Bugger bugger bugger.... advice needed.

[moto-abruzzo]

If the engine stop relay isn't getting switched via the kill switch the fuel pump relay won't switch either, nor will the ECU read a 'run' state at pin P2E1

Check the voltage at the stop relay. You should see it toggle with the kill switch. That relay then switches the fuel pump relay. The fuel pump relay in turn provides the voltage for both pump and ECU.

If you have TuneBoy or TuneECU handy you can force the fuel pump to run from the 'Tests' page

[falcojake]

Every panel off, every sensor,switch,soldered connection,crimped connection,relay,fuse,bulb,contact,coil,earth,dash ,led,bulb holder,checked and to spec,new battery from a SUZUKI used,loom insulation cut back,continuity everywhere that should be,power everywhere it needs to be, cut off bypassed,kill switch bypassed,side stand switch bypassed,clutch switch bypassed,fuel pump works as should,fuel lines and hoses ok. Wiring loom revoved from bike, every single wire in loom checked individually checked for burns,cuts,chaffes, continuity checked through every connection. There is nothing on this bike which will stop it from running. Turn the key on and it's dead and still telling me kill switch is off. Even with switch bridged it says it's off. Aprilia technical are clueless as always, have contacted near every dealer from top of scotland to bottom of england and northern ireland.

Ave you tried swapping the engine stop relay witj a known good one? What if the contacts that make the run interlock with the ecu are broken? Can you link the pins that make this interlock ttaht abruzzo mention

[Precis]

last thing to check: ECU
try to swap from a member there in Ireland.

I lend my bike's ECU to two other Capo's in a controlled environment (bike workshop) , conclusion: both had a semi-death ECU,

Ahhh Stanley ... RHScotland's in ... ummm ... Scotland ... Ireland is a different country...

[caporiderdai]

Steve have you ever thought about making a living from Proof reading

[Capoandrew]

Bloody Journo's!!!!
HAHAHA!!!

[RH_SCOTLAND]

Well I am in Spain. Callum has done everything he can. Another ecu has been posted to him today by a forum member. A thanks to Blu!!!

Once callum gets ecu, we will see what happens. I hope to come home to a sweetly running capo! Time will tell!!!!

[RH_SCOTLAND]

Engine stop relay has been swapped! Made no difference. Down to checking the ecu Jake!

[moto-abruzzo]

Swapping plug'n play bits is one thing, but is your friend tracing voltages/earth with a multimeter? Can he confirm that you have the correct voltages at the specific pins of the ECU to eliminate the loom from the equation?

Has he tried to use TuneBoy/TuneECU to talk to the ECU .... or use the test functions?

Over the past couple of years I've only come across a couple of failed ECU's and in each case (coincidence?) the culprit behind the failure has been over-voltage from a bad rec/reg. So before he fires it up with a shiny new ECU maybe he needs to isolate the charging circuit, just in case!

Hate to see another ECU turn to toast!

[Stanleybobly]

I put my money on the ECU

[RH_SCOTLAND]

Blu's ecu arrived and callum swapped them over. Fired up with the first press of the starter switch. Result!!

Still going to cost a bit in total. Bugger bugger bugger!!!

But my sexy sweet honey is running again! Wonder if I can fly home early to take advantage of the fantastic weather in Scotland?? Or is it still raining :-D

[Stanleybobly]

I put my money on the ECU

time to collect my money

[adrianh]

RH and all the contributing guys...
Seems I have the same problem as you had RH with the ECU. Have checked just about every wire to do with ignition and fuel pumps and relays and measured voltages at various critical places but can't find anything wrong.
Had been for a ride about 2 weeks prior to the "No-start" scenario and laid the bike up in the garage. 2 weeks later kitted ourselves up, (wife as well) pushed the bike out of the garage and prepared to go for a ride down to Bakewell in the Peak District. No start..... A couple of barp, barps but no firing up. (No Error codes displayed either) Thats when all the testing started. I was at my wits end after a couple days of following all the wires and measuring voltages. As a last resort decided to download my original map that the bike was delivered with ( have been using Catfish's update for the past year and abit) with TuneECU. Once this was complete the bike fired up first go. What the hell !!!!! Then downloaded the Catfish version back into the ECU and fired up again. Thought my probelms were solved. Two days later went out to start replacing all the plastics that had been removed during fault finding and tried a quick start. Same as before. Just an occassional Barp...Barp as if a spark would get thro but not often enough. No go. Tried the TuneECU download again and this time it did not help. Still not working. What gets me though is that I can connect to the ECU via TuneECU with no problem and read all the info and do the diagnostic tests which sort of indicates that the ECU is alive but still NOT well !! I am loath to buy a replacement ECU if there is no hard proof that mine has really failed. I see there is one advertised on ebay in Bradford not too far from me for 75 quid. A further "funny" while testing was that while in the "test" section of TuneECU I was able to test the Rev counter, the rad fan, the fuel pump, the stepper motor etc and they all worked, but a while later when I tried again couldn't get them to work. Coincidence ?? Not sure. What is in the ECU ? Are there miniature relays switching the -ve thro to the coils and fuel injectors as per the wiring diagram and do these go intermittant ?? Wish I could see into the ECU but can't. The last thing I need to test is to connect up a scope meter and monitor the -ve that is switched from the ECU to the coils and injectors just to see if voltage is actually being switched onto these wires. Would assume that a Fluke would not be quick enough to monitor the voltage ??
Any ideas from the forum would be most welcome or will I be another owner to have to replace the ECU ? One would think that the ECU is partially bullet proof and should last, as it is well packaged and protected where its placed under the seat.

[Leanit]

I think the best test would be to load it back to stock mapping and trade ECU's with somebody else's. See how it goes for each Capo. That's a pure isolation test. I've got a spare I'd loan you if you weren't as far away as the sun.

They can fail in odd ways and without warning. My Triumph Daytona has the same unit, and one morning, it was just stone dead. Replaced under warranty, thankfully.

[adrianh]

Thanks for your prompt reply and thoughts about the ECU. Would I be able to search on ebay for a common type ECU as you mention that fits both the Capo and Triumph ? Do we have a generic part no for the ECU or do we have to go with the Capo part no ? What would fail in the ECU in your opinion and could it fail intermittantly ?

[pugwash]

AdrianH

If you want to try an ECU swap drop me a PM and we can try and sort out a meet up as I'm only just down the road from you. Haven't spoken for a while and I've lost your number so will have to start via PM.

Pugwash (Jim)