Does reversing the battery polarity blow the ECM

Steel said:
What do you mean?
Click to expand...
If there is a problem getting the N light to come on (most likely it is the sensor) then bypass that sensor - Though this has it's negatives and dangers.

Bridging the sensor full time would mean the N is always shining plus you'd never actually know. And the ECU would think you were always in N - which almost certainly has other effects. But as a stop gap with a couple of Positaps and a small switch you could fool the system into believing what you know to be true just to fire up.

But the real solution is replace it.

I had a similar problem on my old Guzzi - but there the N light being on is NOT a prerequisite for function. The sidestand switch WAS. It is bypassed and the harness altered. The Clutch WAS too but that went also decades ago.
 
One more question I have checked all the connections. Plugged in a tuneecu and checked and cleared the codes (the tip over sensor was not connected). Still no spark. I the went to look at the maps in tune ecu and there were none is this correct?
 
So you connected that tip over sensor now yes?

Normally you would see the map ID in the top left margin
But you wont see the actual details of the map without 'getting' it - you need to upload it from The ECU to the screen- it's on one of the top menu lists - dont recall which one of top of my head but will be obvious when you look under each one - it's either get map or read map
 
Thanks
 
 
After waiting for my neighbour for weeks to have a look at this no spark issue ( he is an Auto electrican) The problem was down to a dead crank angle sensor. So i can say for sure that reversing the battery on a rocket doesn't blow the ECM. I now have a bike that sort of starts after 20-30 sec's of cranking a few coughs and then finally runs and idles. Once its hot it runs fine. Anyone have any thoughts?
 
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