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Old 08-02-2013, 10:35 AM   #1
Tigly OP
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Help needed with ECU

Please help me find out what's wrong with the bike! I am in middle of Siberia, 5 days out of Magadan. Lots of rains and puddles, one river crossing (knee high). Bike was running fine ( KTM Adventure 950 S, 2005). And then it died. Refused to start. Lights come on when key is turned to ignition but the fuel pump does not start and there is no ignition. Checked all fuses, main relay, kill switch. No spark at the plug.
Reading the repair manual, I can only blame the ECU.
Is this the most probable cause? Should I check for something else?
Thanks a lot!"
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Old 08-02-2013, 10:58 AM   #2
Defaultgateway
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No spark

Side stand switch not working will kill the ignition.
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Old 08-02-2013, 12:11 PM   #3
Gustavo.Ramos
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the ECU has nothing to do with the starting operation.

The procedure to start it comprises a series of relays that in a certain combination will allow when pressing the start button, current going from the battery to starter engine. No ECU involved.

If nothing happens, then its one of the relays/switches not working or dead battery (not this if you have lights).
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Old 08-02-2013, 03:05 PM   #4
Tigly OP
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Well, the repair manual says ECU controls the fuel pump, ignition and spark. This is not just about the ignition, as the fuel pump also doesn't seem to be "told" to start.
Side stand switch was removed long ago (and it would anyway not have anything to do with ignition in neutral)
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Old 08-02-2013, 05:24 PM   #5
Gustavo.Ramos
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Quote:
Originally Posted by Tigly View Post
Side stand switch was removed long ago (and it would anyway not have anything to do with ignition in neutral)
If you have a relay stuck in a specific position it will affect. I've had my 950 indicating (N) Neutral while riding and going through all gears, yet the green light was always on.

just to say before going $$$ on ECU try the simple things.

Try to short the starter relay with a screwdriver (bridge the 2 big screws in the starter relay). This will bypass all switches and send current directly from battery to the starter engine. Should turn the engine. Might not start it if the pump hasn't primed fuel to carbs, but at least you'll verify the operation of the starter.

Get an electric wiring scheme.
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Old 08-03-2013, 05:21 AM   #6
Katoom72
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The sidestand switch goes to a diode, even if you removed the switch the diode could be faulty.
Another possibility is the pickup of the ignition, but your pump would prime if that was the problem.

The fuel pimp priming is not controlled by the ECU. If the Pump does not prime then you have a voltage issue, the main power wire comes from the starter relais. So measure voltage there first (it probably has voltage there since the lights go on), then go on to eatch individiual part. If the pump does not get primed then there is a lose connection/bad battery/shortage. The shortage would explain the no spark issue.

Also, bridge the clutch switch to rule that one out.

And last option, the dead mans switch could be faulty.

So go around with a multimeter and rule all of those things out.
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Katoom72 screwed with this post 08-03-2013 at 05:33 AM
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