x1rider
Member
The fact that you got an error code of "injector low" when the injector connector was disconnected means the ECM is seeing the B+ coming from the start relay for the injectors. (which is Good). The "no combustion" error code is derived from current flow through the ion sensor in the coil. Strangely enough, I thought that circuit was only looked at during higher RPM and not during cranking so why you received that error code I do not know. It contradicts how I understand the no combustion circuit to work.
The fact that Both injectors do not work and fail in the same way is good and leans you on the side that the ECM is OK. It would be worse if you were at this point and only 1 injector was failing to open.
Also, just to let you know my bike is not throttle by wire. I know nothing about the set conditions that may have to be met for lift off to take place. I am sure there are a set of rules (more rules) and values that must be met and they are different than non TBW. For instance, twisting the grip during starting means nothing for TBW users. The ECM is in charge and will give the engine the amount of air it wants and not what you want.
I do have 2009 schematics and can look up the ground question but need to know what a Street Glide letters are.
You're right, the injector low does mean the ECM sees the injector. The no combustion came when I cranked the engine with no spark plugs (empty plug boots), maybe the cause was that there was no plug in the boot.
Is the 12v at the injector an "all or nothing" event? I tested both pins of the injector plugs with a voltmeter while cranking the engine and remember seeing around 10v, should it not be 12v or nothing at all (can a bad ground have the effect of only carrying 10v to the injector, causing it not to open)?
I changed my handlebars and had to buy the one piece twist grip sensor, the wires were not the same and I had to put the pins in the plug myself, perhaps I made a mistake which is screwing up the ECM???
I'll unplug the twist grip sensor and see if it works (last year I had unplugged the twist grip sensor by mistake and the bike still started but I got a DTC).
At this point I guess I have to go backwards in all the changes I made and analyze their potential effects one by one.