It will lock if you keep 8-10% TPS or more, but it unlocks when you let off
Acts like its a truck programmed to do that when its below a couple TPS, but I set TPS mins to 0 and the TCC Min TPS bit never shows Yes
What I DO see is brake switch Off - Yes and TCC Ramp Exceed - Yes
This was a manual truck, and Im pretty sure the brake switch isnt wired up (pushing brake pedal doesnt change that status bit at least)
When it DOES lock up, the Brake Switch bit does change to NO, cant tell whats cycling that though. Its somehow related to TPS - but the PCM isnt unlocking it because of TPS