a snap switch but it isn't. Dave at Translogic said it's a Hall Effect switch, which seems like an odd choice, and from what I gather it is manufactured by Domino though Translogic had a bid in to supply Ducati for these bikes' quickshifters as well.
To this point I've done eveything I've found applied by other owners with similar issues aside from reteaching the gears, as mine seems very accurate as I manually move through the gearbox. So an immediate tire cal is in my future along with hopefully a functioning blip downshift and no DQS Err. It would be great to not look like an idiot at my next track day too, I have enough to contend with and don't need the non-shifter sending me off into the weeds randomly.
 
While going through every parameter I could find and checking every control unit for codes (which there were, in the Bosch IMU, Ohlins controller and DTC controller- since I don't know if those originated from me or from the 3 weeks the dealer was tinkering I decided to clear everything so I know where I stand), I decided to take a look at live data from the OEM QS. I had done the test before to compare voltage values to other units but not live. I found it interesting that at varying levels of pressure both directions, the voltage changed.. climbing as more pressure is applied on upshifts and dropping as more pressure is applied on downshifts. From how that shifter feels in action and descriptions of its function, I expected it to be like a snap switch but it isn't. Dave at Translogic said it's a Hall Effect switch, which seems like an odd choice, and from what I gather it is manufactured by Domino though Translogic had a bid in to supply Ducati for these bikes' quickshifters as well.
To this point I've done eveything I've found applied by other owners with similar issues aside from reteaching the gears, as mine seems very accurate as I manually move through the gearbox. So an immediate tire cal is in my future along with hopefully a functioning blip downshift and no DQS Err. It would be great to not look like an idiot at my next track day too, I have enough to contend with and don't need the non-shifter sending me off into the weeds randomly.
I don’t remember seeing that much variability when using the OEM. Yeah the voltage fluctuates, but the ECU is reading it down to the hundred thousandth of a volt. When using a Cordona, there is MUCH more variability to it.

I would return it to stock gearing if you haven’t done so, set the tire calibration to default, then do a fresh calibration.
 
This all sounds strange to me. My ‘21 V4SP up/down shifting/blipper works perfectly. I’m running 1 down in front & 1 up in rear sprockets. I’m also running the latest Ducati/Akra mapping with full exhaust.

Edit: I also ran the tire calibration after the update.
 
17/36 gearing. I have to think there's a limit function in the BBS. It would recaliibrate all the way to 16/38 (16/38 is the highest 525 gearing available). Unfortunately to use 17/36 you need to go to 520 (I have lots of 525 quick change rears). Maybe I'll buy a 38 520 rear and see if it'll calibrate 17/38 then try 17/36.
 
From stock 16/41 panigale to 15/45 is a 17% change. From stock sf 15/42 to 17/36 is 32%. 16/38 is also about 17% from stock sf. And that still works on my bike. So there must be a limit of 20 or 25% change. Probably in the BBS.
 
So many factors at play here. All of the different software versions, BBS and then by country etc., combined with ECU flashes etc. etc. It's a big flaccid cock to say "my bike doesn't do it."
 
Too many nannies. I'm working on the ETV maps (the bike is so much more fun to ride now and I can finally feel the motors characteristics, just rips). The stock ETV maps even in high power race must be tied to the smog requirements.
 
It would be great to not look like an idiot at my next track day too, I have enough to contend with and don't need the non-shifter sending me off into the weeds randomly.

LOL. I know what you mean (2021 V2). Missing a downshift and then grabbing a quick clutch as you are already leaning over and still on the brakes (since you are now late for the shift) at the track in the A group is no fun and really tests the stability of your setup. Other riders give you that "novice" look as they pass you -- makes you want to hold up a sign that says Ducati QS issue, really! Being forced to run stock gearing to get 98% of your downshifts is no fun either.
 
LOL. I know what you mean (2021 V2). Missing a downshift and then grabbing a quick clutch as you are already leaning over and still on the brakes (since you are now late for the shift) at the track in the A group is no fun and really tests the stability of your setup. Other riders give you that "novice" look as they pass you -- makes you want to hold up a sign that says Ducati QS issue, really! Being forced to run stock gearing to get 98% of your downshifts is no fun either.

There has to be compromise somehow- what do the race teams do? Rewrite/replace the ECU & associated control units? I can guarantee none of the WSBK teams use stock gearing or QS. I want what they're having!
After clearing/resetting/reteaching everything the bike threw a DQS Err & bricked less than a mile from my driveway.. so limped back home & repeated the process just to take note of the DTCs, then turned off DQS and did another Default/Tire Cal. Made it 26 miles before the bike bricked again. This time was especially embarrassing as I had caught another group of riders who waved me by, and when I turned up the wick the display lit up and shut everything down as I coasted onto the shoulder.. I've become a common sight on the side of the road with the tablet plugged in. So I'm forced to hand my very expensive and non-operational bike back to the dealer for who knows how long. And I will test ride it immediately when I pick it up, it seems like if they get a CEL to clear then they don't put any miles on it to see if it returns.
It's frustrating to have such a great machine progressively deteriorate, especially since it hasn't had any major changes in almost 2 years. And 0 track days so far this year, obviously, if it isn't even operational on the most basic level.
 
Yep… WSBK and WSS (V2 race bike) use 3rd party electronics. WSS use a Solo Engineering bundle.

PS I learned while reading the tech regs that the factory swingarms for WSBK teams are limited to 10k euro with ancillary linkages etc going for about 3-4k euro more
 
Yep… WSBK and WSS (V2 race bike) use 3rd party electronics. WSS use a Solo Engineering bundle.

PS I learned while reading the tech regs that the factory swingarms for WSBK teams are limited to 10k euro with ancillary linkages etc going for about 3-4k euro more

That’s interesting. I didn’t know they price cap specific items.
 
This will sound strange. I was also having problems downshifting using quickshifter randomly. I was also having excessive pulsing in my rear ABS. I changed my settings and in Race mode only the front ABS is now on and it not only cured the excessive pulsing issue, but my quickshifter now shifts flawlessly! don't understand why but it was an instant fix...
 

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