Stelvio "SERVICE" warning won't go away

[mohawkeye]

This afternoon I've tried to "reset service" through the "DIAGNOSTICS" mode in the dashboard "MENU", with disturbing results.

A little history: Friday I went to the motorcycle show in Long Beach, in the rain. And it was raining a bit harder when I left for home. About halfway home, my speedometer suddenly registered "0 mph", which to me indicated that the speed sensor got wet. A few miles later the general warning light ("/|\" in the top right corner) and the word "SERVICE" (at the bottom end of the dashboard) came on. I figured that I'd take care of it the next day, which is today. I turned the ignition on, went through the mode switch to "MENU", chose "DIAGNOSTICS", entered the service code "10695", and scrolled to 'RESET SERVICE" and chose "YES" to confirm the reset. Exit out, turn off ignition. Turned ignition on again and the warning light and "SERVICE" reappear. This time I first went to "DISPLAY ALARMS" to see if anything was active: ECU ERRORS 56 was active and DSB ERRORS 08 was active. I went inside to check what those codes are: ECU 56 is the speed sensor (ok, it's still wet), DSB 08 is "Oil Pressure Failure" while engine is running. DSB 08 is, to me, more cause for alarm. I then selected "RESET ERRORS" and exited the menu and turned the ignition off once again. And once more, I turned the ignition on and the warning light and "SERVICE" are still there. I checked the alarm display again, and DSB08 is inactive but ECU 56 is still active.

I then checked the oil level (cold engine) and the level is to the top of the notch on the end of the dipstick.

It appears that it'll take quite a while for the speed sensor to dry out; we have continuous rain scheduled at least until Wednesday the 22nd. It's only been out-of-commission once before, when I washed the bike, and a ride right after that restored it.

Should I still be concerned about oil pressure, or the sensor, or it's ground even though it's error no longer displays? I don't do well with electrical issues at all

 

[draidt]

There is a write up some where on this forum on how to waterproof the speed sensor, I would not sweat the oil sender failure indication just yet, If the oil filter was not filled completely prior to installing it that is probably why the DSB 08 ERROR was marked, it won't go away until it is reset like you did.

 

[kiwi dave]

I've experienced many problems with the oil pressure switch, with one bike in particular chewing through them. An easy way to check whether the sensor is faulty, is to fool the computer by providing a short circuit to ground on the wire going to the sensor, and then removing it when the motor fires up. This emulates the function of the presssure sensor when it is working properly; if the service light disappears, then the sensor is faulty.

 

[mohawkeye]

Dan and Dave, thanks for the suggestions. I'm going to wait 'til this big storm's gone and the speed sensor's had a chance to dry, then take the bike out for a flog & see if anything changes. If it's all good, I'll post.

 

[Forseti]

Once my speed sensor crapped out due to being wet... it never did dry out enough to work despite a couple weeks of good heat and dry weather.
So don't be surprised if it still fails after a period of time. I rode with mine not functioning for 3 months before I finally got a replacement and used a gps in its place for the whole time it was screwed up. (yes the service message was up the whole time... would not reset until a good sensor was in place)

 

[mohawkeye]

Today was the first sunny day here in a week! Took the Stelvio out of the garage & let 'er sit in the sun for a couple hours. Before riding over to PI to try for a warranty replacement on the speedo sensor, I checked for error codes: still had "ECU 56." Then I started 'er up, hit first gear, rode off, and whaddya know, the "SERVICE" warning and the red triangle disappeared; guess the sensor dried out. And "ECU 56" is no longer "active."

I'm still counting on the warranty replacement, and if and when I get it I'll be sure to prep the new one first, using https://www.guzzitech.com/forum/196/2773.html as a guide. If no warranty :evil: I saw a price of $60.38 at http://fastrixx.com/shop/index.php, and hope MI or MPH or MG Cycle have it for a price in the same ballpark.

Hoping everyone has a Merry Christmas

 

[Penis Rotor]

The oil pressure switch on the 8V is right down in the valley of the motor and on a Stelvio it'll be a right frontbottom to get to. You can remove the tank without taking all the front bodywork off but it helps to have a couple of mates to hold the 'Wings' out of the way. I haven't yet has a failure or problem with one of the *new* switches. They are essentially exactly the same as the *old* switches, they just have a snazzy new plug on the top of the same sort of design as the injector plugs but with only a single pin. Probably coating it with some sort of terminal protectant might help stop the problem from recurring.

Pete

 

[mohawkeye]

Thanks Pete!

 

[pauldaytona]

Today was the first sunny day here in a week! Took the Stelvio out of the garage & let 'er sit in the sun for a couple hours. Before riding over to PI to try for a warranty replacement on the speedo sensor, I checked for error codes: still had "ECU 56." Then I started 'er up, hit first gear, rode off, and whaddya know, the "SERVICE" warning and the red triangle disappeared; guess the sensor dried out. And "ECU 56" is no longer "active."

I'm still counting on the warranty replacement, and if and when I get it I'll be sure to prep the new one first, using https://www.guzzitech.com/forum/196/2773.html as a guide. If no warranty :evil: I saw a price of $60.38 at http://fastrixx.com/shop/index.php, and hope MI or MPH or MG Cycle have it for a price in the same ballpark.

Hoping everyone has a Merry Christmas

I sealed just the old one where the cable goes into it, a bit of silicone sealant will do.

But for a new one, they should look slightly different. Same part number

difference where cable goes in the housing

 

[micha]

Residual oil pressure is often cause of the oil pressure switch error. In other words if you run the engine and than quickly turn the ignition off and back on the residual oil pressure in the engine will not allow the dash to ground the signal trough the oil pressure switch thinking the switch is bad or not there.
The engineers didn't think we'd be switching them on/off/on that quickly but we do it all the time.
Also, the switches do fail more often than expected.
On ABS equipped bikes if you run the engine while the bike is on a shop stand and allow the rear wheel to spin (slowly by inertia or in gear) you will get the speedo sensor fault since the rear wheel is sending a signal and the front is not.

 

[mohawkeye]

Residual oil pressure is often cause of the oil pressure switch error. In other words if you run the engine and than quickly turn the ignition off and back on the residual oil pressure in the engine will not allow the dash to ground the signal trough the oil pressure switch thinking the switch is bad or not there.
The engineers didn't think we'd be switching them on/off/on that quickly but we do it all the time.
Also, the switches do fail more often than expected.

Thanks for the heads-up, Micha.

I rode over to PI this afternoon to put my 2 claims in (the other's a replacement for the paint-bubbled plastic ring around the fuel filler cap), and was told that the exact same parts just arrived there for another Stelvio rider's claim. I saw the "new" speedo sensor, which supposedly has better insulation at the cable's entry point, and was told by one of the techs that he'd give mine a bit of "extra" protection like he'd done this one. And it only took around two weeks for Piaggio to get the order and ship out the parts -- hope it's that good for me.