Hi, all.

I notice something when logging on an Innovate LM-2 scanner, maximum throttle position never exceeds 80% with my foot mashed to the floor. Can anyone else confirm this on their scanner?

 

On my 2012 Sport 5MT I only see 80% on the TPS via a Scangauge II. The car was in 2nd gear, VSA off, and foot to the floor in ivtec.

 

is the throttle plate fully open when the pedal is pressed all the way? even when it says its only 80%? give me a moment and I can check with the HDS.

 

That's what I'd like to know. Thanks for looking.

 

well really all you have to do than is have someone look at the throttle plate while the the pedal is fully pressed. Honestly tho for tuning purposes I'd think you should be more worried about the TP voltage. Incase you where curious tho, I just checked. TP sensor voltage with throttle plate fully closed was 0.86V . with WOT 3.90V. You should be able to input those Voltages as the parameters for min and max in the Innovate software. Not sure if that was what you were trying to do or not. let me know if you need anymore info. ive got it all here at work.

 

When I keyed on and pressed the gas pedal, the throttle position reading didn't change. I figured it didn't do anything until the motor started. True or False?

 

False. Key On Engine Off, the throttle position reading should change. The voltage readings I gave you were with the engine not running. The thing is I don't know where or how generic scan tools get the throttle percentage. the Electronic Throttle has multiple sensors. The position of the pedal doesn't determine the actual throttle plate position or angle, the PCM does. So maybe a generic scan tool wont see it that way, only that the throttle isn't working. You should pull of the intake tube with key on engine off and have some one watch and see if the throttle plate moves while you press the pedal. If there was a malfunction the DTC indicator would illuminate. Im curious tho, is this affecting the way the wideband is datalogging?

 

I trust your voltage readings. I've still got nothing from my LM-2 scanner with just keying on. The SMT unit shows no activity, either.

The SMT unit shows 44% TPS when I've got the throttle mashed. The LM-2 unit still shows a peak of 80. That's why I trust your voltage readings. Even according to that 3.9v peak reading, I doubt that the throttle is opening fully. Wouldn't 4.9v be fully open?

 

hmm yea that is weird. Yea my 3.9V reading was what I got from the HDS so theres no wrong readings there but yea I would also think that it would be closer to 5V. When I have a little free time a little later today I will hook it up to my car and check the readings while the car is up to temp and engine running.

 

Alright so I tested a different FIT to see if there was any difference and there wasn't. Seems like 3.9V from the TPS is WOT, and @ 3.9V the relative throttle position was at 92% (both with engine off and on). The throttle angle at WOT was at 83 degrees which 90 degrees should be the plate wide open. My guess is this is normal and the way Honda designed the PCM to work which is kinda dumb and the more reason why HONDATA needs to get with the program so we have more control over this. Including The pedal postion sensor (APP), the throttle body itself has 3 sensors with three different voltage readings so im curious which sensor a generic scan tool reads off of to get 80%.
Which wire do you have SMT spliced into? Are your MIN and MAX tps parameters setup accordingly in SMT? Because altho the pcm will only allow 93% or 83 degrees angle for the throttle plate, SMT should be setup as .70V-ish as min (0%) and 3.9V for 100% throttle. I don't mean to offend your abilities but do you comprehend where im getting at? I hope this helps. . .