R34 Gt-t Gearbox Speed Sensor Output

[Scando]

Hi,

I've done a lot of searching and haven't been able to find an answer. Can anyone tell me what type of signal the speed sensor on a R34 GT-t manual gearbox puts out?

I'm using this gearbox for a conversion in a 240Z and need to know what type of signal it puts out so that I know which inputs to use on my Haltech.

Thanks,

Shane

[GTSBoy]

+/- 3v approximately sine wave (or saw tooth). I might be slightly wrong on the voltage.

The Nissan box electrical senders output that sort of AC signal to the dash cluster, where the speedo head converts it into a 0-5v square wave that goes to the ECU and other CUs. I know the 0-5v is correct - I'm a little less sure right now of he size of the AC signal. Will not be more than +/-3v though, probably less.

[Scando]

Thanks very much. Looks like the Haltech will only accept speed input as digital so I'll need to get some kind of analogue to digital converter. Hopefully I can find something cheaper than the one haltech sell for $300!

[GTSBoy]

Thanks very much. Looks like the Haltech will only accept speed input as digital so I'll need to get some kind of analogue to digital converter. Hopefully I can find something cheaper than the one haltech sell for $300!

Define "digital". The 0-5v square wave is effectively digital. The Haltech will probably work with that. There is a wire from the dash to the ECU carrying that signal. All you have to do is hook it up to try it.

[Scando]

Yeah, the square wave input is what it requires but it's going in a 240Z with a racepak dash so I don't have the skyline dash to convert the signal for me. I've found Wolf sell a signal converter for around $80 so that's more reasonable.