Launch control always active

[AllanR33]

Hi, I have had my link G4 fitted and mapped to my R33 GTR for over a year now but it recently started to hit what felt like a rev limiter or misfire at 5k while driving down the road.. After doing some basic engine ignition/ fuel checks, and all were fine. I started to look at the setting on the ecu. (I am a mechanic but have no mapping experience) I found the ignition trim for launch control was set to 5k. I have confirmed that launch control is continuously active. Launch RPM activation is set to 6k at 0 ground speed and 8k above 10 ground speed. If i turn launch control off the car will drive and rev all the way round to the RPM limit. 

So I am amusing the link g4 is not seeing a ground speed and think the car is always at a stop. Can anyone tell me where to check what ground speed the ecu is seeing? And what wire the signal should come down? 

Unit is a PnP link G4 for Nissan Skyline R33 GTR.

 

Thanks 

[Dave Kriedeman]

Hi AllanR33,

There should be a digital input assigned as SPEED normally DI3 unless modified from standard on a PNP Skyline ECU.

Please find attached screen shots from the HELP FILES in the software,

Regards

Dave.