Ducati Ecu works great on 4V Stelvio

Hi guys been doing a stack of maintenance on the Stelvio so decided to have a play got a cheap Ducati 5AM Ecu off eBay loaded the Stelvio map and off we went I picked it up for £30 of eBay I've now got a spare loom of a GRiSO I'm going to cut it right down should be able to plug it all in in about 10 mins while on the road ( prob minus the air controll valve ) no relays just a live feed strait in to the Ecu & a spur to the fuel pump and should be up & running even after a complete electrical failure anywhere, Damn cheap insurance when your a long way from home I can't believe where the fuses & relays are located on an adventure bike like this one glitch & the adventure is over !

Good to know, planning a big trip ?

Always do a few long ones each year this year Italy & Spain again had such a good time in Italy last year definitely IOM for the Manx GP looking in to Morocco it's worth doing a spare ecu even if you don't go away they're crazy money from MG !, Jon.

I also picked up a Ducati 5AM ECU for the spares box as was playing with maps without a clue, didnt try it yet as assumed it would feck something up - so is it plug and play?

I think my Stelvio NTX ECU might be fecked, so I picked up a used Ducati IAW 5AM off eBay for $50.

Just pop it in and re-flash with Guzzidiag?

Only some of them have the same pin out. 1098 works.

Yes, just install and flash. What's making you think your Stelvio one is fucked?

Pete

Hmmm, the one I bought is off of an 848 Superbike, so maybe it's a no-go.

After pulling the stock ECU, figuring I had gotten some water ingress riding last in a heavy downpour, it actually looked just fine.  I went ahead and spritzed it out good with some electrical terminal cleaner before reassembling.  The bike still just doesn't want to fuel up.  It wont hold idle, nor will it spool up.  I was leaning towards ECU trickery because "Throttle Position" wouldn't increase with when given throttle while connected to Guzzidiag, and then would baseline at 10.0 before being reset once again.  This happened several times. Or perhaps it's a wonky TPS...

Thinking more about the symptoms, and after reading a recent tech post on Moto International's website, this sure seems to be describing the problem.  I'll run up to MI tomorrow and pick up their NTX fuel line and filter kit and give that a go.  If that doesn't fix it I'll try the ECU when it gets here, or try to source one with the correct pin outs.

To be continued...

If the TPS reading isn't changing I'd be looking at that first. Back probe it with an ohm meter and see if its resistance increases smoothly.

Pete

Pete Roper wrote:

...Back probe it with an ohm meter and see if its resistance increases smoothly.

That sounds rather uncomfortable.

First start would be to connect guzzidiag and look at all the sensor values. Ready to start?
temperature/ airpressure. No faults? Then you can try the tests for coils/ fuel pump and so on.

pauldaytona wrote:

First start would be to connect guzzidiag and look at all the sensor values. Ready to start?
temperature/ airpressure. No faults?  Then you can try the tests for coils/ fuel pump and so on.

The only sensors that seemed a bit wonky were throttle position and RPM. I did try the Fuel Pump in the Actors section and it lit up fine. I'll try the others again later today.

Thanks.

Ducati ECU's with 5am hw610 should work. Since the eeprom memory is used different, you could before that you change anything, read  the eeprom memory from old ecu, and write it in the ducati ecu.

first eeprom and write your map. If you want to sell it as ducati ecu, save the eeprom from ducati ecu too for later use.

pauldaytona wrote:

Ducati ECU's with 5am hw610 should work. Since the eeprom memory is used different, you could before that you change anything, read  the eeprom memory from old ecu, and write it in the ducati ecu.

first eeprom and write your map.  If you want to sell it as ducati ecu, save the eeprom from ducati ecu too for later use.

Bravo Paul, will do!

OK, Still no love. Performed the fuel pump/filter update, pump activates when keyed on and via Guzzidiag function test. Upon initial Guzzidiag connection, TPS is static at 4.80° and responded to turning the throttle with ignition off. Moved over to Actors and activated the fuel pump, L and R injectors, and L and R ignition. All responded to activation (noises were made, actually each just activated the fuel pump...) Next I checked for any faults, none current or stored. Checked plugs for spark and inspected lead connections, both were AOK.

Tried starting the engine with only occasional sputtering but would not fire and maintain idle. Then Guzzidiag read TPS as 0.00° and would not increase in response to throttle opening. Disconnected Guzzidiag.

Reconnected Guzzidiag and TPS read 4.80° once again, and responded to opening throttle. Engine still does not start. In most incidences, when attempting to start I get the red triangle alert on the dash accompanied by the "∆ SERVICE" message on the dash, but only while cranking the starter. Both alerts go off when the starter is disengaged. The engine starts to fire, but immediately then dies.

Disconnected, then reconnected once again, as I thought I saw something fishy under Advance Ignition. initially reads 0.00° before starting, then hung at 26.0° after attempting to start, another time at 5.0°. Checked again for any faults, none. Went into Actors again received error messages for both TPS reset and Clearing autolearning parameters.

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As I continue on in futility, I keep attempting starts with increasing durations of success, but still will not hold idle.

All those 5's look sus.

I suppose after starting, communication is gone. Battery is 100%? connections clean?

You can take one sparkplug out, hold against the head and let guzzidiag do the test, you should get nice sparks. Both sides.

Hi there, is the screen shot with the engine stationary ? if so the 55 RPM is odd ??, Jon.

When I made the backup wiring loom for the Stelvio the TPS wiring was the one thing I got wrong first time, I used a GRiSO 1100 loom and the only difference is that 2 of the TPS wires are reversed on the 1100 the colours are the same so I didn't notice i could do a TPS reset the reading was around 5 volts which is miles off but the once you tell the ECU this is the home position by doing a reset it believes you the bike would start and idle fine but would die when you opened the throttle now this is just a wild one but try disconnecting the clocks and starting it I am not going to say why in public, Jon.

Paul is on it. I'm the worst when it comes to hoofbeats. I'm always looking for zebras instead of horses...

Dollars to donuts Paul pegged it with the weak battery. In retrospect it makes the most sense, especially in light of the sudden symptom onset. While I did trickle up the battery a couple of days ago, it doesn't seem to be holding up to muster.

I'm picking up a new Yuasa in an hour or so, $95. I'm betting it'll be right as rain before mid afternoon...

Goddamned zebras.

Bad earth on ECU ???

I'm almost certain it's the battery. Voltage limbo dances under load...