This is still, Unbelievable!
Professor, you pulled the information right out of the manual, did you not? Read where it says the bike will default to a 6 when the sensor is faulty. receives the wrong voltage, or is disconnected. Is there a troubleshooting tree to walk you thru the test? Why can't you see you cannot force a computer ECU to do what you think it does, when all it's doing is reading a voltage signal... be it from the sensor, or taken over by the ECU's backup mode when that sensor fails, or better yet... when you install a tre.
Just like the BUSA, the 14 runs in what's called an, "a-N method" backup for low speed A/F metering. Lose the TPS signal for high speed rpm and the ECU defaults to the, D-J method. Both computer bikes use the same system backup, only Suz calls it something else for obvious legal purposes.
I'll have to use these two (method) examples as the Busa's similar default 6 code handles the low speed rpm readings; (a-N method) is the backup fuel/ign delivery. TPS is still connected to the throttle body, so the Busa is not locked into the, (D-J type method). You cannot feel the transition from low speed digital back to sensor analog if you WOT the throttle. The metering is this precise.
Please, don't tell me I haven't done my homework delving into the ECU to understand it. I ran the bike without the GPS connected. Guess what the dash read? How did the ECU get to a locked 6 when I unplugged the the GPS from the harness. You install a tre, you receive the same locked 6. Now, the logic of this tests proves without a doubt, your theory Professor, is that the, "TRE places the correct voltage'... 'signal to the ECU..."? No Professor, It (the tre) sends an "out of range" signal that automatically alerts the ECU to load that faulty sensor (out of spec signal with the tre in between the sensor signal) in it's backup mode = 6 locked. Follow the logical progression... This is why you are confused with all the gear signals and what the ignition and fuel is doing. Bring the ATRE up and I'll show you another code (if not the same ECU backup defaulting to the "method" fuel/ign metering) harvested inside the ECU. It's that easy to understand.
I threw fuel at the 14 with one of those TFI(?) dealies. I could toggle the fuel on and off. Damn if the extra fuel didn't smooth out the ride, induce a flat spot, plus, I lost the sharp responsiveness of the, (low speed backup) a-N method setting. More fuel was the last thing the engine wanted in a 6 locker mode. That's what my 14 responded to.
Professor, I don't make the rules. I have to follow the troubleshooting logic. It either works one way, or no way. What the tre and any other non-fuel type units you plug in between the stock wire harness says it does, that aftermarket unit will trigger the default backup code(s) every single time.
This is easy, yet complex to understand. Unlike JC, which btw, I have nothing personal against the person; I just don't respond well to, "You don't need a tre, ha,ha,ha" ... as an answer. I'm trying to explain the complex in the abstract. Is using the word, "harvest" too abstract to understand what the ECU is doing? Every time you walk thru the points of fuel injection, the tre, the pcom, I'm going right back to the basics and question each person's theory.
Therefore Professor, you are the one who is WRONG here. Here is how I can back up my statement. The tre, atre, g- whatever will cause a default code in the ECU. The backups are what the units trigger. Make sense yet? Notice the pattern of a computer bike and how the voltage signal is the key to the whole ECU reading a strange voltage value that spits a code?