Previously I was using the 12V switched in to activate the TB and Launch and it worked but I couldn't ever get the bump to work. Since then, I've switched to the Dorman 902303 relay and wired up per the write up on this site. In the "I/O test mode" when I turn High Current 2 on/off I can hear the TB pull in and out. The issue is I can't get the launch input to register. I've checked for continuity and everything checks: one lead to ground, the other to the harness connector at the ECU - no continuity until I hit the button. I've checked both digital switched in 1 and 2 in this manner. Digital switched in 3 is set up for logging and it works.
All launch testing has been with the car running and I've lowered the TPS threshold all the way to 5% without luck.
What am I missing?
Launch input not working (MS3-Pro)
Moderators: jsmcortina, muythaibxr
Launch input not working (MS3-Pro)
'77 Datsun 280Z twin turbo LS, MS3Pro equipped
745rwhp @ 7 psi
745rwhp @ 7 psi