[Poida58]

Gday from sunny Aussie all.

Just inherited an 02 998 which has not been stored properly and has been left sitting in a shed since 05 when it was last ridden.

Have proven (to myself) that the motor can turn over and is not gummed to excess but appears to have an electrical problem. When I hook a battery up to it everything goes (lights, horn etc) but there is no kick over at all - almost like the relays etc may be jammed.

So my question is - where do I start in the trouble shooting to determine why I have nothing to start with.??
2nd question - I have the workshop manual, the drawing list and the owners manual but all these things are fairly light on in the area of electrical schematics. If I AM to trouble shoot this problem it would be good to have some of these to have something to track my progress so does anyone know where I can obtain these???

REALLY looking forward to doing this and learning lots in the meantime AND keeping my brothers memory and love of all things DUCATI alive..:violin:

 

[Slower than you]

Kick stand interlock switch?

I'll assume a new battery since it's been sitting 10 years therefore battery connections are clean.

Tap the starter solenoid, perhaps it's sticking from sitting. Try putting 12 v directly to the starter to verify that the starter is good.

Also note that these bikes have an 'immobiiser'. When you turn the key on you have 10 seconds to start it. After that it kills the starting circuit.

 

[garylkendall]

998 doesnt have an immobilizer,, that didnt come into effect until the 999 came out. would have had a red key if it did.

 

[Slower than you]

998 does have it. Yes, no silly red key.

Wait over 10 and no start. Key off then back on yes start within 10. Swapped bikes with a guy on a ride and he found out the hard way. After a couple miles I was wondering where he was and I turned around to find him a bit frustrated.

 

[cb4265]

You don't say if the fuel pump primes when you turn the key?
Is your model 998 a desmoquattro or Testastretta?
Is it cranking but not catching and firing or just not cranking?

Craig

 

[ducktard]

If on /off switch is on and you have a good battery, side stand up, clutch lever pulled and in neutral, you should hear a faint click and the fuel pump cycle on for a moment (whirring sound in gas tank) when you turn the key. If you're not getting this you can start by checking all fuses. If none are bad try swapping the relay switches. ( little black boxes near the fuse block). Just move them around for now. If you do hear the fuel pump, try jumping the starter solenoid. ( small metal cylinder attached to the battery box). The idea is to get battery power straight to the starter motor. If none of this works, you can try fend... as in fend for yourself

 

[ducktard]

Sorry, but i have no idea of your knowledge base. So i am Assuming the old petrol has been drained and replaced, and that you have a new battery properly installed. Also there are a few safety things built in that likely vary from country to country. Side stand safety switch will not allow starter or engine run unless sidestand is up.Neutral safety switch will only allow starter to run when green neutral light is on. Something similar for the clutch.
If it was stored for 10 years with petrol in the tank there'sa chance the fuel pump has had the carrot. If it was a running bike when it was put away theres not to many other things that can be wrong. (Barring rodents eating wires and the like)... As far as a wiring diagram, my owners manual had one glued to the inside of the back cover.. It should be easy to source one on the intreweb

 

[ducati888916]

Cb4265 - all 998s are Testastretta.

 

[cb4265]

Gday from sunny Aussie all.

Just inherited an 02 998 which has not been stored properly and has been left sitting in a shed since 05 when it was last ridden.

Have proven (to myself) that the motor can turn over and is not gummed to excess but appears to have an electrical problem. When I hook a battery up to it everything goes (lights, horn etc) but there is no kick over at all - almost like the relays etc may be jammed.

So my question is - where do I start in the trouble shooting to determine why I have nothing to start with.??
2nd question - I have the workshop manual, the drawing list and the owners manual but all these things are fairly light on in the area of electrical schematics. If I AM to trouble shoot this problem it would be good to have some of these to have something to track my progress so does anyone know where I can obtain these???

REALLY looking forward to doing this and learning lots in the meantime AND keeping my brothers memory and love of all things DUCATI alive..:violin:

How's things coming along, any progress?

Craig

 

[ducati888916]

I've been playing with a 998 loom and ECU on a 996 Desmoquattro engine over the last few weeks. First up, your fuel pump should cycle up when the key and kill switch are turned on (with side stand up).

Second, get another spark plug, take the lead off the horizontal cylinder, and test if you have spark when the engine is cranking over. I didn't have any spark on mine.

Third, lift the tank and see if the shower injectors are spraying fuel when the engine is cranking.

If you have no spark, you have a problem - could be the trigger pick up.

If you have no fuel and no spark, could be trigger pick up or ECU.

Make sure the teal body of the ECU has a good earth to the bike's frame and battery.

My ECU and loom were off an old 998 race bike that I had heaps of trouble with. It was always extremely hard to start from cold, but once it was running, it was fine for the rest of the day. I replaced every single electrical component on that bike - loom, ECU, sensors, trigger pick up - everything. Nothing worked. Perhaps I should have tried an exorcism.

The original loom and ECU are what I've been playing with lately. No joy. I'm going to kill them with fire and bury them deep.

 

[Slower than you]

Just a thought,

If no spark you can check the handlebar kill switch. The contacts in it are very small and mine developed some resistance netting no spark. I cleaned them up with some #600 sandpaper and it's been good for ~4 years.

Another thing to toss out are the small relays under the battery. These are Bosch and of shit quality. The replacements are much better and sealed with epoxy. Only about $9 at the duc dealer.