Launch Control on Celica ST205

[felipeandrest205]

I was trying to use de LC with the vehicle speed sensor but for some reason didnt succes.
The actual wiring is: Speed Sensor pinout(from ECU(SP1)) to Frequency In. Frequency Out to the rest of the wire that reach the tachometer.
Det3 is reading just a constant "1" on frequency and now I have check engine because the ECU isnt reading any signal. Any help??

[Kisielisodd]

Add pullup to frequency signal in. Speed sensor is a hall, without pullup it won't work

[felipeandrest205]

Dont remember if i connected the pull up to freq in or out, will check when I go back to home

[felipeandrest205]

Finally I have done this, the DET3 is reading the speed and now I can desactivate the launch control when the car reach the speed that I tell to the DET3, but I have some problems, in random moments, for example when cruising at 80 kmh, the speed from my tach goes crazy, is going to 140kmh then to 60kmh then to 90kmh, what can be causing this? Wich would be the proper configuration of the frequency signal?
Any EcuMaster tech support that can help?
The pull up is connected to the freq signal in