Triumphrat

tigridr-1

I'm in need of an ECU to fit my 2002 Tiger. Any leads would be great.

lobout

Best shot would be to try Ebay or Craigslist, or look up bike breakers

DEcosse

You can use any of the Sagem MC1000 ECU and then use TuneECU to load the appropriate Tiger Tune. (Speed Triple, Daytona, Sprint etc through 2004 before they switched to the Keihin)

I would ask what problem you are having?
ECU issues are quite rare, they are extremely robust and I would look to other issues first.

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tigridr-1

Thanks DEcosse!! I was wondering which ECUs would work and what would need to be done. The bike was running fine out on a little ride and it just quit. No jerks or sputters...just quit. Lights,horn, blinkers would still come on and motor would crank,just wouldnt start. I finally found out fuel pump wasnt working so I got another fuel pump. Still wouldnt come on. I tried looking for a short in a wire somewhere, and found nothing. Finally took it to the Triumph Dealer and they found the ECU was in their words "fried".. So I found another used one and they got it in and they said it wasnt getting the pulse signal to the injectors from the ECU. They also said the ECU had a 1/4 volt reading on the ECU case with key off. So they think this one is not good either. So now Im looking for another one. I was wondering if my old ECU could be "reworked " by someone that works on ECU's? I think I might try again to find a Sagem MC1000 ECU and reprogram it. Wish me luck. Thanks again for your help!!

DEcosse

I would
a) find a different dealer
b) ignore the ECU suggestion* until it can be affirmatively diagnosed as the issue because it has been determined that all the input requirements present but the specific output is not present

I find that when someone says 'it must be the ECU' it is because they cannot definitively find something wrong elsewhere, yet cannot specifically assign what the ECU is doing (or not doing)
If a replacement did not 'fix' it, why should yet another?
That is called 'guessing' and gets expensive - you're already into this for a pump and an ECM and who knows many many 'diagnostic' hours?

The first big clue is that your fuel pump is not running - before even getting to the Injector pulses! I'm not sure why a dealer technician would start pursuing why injectors not firing if the pump is not even coming on.
That is job 1, the pump needs to run when the ignition first turned on.

Start by reinstalling the original ECM

My first suggestion would be to look at the side-stand switch, given the circumstances of the abrupt fail.
However, if you are confident the bike is in neutral, that should not be an issue
The side-stand switch will interlock the engine if it thinks is in gear - will crank but not start or run
However the neutral switch will over-ride that

Is the Neutral light illuminated? This is important because it tells two things
i that bike is in neutral
ii that you have positive ignition power through the key-switch/kill switch/alarm interlock.
(but ii is probably good since the bike will crank and uses the same circuit)

My next thing to look at would be the main power relay:

Can you measure 12V on Fuse 6 with ignition on/Kill to run?
(with negative probe on battery negative, touch your positive voltmeter probe to the metal tabs on top of the fuse - measure on both sides)

* I'm not categorically stating it's not the ECM - just that unless/until the diagnostics affirmatively conclude - and fact has been replaced already - would start looking elsewhere

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tigridr-1

Thanks DEcosse!! I dont have bike with me now its still at dealership. I can get it back and should get both ECUs with it. It might take me a week or so. I remember the neutral light would come on . The only light that didnt come on was the little engine light. That could mean something?? I had looked at all my fuses and they looked good (not blown)visually. Which one is the FUSE 6 ? I have a service manual and Wireing Diagram to help me.

DEcosse

MIL (check engine light) should be on with ignition until it starts - that too comes off the ECM
That also makes me think that the ECM relay is not powering on - either because it's bad or fuse/broken wire somewhere.
Fuse 6 feeds the output from the ECM relay (aka main power relay which is really misnomer) to the coils, injectors and most importantly the ECM

Don't go by how fuses look - measure each side for voltage as I described in post above:
Measure the voltage on both sides of the fuse while it is plugged in and ignition/Kill turned on
The fuse is after the relay, so if no voltage on both sides, then relay is problem
If dead just on one side, fuse is problem
If good on both sides, we need to think harder

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tigridr-1

Thanks DEcosse,

More good info. I'll have to get bike back from dealer and check the above. I'll let you know when I get her back home. Thanks!!

DEcosse

Good call on getting it back - I'm hopeful I will be able to guide you to affirmative diagnosis.
(which will include determining whether or not it is the ECM)

I'll try to keep eye on this - however if I don't check back into this thread, PM me when you're ready to look into it, past what I've suggested above. But if you get the info requested that is good start.

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DEcosse

What's the latest tigridr-1 - did you get bike back? Any progress to date?

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